v3:
Modify clock rate for dual edge setting.
Add more bridge function.
v2:
Modify unused code
v1:
DPI can sample on falling, rising or both edge.
When DPI sample the data both rising and falling edge.
It can reduce half data io pins.
Rex-BC Chen (3):
drm/mediatek: dpi dual edge sample mode support
drm/mediatek: config mt8183 driver data to support dual edge sample
drm/mediatek: dpi: add bus format negotiation
drivers/gpu/drm/mediatek/mtk_dpi.c | 107 +++++++++++++++++++++++++++--
1 file changed, 101 insertions(+), 6 deletions(-)
--
2.18.0
DPI can sample on falling, rising or both edge.
When DPI sample the data both rising and falling edge.
It can reduce half data io pins.
Signed-off-by: Jitao Shi <[email protected]>
Signed-off-by: Rex-BC Chen <[email protected]>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index b05f900d9322..79f3e83f40ef 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -83,6 +83,7 @@ struct mtk_dpi {
struct pinctrl *pinctrl;
struct pinctrl_state *pins_gpio;
struct pinctrl_state *pins_dpi;
+ bool ddr_edge_sel;
int refcount;
};
@@ -121,6 +122,7 @@ struct mtk_dpi_conf {
unsigned int (*cal_factor)(int clock);
u32 reg_h_fre_con;
bool edge_sel_en;
+ bool dual_edge;
};
static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
@@ -380,6 +382,15 @@ static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
}
}
+static void mtk_dpi_dual_edge(struct mtk_dpi *dpi)
+{
+ if (dpi->conf->dual_edge) {
+ mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE,
+ DDR_EN | DDR_4PHASE);
+ mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, dpi->ddr_edge_sel ? EDGE_SEL : 0, EDGE_SEL);
+ }
+}
+
static void mtk_dpi_power_off(struct mtk_dpi *dpi)
{
if (WARN_ON(dpi->refcount == 0))
@@ -454,7 +465,7 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
pll_rate = clk_get_rate(dpi->tvd_clk);
vm.pixelclock = pll_rate / factor;
- clk_set_rate(dpi->pixel_clk, vm.pixelclock);
+ clk_set_rate(dpi->pixel_clk, vm.pixelclock * (dpi->conf->dual_edge ? 2 : 1));
vm.pixelclock = clk_get_rate(dpi->pixel_clk);
dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n",
@@ -518,6 +529,7 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
mtk_dpi_config_yc_map(dpi, dpi->yc_map);
mtk_dpi_config_color_format(dpi, dpi->color_format);
mtk_dpi_config_2n_h_fre(dpi);
+ mtk_dpi_dual_edge(dpi);
mtk_dpi_config_disable_edge(dpi);
mtk_dpi_sw_reset(dpi, false);
--
2.18.0
Add the atomic_get_output_bus_fmts, atomic_get_input_bus_fmts to negotiate
the possible output and input formats for the current mode and monitor,
and use the negotiated formats in a basic atomic_check callback.
Signed-off-by: Jitao Shi <[email protected]>
Signed-off-by: Rex-BC Chen <[email protected]>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 92 ++++++++++++++++++++++++++++--
1 file changed, 87 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index c548780dd3a5..8822d9448ae8 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -536,6 +536,87 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
return 0;
}
+#define MAX_OUTPUT_SEL_FORMATS 2
+
+static u32 *mtk_dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ u32 *output_fmts;
+ struct mtk_dpi *dpi = bridge_to_dpi(bridge);
+
+ *num_output_fmts = 0;
+
+ output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
+ GFP_KERNEL);
+ if (!output_fmts)
+ return NULL;
+
+ /* Default 8bit RGB fallback */
+ if (dpi->conf->dual_edge) {
+ output_fmts[0] = MEDIA_BUS_FMT_RGB888_2X12_LE;
+ output_fmts[1] = MEDIA_BUS_FMT_RGB888_2X12_BE;
+ *num_output_fmts = 2;
+ } else {
+ output_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_output_fmts = 1;
+ }
+
+ return output_fmts;
+}
+
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ *num_input_fmts = 1;
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+
+ return input_fmts;
+}
+
+static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct mtk_dpi *dpi = bridge->driver_private;
+ unsigned int out_bus_format;
+
+ out_bus_format = bridge_state->output_bus_cfg.format;
+
+ dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
+ bridge_state->input_bus_cfg.format,
+ bridge_state->output_bus_cfg.format);
+
+ dpi->ddr_edge_sel = (out_bus_format == MEDIA_BUS_FMT_RGB888_2X12_LE) ?
+ true : false;
+
+ dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
+ dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
+ dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
+ dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
+
+ return 0;
+}
+
static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
@@ -574,6 +655,12 @@ static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
.mode_set = mtk_dpi_bridge_mode_set,
.disable = mtk_dpi_bridge_disable,
.enable = mtk_dpi_bridge_enable,
+ .atomic_check = mtk_dpi_bridge_atomic_check,
+ .atomic_get_output_bus_fmts = mtk_dpi_bridge_atomic_get_output_bus_fmts,
+ .atomic_get_input_bus_fmts = mtk_dpi_bridge_atomic_get_input_bus_fmts,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
};
void mtk_dpi_start(struct device *dev)
@@ -620,11 +707,6 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
}
drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
- dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
- dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
- dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
- dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
-
return 0;
err_cleanup:
--
2.18.0
Hi, Rex:
Rex-BC Chen <[email protected]> 於 2021年4月29日 週四 下午12:16寫道：
>
> Add the atomic_get_output_bus_fmts, atomic_get_input_bus_fmts to negotiate
> the possible output and input formats for the current mode and monitor,
> and use the negotiated formats in a basic atomic_check callback.
>
> Signed-off-by: Jitao Shi <[email protected]>
> Signed-off-by: Rex-BC Chen <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 92 ++++++++++++++++++++++++++++--
> 1 file changed, 87 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index c548780dd3a5..8822d9448ae8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -536,6 +536,87 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> return 0;
> }
>
> +#define MAX_OUTPUT_SEL_FORMATS 2
> +
> +static u32 *mtk_dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state,
> + unsigned int *num_output_fmts)
> +{
> + u32 *output_fmts;
> + struct mtk_dpi *dpi = bridge_to_dpi(bridge);
> +
> + *num_output_fmts = 0;
> +
> + output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
> + GFP_KERNEL);
> + if (!output_fmts)
> + return NULL;
> +
> + /* Default 8bit RGB fallback */
> + if (dpi->conf->dual_edge) {
> + output_fmts[0] = MEDIA_BUS_FMT_RGB888_2X12_LE;
> + output_fmts[1] = MEDIA_BUS_FMT_RGB888_2X12_BE;
> + *num_output_fmts = 2;
> + } else {
> + output_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
> + *num_output_fmts = 1;
> + }
> +
> + return output_fmts;
> +}
> +
> +#define MAX_INPUT_SEL_FORMATS 1
> +
> +static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state,
> + u32 output_fmt,
> + unsigned int *num_input_fmts)
> +{
> + u32 *input_fmts;
> +
> + *num_input_fmts = 0;
> +
> + input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
> + GFP_KERNEL);
> + if (!input_fmts)
> + return NULL;
> +
> + *num_input_fmts = 1;
> + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
> +
> + return input_fmts;
> +}
> +
> +static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct mtk_dpi *dpi = bridge->driver_private;
> + unsigned int out_bus_format;
> +
> + out_bus_format = bridge_state->output_bus_cfg.format;
> +
> + dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
> + bridge_state->input_bus_cfg.format,
> + bridge_state->output_bus_cfg.format);
> +
> + dpi->ddr_edge_sel = (out_bus_format == MEDIA_BUS_FMT_RGB888_2X12_LE) ?
> + true : false;
I would like to keep the out_bus_format rather than keep ddr_edge_sel,
and in mtk_dpi_dual_edge() use dpi->out_bus_format to decide edge
selection.
Regards,
Chun-Kuang.
> +
> + dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
> + dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
> + dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
> + dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
> +
> + return 0;
> +}
> +
> static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
> enum drm_bridge_attach_flags flags)
> {
>
> @@ -574,6 +655,12 @@ static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
> .mode_set = mtk_dpi_bridge_mode_set,
> .disable = mtk_dpi_bridge_disable,
> .enable = mtk_dpi_bridge_enable,
> + .atomic_check = mtk_dpi_bridge_atomic_check,
> + .atomic_get_output_bus_fmts = mtk_dpi_bridge_atomic_get_output_bus_fmts,
> + .atomic_get_input_bus_fmts = mtk_dpi_bridge_atomic_get_input_bus_fmts,
> + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> + .atomic_reset = drm_atomic_helper_bridge_reset,
> };
>
> void mtk_dpi_start(struct device *dev)
> @@ -620,11 +707,6 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
> }
> drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
>
> - dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
> - dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
> - dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
> - dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
> -
> return 0;
>
> err_cleanup:
> --
> 2.18.0
>
Hi, Rex:
Rex-BC Chen <[email protected]> 於 2021年4月29日 週四 下午12:16寫道：
>
> Add the atomic_get_output_bus_fmts, atomic_get_input_bus_fmts to negotiate
> the possible output and input formats for the current mode and monitor,
> and use the negotiated formats in a basic atomic_check callback.
>
> Signed-off-by: Jitao Shi <[email protected]>
> Signed-off-by: Rex-BC Chen <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 92 ++++++++++++++++++++++++++++--
> 1 file changed, 87 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index c548780dd3a5..8822d9448ae8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -536,6 +536,87 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
> return 0;
> }
>
> +#define MAX_OUTPUT_SEL_FORMATS 2
> +
> +static u32 *mtk_dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state,
> + unsigned int *num_output_fmts)
> +{
> + u32 *output_fmts;
> + struct mtk_dpi *dpi = bridge_to_dpi(bridge);
> +
> + *num_output_fmts = 0;
> +
> + output_fmts = kcalloc(MAX_OUTPUT_SEL_FORMATS, sizeof(*output_fmts),
> + GFP_KERNEL);
> + if (!output_fmts)
> + return NULL;
> +
> + /* Default 8bit RGB fallback */
> + if (dpi->conf->dual_edge) {
> + output_fmts[0] = MEDIA_BUS_FMT_RGB888_2X12_LE;
> + output_fmts[1] = MEDIA_BUS_FMT_RGB888_2X12_BE;
> + *num_output_fmts = 2;
In the definition of dual_edge, it may imply that support
MEDIA_BUS_FMT_BGR565_2X8_BE and MEDIA_BUS_FMT_BGR565_2X8_LE. So I
would like dpi->conf to store output_fmts instead of dual_edge. The
output_fmts could imply use dual_edge or not.
Regards,
Chun-Kuang.
> + } else {
> + output_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
> + *num_output_fmts = 1;
> + }
> +
> + return output_fmts;
> +}
> +
> +#define MAX_INPUT_SEL_FORMATS 1
> +
> +static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state,
> + u32 output_fmt,
> + unsigned int *num_input_fmts)
> +{
> + u32 *input_fmts;
> +
> + *num_input_fmts = 0;
> +
> + input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
> + GFP_KERNEL);
> + if (!input_fmts)
> + return NULL;
> +
> + *num_input_fmts = 1;
> + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
> +
> + return input_fmts;
> +}
> +
> +static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct mtk_dpi *dpi = bridge->driver_private;
> + unsigned int out_bus_format;
> +
> + out_bus_format = bridge_state->output_bus_cfg.format;
> +
> + dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
> + bridge_state->input_bus_cfg.format,
> + bridge_state->output_bus_cfg.format);
> +
> + dpi->ddr_edge_sel = (out_bus_format == MEDIA_BUS_FMT_RGB888_2X12_LE) ?
> + true : false;
> +
> + dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
> + dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
> + dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
> + dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
> +
> + return 0;
> +}
> +
> static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
> enum drm_bridge_attach_flags flags)
> {
>
> @@ -574,6 +655,12 @@ static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
> .mode_set = mtk_dpi_bridge_mode_set,
> .disable = mtk_dpi_bridge_disable,
> .enable = mtk_dpi_bridge_enable,
> + .atomic_check = mtk_dpi_bridge_atomic_check,
> + .atomic_get_output_bus_fmts = mtk_dpi_bridge_atomic_get_output_bus_fmts,
> + .atomic_get_input_bus_fmts = mtk_dpi_bridge_atomic_get_input_bus_fmts,
> + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> + .atomic_reset = drm_atomic_helper_bridge_reset,
> };
>
> void mtk_dpi_start(struct device *dev)
> @@ -620,11 +707,6 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
> }
> drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
>
> - dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
> - dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
> - dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
> - dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
> -
> return 0;
>
> err_cleanup:
> --
> 2.18.0
>