2020-03-10 03:31:08

by Robin Gong

Subject: [RESEND v6 00/13] add ecspi ERR009165 for i.mx6/7 soc family

There is ecspi ERR009165 on i.mx6/7 soc family, which cause FIFO
transfer to be send twice in DMA mode. Please get more information from:
https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf. The workaround is adding
new sdma ram script which works in XCH mode as PIO inside sdma instead
of SMC mode, meanwhile, 'TX_THRESHOLD' should be 0. The issue should be
exist on all legacy i.mx6/7 soc family before i.mx6ul.
NXP fix this design issue from i.mx6ul, so newer chips including i.mx6ul/
6ull/6sll do not need this workaroud anymore. All other i.mx6/7/8 chips
still need this workaroud. This patch set add new 'fsl,imx6ul-ecspi'
for ecspi driver and 'ecspi_fixed' in sdma driver to choose if need errata
or not.
The first two reverted patches should be the same issue, though, it
seems 'fixed' by changing to other shp script. Hope Sean or Sascha could
have the chance to test this patch set if could fix their issues.
Besides, enable sdma support for i.mx8mm/8mq and fix ecspi1 not work
on i.mx8mm because the event id is zero.

PS:
Please get sdma firmware from below linux-firmware and copy it to your
local rootfs /lib/firmware/imx/sdma.
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/imx/sdma

v2:
1.Add commit log for reverted patches.
2.Add comment for 'ecspi_fixed' in sdma driver.
3.Add 'fsl,imx6sll-ecspi' compatible instead of 'fsl,imx6ul-ecspi'
rather than remove.
v3:
1.Confirm with design team make sure ERR009165 fixed on i.mx6ul/i.mx6ull
/i.mx6sll, not fixed on i.mx8m/8mm and other i.mx6/7 legacy chips.
Correct dts related dts patch in v2.
2.Clean eratta information in binding doc and new 'tx_glitch_fixed' flag
in spi-imx driver to state ERR009165 fixed or not.
3.Enlarge burst size to fifo size for tx since tx_wml set to 0 in the
errata workaroud, thus improve performance as possible.
v4:
1.Add Ack tag from Mark and Vinod
2.Remove checking 'event_id1' zero as 'event_id0'.
v5:
1.Add the last patch for compatible with the current uart driver which
using rom script, so both uart ram script and rom script supported
in latest firmware, by default uart rom script used. UART driver
will be broken without this patch.
v6:
1.Resend after rebase the latest next branch.
2.Remove below No.13~No.15 patches of v5 because they were mergered.
ARM: dts: imx6ul: add dma support on ecspi
ARM: dts: imx6sll: correct sdma compatible
arm64: defconfig: Enable SDMA on i.mx8mq/8mm
3.Revert "dmaengine: imx-sdma: fix context cache" since
'context_loaded' removed.

Robin Gong (13):
Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core"
Revert "ARM: dts: imx6: Use correct SDMA script for SPI cores"
Revert "dmaengine: imx-sdma: refine to load context only once"
dmaengine: imx-sdma: remove dupilicated sdma_load_context
dmaengine: imx-sdma: add mcu_2_ecspi script
spi: imx: fix ERR009165
spi: imx: remove ERR009165 workaround on i.mx6ul
spi: imx: add new i.mx6ul compatible name in binding doc
dmaengine: imx-sdma: remove ERR009165 on i.mx6ul
dma: imx-sdma: add i.mx6ul/6sx compatible name
dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm
dmaengine: imx-sdma: add uart rom script
Revert "dmaengine: imx-sdma: fix context cache"

.../devicetree/bindings/dma/fsl-imx-sdma.txt | 2 +
.../devicetree/bindings/spi/fsl-imx-cspi.txt | 1 +
arch/arm/boot/dts/imx6q.dtsi | 2 +-
arch/arm/boot/dts/imx6qdl.dtsi | 8 +-
drivers/dma/imx-sdma.c | 89 ++++++++++++++++------
drivers/spi/spi-imx.c | 61 ++++++++++++---
include/linux/platform_data/dma-imx-sdma.h | 8 +-
7 files changed, 130 insertions(+), 41 deletions(-)

--
2.7.4

2020-03-10 03:31:27

by Robin Gong

Subject: [RESEND v6 01/13] Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core"

There are two ways for SDMA accessing SPBA devices: one is SDMA->AIPS
->SPBA(masterA port), another is SDMA->SPBA(masterC port). Please refer
to the 'Figure 58-1. i.MX 6Dual/6Quad SPBA connectivity' of i.mx6DQ
Reference Manual. SDMA provide the corresponding app_2_mcu/mcu_2_app and
shp_2_mcu/mcu_2_shp script for such two options. So both AIPS and SPBA
scripts should keep the same behaviour, the issue only caught in AIPS
script sounds not solide.
The issue is more likely as the ecspi errata
ERR009165(http://www.nxp.com/docs/en/errata/IMX6DQCE.pdf):
eCSPI: TXFIFO empty flag glitch can cause the current FIFO transfer to
be sent twice
So revert commit 'df07101e1c4a' firstly.

Signed-off-by: Robin Gong <[email protected]>
---
arch/arm/boot/dts/imx6q.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
index 0fad13f..81f693e 100644
--- a/arch/arm/boot/dts/imx6q.dtsi
+++ b/arch/arm/boot/dts/imx6q.dtsi
@@ -175,7 +175,7 @@
clocks = <&clks IMX6Q_CLK_ECSPI5>,
<&clks IMX6Q_CLK_ECSPI5>;
clock-names = "ipg", "per";
- dmas = <&sdma 11 8 1>, <&sdma 12 8 2>;
+ dmas = <&sdma 11 7 1>, <&sdma 12 7 2>;
dma-names = "rx", "tx";
status = "disabled";
};
--
2.7.4

2020-03-10 03:31:27

by Robin Gong

Subject: [RESEND v6 02/13] Revert "ARM: dts: imx6: Use correct SDMA script for SPI cores"

There are two ways for SDMA accessing SPBA devices: one is SDMA->AIPS
->SPBA(masterA port), another is SDMA->SPBA(masterC port). Please refer
to the 'Figure 58-1. i.MX 6Dual/6Quad SPBA connectivity' of i.mx6DQ
Reference Manual. SDMA provide the corresponding app_2_mcu/mcu_2_app and
shp_2_mcu/mcu_2_shp script for such two options. So both AIPS and SPBA
scripts should keep the same behaviour, the issue only caught in AIPS
script sounds not solide.
The issue is more likely as the ecspi errata
ERR009165(http://www.nxp.com/docs/en/errata/IMX6DQCE.pdf):
eCSPI: TXFIFO empty flag glitch can cause the current FIFO transfer to
be sent twice
So revert commit 'dd4b487b32a3' firstly.

Signed-off-by: Robin Gong <[email protected]>
---
arch/arm/boot/dts/imx6qdl.dtsi | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index 70fb8b5..ff197b5 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -337,7 +337,7 @@
clocks = <&clks IMX6QDL_CLK_ECSPI1>,
<&clks IMX6QDL_CLK_ECSPI1>;
clock-names = "ipg", "per";
- dmas = <&sdma 3 8 1>, <&sdma 4 8 2>;
+ dmas = <&sdma 3 7 1>, <&sdma 4 7 2>;
dma-names = "rx", "tx";
status = "disabled";
};
@@ -351,7 +351,7 @@
clocks = <&clks IMX6QDL_CLK_ECSPI2>,
<&clks IMX6QDL_CLK_ECSPI2>;
clock-names = "ipg", "per";
- dmas = <&sdma 5 8 1>, <&sdma 6 8 2>;
+ dmas = <&sdma 5 7 1>, <&sdma 6 7 2>;
dma-names = "rx", "tx";
status = "disabled";
};
@@ -365,7 +365,7 @@
clocks = <&clks IMX6QDL_CLK_ECSPI3>,
<&clks IMX6QDL_CLK_ECSPI3>;
clock-names = "ipg", "per";
- dmas = <&sdma 7 8 1>, <&sdma 8 8 2>;
+ dmas = <&sdma 7 7 1>, <&sdma 8 7 2>;
dma-names = "rx", "tx";
status = "disabled";
};
@@ -379,7 +379,7 @@
clocks = <&clks IMX6QDL_CLK_ECSPI4>,
<&clks IMX6QDL_CLK_ECSPI4>;
clock-names = "ipg", "per";
- dmas = <&sdma 9 8 1>, <&sdma 10 8 2>;
+ dmas = <&sdma 9 7 1>, <&sdma 10 7 2>;
dma-names = "rx", "tx";
status = "disabled";
};
--
2.7.4

2020-03-10 03:31:44

by Robin Gong

Subject: [RESEND v6 04/13] dmaengine: imx-sdma: remove dupilicated sdma_load_context

Since sdma_transfer_init() will do sdma_load_context before any
sdma transfer, no need once more in sdma_config_channel().

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Vinod Koul <[email protected]>
---
drivers/dma/imx-sdma.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 4c11c38..a7656a4 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1137,7 +1137,6 @@ static void sdma_set_watermarklevel_for_p2p(struct sdma_channel *sdmac)
static int sdma_config_channel(struct dma_chan *chan)
{
struct sdma_channel *sdmac = to_sdma_chan(chan);
- int ret;

sdma_disable_channel(chan);

@@ -1177,9 +1176,7 @@ static int sdma_config_channel(struct dma_chan *chan)
sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */
}

- ret = sdma_load_context(sdmac);
-
- return ret;
+ return 0;
}

static int sdma_set_channel_priority(struct sdma_channel *sdmac,
--
2.7.4

2020-03-10 03:31:55

by Robin Gong

Subject: [RESEND v6 05/13] dmaengine: imx-sdma: add mcu_2_ecspi script

Add mcu_2_ecspi script to fix ecspi errata ERR009165.

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Vinod Koul <[email protected]>
---
drivers/dma/imx-sdma.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index a7656a4..56288d8 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -920,6 +920,9 @@ static void sdma_get_pc(struct sdma_channel *sdmac,
emi_2_per = sdma->script_addrs->mcu_2_ata_addr;
break;
case IMX_DMATYPE_CSPI:
+ per_2_emi = sdma->script_addrs->app_2_mcu_addr;
+ emi_2_per = sdma->script_addrs->mcu_2_ecspi_addr;
+ break;
case IMX_DMATYPE_EXT:
case IMX_DMATYPE_SSI:
case IMX_DMATYPE_SAI:
--
2.7.4

2020-03-10 03:32:07

by Robin Gong

Subject: [RESEND v6 06/13] spi: imx: fix ERR009165

Change to XCH mode even in dma mode, please refer to the below
errata:
https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Mark Brown <[email protected]>
---
drivers/spi/spi-imx.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index f4f28a4..842a86e 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -585,8 +585,9 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
spi_imx->spi_bus_clk = clk;

+ /* ERR009165: work in XHC mode as PIO */
if (spi_imx->usedma)
- ctrl |= MX51_ECSPI_CTRL_SMC;
+ ctrl &= ~MX51_ECSPI_CTRL_SMC;

writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);

@@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,

static void mx51_setup_wml(struct spi_imx_data *spi_imx)
{
+ u32 tx_wml = 0;
+
/*
* Configure the DMA register: setup the watermark
* and enable DMA request.
*/
writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) |
- MX51_ECSPI_DMA_TX_WML(spi_imx->wml) |
+ MX51_ECSPI_DMA_TX_WML(tx_wml) |
MX51_ECSPI_DMA_RXT_WML(spi_imx->wml) |
MX51_ECSPI_DMA_TEDEN | MX51_ECSPI_DMA_RXDEN |
MX51_ECSPI_DMA_RXTDEN, spi_imx->base + MX51_ECSPI_DMA);
@@ -1171,7 +1174,11 @@ static int spi_imx_dma_configure(struct spi_master *master)
tx.direction = DMA_MEM_TO_DEV;
tx.dst_addr = spi_imx->base_phys + MXC_CSPITXDATA;
tx.dst_addr_width = buswidth;
- tx.dst_maxburst = spi_imx->wml;
+ /*
+ * For ERR009165 with tx_wml = 0 could enlarge burst size to fifo size
+ * to speed up fifo filling as possible.
+ */
+ tx.dst_maxburst = spi_imx->devtype_data->fifo_size;
ret = dmaengine_slave_config(master->dma_tx, &tx);
if (ret) {
dev_err(spi_imx->dev, "TX dma configuration failed with %d\n", ret);
@@ -1265,10 +1272,6 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
{
int ret;

- /* use pio mode for i.mx6dl chip TKT238285 */
- if (of_machine_is_compatible("fsl,imx6dl"))
- return 0;
-
spi_imx->wml = spi_imx->devtype_data->fifo_size / 2;

/* Prepare for TX DMA: */
--
2.7.4

2020-03-10 03:32:14

by Robin Gong

Subject: [RESEND v6 07/13] spi: imx: remove ERR009165 workaround on i.mx6ul

ERR009165 fixed on i.mx6ul/6ull/6sll. All other i.mx6/7 and
i.mx8m/8mm still need this errata. Please refer to nxp official
errata document from https://www.nxp.com/ .

For removing workaround on those chips. Add new i.mx6ul type.

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Mark Brown <[email protected]>
---
drivers/spi/spi-imx.c | 50 +++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 45 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 842a86e..f7ee2ec 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -57,6 +57,7 @@ enum spi_imx_devtype {
IMX35_CSPI, /* CSPI on all i.mx except above */
IMX51_ECSPI, /* ECSPI on i.mx51 */
IMX53_ECSPI, /* ECSPI on i.mx53 and later */
+ IMX6UL_ECSPI, /* ERR009165 fix from i.mx6ul */
};

struct spi_imx_data;
@@ -75,6 +76,11 @@ struct spi_imx_devtype_data {
bool has_slavemode;
unsigned int fifo_size;
bool dynamic_burst;
+ /*
+ * ERR009165 fixed or not:
+ * https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
+ */
+ bool tx_glitch_fixed;
enum spi_imx_devtype devtype;
};

@@ -128,7 +134,8 @@ static inline int is_imx35_cspi(struct spi_imx_data *d)

static inline int is_imx51_ecspi(struct spi_imx_data *d)
{
- return d->devtype_data->devtype == IMX51_ECSPI;
+ return d->devtype_data->devtype == IMX51_ECSPI ||
+ d->devtype_data->devtype == IMX6UL_ECSPI;
}

static inline int is_imx53_ecspi(struct spi_imx_data *d)
@@ -585,9 +592,16 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
spi_imx->spi_bus_clk = clk;

- /* ERR009165: work in XHC mode as PIO */
- if (spi_imx->usedma)
- ctrl &= ~MX51_ECSPI_CTRL_SMC;
+ /*
+ * ERR009165: work in XHC mode instead of SMC as PIO on the chips
+ * before i.mx6ul.
+ */
+ if (spi_imx->usedma) {
+ if (spi_imx->devtype_data->tx_glitch_fixed)
+ ctrl |= MX51_ECSPI_CTRL_SMC;
+ else
+ ctrl &= ~MX51_ECSPI_CTRL_SMC;
+ }

writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);

@@ -615,6 +629,8 @@ static void mx51_setup_wml(struct spi_imx_data *spi_imx)
{
u32 tx_wml = 0;

+ if (spi_imx->devtype_data->tx_glitch_fixed)
+ tx_wml = spi_imx->wml;
/*
* Configure the DMA register: setup the watermark
* and enable DMA request.
@@ -1012,6 +1028,23 @@ static struct spi_imx_devtype_data imx53_ecspi_devtype_data = {
.devtype = IMX53_ECSPI,
};

+static struct spi_imx_devtype_data imx6ul_ecspi_devtype_data = {
+ .intctrl = mx51_ecspi_intctrl,
+ .prepare_message = mx51_ecspi_prepare_message,
+ .prepare_transfer = mx51_ecspi_prepare_transfer,
+ .trigger = mx51_ecspi_trigger,
+ .rx_available = mx51_ecspi_rx_available,
+ .reset = mx51_ecspi_reset,
+ .setup_wml = mx51_setup_wml,
+ .fifo_size = 64,
+ .has_dmamode = true,
+ .dynamic_burst = true,
+ .has_slavemode = true,
+ .tx_glitch_fixed = true,
+ .disable = mx51_ecspi_disable,
+ .devtype = IMX6UL_ECSPI,
+};
+
static const struct platform_device_id spi_imx_devtype[] = {
{
.name = "imx1-cspi",
@@ -1035,6 +1068,9 @@ static const struct platform_device_id spi_imx_devtype[] = {
.name = "imx53-ecspi",
.driver_data = (kernel_ulong_t) &imx53_ecspi_devtype_data,
}, {
+ .name = "imx6ul-ecspi",
+ .driver_data = (kernel_ulong_t) &imx6ul_ecspi_devtype_data,
+ }, {
/* sentinel */
}
};
@@ -1047,6 +1083,7 @@ static const struct of_device_id spi_imx_dt_ids[] = {
{ .compatible = "fsl,imx35-cspi", .data = &imx35_cspi_devtype_data, },
{ .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, },
{ .compatible = "fsl,imx53-ecspi", .data = &imx53_ecspi_devtype_data, },
+ { .compatible = "fsl,imx6ul-ecspi", .data = &imx6ul_ecspi_devtype_data, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, spi_imx_dt_ids);
@@ -1178,7 +1215,10 @@ static int spi_imx_dma_configure(struct spi_master *master)
* For ERR009165 with tx_wml = 0 could enlarge burst size to fifo size
* to speed up fifo filling as possible.
*/
- tx.dst_maxburst = spi_imx->devtype_data->fifo_size;
+ if (spi_imx->devtype_data->tx_glitch_fixed)
+ tx.dst_maxburst = spi_imx->wml;
+ else
+ tx.dst_maxburst = spi_imx->devtype_data->fifo_size;
ret = dmaengine_slave_config(master->dma_tx, &tx);
if (ret) {
dev_err(spi_imx->dev, "TX dma configuration failed with %d\n", ret);
--
2.7.4

2020-03-10 03:32:19

by Robin Gong

Subject: [RESEND v6 09/13] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

ECSPI issue fixed from i.mx6ul at hardware level, no need
ERR009165 anymore on those chips such as i.mx8mq. Add i.mx6sx
from where i.mx6ul source.

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Vinod Koul <[email protected]>
---
drivers/dma/imx-sdma.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 50 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 56288d8..5ae7237 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -419,6 +419,13 @@ struct sdma_driver_data {
int num_events;
struct sdma_script_start_addrs *script_addrs;
bool check_ratio;
+ /*
+ * ecspi ERR009165 fixed should be done in sdma script
+ * and it has been fixed in soc from i.mx6ul.
+ * please get more information from the below link:
+ * https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
+ */
+ bool ecspi_fixed;
};

struct sdma_engine {
@@ -539,6 +546,31 @@ static struct sdma_driver_data sdma_imx6q = {
.script_addrs = &sdma_script_imx6q,
};

+static struct sdma_script_start_addrs sdma_script_imx6sx = {
+ .ap_2_ap_addr = 642,
+ .uart_2_mcu_addr = 817,
+ .mcu_2_app_addr = 747,
+ .uartsh_2_mcu_addr = 1032,
+ .mcu_2_shp_addr = 960,
+ .app_2_mcu_addr = 683,
+ .shp_2_mcu_addr = 891,
+ .spdif_2_mcu_addr = 1100,
+ .mcu_2_spdif_addr = 1134,
+};
+
+static struct sdma_driver_data sdma_imx6sx = {
+ .chnenbl0 = SDMA_CHNENBL0_IMX35,
+ .num_events = 48,
+ .script_addrs = &sdma_script_imx6sx,
+};
+
+static struct sdma_driver_data sdma_imx6ul = {
+ .chnenbl0 = SDMA_CHNENBL0_IMX35,
+ .num_events = 48,
+ .script_addrs = &sdma_script_imx6sx,
+ .ecspi_fixed = true,
+};
+
static struct sdma_script_start_addrs sdma_script_imx7d = {
.ap_2_ap_addr = 644,
.uart_2_mcu_addr = 819,
@@ -584,9 +616,15 @@ static const struct platform_device_id sdma_devtypes[] = {
.name = "imx6q-sdma",
.driver_data = (unsigned long)&sdma_imx6q,
}, {
+ .name = "imx6sx-sdma",
+ .driver_data = (unsigned long)&sdma_imx6sx,
+ }, {
.name = "imx7d-sdma",
.driver_data = (unsigned long)&sdma_imx7d,
}, {
+ .name = "imx6ul-sdma",
+ .driver_data = (unsigned long)&sdma_imx6ul,
+ }, {
.name = "imx8mq-sdma",
.driver_data = (unsigned long)&sdma_imx8mq,
}, {
@@ -602,7 +640,9 @@ static const struct of_device_id sdma_dt_ids[] = {
{ .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, },
{ .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
{ .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, },
+ { .compatible = "fsl,imx6sx-sdma", .data = &sdma_imx6sx, },
{ .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, },
+ { .compatible = "fsl,imx6ul-sdma", .data = &sdma_imx6ul, },
{ .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx8mq, },
{ /* sentinel */ }
};
@@ -1169,8 +1209,17 @@ static int sdma_config_channel(struct dma_chan *chan)
if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP ||
sdmac->peripheral_type == IMX_DMATYPE_ASRC)
sdma_set_watermarklevel_for_p2p(sdmac);
- } else
+ } else {
+ /*
+ * ERR009165 fixed from i.mx6ul, no errata need,
+ * set bit31 to let sdma script skip the errata.
+ */
+ if (sdmac->peripheral_type == IMX_DMATYPE_CSPI &&
+ sdmac->direction == DMA_MEM_TO_DEV &&
+ sdmac->sdma->drvdata->ecspi_fixed)
+ __set_bit(31, &sdmac->watermark_level);
__set_bit(sdmac->event_id0, sdmac->event_mask);
+ }

/* Address */
sdmac->shp_addr = sdmac->per_address;
--
2.7.4

2020-03-10 03:32:26

by Robin Gong

Subject: [RESEND v6 10/13] dma: imx-sdma: add i.mx6ul/6sx compatible name

Add i.mx6ul and i.mx6sx compatible name in binding doc.

Signed-off-by: Robin Gong <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt | 2 ++
1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
index c9e9740..19c963b 100644
--- a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
+++ b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt
@@ -9,6 +9,8 @@ Required properties:
"fsl,imx53-sdma"
"fsl,imx6q-sdma"
"fsl,imx7d-sdma"
+ "fsl,imx6sx-sdma"
+ "fsl,imx6ul-sdma"
"fsl,imx8mq-sdma"
"fsl,imx8mm-sdma"
"fsl,imx8mn-sdma"
--
2.7.4

2020-03-10 03:32:46

by Robin Gong

Subject: [RESEND v6 03/13] Revert "dmaengine: imx-sdma: refine to load context only once"

This reverts commit ad0d92d7ba6aecbe2705907c38ff8d8be4da1e9c, because
in spi-imx case, burst length may be changed dynamically.

Signed-off-by: Robin Gong <[email protected]>
---
drivers/dma/imx-sdma.c | 7 -------
1 file changed, 7 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 4d4477d..4c11c38 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -377,7 +377,6 @@ struct sdma_channel {
unsigned long watermark_level;
u32 shp_addr, per_addr;
enum dma_status status;
- bool context_loaded;
struct imx_dma_data data;
struct work_struct terminate_worker;
};
@@ -984,9 +983,6 @@ static int sdma_load_context(struct sdma_channel *sdmac)
int ret;
unsigned long flags;

- if (sdmac->context_loaded)
- return 0;
-
if (sdmac->direction == DMA_DEV_TO_MEM)
load_address = sdmac->pc_from_device;
else if (sdmac->direction == DMA_DEV_TO_DEV)
@@ -1029,8 +1025,6 @@ static int sdma_load_context(struct sdma_channel *sdmac)

spin_unlock_irqrestore(&sdma->channel_0_lock, flags);

- sdmac->context_loaded = true;
-
return ret;
}

@@ -1069,7 +1063,6 @@ static void sdma_channel_terminate_work(struct work_struct *work)
vchan_get_all_descriptors(&sdmac->vc, &head);
spin_unlock_irqrestore(&sdmac->vc.lock, flags);
vchan_dma_desc_free_list(&sdmac->vc, &head);
- sdmac->context_loaded = false;
}

static int sdma_terminate_all(struct dma_chan *chan)
--
2.7.4

2020-03-10 03:33:15

by Robin Gong

Subject: [RESEND v6 08/13] spi: imx: add new i.mx6ul compatible name in binding doc

ERR009165 fixed from i.mx6ul, add its compatible name in binding doc.

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Mark Brown <[email protected]>
---
Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt | 1 +
1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
index 33bc58f..0a529ba 100644
--- a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
+++ b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
@@ -10,6 +10,7 @@ Required properties:
- "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
- "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
- "fsl,imx53-ecspi" for SPI compatible with the one integrated on i.MX53 and later Soc
+ - "fsl,imx6ul-ecspi" for SPI compatible with the one integrated on i.MX6UL and later Soc
- "fsl,imx8mq-ecspi" for SPI compatible with the one integrated on i.MX8MQ
- "fsl,imx8mm-ecspi" for SPI compatible with the one integrated on i.MX8MM
- "fsl,imx8mn-ecspi" for SPI compatible with the one integrated on i.MX8MN
--
2.7.4

2020-03-10 03:33:39

by Robin Gong

Subject: [RESEND v6 11/13] dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm

Because the number of ecspi1 rx event on i.mx8mm is 0, the condition
check ignore such special case without dma channel enabled, which caused
ecspi1 rx works failed. Actually, no need to check event_id0/event_id1
and replace checking 'event_id1' with 'DMA_DEV_TO_DEV', so that configure
event_id1 only in case DEV_TO_DEV.

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Vinod Koul <[email protected]>
---
drivers/dma/imx-sdma.c | 18 ++++++++----------
1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 5ae7237..4a6256e 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1205,7 +1205,7 @@ static int sdma_config_channel(struct dma_chan *chan)
if ((sdmac->peripheral_type != IMX_DMATYPE_MEMORY) &&
(sdmac->peripheral_type != IMX_DMATYPE_DSP)) {
/* Handle multiple event channels differently */
- if (sdmac->event_id1) {
+ if (sdmac->direction == DMA_DEV_TO_DEV) {
if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP ||
sdmac->peripheral_type == IMX_DMATYPE_ASRC)
sdma_set_watermarklevel_for_p2p(sdmac);
@@ -1373,9 +1373,9 @@ static void sdma_free_chan_resources(struct dma_chan *chan)

sdma_channel_synchronize(chan);

- if (sdmac->event_id0 >= 0)
- sdma_event_disable(sdmac, sdmac->event_id0);
- if (sdmac->event_id1)
+ sdma_event_disable(sdmac, sdmac->event_id0);
+
+ if (sdmac->direction == DMA_DEV_TO_DEV)
sdma_event_disable(sdmac, sdmac->event_id1);

sdmac->event_id0 = 0;
@@ -1674,13 +1674,11 @@ static int sdma_config(struct dma_chan *chan,
memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg));

/* Set ENBLn earlier to make sure dma request triggered after that */
- if (sdmac->event_id0 >= 0) {
- if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
- return -EINVAL;
- sdma_event_enable(sdmac, sdmac->event_id0);
- }
+ if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
+ return -EINVAL;
+ sdma_event_enable(sdmac, sdmac->event_id0);

- if (sdmac->event_id1) {
+ if (sdmac->direction == DMA_DEV_TO_DEV) {
if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events)
return -EINVAL;
sdma_event_enable(sdmac, sdmac->event_id1);
--
2.7.4

2020-03-10 03:33:45

by Robin Gong

Subject: [RESEND v6 12/13] dmaengine: imx-sdma: add uart rom script

For the compatibility of NXP internal legacy kernel before 4.19 which
is based on uart ram script and upstreaming kernel based on uart rom
script, add both uart ram/rom script in latest sdma firmware. By default
uart rom script used.
Besides, add two multi-fifo scripts for SAI/PDM on i.mx8m/8mm and add
back qspi script miss for v4(i.mx7d/8m/8mm family, but v3 is for i.mx6).

rom script:
uart_2_mcu_addr
uartsh_2_mcu_addr /* through spba bus */
am script:
uart_2_mcu_ram_addr
uartsh_2_mcu_ram_addr /* through spba bus */

Please get latest sdma firmware from the below and put them into the path
(/lib/firmware/imx/sdma/):
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
/tree/imx/sdma

Signed-off-by: Robin Gong <[email protected]>
Acked-by: Vinod Koul <[email protected]>
---
drivers/dma/imx-sdma.c | 4 ++--
include/linux/platform_data/dma-imx-sdma.h | 8 ++++++--
2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 4a6256e..042cfbf 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1741,8 +1741,8 @@ static void sdma_issue_pending(struct dma_chan *chan)

#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1 34
#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V2 38
-#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 41
-#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4 42
+#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3 45
+#define SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V4 46

static void sdma_add_scripts(struct sdma_engine *sdma,
const struct sdma_script_start_addrs *addr)
diff --git a/include/linux/platform_data/dma-imx-sdma.h b/include/linux/platform_data/dma-imx-sdma.h
index 30e676b..e12d2e8 100644
--- a/include/linux/platform_data/dma-imx-sdma.h
+++ b/include/linux/platform_data/dma-imx-sdma.h
@@ -20,12 +20,12 @@ struct sdma_script_start_addrs {
s32 per_2_firi_addr;
s32 mcu_2_firi_addr;
s32 uart_2_per_addr;
- s32 uart_2_mcu_addr;
+ s32 uart_2_mcu_ram_addr;
s32 per_2_app_addr;
s32 mcu_2_app_addr;
s32 per_2_per_addr;
s32 uartsh_2_per_addr;
- s32 uartsh_2_mcu_addr;
+ s32 uartsh_2_mcu_ram_addr;
s32 per_2_shp_addr;
s32 mcu_2_shp_addr;
s32 ata_2_mcu_addr;
@@ -52,6 +52,10 @@ struct sdma_script_start_addrs {
s32 zcanfd_2_mcu_addr;
s32 zqspi_2_mcu_addr;
s32 mcu_2_ecspi_addr;
+ s32 mcu_2_sai_addr;
+ s32 sai_2_mcu_addr;
+ s32 uart_2_mcu_addr;
+ s32 uartsh_2_mcu_addr;
/* End of v3 array */
s32 mcu_2_zqspi_addr;
/* End of v4 array */
--
2.7.4

2020-03-10 03:33:47

by Robin Gong

Subject: [RESEND v6 13/13] Revert "dmaengine: imx-sdma: fix context cache"

This reverts commit d288bddd8374e0a043ac9dde64a1ae6a09411d74, since
'context_loaded' finally removed.

Signed-off-by: Robin Gong <[email protected]>
---
drivers/dma/imx-sdma.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 042cfbf..1abe4bd 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1380,7 +1380,6 @@ static void sdma_free_chan_resources(struct dma_chan *chan)

sdmac->event_id0 = 0;
sdmac->event_id1 = 0;
- sdmac->context_loaded = false;

sdma_set_channel_priority(sdmac, 0);

--
2.7.4

2020-03-10 07:40:23

by Sascha Hauer

Subject: Re: [RESEND v6 06/13] spi: imx: fix ERR009165

On Tue, Mar 10, 2020 at 07:31:55PM +0800, Robin Gong wrote:
> Change to XCH mode even in dma mode, please refer to the below
> errata:
> https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
>
> Signed-off-by: Robin Gong <[email protected]>
> Acked-by: Mark Brown <[email protected]>
> ---
> drivers/spi/spi-imx.c | 17 ++++++++++-------
> 1 file changed, 10 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
> index f4f28a4..842a86e 100644
> --- a/drivers/spi/spi-imx.c
> +++ b/drivers/spi/spi-imx.c
> @@ -585,8 +585,9 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
> ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
> spi_imx->spi_bus_clk = clk;
>
> + /* ERR009165: work in XHC mode as PIO */
> if (spi_imx->usedma)
> - ctrl |= MX51_ECSPI_CTRL_SMC;
> + ctrl &= ~MX51_ECSPI_CTRL_SMC;

'ctrl' was read from the hardware. In the dma case it was set
explicitly, but it was never cleared for a PIO transfer. This looked
wrong before this patch. Now with this patch it looks even more wrong:
We clear a bit that has never been set and we only do this for DMA, when
for the PIO case it definitly must be cleared. Drop the if clause.

>
> writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
>
> @@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
>
> static void mx51_setup_wml(struct spi_imx_data *spi_imx)
> {
> + u32 tx_wml = 0;
> +
> /*
> * Configure the DMA register: setup the watermark
> * and enable DMA request.
> */
> writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) |
> - MX51_ECSPI_DMA_TX_WML(spi_imx->wml) |
> + MX51_ECSPI_DMA_TX_WML(tx_wml) |

tx_wml is never assigned any other value than 0. Drop the variable.

> MX51_ECSPI_DMA_RXT_WML(spi_imx->wml) |
> MX51_ECSPI_DMA_TEDEN | MX51_ECSPI_DMA_RXDEN |
> MX51_ECSPI_DMA_RXTDEN, spi_imx->base + MX51_ECSPI_DMA);
> @@ -1171,7 +1174,11 @@ static int spi_imx_dma_configure(struct spi_master *master)
> tx.direction = DMA_MEM_TO_DEV;
> tx.dst_addr = spi_imx->base_phys + MXC_CSPITXDATA;
> tx.dst_addr_width = buswidth;
> - tx.dst_maxburst = spi_imx->wml;
> + /*
> + * For ERR009165 with tx_wml = 0 could enlarge burst size to fifo size
> + * to speed up fifo filling as possible.
> + */
> + tx.dst_maxburst = spi_imx->devtype_data->fifo_size;
> ret = dmaengine_slave_config(master->dma_tx, &tx);
> if (ret) {
> dev_err(spi_imx->dev, "TX dma configuration failed with %d\n", ret);
> @@ -1265,10 +1272,6 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
> {
> int ret;
>
> - /* use pio mode for i.mx6dl chip TKT238285 */
> - if (of_machine_is_compatible("fsl,imx6dl"))
> - return 0;

So with this patch it becomes possible to do DMA on i.MX6dl, but it is
mentioned nowhere.

Sascha

--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

2020-03-10 08:03:39

by Sascha Hauer

Subject: Re: [RESEND v6 07/13] spi: imx: remove ERR009165 workaround on i.mx6ul

On Tue, Mar 10, 2020 at 07:31:56PM +0800, Robin Gong wrote:
> ERR009165 fixed on i.mx6ul/6ull/6sll. All other i.mx6/7 and
> i.mx8m/8mm still need this errata. Please refer to nxp official
> errata document from https://www.nxp.com/ .
>
> For removing workaround on those chips. Add new i.mx6ul type.
>
> Signed-off-by: Robin Gong <[email protected]>
> Acked-by: Mark Brown <[email protected]>
> ---
> drivers/spi/spi-imx.c | 50 +++++++++++++++++++++++++++++++++++++++++++++-----
> 1 file changed, 45 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
> index 842a86e..f7ee2ec 100644
> --- a/drivers/spi/spi-imx.c
> +++ b/drivers/spi/spi-imx.c
> @@ -57,6 +57,7 @@ enum spi_imx_devtype {
> IMX35_CSPI, /* CSPI on all i.mx except above */
> IMX51_ECSPI, /* ECSPI on i.mx51 */
> IMX53_ECSPI, /* ECSPI on i.mx53 and later */
> + IMX6UL_ECSPI, /* ERR009165 fix from i.mx6ul */
> };
>
> struct spi_imx_data;
> @@ -75,6 +76,11 @@ struct spi_imx_devtype_data {
> bool has_slavemode;
> unsigned int fifo_size;
> bool dynamic_burst;
> + /*
> + * ERR009165 fixed or not:
> + * https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
> + */
> + bool tx_glitch_fixed;
> enum spi_imx_devtype devtype;
> };
>
> @@ -128,7 +134,8 @@ static inline int is_imx35_cspi(struct spi_imx_data *d)
>
> static inline int is_imx51_ecspi(struct spi_imx_data *d)
> {
> - return d->devtype_data->devtype == IMX51_ECSPI;
> + return d->devtype_data->devtype == IMX51_ECSPI ||
> + d->devtype_data->devtype == IMX6UL_ECSPI;
> }

Erm, no. A i.MX51 ECSPI is a i.MX51 ECSPI and not a i.MX6UL ECSPI. If
you want to handle them equally somewhere then explicitly test for
i.MX6ul *and* i.MX51 there.

>
> static inline int is_imx53_ecspi(struct spi_imx_data *d)
> @@ -585,9 +592,16 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
> ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
> spi_imx->spi_bus_clk = clk;
>
> - /* ERR009165: work in XHC mode as PIO */
> - if (spi_imx->usedma)
> - ctrl &= ~MX51_ECSPI_CTRL_SMC;
> + /*
> + * ERR009165: work in XHC mode instead of SMC as PIO on the chips
> + * before i.mx6ul.
> + */
> + if (spi_imx->usedma) {
> + if (spi_imx->devtype_data->tx_glitch_fixed)
> + ctrl |= MX51_ECSPI_CTRL_SMC;
> + else
> + ctrl &= ~MX51_ECSPI_CTRL_SMC;
> + }

Changed again, but the PIO case still not honoured. This should look
like
if (spi_imx->usedma && spi_imx->devtype_data->tx_glitch_fixed)
ctrl |= MX51_ECSPI_CTRL_SMC;
else
ctrl &= ~MX51_ECSPI_CTRL_SMC;

>
> writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
>
> @@ -615,6 +629,8 @@ static void mx51_setup_wml(struct spi_imx_data *spi_imx)
> {
> u32 tx_wml = 0;
>
> + if (spi_imx->devtype_data->tx_glitch_fixed)
> + tx_wml = spi_imx->wml;

That explains the variable introduced in the last patch, ok.

I have the impression that splitting up 06/13 and 07/13 into two patches
doesn't make it easier to review.

Sascha


--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

2020-03-10 08:21:23

by Sascha Hauer

Subject: Re: [RESEND v6 09/13] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

On Tue, Mar 10, 2020 at 07:31:58PM +0800, Robin Gong wrote:
> ECSPI issue fixed from i.mx6ul at hardware level, no need
> ERR009165 anymore on those chips such as i.mx8mq. Add i.mx6sx
> from where i.mx6ul source.
>
> Signed-off-by: Robin Gong <[email protected]>
> Acked-by: Vinod Koul <[email protected]>
> ---
> drivers/dma/imx-sdma.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 50 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 56288d8..5ae7237 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -419,6 +419,13 @@ struct sdma_driver_data {
> int num_events;
> struct sdma_script_start_addrs *script_addrs;
> bool check_ratio;
> + /*
> + * ecspi ERR009165 fixed should be done in sdma script
> + * and it has been fixed in soc from i.mx6ul.
> + * please get more information from the below link:
> + * https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf
> + */
> + bool ecspi_fixed;
> };
>
> struct sdma_engine {
> @@ -539,6 +546,31 @@ static struct sdma_driver_data sdma_imx6q = {
> .script_addrs = &sdma_script_imx6q,
> };
>
> +static struct sdma_script_start_addrs sdma_script_imx6sx = {
> + .ap_2_ap_addr = 642,
> + .uart_2_mcu_addr = 817,
> + .mcu_2_app_addr = 747,
> + .uartsh_2_mcu_addr = 1032,
> + .mcu_2_shp_addr = 960,
> + .app_2_mcu_addr = 683,
> + .shp_2_mcu_addr = 891,
> + .spdif_2_mcu_addr = 1100,
> + .mcu_2_spdif_addr = 1134,
> +};
> +
> +static struct sdma_driver_data sdma_imx6sx = {
> + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> + .num_events = 48,
> + .script_addrs = &sdma_script_imx6sx,
> +};
> +
> +static struct sdma_driver_data sdma_imx6ul = {
> + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> + .num_events = 48,
> + .script_addrs = &sdma_script_imx6sx,
> + .ecspi_fixed = true,
> +};
> +
> static struct sdma_script_start_addrs sdma_script_imx7d = {
> .ap_2_ap_addr = 644,
> .uart_2_mcu_addr = 819,
> @@ -584,9 +616,15 @@ static const struct platform_device_id sdma_devtypes[] = {
> .name = "imx6q-sdma",
> .driver_data = (unsigned long)&sdma_imx6q,
> }, {
> + .name = "imx6sx-sdma",
> + .driver_data = (unsigned long)&sdma_imx6sx,
> + }, {

Now the i.MX6sx uses a new sdma_script_start_addrs entry which is the same
as the i.MX6q one we used before with one exception: it lacks the
per_2_per_addr = 6331 entry. This is only used for IMX_DMATYPE_ASRC and
IMX_DMATYPE_ASRC_SP, both are entirely unused in the mainline kernel. So
why must the i.MX6sx changed here and what has this to do with ECSPI?

Sascha

> .name = "imx7d-sdma",
> .driver_data = (unsigned long)&sdma_imx7d,
> }, {
> + .name = "imx6ul-sdma",
> + .driver_data = (unsigned long)&sdma_imx6ul,
> + }, {
> .name = "imx8mq-sdma",
> .driver_data = (unsigned long)&sdma_imx8mq,
> }, {
> @@ -602,7 +640,9 @@ static const struct of_device_id sdma_dt_ids[] = {
> { .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, },
> { .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
> { .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, },
> + { .compatible = "fsl,imx6sx-sdma", .data = &sdma_imx6sx, },
> { .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, },
> + { .compatible = "fsl,imx6ul-sdma", .data = &sdma_imx6ul, },
> { .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx8mq, },
> { /* sentinel */ }
> };
> @@ -1169,8 +1209,17 @@ static int sdma_config_channel(struct dma_chan *chan)
> if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP ||
> sdmac->peripheral_type == IMX_DMATYPE_ASRC)
> sdma_set_watermarklevel_for_p2p(sdmac);
> - } else
> + } else {
> + /*
> + * ERR009165 fixed from i.mx6ul, no errata need,
> + * set bit31 to let sdma script skip the errata.
> + */
> + if (sdmac->peripheral_type == IMX_DMATYPE_CSPI &&
> + sdmac->direction == DMA_MEM_TO_DEV &&
> + sdmac->sdma->drvdata->ecspi_fixed)
> + __set_bit(31, &sdmac->watermark_level);
> __set_bit(sdmac->event_id0, sdmac->event_mask);
> + }
>
> /* Address */
> sdmac->shp_addr = sdmac->per_address;
> --
> 2.7.4
>
>

--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

2020-03-10 08:29:40

by Robin Gong

Subject: RE: [RESEND v6 06/13] spi: imx: fix ERR009165

On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> On Tue, Mar 10, 2020 at 07:31:55PM +0800, Robin Gong wrote:
> > Change to XCH mode even in dma mode, please refer to the below
> > errata:
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.
> >
> nxp.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7C
> yibin.g
> >
> ong%40nxp.com%7Ccbabce268dfd4b0a0e2a08d7c4c62ff6%7C686ea1d3bc2b4c
> 6fa92
> >
> cd99c5c301635%7C0%7C1%7C637194227793913712&amp;sdata=Q5N49T4jgX
> TcdTzsB
> > 3D0saK2%2Fzj0R4gnJcGR%2Bd70Fm4%3D&amp;reserved=0
> >
> > Signed-off-by: Robin Gong <[email protected]>
> > Acked-by: Mark Brown <[email protected]>
> > ---
> > drivers/spi/spi-imx.c | 17 ++++++++++-------
> > 1 file changed, 10 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index
> > f4f28a4..842a86e 100644
> > --- a/drivers/spi/spi-imx.c
> > +++ b/drivers/spi/spi-imx.c
> > @@ -585,8 +585,9 @@ static int mx51_ecspi_prepare_transfer(struct
> spi_imx_data *spi_imx,
> > ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
> > spi_imx->spi_bus_clk = clk;
> >
> > + /* ERR009165: work in XHC mode as PIO */
> > if (spi_imx->usedma)
> > - ctrl |= MX51_ECSPI_CTRL_SMC;
> > + ctrl &= ~MX51_ECSPI_CTRL_SMC;
>
> 'ctrl' was read from the hardware. In the dma case it was set explicitly, but it
> was never cleared for a PIO transfer. This looked wrong before this patch. Now
> with this patch it looks even more wrong:
> We clear a bit that has never been set and we only do this for DMA, when for
> the PIO case it definitly must be cleared. Drop the if clause.
Good point, ACK.
>
> >
> > writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
> >
> > @@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct
> > spi_imx_data *spi_imx,
> >
> > static void mx51_setup_wml(struct spi_imx_data *spi_imx) {
> > + u32 tx_wml = 0;
> > +
> > /*
> > * Configure the DMA register: setup the watermark
> > * and enable DMA request.
> > */
> > writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) |
> > - MX51_ECSPI_DMA_TX_WML(spi_imx->wml) |
> > + MX51_ECSPI_DMA_TX_WML(tx_wml) |
>
> tx_wml is never assigned any other value than 0. Drop the variable.
That's prepared for 07/13 patch which may assign spi_imx->wml to tx_wml.
>
> > MX51_ECSPI_DMA_RXT_WML(spi_imx->wml) |
> > MX51_ECSPI_DMA_TEDEN | MX51_ECSPI_DMA_RXDEN |
> > MX51_ECSPI_DMA_RXTDEN, spi_imx->base + MX51_ECSPI_DMA);
> @@ -1171,7
> > +1174,11 @@ static int spi_imx_dma_configure(struct spi_master *master)
> > tx.direction = DMA_MEM_TO_DEV;
> > tx.dst_addr = spi_imx->base_phys + MXC_CSPITXDATA;
> > tx.dst_addr_width = buswidth;
> > - tx.dst_maxburst = spi_imx->wml;
> > + /*
> > + * For ERR009165 with tx_wml = 0 could enlarge burst size to fifo size
> > + * to speed up fifo filling as possible.
> > + */
> > + tx.dst_maxburst = spi_imx->devtype_data->fifo_size;
> > ret = dmaengine_slave_config(master->dma_tx, &tx);
> > if (ret) {
> > dev_err(spi_imx->dev, "TX dma configuration failed with %d\n",
> > ret); @@ -1265,10 +1272,6 @@ static int spi_imx_sdma_init(struct
> > device *dev, struct spi_imx_data *spi_imx, {
> > int ret;
> >
> > - /* use pio mode for i.mx6dl chip TKT238285 */
> > - if (of_machine_is_compatible("fsl,imx6dl"))
> > - return 0;
>
> So with this patch it becomes possible to do DMA on i.MX6dl, but it is
> mentioned nowhere.
That's a common IP issue but caught on i.mx6dl at that time, so this time I didn't mention
i.mx6dl.
>
> Sascha
>
> --
> Pengutronix e.K. |
> |
> Steuerwalder Str. 21 |
> https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pe
> ngutronix.de%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7Ccbabce2
> 68dfd4b0a0e2a08d7c4c62ff6%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%
> 7C1%7C637194227793913712&amp;sdata=TL%2BheiNsYVPld3qyzWjF6yQZgH2
> HLdVFxzFeK3MupTc%3D&amp;reserved=0 |
> 31137 Hildesheim, Germany | Phone: +49-5121-206917-0
> |
> Amtsgericht Hildesheim, HRA 2686 | Fax:
> +49-5121-206917-5555 |

2020-03-10 08:38:55

by Uwe Kleine-König

Subject: Re: [RESEND v6 06/13] spi: imx: fix ERR009165

Hello,

On Tue, Mar 10, 2020 at 08:27:41AM +0000, Robin Gong wrote:
> On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> > On Tue, Mar 10, 2020 at 07:31:55PM +0800, Robin Gong wrote:
> > > writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
> > >
> > > @@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct
> > > spi_imx_data *spi_imx,
> > >
> > > static void mx51_setup_wml(struct spi_imx_data *spi_imx) {
> > > + u32 tx_wml = 0;
> > > +
> > > /*
> > > * Configure the DMA register: setup the watermark
> > > * and enable DMA request.
> > > */
> > > writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) |
> > > - MX51_ECSPI_DMA_TX_WML(spi_imx->wml) |
> > > + MX51_ECSPI_DMA_TX_WML(tx_wml) |
> >
> > tx_wml is never assigned any other value than 0. Drop the variable.
> That's prepared for 07/13 patch which may assign spi_imx->wml to tx_wml.

Then this belongs into patch 7, right?

Best regards
Uwe

--
Pengutronix e.K. | Uwe Kleine-K?nig |
Industrial Linux Solutions | https://www.pengutronix.de/ |

2020-03-10 08:44:12

by Robin Gong

Subject: RE: [RESEND v6 07/13] spi: imx: remove ERR009165 workaround on i.mx6ul

On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> On Tue, Mar 10, 2020 at 07:31:56PM +0800, Robin Gong wrote:
> > ERR009165 fixed on i.mx6ul/6ull/6sll. All other i.mx6/7 and i.mx8m/8mm
> > still need this errata. Please refer to nxp official errata document
> > from
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nx
> p.com%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7Cf73bfc11a68c4
> 2f5f6d308d7c4c96efa%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C
> 637194241755109112&amp;sdata=xzIUP8qZkrlDXX0yjTcUNZB6zDrevTdHFg1o4
> PZZd8E%3D&amp;reserved=0 .
> >
> > For removing workaround on those chips. Add new i.mx6ul type.
> >
> > Signed-off-by: Robin Gong <[email protected]>
> > Acked-by: Mark Brown <[email protected]>
> > ---
> > drivers/spi/spi-imx.c | 50
> > +++++++++++++++++++++++++++++++++++++++++++++-----
> > 1 file changed, 45 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index
> > 842a86e..f7ee2ec 100644
> > --- a/drivers/spi/spi-imx.c
> > +++ b/drivers/spi/spi-imx.c
> > @@ -57,6 +57,7 @@ enum spi_imx_devtype {
> > IMX35_CSPI, /* CSPI on all i.mx except above */
> > IMX51_ECSPI, /* ECSPI on i.mx51 */
> > IMX53_ECSPI, /* ECSPI on i.mx53 and later */
> > + IMX6UL_ECSPI, /* ERR009165 fix from i.mx6ul */
> > };
> >
> > struct spi_imx_data;
> > @@ -75,6 +76,11 @@ struct spi_imx_devtype_data {
> > bool has_slavemode;
> > unsigned int fifo_size;
> > bool dynamic_burst;
> > + /*
> > + * ERR009165 fixed or not:
> > + *
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nx
> p.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7Cyi
> bin.gong%40nxp.com%7Cf73bfc11a68c42f5f6d308d7c4c96efa%7C686ea1d3bc
> 2b4c6fa92cd99c5c301635%7C0%7C1%7C637194241755109112&amp;sdata=m
> uw4HL5nMDjREJwVd885Wrxka0moMaaZ%2BhJgsAgY3eo%3D&amp;reserved=
> 0
> > + */
> > + bool tx_glitch_fixed;
> > enum spi_imx_devtype devtype;
> > };
> >
> > @@ -128,7 +134,8 @@ static inline int is_imx35_cspi(struct
> > spi_imx_data *d)
> >
> > static inline int is_imx51_ecspi(struct spi_imx_data *d) {
> > - return d->devtype_data->devtype == IMX51_ECSPI;
> > + return d->devtype_data->devtype == IMX51_ECSPI ||
> > + d->devtype_data->devtype == IMX6UL_ECSPI;
> > }
>
> Erm, no. A i.MX51 ECSPI is a i.MX51 ECSPI and not a i.MX6UL ECSPI. If you want
> to handle them equally somewhere then explicitly test for i.MX6ul *and*
> i.MX51 there.
But all i.mx6 chips including i.MX53 ECSPI are almost same as i.MX51 ECSPI, and ERR00915 is fixed from i.mx6ul....
>
> >
> > static inline int is_imx53_ecspi(struct spi_imx_data *d) @@ -585,9
> > +592,16 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data
> *spi_imx,
> > ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk);
> > spi_imx->spi_bus_clk = clk;
> >
> > - /* ERR009165: work in XHC mode as PIO */
> > - if (spi_imx->usedma)
> > - ctrl &= ~MX51_ECSPI_CTRL_SMC;
> > + /*
> > + * ERR009165: work in XHC mode instead of SMC as PIO on the chips
> > + * before i.mx6ul.
> > + */
> > + if (spi_imx->usedma) {
> > + if (spi_imx->devtype_data->tx_glitch_fixed)
> > + ctrl |= MX51_ECSPI_CTRL_SMC;
> > + else
> > + ctrl &= ~MX51_ECSPI_CTRL_SMC;
> > + }
>
> Changed again, but the PIO case still not honoured. This should look like
> if (spi_imx->usedma && spi_imx->devtype_data->tx_glitch_fixed)
> ctrl |= MX51_ECSPI_CTRL_SMC;
> else
> ctrl &= ~MX51_ECSPI_CTRL_SMC;
>
Okay, will fix in v7.
> >
> > writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
> >
> > @@ -615,6 +629,8 @@ static void mx51_setup_wml(struct spi_imx_data
> > *spi_imx) {
> > u32 tx_wml = 0;
> >
> > + if (spi_imx->devtype_data->tx_glitch_fixed)
> > + tx_wml = spi_imx->wml;
>
> That explains the variable introduced in the last patch, ok.
>
> I have the impression that splitting up 06/13 and 07/13 into two patches
> doesn't make it easier to review.
But 06 is a errata for all i.mx6 legacy chips, while 07 is for i.mx6ul and newer chips which have been already fixed the HW issue. I think two patches are better.
>
> Sascha
>
>
> --
> Pengutronix e.K. |
> |
> Steuerwalder Str. 21 |
> https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pe
> ngutronix.de%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7Cf73bfc11
> a68c42f5f6d308d7c4c96efa%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7
> C1%7C637194241755114106&amp;sdata=DKe%2B2SynMv%2Be3rMBrO79ou6
> 5ADTwO03KRT%2FqsDbCWjc%3D&amp;reserved=0 |
> 31137 Hildesheim, Germany | Phone: +49-5121-206917-0
> |
> Amtsgericht Hildesheim, HRA 2686 | Fax:
> +49-5121-206917-5555 |

2020-03-10 09:00:00

by Robin Gong

Subject: RE: [RESEND v6 09/13] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> On Tue, Mar 10, 2020 at 07:31:58PM +0800, Robin Gong wrote:
> > ECSPI issue fixed from i.mx6ul at hardware level, no need
> > ERR009165 anymore on those chips such as i.mx8mq. Add i.mx6sx from
> > where i.mx6ul source.
> >
> > Signed-off-by: Robin Gong <[email protected]>
> > Acked-by: Vinod Koul <[email protected]>
> > ---
> > drivers/dma/imx-sdma.c | 51
> > +++++++++++++++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 50 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index
> > 56288d8..5ae7237 100644
> > --- a/drivers/dma/imx-sdma.c
> > +++ b/drivers/dma/imx-sdma.c
> > @@ -419,6 +419,13 @@ struct sdma_driver_data {
> > int num_events;
> > struct sdma_script_start_addrs *script_addrs;
> > bool check_ratio;
> > + /*
> > + * ecspi ERR009165 fixed should be done in sdma script
> > + * and it has been fixed in soc from i.mx6ul.
> > + * please get more information from the below link:
> > + *
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nx
> p.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7Cyi
> bin.gong%40nxp.com%7C91d42046e6894501d48508d7c4cbcae2%7C686ea1d3
> bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637194251876090170&amp;sdata=
> T6LA4xz9CUFlNpnyjHSThEQb8i1rhbY9e1nUyxIGD5Q%3D&amp;reserved=0
> > + */
> > + bool ecspi_fixed;
> > };
> >
> > struct sdma_engine {
> > @@ -539,6 +546,31 @@ static struct sdma_driver_data sdma_imx6q = {
> > .script_addrs = &sdma_script_imx6q,
> > };
> >
> > +static struct sdma_script_start_addrs sdma_script_imx6sx = {
> > + .ap_2_ap_addr = 642,
> > + .uart_2_mcu_addr = 817,
> > + .mcu_2_app_addr = 747,
> > + .uartsh_2_mcu_addr = 1032,
> > + .mcu_2_shp_addr = 960,
> > + .app_2_mcu_addr = 683,
> > + .shp_2_mcu_addr = 891,
> > + .spdif_2_mcu_addr = 1100,
> > + .mcu_2_spdif_addr = 1134,
> > +};
> > +
> > +static struct sdma_driver_data sdma_imx6sx = {
> > + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> > + .num_events = 48,
> > + .script_addrs = &sdma_script_imx6sx, };
> > +
> > +static struct sdma_driver_data sdma_imx6ul = {
> > + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> > + .num_events = 48,
> > + .script_addrs = &sdma_script_imx6sx,
> > + .ecspi_fixed = true,
> > +};
> > +
> > static struct sdma_script_start_addrs sdma_script_imx7d = {
> > .ap_2_ap_addr = 644,
> > .uart_2_mcu_addr = 819,
> > @@ -584,9 +616,15 @@ static const struct platform_device_id
> sdma_devtypes[] = {
> > .name = "imx6q-sdma",
> > .driver_data = (unsigned long)&sdma_imx6q,
> > }, {
> > + .name = "imx6sx-sdma",
> > + .driver_data = (unsigned long)&sdma_imx6sx,
> > + }, {
>
> Now the i.MX6sx uses a new sdma_script_start_addrs entry which is the same
> as the i.MX6q one we used before with one exception: it lacks the
> per_2_per_addr = 6331 entry. This is only used for IMX_DMATYPE_ASRC and
Totally same script for i.mx6 chips whatever i.MX6sx, i.MX6q or i.MX6ul.
> IMX_DMATYPE_ASRC_SP, both are entirely unused in the mainline kernel. So
> why must the i.MX6sx changed here and what has this to do with ECSPI?
i.MX6ul is based on i.MX6sx, so adding i.MX6sx could keep good shape on our i.MX family evolution.
>
> Sascha
>
> > .name = "imx7d-sdma",
> > .driver_data = (unsigned long)&sdma_imx7d,
> > }, {
> > + .name = "imx6ul-sdma",
> > + .driver_data = (unsigned long)&sdma_imx6ul,
> > + }, {
> > .name = "imx8mq-sdma",
> > .driver_data = (unsigned long)&sdma_imx8mq,
> > }, {
> > @@ -602,7 +640,9 @@ static const struct of_device_id sdma_dt_ids[] = {
> > { .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, },
> > { .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
> > { .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, },
> > + { .compatible = "fsl,imx6sx-sdma", .data = &sdma_imx6sx, },
> > { .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, },
> > + { .compatible = "fsl,imx6ul-sdma", .data = &sdma_imx6ul, },
> > { .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx8mq, },
> > { /* sentinel */ }
> > };
> > @@ -1169,8 +1209,17 @@ static int sdma_config_channel(struct dma_chan
> *chan)
> > if (sdmac->peripheral_type == IMX_DMATYPE_ASRC_SP ||
> > sdmac->peripheral_type == IMX_DMATYPE_ASRC)
> > sdma_set_watermarklevel_for_p2p(sdmac);
> > - } else
> > + } else {
> > + /*
> > + * ERR009165 fixed from i.mx6ul, no errata need,
> > + * set bit31 to let sdma script skip the errata.
> > + */
> > + if (sdmac->peripheral_type == IMX_DMATYPE_CSPI &&
> > + sdmac->direction == DMA_MEM_TO_DEV &&
> > + sdmac->sdma->drvdata->ecspi_fixed)
> > + __set_bit(31, &sdmac->watermark_level);
> > __set_bit(sdmac->event_id0, sdmac->event_mask);
> > + }
> >
> > /* Address */
> > sdmac->shp_addr = sdmac->per_address;
> > --
> > 2.7.4
> >
> >
>
> --
> Pengutronix e.K. |
> |
> Steuerwalder Str. 21 |
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> %7C1%7C637194251876090170&amp;sdata=d0X1DBm%2Fc0lwcHVUtTW0ITw
> o5qW3SKtVd5Va0EVVw3E%3D&amp;reserved=0 |
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> |
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2020-03-10 09:03:38

by Robin Gong

Subject: RE: [RESEND v6 06/13] spi: imx: fix ERR009165

On 2020/03/10 Uwe Kleine-K?nig <[email protected]> wrote:
>
> Hello,
>
> On Tue, Mar 10, 2020 at 08:27:41AM +0000, Robin Gong wrote:
> > On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> > > On Tue, Mar 10, 2020 at 07:31:55PM +0800, Robin Gong wrote:
> > > > writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL);
> > > >
> > > > @@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct
> > > > spi_imx_data *spi_imx,
> > > >
> > > > static void mx51_setup_wml(struct spi_imx_data *spi_imx) {
> > > > + u32 tx_wml = 0;
> > > > +
> > > > /*
> > > > * Configure the DMA register: setup the watermark
> > > > * and enable DMA request.
> > > > */
> > > > writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) |
> > > > - MX51_ECSPI_DMA_TX_WML(spi_imx->wml) |
> > > > + MX51_ECSPI_DMA_TX_WML(tx_wml) |
> > >
> > > tx_wml is never assigned any other value than 0. Drop the variable.
> > That's prepared for 07/13 patch which may assign spi_imx->wml to tx_wml.
>
> Then this belongs into patch 7, right?
Okay, understood your concern. Then I'll drop tx_wml to make it clear.
>
> Best regards
> Uwe
>
> --
> Pengutronix e.K. | Uwe Kleine-K?nig
> |
> Industrial Linux Solutions |
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.p
> engutronix.de%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7Cca6f14
> 28f4224fa79f1d08d7c4ce4a41%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0
> %7C0%7C637194262606339591&amp;sdata=kI9HAyC%2FG3qmrIrLmfUDJ7dac
> %2FOEDBtDm4oeRyak1xE%3D&amp;reserved=0 |

2020-03-10 09:26:32

by Sascha Hauer

Subject: Re: [RESEND v6 07/13] spi: imx: remove ERR009165 workaround on i.mx6ul

On Tue, Mar 10, 2020 at 08:43:10AM +0000, Robin Gong wrote:
> On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> > On Tue, Mar 10, 2020 at 07:31:56PM +0800, Robin Gong wrote:
> > > ERR009165 fixed on i.mx6ul/6ull/6sll. All other i.mx6/7 and i.mx8m/8mm
> > > still need this errata. Please refer to nxp official errata document
> > > from
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nx
> > p.com%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7Cf73bfc11a68c4
> > 2f5f6d308d7c4c96efa%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C
> > 637194241755109112&amp;sdata=xzIUP8qZkrlDXX0yjTcUNZB6zDrevTdHFg1o4
> > PZZd8E%3D&amp;reserved=0 .
> > >
> > > For removing workaround on those chips. Add new i.mx6ul type.
> > >
> > > Signed-off-by: Robin Gong <[email protected]>
> > > Acked-by: Mark Brown <[email protected]>
> > > ---
> > > drivers/spi/spi-imx.c | 50
> > > +++++++++++++++++++++++++++++++++++++++++++++-----
> > > 1 file changed, 45 insertions(+), 5 deletions(-)
> > >
> > > diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index
> > > 842a86e..f7ee2ec 100644
> > > --- a/drivers/spi/spi-imx.c
> > > +++ b/drivers/spi/spi-imx.c
> > > @@ -57,6 +57,7 @@ enum spi_imx_devtype {
> > > IMX35_CSPI, /* CSPI on all i.mx except above */
> > > IMX51_ECSPI, /* ECSPI on i.mx51 */
> > > IMX53_ECSPI, /* ECSPI on i.mx53 and later */
> > > + IMX6UL_ECSPI, /* ERR009165 fix from i.mx6ul */
> > > };
> > >
> > > struct spi_imx_data;
> > > @@ -75,6 +76,11 @@ struct spi_imx_devtype_data {
> > > bool has_slavemode;
> > > unsigned int fifo_size;
> > > bool dynamic_burst;
> > > + /*
> > > + * ERR009165 fixed or not:
> > > + *
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nx
> > p.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7Cyi
> > bin.gong%40nxp.com%7Cf73bfc11a68c42f5f6d308d7c4c96efa%7C686ea1d3bc
> > 2b4c6fa92cd99c5c301635%7C0%7C1%7C637194241755109112&amp;sdata=m
> > uw4HL5nMDjREJwVd885Wrxka0moMaaZ%2BhJgsAgY3eo%3D&amp;reserved=
> > 0
> > > + */
> > > + bool tx_glitch_fixed;
> > > enum spi_imx_devtype devtype;
> > > };
> > >
> > > @@ -128,7 +134,8 @@ static inline int is_imx35_cspi(struct
> > > spi_imx_data *d)
> > >
> > > static inline int is_imx51_ecspi(struct spi_imx_data *d) {
> > > - return d->devtype_data->devtype == IMX51_ECSPI;
> > > + return d->devtype_data->devtype == IMX51_ECSPI ||
> > > + d->devtype_data->devtype == IMX6UL_ECSPI;
> > > }
> >
> > Erm, no. A i.MX51 ECSPI is a i.MX51 ECSPI and not a i.MX6UL ECSPI. If you want
> > to handle them equally somewhere then explicitly test for i.MX6ul *and*
> > i.MX51 there.
> But all i.mx6 chips including i.MX53 ECSPI are almost same as i.MX51 ECSPI, and ERR00915 is fixed from i.mx6ul....

You introduce .devtype = IMX6UL_ECSPI in this series, so apparently it
is *not* the same as IMX51_ECSPI, then please also don't introduce a
function which claims they are the same.

Sascha

--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
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Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

2020-03-10 09:29:34

by Sascha Hauer

Subject: Re: [RESEND v6 09/13] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

On Tue, Mar 10, 2020 at 08:59:03AM +0000, Robin Gong wrote:
> On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> > On Tue, Mar 10, 2020 at 07:31:58PM +0800, Robin Gong wrote:
> > > ECSPI issue fixed from i.mx6ul at hardware level, no need
> > > ERR009165 anymore on those chips such as i.mx8mq. Add i.mx6sx from
> > > where i.mx6ul source.
> > >
> > > Signed-off-by: Robin Gong <[email protected]>
> > > Acked-by: Vinod Koul <[email protected]>
> > > ---
> > > drivers/dma/imx-sdma.c | 51
> > > +++++++++++++++++++++++++++++++++++++++++++++++++-
> > > 1 file changed, 50 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index
> > > 56288d8..5ae7237 100644
> > > --- a/drivers/dma/imx-sdma.c
> > > +++ b/drivers/dma/imx-sdma.c
> > > @@ -419,6 +419,13 @@ struct sdma_driver_data {
> > > int num_events;
> > > struct sdma_script_start_addrs *script_addrs;
> > > bool check_ratio;
> > > + /*
> > > + * ecspi ERR009165 fixed should be done in sdma script
> > > + * and it has been fixed in soc from i.mx6ul.
> > > + * please get more information from the below link:
> > > + *
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.nx
> > p.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7Cyi
> > bin.gong%40nxp.com%7C91d42046e6894501d48508d7c4cbcae2%7C686ea1d3
> > bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637194251876090170&amp;sdata=
> > T6LA4xz9CUFlNpnyjHSThEQb8i1rhbY9e1nUyxIGD5Q%3D&amp;reserved=0
> > > + */
> > > + bool ecspi_fixed;
> > > };
> > >
> > > struct sdma_engine {
> > > @@ -539,6 +546,31 @@ static struct sdma_driver_data sdma_imx6q = {
> > > .script_addrs = &sdma_script_imx6q,
> > > };
> > >
> > > +static struct sdma_script_start_addrs sdma_script_imx6sx = {
> > > + .ap_2_ap_addr = 642,
> > > + .uart_2_mcu_addr = 817,
> > > + .mcu_2_app_addr = 747,
> > > + .uartsh_2_mcu_addr = 1032,
> > > + .mcu_2_shp_addr = 960,
> > > + .app_2_mcu_addr = 683,
> > > + .shp_2_mcu_addr = 891,
> > > + .spdif_2_mcu_addr = 1100,
> > > + .mcu_2_spdif_addr = 1134,
> > > +};
> > > +
> > > +static struct sdma_driver_data sdma_imx6sx = {
> > > + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> > > + .num_events = 48,
> > > + .script_addrs = &sdma_script_imx6sx, };
> > > +
> > > +static struct sdma_driver_data sdma_imx6ul = {
> > > + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> > > + .num_events = 48,
> > > + .script_addrs = &sdma_script_imx6sx,
> > > + .ecspi_fixed = true,
> > > +};
> > > +
> > > static struct sdma_script_start_addrs sdma_script_imx7d = {
> > > .ap_2_ap_addr = 644,
> > > .uart_2_mcu_addr = 819,
> > > @@ -584,9 +616,15 @@ static const struct platform_device_id
> > sdma_devtypes[] = {
> > > .name = "imx6q-sdma",
> > > .driver_data = (unsigned long)&sdma_imx6q,
> > > }, {
> > > + .name = "imx6sx-sdma",
> > > + .driver_data = (unsigned long)&sdma_imx6sx,
> > > + }, {
> >
> > Now the i.MX6sx uses a new sdma_script_start_addrs entry which is the same
> > as the i.MX6q one we used before with one exception: it lacks the
> > per_2_per_addr = 6331 entry. This is only used for IMX_DMATYPE_ASRC and
> Totally same script for i.mx6 chips whatever i.MX6sx, i.MX6q or i.MX6ul.

When it's the same then use it.

> > IMX_DMATYPE_ASRC_SP, both are entirely unused in the mainline kernel. So
> > why must the i.MX6sx changed here and what has this to do with ECSPI?
> i.MX6ul is based on i.MX6sx, so adding i.MX6sx could keep good shape on our i.MX family evolution.

My point is that there is no difference between i.MX6q and i.MX6sx here,
so do not artificially introduce i.MX6sx support when all you do is
copying the i.MX6q support.

Sascha

--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

2020-03-10 09:33:11

by Robin Gong

Subject: RE: [RESEND v6 07/13] spi: imx: remove ERR009165 workaround on i.mx6ul

On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> On Tue, Mar 10, 2020 at 08:43:10AM +0000, Robin Gong wrote:
> > On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> > > On Tue, Mar 10, 2020 at 07:31:56PM +0800, Robin Gong wrote:
> > > > ERR009165 fixed on i.mx6ul/6ull/6sll. All other i.mx6/7 and
> > > > i.mx8m/8mm still need this errata. Please refer to nxp official
> > > > errata document from
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fww
> > > w.nx
> > >
> p.com%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7Cf73bfc11a68c4
> > >
> 2f5f6d308d7c4c96efa%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C
> > >
> 637194241755109112&amp;sdata=xzIUP8qZkrlDXX0yjTcUNZB6zDrevTdHFg1o4
> > > PZZd8E%3D&amp;reserved=0 .
> > > >
> > > > For removing workaround on those chips. Add new i.mx6ul type.
> > > >
> > > > Signed-off-by: Robin Gong <[email protected]>
> > > > Acked-by: Mark Brown <[email protected]>
> > > > ---
> > > > drivers/spi/spi-imx.c | 50
> > > > +++++++++++++++++++++++++++++++++++++++++++++-----
> > > > 1 file changed, 45 insertions(+), 5 deletions(-)
> > > >
> > > > diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index
> > > > 842a86e..f7ee2ec 100644
> > > > --- a/drivers/spi/spi-imx.c
> > > > +++ b/drivers/spi/spi-imx.c
> > > > @@ -57,6 +57,7 @@ enum spi_imx_devtype {
> > > > IMX35_CSPI, /* CSPI on all i.mx except above */
> > > > IMX51_ECSPI, /* ECSPI on i.mx51 */
> > > > IMX53_ECSPI, /* ECSPI on i.mx53 and later */
> > > > + IMX6UL_ECSPI, /* ERR009165 fix from i.mx6ul */
> > > > };
> > > >
> > > > struct spi_imx_data;
> > > > @@ -75,6 +76,11 @@ struct spi_imx_devtype_data {
> > > > bool has_slavemode;
> > > > unsigned int fifo_size;
> > > > bool dynamic_burst;
> > > > + /*
> > > > + * ERR009165 fixed or not:
> > > > + *
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fww
> > > w.nx
> p.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7Cyi
> > >
> bin.gong%40nxp.com%7Cf73bfc11a68c42f5f6d308d7c4c96efa%7C686ea1d3bc
> > >
> 2b4c6fa92cd99c5c301635%7C0%7C1%7C637194241755109112&amp;sdata=m
> > >
> uw4HL5nMDjREJwVd885Wrxka0moMaaZ%2BhJgsAgY3eo%3D&amp;reserved=
> > > 0
> > > > + */
> > > > + bool tx_glitch_fixed;
> > > > enum spi_imx_devtype devtype;
> > > > };
> > > >
> > > > @@ -128,7 +134,8 @@ static inline int is_imx35_cspi(struct
> > > > spi_imx_data *d)
> > > >
> > > > static inline int is_imx51_ecspi(struct spi_imx_data *d) {
> > > > - return d->devtype_data->devtype == IMX51_ECSPI;
> > > > + return d->devtype_data->devtype == IMX51_ECSPI ||
> > > > + d->devtype_data->devtype == IMX6UL_ECSPI;
> > > > }
> > >
> > > Erm, no. A i.MX51 ECSPI is a i.MX51 ECSPI and not a i.MX6UL ECSPI.
> > > If you want to handle them equally somewhere then explicitly test
> > > for i.MX6ul *and*
> > > i.MX51 there.
> > But all i.mx6 chips including i.MX53 ECSPI are almost same as i.MX51 ECSPI,
> and ERR00915 is fixed from i.mx6ul....
>
> You introduce .devtype = IMX6UL_ECSPI in this series, so apparently it is *not*
> the same as IMX51_ECSPI, then please also don't introduce a function which
> claims they are the same.
Okay, I'll add is_imx6ul_ecspi explicitly.
>
> Sascha
>
> --
> Pengutronix e.K. |
> |
> Steuerwalder Str. 21 |
> https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pe
> ngutronix.de%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7Ca10f3fdc
> 28084c1fe89a08d7c4d50531%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7
> C0%7C637194291506592966&amp;sdata=aqMqER0j0fVbAiKqM1tzBuEVlhiVcVL
> GnrSRhJvhDk8%3D&amp;reserved=0 |
> 31137 Hildesheim, Germany | Phone: +49-5121-206917-0
> |
> Amtsgericht Hildesheim, HRA 2686 | Fax:
> +49-5121-206917-5555 |

2020-03-10 09:36:37

by Robin Gong

Subject: RE: [RESEND v6 09/13] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> On Tue, Mar 10, 2020 at 08:59:03AM +0000, Robin Gong wrote:
> > On 2020/03/10 Sascha Hauer <[email protected]> wrote:
> > > On Tue, Mar 10, 2020 at 07:31:58PM +0800, Robin Gong wrote:
> > > > ECSPI issue fixed from i.mx6ul at hardware level, no need
> > > > ERR009165 anymore on those chips such as i.mx8mq. Add i.mx6sx from
> > > > where i.mx6ul source.
> > > >
> > > > Signed-off-by: Robin Gong <[email protected]>
> > > > Acked-by: Vinod Koul <[email protected]>
> > > > ---
> > > > drivers/dma/imx-sdma.c | 51
> > > > +++++++++++++++++++++++++++++++++++++++++++++++++-
> > > > 1 file changed, 50 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index
> > > > 56288d8..5ae7237 100644
> > > > --- a/drivers/dma/imx-sdma.c
> > > > +++ b/drivers/dma/imx-sdma.c
> > > > @@ -419,6 +419,13 @@ struct sdma_driver_data {
> > > > int num_events;
> > > > struct sdma_script_start_addrs *script_addrs;
> > > > bool check_ratio;
> > > > + /*
> > > > + * ecspi ERR009165 fixed should be done in sdma script
> > > > + * and it has been fixed in soc from i.mx6ul.
> > > > + * please get more information from the below link:
> > > > + *
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fww
> > > w.nx
> p.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7Cyi
> > >
> bin.gong%40nxp.com%7C91d42046e6894501d48508d7c4cbcae2%7C686ea1d3
> > >
> bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637194251876090170&amp;sdata=
> > > T6LA4xz9CUFlNpnyjHSThEQb8i1rhbY9e1nUyxIGD5Q%3D&amp;reserved=0
> > > > + */
> > > > + bool ecspi_fixed;
> > > > };
> > > >
> > > > struct sdma_engine {
> > > > @@ -539,6 +546,31 @@ static struct sdma_driver_data sdma_imx6q = {
> > > > .script_addrs = &sdma_script_imx6q, };
> > > >
> > > > +static struct sdma_script_start_addrs sdma_script_imx6sx = {
> > > > + .ap_2_ap_addr = 642,
> > > > + .uart_2_mcu_addr = 817,
> > > > + .mcu_2_app_addr = 747,
> > > > + .uartsh_2_mcu_addr = 1032,
> > > > + .mcu_2_shp_addr = 960,
> > > > + .app_2_mcu_addr = 683,
> > > > + .shp_2_mcu_addr = 891,
> > > > + .spdif_2_mcu_addr = 1100,
> > > > + .mcu_2_spdif_addr = 1134,
> > > > +};
> > > > +
> > > > +static struct sdma_driver_data sdma_imx6sx = {
> > > > + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> > > > + .num_events = 48,
> > > > + .script_addrs = &sdma_script_imx6sx, };
> > > > +
> > > > +static struct sdma_driver_data sdma_imx6ul = {
> > > > + .chnenbl0 = SDMA_CHNENBL0_IMX35,
> > > > + .num_events = 48,
> > > > + .script_addrs = &sdma_script_imx6sx,
> > > > + .ecspi_fixed = true,
> > > > +};
> > > > +
> > > > static struct sdma_script_start_addrs sdma_script_imx7d = {
> > > > .ap_2_ap_addr = 644,
> > > > .uart_2_mcu_addr = 819,
> > > > @@ -584,9 +616,15 @@ static const struct platform_device_id
> > > sdma_devtypes[] = {
> > > > .name = "imx6q-sdma",
> > > > .driver_data = (unsigned long)&sdma_imx6q,
> > > > }, {
> > > > + .name = "imx6sx-sdma",
> > > > + .driver_data = (unsigned long)&sdma_imx6sx,
> > > > + }, {
> > >
> > > Now the i.MX6sx uses a new sdma_script_start_addrs entry which is
> > > the same as the i.MX6q one we used before with one exception: it
> > > lacks the per_2_per_addr = 6331 entry. This is only used for
> > > IMX_DMATYPE_ASRC and
> > Totally same script for i.mx6 chips whatever i.MX6sx, i.MX6q or i.MX6ul.
>
> When it's the same then use it.
>
> > > IMX_DMATYPE_ASRC_SP, both are entirely unused in the mainline
> > > kernel. So why must the i.MX6sx changed here and what has this to do with
> ECSPI?
> > i.MX6ul is based on i.MX6sx, so adding i.MX6sx could keep good shape on our
> i.MX family evolution.
>
> My point is that there is no difference between i.MX6q and i.MX6sx here, so do
> not artificially introduce i.MX6sx support when all you do is copying the i.MX6q
> support.
Okay, will remove i.MX6sx now.
> --
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2020-03-10 18:41:37

by Rob Herring

Subject: Re: [RESEND v6 08/13] spi: imx: add new i.mx6ul compatible name in binding doc

On Tue, 10 Mar 2020 19:31:57 +0800, Robin Gong wrote:
> ERR009165 fixed from i.mx6ul, add its compatible name in binding doc.
>
> Signed-off-by: Robin Gong <[email protected]>
> Acked-by: Mark Brown <[email protected]>
> ---
> Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt | 1 +
> 1 file changed, 1 insertion(+)
>

Please add Acked-by/Reviewed-by tags when posting new versions. However,
there's no need to repost patches *only* to add the tags. The upstream
maintainer will do that for acks received on the version they apply.

If a tag was not added on purpose, please state why and what changed.

2020-03-11 03:24:18

by Robin Gong

Subject: RE: [RESEND v6 08/13] spi: imx: add new i.mx6ul compatible name in binding doc

On 2020/03/11 Rob Herring <[email protected]> wrote:
> On Tue, 10 Mar 2020 19:31:57 +0800, Robin Gong wrote:
> > ERR009165 fixed from i.mx6ul, add its compatible name in binding doc.
> >
> > Signed-off-by: Robin Gong <[email protected]>
> > Acked-by: Mark Brown <[email protected]>
> > ---
> > Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt | 1 +
> > 1 file changed, 1 insertion(+)
> >
>
> Please add Acked-by/Reviewed-by tags when posting new versions. However,
> there's no need to repost patches *only* to add the tags. The upstream
> maintainer will do that for acks received on the version they apply.
>
> If a tag was not added on purpose, please state why and what changed.
Sorry, Rob, I forgot to add your reviewed tag on v5, will add it back incidentally in v7.