Add the required changes to support 7nm pll/phy in CPHY mode.
This adds a "qcom,dsi-phy-cphy-mode" property for the PHY node to enable
the CPHY mode.
v2:
- rebased on DSI PHY reworks
- reworked getting cphy_mode in dsi_host.c
- documentation change in separate patch
Jonathan Marek (2):
drm/msm/dsi: support CPHY mode for 7nm pll/phy
dt-bindings: display: msm/dsi: add qcom,dsi-phy-cphy-mode option
.../devicetree/bindings/display/msm/dsi.txt | 1 +
drivers/gpu/drm/msm/dsi/dsi.xml.h | 2 +
drivers/gpu/drm/msm/dsi/dsi_host.c | 34 +++-
drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 47 ++++++
drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 3 +
drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 147 ++++++++++++------
6 files changed, 186 insertions(+), 48 deletions(-)
--
2.26.1
Add the required changes to support 7nm pll/phy in CPHY mode.
This adds a "qcom,dsi-phy-cphy-mode" property for the PHY node to enable
the CPHY mode.
Signed-off-by: Jonathan Marek <[email protected]>
---
drivers/gpu/drm/msm/dsi/dsi.xml.h | 2 +
drivers/gpu/drm/msm/dsi/dsi_host.c | 34 ++++-
drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 47 +++++++
drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 3 +
drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 147 +++++++++++++++-------
5 files changed, 185 insertions(+), 48 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi.xml.h b/drivers/gpu/drm/msm/dsi/dsi.xml.h
index 50eb4d1b8fdd..5087a65d3e11 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.xml.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.xml.h
@@ -621,6 +621,8 @@ static inline uint32_t DSI_VERSION_MAJOR(uint32_t val)
return ((val) << DSI_VERSION_MAJOR__SHIFT) & DSI_VERSION_MAJOR__MASK;
}
+#define REG_DSI_CPHY_MODE_CTRL 0x000002d4
+
#define REG_DSI_PHY_PLL_CTRL_0 0x00000200
#define DSI_PHY_PLL_CTRL_0_ENABLE 0x00000001
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 8a10e4343281..ab8a8d408d50 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -27,6 +27,7 @@
#include "dsi_cfg.h"
#include "msm_kms.h"
#include "msm_gem.h"
+#include "phy/dsi_phy.h"
#define DSI_RESET_TOGGLE_DELAY_MS 20
@@ -168,6 +169,9 @@ struct msm_dsi_host {
int dlane_swap;
int num_data_lanes;
+ /* from phy DT */
+ bool cphy_mode;
+
u32 dma_cmd_ctrl_restore;
bool registered;
@@ -511,6 +515,7 @@ int msm_dsi_runtime_resume(struct device *dev)
int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
{
+ u32 byte_intf_rate;
int ret;
DBG("Set clk rates: pclk=%d, byteclk=%d",
@@ -530,8 +535,13 @@ int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
}
if (msm_host->byte_intf_clk) {
- ret = clk_set_rate(msm_host->byte_intf_clk,
- msm_host->byte_clk_rate / 2);
+ /* For CPHY, byte_intf_clk is same as byte_clk */
+ if (msm_host->cphy_mode)
+ byte_intf_rate = msm_host->byte_clk_rate;
+ else
+ byte_intf_rate = msm_host->byte_clk_rate / 2;
+
+ ret = clk_set_rate(msm_host->byte_intf_clk, byte_intf_rate);
if (ret) {
pr_err("%s: Failed to set rate byte intf clk, %d\n",
__func__, ret);
@@ -711,7 +721,11 @@ static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_dual_dsi)
lanes = 1;
}
- do_div(pclk_bpp, (8 * lanes));
+ /* CPHY "byte_clk" is in units of 16 bits */
+ if (msm_host->cphy_mode)
+ do_div(pclk_bpp, (16 * lanes));
+ else
+ do_div(pclk_bpp, (8 * lanes));
msm_host->pixel_clk_rate = pclk_rate;
msm_host->byte_clk_rate = pclk_bpp;
@@ -937,6 +951,9 @@ static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
data |= DSI_CTRL_ENABLE;
dsi_write(msm_host, REG_DSI_CTRL, data);
+
+ if (msm_host->cphy_mode)
+ dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
}
static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_dual_dsi)
@@ -2230,6 +2247,8 @@ int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
struct clk *byte_clk_provider, *pixel_clk_provider;
int ret;
+ msm_host->cphy_mode = src_phy->cphy_mode;
+
ret = msm_dsi_phy_get_clk_provider(src_phy,
&byte_clk_provider, &pixel_clk_provider);
if (ret) {
@@ -2301,7 +2320,14 @@ void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
return;
}
- clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
+ /* CPHY transmits 16 bits over 7 clock cycles
+ * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
+ * so multiply by 7 to get the "bitclk rate"
+ */
+ if (msm_host->cphy_mode)
+ clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
+ else
+ clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
clk_req->escclk_rate = msm_host->esc_clk_rate;
}
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
index ff7f2ec42030..5dd9dc4d81e2 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
@@ -461,6 +461,51 @@ int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
return 0;
}
+int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
+ struct msm_dsi_phy_clk_request *clk_req)
+{
+ const unsigned long bit_rate = clk_req->bitclk_rate;
+ const unsigned long esc_rate = clk_req->escclk_rate;
+ s32 ui, ui_x7;
+ s32 tmax, tmin;
+ s32 coeff = 1000; /* Precision, should avoid overflow */
+ s32 temp;
+
+ if (!bit_rate || !esc_rate)
+ return -EINVAL;
+
+ ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
+ ui_x7 = ui * 7;
+
+ temp = S_DIV_ROUND_UP(38 * coeff, ui_x7);
+ tmin = max_t(s32, temp, 0);
+ temp = (95 * coeff) / ui_x7;
+ tmax = max_t(s32, temp, 0);
+ timing->clk_prepare = linear_inter(tmax, tmin, 50, 0, false);
+
+ tmin = DIV_ROUND_UP(50 * coeff, ui_x7);
+ tmax = 255;
+ timing->hs_rqst = linear_inter(tmax, tmin, 1, 0, false);
+
+ tmin = DIV_ROUND_UP(100 * coeff, ui_x7) - 1;
+ tmax = 255;
+ timing->hs_exit = linear_inter(tmax, tmin, 10, 0, false);
+
+ tmin = 1;
+ tmax = 32;
+ timing->shared_timings.clk_post = linear_inter(tmax, tmin, 80, 0, false);
+
+ tmin = min_t(s32, 64, S_DIV_ROUND_UP(262 * coeff, ui_x7) - 1);
+ tmax = 64;
+ timing->shared_timings.clk_pre = linear_inter(tmax, tmin, 20, 0, false);
+
+ DBG("%d, %d, %d, %d, %d",
+ timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
+ timing->clk_prepare, timing->hs_exit, timing->hs_rqst);
+
+ return 0;
+}
+
static int dsi_phy_regulator_init(struct msm_dsi_phy *phy)
{
struct regulator_bulk_data *s = phy->supplies;
@@ -657,6 +702,8 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
phy->regulator_ldo_mode = of_property_read_bool(dev->of_node,
"qcom,dsi-phy-regulator-ldo-mode");
+ phy->cphy_mode = of_property_read_bool(dev->of_node,
+ "qcom,dsi-phy-cphy-mode");
phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
if (IS_ERR(phy->base)) {
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
index 94a77ac364d3..432e9a9de52f 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
@@ -95,6 +95,7 @@ struct msm_dsi_phy {
enum msm_dsi_phy_usecase usecase;
bool regulator_ldo_mode;
+ bool cphy_mode;
struct clk_hw *vco_hw;
bool pll_on;
@@ -115,5 +116,7 @@ int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
struct msm_dsi_phy_clk_request *clk_req);
int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
struct msm_dsi_phy_clk_request *clk_req);
+int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
+ struct msm_dsi_phy_clk_request *clk_req);
#endif /* __DSI_PHY_H__ */
diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
index e76ce40a12ab..40b791ea7bb9 100644
--- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
+++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
@@ -255,7 +255,7 @@ static void dsi_pll_commit(struct dsi_pll_7nm *pll, struct dsi_pll_config *confi
(config->frac_div_start & 0x30000) >> 16);
dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCKDET_RATE_1, 0x40);
dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCK_DELAY, 0x06);
- dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, 0x10); /* TODO: 0x00 for CPHY */
+ dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, pll->phy->cphy_mode ? 0x00 : 0x10);
dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_CLOCK_INVERTERS, config->pll_clock_inverters);
}
@@ -640,7 +640,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm, struct clk_hw **provide
/* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
- CLK_SET_RATE_PARENT, 1, 8);
+ CLK_SET_RATE_PARENT, 1,
+ pll_7nm->phy->cphy_mode ? 7 : 8);
if (IS_ERR(hw)) {
ret = PTR_ERR(hw);
goto fail;
@@ -661,32 +662,47 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm, struct clk_hw **provide
snprintf(clk_name, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_7nm->phy->id);
- hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
- 0, 1, 4);
+ if (pll_7nm->phy->cphy_mode)
+ hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 2, 7);
+ else
+ hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 4);
if (IS_ERR(hw)) {
ret = PTR_ERR(hw);
goto fail;
}
- snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
- snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->phy->id);
- snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->phy->id);
- snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->phy->id);
- snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
-
- hw = devm_clk_hw_register_mux(dev, clk_name,
- ((const char *[]){
- parent, parent2, parent3, parent4
- }), 4, 0, pll_7nm->phy->base +
- REG_DSI_7nm_PHY_CMN_CLK_CFG1,
- 0, 2, 0, NULL);
- if (IS_ERR(hw)) {
- ret = PTR_ERR(hw);
- goto fail;
- }
+ /* in CPHY mode, pclk_mux will always have post_out_div as parent
+ * don't register a pclk_mux clock and just use post_out_div instead
+ */
+ if (pll_7nm->phy->cphy_mode) {
+ u32 data;
+
+ data = dsi_phy_read(pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
+ dsi_phy_write(pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_CLK_CFG1, data | 3);
+
+ snprintf(parent, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
+ } else {
+ snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
+ snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->phy->id);
+ snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->phy->id);
+ snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->phy->id);
+ snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
+
+ hw = devm_clk_hw_register_mux(dev, clk_name,
+ ((const char *[]){
+ parent, parent2, parent3, parent4
+ }), 4, 0, pll_7nm->phy->base +
+ REG_DSI_7nm_PHY_CMN_CLK_CFG1,
+ 0, 2, 0, NULL);
+ if (IS_ERR(hw)) {
+ ret = PTR_ERR(hw);
+ goto fail;
+ }
+
+ snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
+ }
snprintf(clk_name, 32, "dsi%d_phy_pll_out_dsiclk", pll_7nm->phy->id);
- snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
/* PIX CLK DIV : DIV_CTRL_7_4*/
hw = devm_clk_hw_register_divider(dev, clk_name, parent,
@@ -811,15 +827,21 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
struct msm_dsi_dphy_timing *timing = &phy->timing;
void __iomem *base = phy->base;
bool less_than_1500_mhz;
- u32 vreg_ctrl_0, glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
+ u32 vreg_ctrl_0, vreg_ctrl_1, lane_ctrl0;
+ u32 glbl_pemph_ctrl_0;
+ u32 glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
u32 glbl_rescode_top_ctrl, glbl_rescode_bot_ctrl;
u32 data;
DBG("");
- if (msm_dsi_dphy_timing_calc_v4(timing, clk_req)) {
+ if (phy->cphy_mode)
+ ret = msm_dsi_cphy_timing_calc_v4(timing, clk_req);
+ else
+ ret = msm_dsi_dphy_timing_calc_v4(timing, clk_req);
+ if (ret) {
DRM_DEV_ERROR(&phy->pdev->dev,
- "%s: D-PHY timing calculation failed\n", __func__);
+ "%s: PHY timing calculation failed\n", __func__);
return -EINVAL;
}
@@ -840,6 +862,10 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
/* Alter PHY configurations if data rate less than 1.5GHZ*/
less_than_1500_mhz = (clk_req->bitclk_rate <= 1500000000);
+ /* For C-PHY, no low power settings for lower clk rate */
+ if (phy->cphy_mode)
+ less_than_1500_mhz = false;
+
if (phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_1) {
vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d : 0x00;
@@ -854,6 +880,17 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
glbl_rescode_bot_ctrl = 0x3c;
}
+ if (phy->cphy_mode) {
+ vreg_ctrl_0 = 0x51;
+ vreg_ctrl_1 = 0x55;
+ glbl_pemph_ctrl_0 = 0x11;
+ lane_ctrl0 = 0x17;
+ } else {
+ vreg_ctrl_1 = 0x5c;
+ glbl_pemph_ctrl_0 = 0x00;
+ lane_ctrl0 = 0x1f;
+ }
+
/* de-assert digital and pll power down */
data = BIT(6) | BIT(5);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, data);
@@ -874,15 +911,22 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG0, 0x21);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG1, 0x84);
+ if (phy->cphy_mode)
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_CTRL, BIT(6));
+
/* Enable LDO */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_0, vreg_ctrl_0);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, 0x5c);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, vreg_ctrl_1);
+
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_3, 0x00);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL,
glbl_str_swi_cal_sel_ctrl);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_HSTX_STR_CTRL_0,
glbl_hstx_str_ctrl_0);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0, 0x00);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0,
+ glbl_pemph_ctrl_0);
+ if (phy->cphy_mode)
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_1, 0x01);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL,
glbl_rescode_top_ctrl);
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL,
@@ -892,10 +936,11 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
/* Remove power down from all blocks */
dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, 0x7f);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, 0x1f);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, lane_ctrl0);
/* Select full-rate mode */
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
+ if (!phy->cphy_mode)
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
ret = dsi_7nm_set_usecase(phy);
if (ret) {
@@ -905,22 +950,36 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
}
/* DSI PHY timings */
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
- timing->shared_timings.clk_pre);
- dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
- timing->shared_timings.clk_post);
+ if (phy->cphy_mode) {
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5,
+ timing->shared_timings.clk_pre);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->clk_prepare);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7,
+ timing->shared_timings.clk_post);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
+ } else {
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
+ timing->shared_timings.clk_pre);
+ dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
+ timing->shared_timings.clk_post);
+ }
/* DSI lane settings */
dsi_phy_hw_v4_0_lane_settings(phy);
--
2.26.1
Document qcom,dsi-phy-cphy-mode option, which can be used to control
whether DSI will operate in D-PHY (default) or C-PHY mode.
Signed-off-by: Jonathan Marek <[email protected]>
---
Documentation/devicetree/bindings/display/msm/dsi.txt | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/devicetree/bindings/display/msm/dsi.txt b/Documentation/devicetree/bindings/display/msm/dsi.txt
index b9a64d3ff184..7ffc86a9816b 100644
--- a/Documentation/devicetree/bindings/display/msm/dsi.txt
+++ b/Documentation/devicetree/bindings/display/msm/dsi.txt
@@ -124,6 +124,7 @@ Required properties:
Optional properties:
- qcom,dsi-phy-regulator-ldo-mode: Boolean value indicating if the LDO mode PHY
regulator is wanted.
+- qcom,dsi-phy-cphy-mode: Boolean value indicating if CPHY mode is wanted.
- qcom,mdss-mdp-transfer-time-us: Specifies the dsi transfer time for command mode
panels in microseconds. Driver uses this number to adjust
the clock rate according to the expected transfer time.
--
2.26.1
On Fri, 23 Apr 2021 at 20:28, Jonathan Marek <[email protected]> wrote:
>
> Add the required changes to support 7nm pll/phy in CPHY mode.
>
> This adds a "qcom,dsi-phy-cphy-mode" property for the PHY node to enable
> the CPHY mode.
>
> Signed-off-by: Jonathan Marek <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
> ---
> drivers/gpu/drm/msm/dsi/dsi.xml.h | 2 +
> drivers/gpu/drm/msm/dsi/dsi_host.c | 34 ++++-
> drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 47 +++++++
> drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 3 +
> drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c | 147 +++++++++++++++-------
> 5 files changed, 185 insertions(+), 48 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.xml.h b/drivers/gpu/drm/msm/dsi/dsi.xml.h
> index 50eb4d1b8fdd..5087a65d3e11 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.xml.h
> +++ b/drivers/gpu/drm/msm/dsi/dsi.xml.h
> @@ -621,6 +621,8 @@ static inline uint32_t DSI_VERSION_MAJOR(uint32_t val)
> return ((val) << DSI_VERSION_MAJOR__SHIFT) & DSI_VERSION_MAJOR__MASK;
> }
>
> +#define REG_DSI_CPHY_MODE_CTRL 0x000002d4
> +
> #define REG_DSI_PHY_PLL_CTRL_0 0x00000200
> #define DSI_PHY_PLL_CTRL_0_ENABLE 0x00000001
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 8a10e4343281..ab8a8d408d50 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -27,6 +27,7 @@
> #include "dsi_cfg.h"
> #include "msm_kms.h"
> #include "msm_gem.h"
> +#include "phy/dsi_phy.h"
>
> #define DSI_RESET_TOGGLE_DELAY_MS 20
>
> @@ -168,6 +169,9 @@ struct msm_dsi_host {
> int dlane_swap;
> int num_data_lanes;
>
> + /* from phy DT */
> + bool cphy_mode;
> +
> u32 dma_cmd_ctrl_restore;
>
> bool registered;
> @@ -511,6 +515,7 @@ int msm_dsi_runtime_resume(struct device *dev)
>
> int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
> {
> + u32 byte_intf_rate;
> int ret;
>
> DBG("Set clk rates: pclk=%d, byteclk=%d",
> @@ -530,8 +535,13 @@ int dsi_link_clk_set_rate_6g(struct msm_dsi_host *msm_host)
> }
>
> if (msm_host->byte_intf_clk) {
> - ret = clk_set_rate(msm_host->byte_intf_clk,
> - msm_host->byte_clk_rate / 2);
> + /* For CPHY, byte_intf_clk is same as byte_clk */
> + if (msm_host->cphy_mode)
> + byte_intf_rate = msm_host->byte_clk_rate;
> + else
> + byte_intf_rate = msm_host->byte_clk_rate / 2;
> +
> + ret = clk_set_rate(msm_host->byte_intf_clk, byte_intf_rate);
> if (ret) {
> pr_err("%s: Failed to set rate byte intf clk, %d\n",
> __func__, ret);
> @@ -711,7 +721,11 @@ static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_dual_dsi)
> lanes = 1;
> }
>
> - do_div(pclk_bpp, (8 * lanes));
> + /* CPHY "byte_clk" is in units of 16 bits */
> + if (msm_host->cphy_mode)
> + do_div(pclk_bpp, (16 * lanes));
> + else
> + do_div(pclk_bpp, (8 * lanes));
>
> msm_host->pixel_clk_rate = pclk_rate;
> msm_host->byte_clk_rate = pclk_bpp;
> @@ -937,6 +951,9 @@ static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
> data |= DSI_CTRL_ENABLE;
>
> dsi_write(msm_host, REG_DSI_CTRL, data);
> +
> + if (msm_host->cphy_mode)
> + dsi_write(msm_host, REG_DSI_CPHY_MODE_CTRL, BIT(0));
> }
>
> static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_dual_dsi)
> @@ -2230,6 +2247,8 @@ int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
> struct clk *byte_clk_provider, *pixel_clk_provider;
> int ret;
>
> + msm_host->cphy_mode = src_phy->cphy_mode;
> +
> ret = msm_dsi_phy_get_clk_provider(src_phy,
> &byte_clk_provider, &pixel_clk_provider);
> if (ret) {
> @@ -2301,7 +2320,14 @@ void msm_dsi_host_get_phy_clk_req(struct mipi_dsi_host *host,
> return;
> }
>
> - clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
> + /* CPHY transmits 16 bits over 7 clock cycles
> + * "byte_clk" is in units of 16-bits (see dsi_calc_pclk),
> + * so multiply by 7 to get the "bitclk rate"
> + */
> + if (msm_host->cphy_mode)
> + clk_req->bitclk_rate = msm_host->byte_clk_rate * 7;
> + else
> + clk_req->bitclk_rate = msm_host->byte_clk_rate * 8;
> clk_req->escclk_rate = msm_host->esc_clk_rate;
> }
>
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> index ff7f2ec42030..5dd9dc4d81e2 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.c
> @@ -461,6 +461,51 @@ int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> return 0;
> }
>
> +int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> + struct msm_dsi_phy_clk_request *clk_req)
> +{
> + const unsigned long bit_rate = clk_req->bitclk_rate;
> + const unsigned long esc_rate = clk_req->escclk_rate;
> + s32 ui, ui_x7;
> + s32 tmax, tmin;
> + s32 coeff = 1000; /* Precision, should avoid overflow */
> + s32 temp;
> +
> + if (!bit_rate || !esc_rate)
> + return -EINVAL;
> +
> + ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000);
> + ui_x7 = ui * 7;
> +
> + temp = S_DIV_ROUND_UP(38 * coeff, ui_x7);
> + tmin = max_t(s32, temp, 0);
> + temp = (95 * coeff) / ui_x7;
> + tmax = max_t(s32, temp, 0);
> + timing->clk_prepare = linear_inter(tmax, tmin, 50, 0, false);
> +
> + tmin = DIV_ROUND_UP(50 * coeff, ui_x7);
> + tmax = 255;
> + timing->hs_rqst = linear_inter(tmax, tmin, 1, 0, false);
> +
> + tmin = DIV_ROUND_UP(100 * coeff, ui_x7) - 1;
> + tmax = 255;
> + timing->hs_exit = linear_inter(tmax, tmin, 10, 0, false);
> +
> + tmin = 1;
> + tmax = 32;
> + timing->shared_timings.clk_post = linear_inter(tmax, tmin, 80, 0, false);
> +
> + tmin = min_t(s32, 64, S_DIV_ROUND_UP(262 * coeff, ui_x7) - 1);
> + tmax = 64;
> + timing->shared_timings.clk_pre = linear_inter(tmax, tmin, 20, 0, false);
> +
> + DBG("%d, %d, %d, %d, %d",
> + timing->shared_timings.clk_pre, timing->shared_timings.clk_post,
> + timing->clk_prepare, timing->hs_exit, timing->hs_rqst);
> +
> + return 0;
> +}
> +
> static int dsi_phy_regulator_init(struct msm_dsi_phy *phy)
> {
> struct regulator_bulk_data *s = phy->supplies;
> @@ -657,6 +702,8 @@ static int dsi_phy_driver_probe(struct platform_device *pdev)
>
> phy->regulator_ldo_mode = of_property_read_bool(dev->of_node,
> "qcom,dsi-phy-regulator-ldo-mode");
> + phy->cphy_mode = of_property_read_bool(dev->of_node,
> + "qcom,dsi-phy-cphy-mode");
>
> phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
> if (IS_ERR(phy->base)) {
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> index 94a77ac364d3..432e9a9de52f 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h
> @@ -95,6 +95,7 @@ struct msm_dsi_phy {
>
> enum msm_dsi_phy_usecase usecase;
> bool regulator_ldo_mode;
> + bool cphy_mode;
>
> struct clk_hw *vco_hw;
> bool pll_on;
> @@ -115,5 +116,7 @@ int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
> struct msm_dsi_phy_clk_request *clk_req);
> int msm_dsi_dphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> struct msm_dsi_phy_clk_request *clk_req);
> +int msm_dsi_cphy_timing_calc_v4(struct msm_dsi_dphy_timing *timing,
> + struct msm_dsi_phy_clk_request *clk_req);
>
> #endif /* __DSI_PHY_H__ */
> diff --git a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> index e76ce40a12ab..40b791ea7bb9 100644
> --- a/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> +++ b/drivers/gpu/drm/msm/dsi/phy/dsi_phy_7nm.c
> @@ -255,7 +255,7 @@ static void dsi_pll_commit(struct dsi_pll_7nm *pll, struct dsi_pll_config *confi
> (config->frac_div_start & 0x30000) >> 16);
> dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCKDET_RATE_1, 0x40);
> dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_PLL_LOCK_DELAY, 0x06);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, 0x10); /* TODO: 0x00 for CPHY */
> + dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_CMODE_1, pll->phy->cphy_mode ? 0x00 : 0x10);
> dsi_phy_write(base + REG_DSI_7nm_PHY_PLL_CLOCK_INVERTERS, config->pll_clock_inverters);
> }
>
> @@ -640,7 +640,8 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm, struct clk_hw **provide
>
> /* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
> hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
> - CLK_SET_RATE_PARENT, 1, 8);
> + CLK_SET_RATE_PARENT, 1,
> + pll_7nm->phy->cphy_mode ? 7 : 8);
> if (IS_ERR(hw)) {
> ret = PTR_ERR(hw);
> goto fail;
> @@ -661,32 +662,47 @@ static int pll_7nm_register(struct dsi_pll_7nm *pll_7nm, struct clk_hw **provide
> snprintf(clk_name, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
> snprintf(parent, 32, "dsi%d_pll_out_div_clk", pll_7nm->phy->id);
>
> - hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
> - 0, 1, 4);
> + if (pll_7nm->phy->cphy_mode)
> + hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 2, 7);
> + else
> + hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 4);
> if (IS_ERR(hw)) {
> ret = PTR_ERR(hw);
> goto fail;
> }
>
> - snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
> - snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->phy->id);
> - snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->phy->id);
> - snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->phy->id);
> - snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
> -
> - hw = devm_clk_hw_register_mux(dev, clk_name,
> - ((const char *[]){
> - parent, parent2, parent3, parent4
> - }), 4, 0, pll_7nm->phy->base +
> - REG_DSI_7nm_PHY_CMN_CLK_CFG1,
> - 0, 2, 0, NULL);
> - if (IS_ERR(hw)) {
> - ret = PTR_ERR(hw);
> - goto fail;
> - }
> + /* in CPHY mode, pclk_mux will always have post_out_div as parent
> + * don't register a pclk_mux clock and just use post_out_div instead
> + */
> + if (pll_7nm->phy->cphy_mode) {
> + u32 data;
> +
> + data = dsi_phy_read(pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_CLK_CFG1);
> + dsi_phy_write(pll_7nm->phy->base + REG_DSI_7nm_PHY_CMN_CLK_CFG1, data | 3);
> +
> + snprintf(parent, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
> + } else {
> + snprintf(clk_name, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
> + snprintf(parent, 32, "dsi%d_pll_bit_clk", pll_7nm->phy->id);
> + snprintf(parent2, 32, "dsi%d_pll_by_2_bit_clk", pll_7nm->phy->id);
> + snprintf(parent3, 32, "dsi%d_pll_out_div_clk", pll_7nm->phy->id);
> + snprintf(parent4, 32, "dsi%d_pll_post_out_div_clk", pll_7nm->phy->id);
> +
> + hw = devm_clk_hw_register_mux(dev, clk_name,
> + ((const char *[]){
> + parent, parent2, parent3, parent4
> + }), 4, 0, pll_7nm->phy->base +
> + REG_DSI_7nm_PHY_CMN_CLK_CFG1,
> + 0, 2, 0, NULL);
> + if (IS_ERR(hw)) {
> + ret = PTR_ERR(hw);
> + goto fail;
> + }
> +
> + snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
> + }
>
> snprintf(clk_name, 32, "dsi%d_phy_pll_out_dsiclk", pll_7nm->phy->id);
> - snprintf(parent, 32, "dsi%d_pclk_mux", pll_7nm->phy->id);
>
> /* PIX CLK DIV : DIV_CTRL_7_4*/
> hw = devm_clk_hw_register_divider(dev, clk_name, parent,
> @@ -811,15 +827,21 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> struct msm_dsi_dphy_timing *timing = &phy->timing;
> void __iomem *base = phy->base;
> bool less_than_1500_mhz;
> - u32 vreg_ctrl_0, glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
> + u32 vreg_ctrl_0, vreg_ctrl_1, lane_ctrl0;
> + u32 glbl_pemph_ctrl_0;
> + u32 glbl_str_swi_cal_sel_ctrl, glbl_hstx_str_ctrl_0;
> u32 glbl_rescode_top_ctrl, glbl_rescode_bot_ctrl;
> u32 data;
>
> DBG("");
>
> - if (msm_dsi_dphy_timing_calc_v4(timing, clk_req)) {
> + if (phy->cphy_mode)
> + ret = msm_dsi_cphy_timing_calc_v4(timing, clk_req);
> + else
> + ret = msm_dsi_dphy_timing_calc_v4(timing, clk_req);
> + if (ret) {
> DRM_DEV_ERROR(&phy->pdev->dev,
> - "%s: D-PHY timing calculation failed\n", __func__);
> + "%s: PHY timing calculation failed\n", __func__);
> return -EINVAL;
> }
>
> @@ -840,6 +862,10 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> /* Alter PHY configurations if data rate less than 1.5GHZ*/
> less_than_1500_mhz = (clk_req->bitclk_rate <= 1500000000);
>
> + /* For C-PHY, no low power settings for lower clk rate */
> + if (phy->cphy_mode)
> + less_than_1500_mhz = false;
> +
> if (phy->cfg->quirks & DSI_PHY_7NM_QUIRK_V4_1) {
> vreg_ctrl_0 = less_than_1500_mhz ? 0x53 : 0x52;
> glbl_rescode_top_ctrl = less_than_1500_mhz ? 0x3d : 0x00;
> @@ -854,6 +880,17 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> glbl_rescode_bot_ctrl = 0x3c;
> }
>
> + if (phy->cphy_mode) {
> + vreg_ctrl_0 = 0x51;
> + vreg_ctrl_1 = 0x55;
> + glbl_pemph_ctrl_0 = 0x11;
> + lane_ctrl0 = 0x17;
> + } else {
> + vreg_ctrl_1 = 0x5c;
> + glbl_pemph_ctrl_0 = 0x00;
> + lane_ctrl0 = 0x1f;
> + }
> +
> /* de-assert digital and pll power down */
> data = BIT(6) | BIT(5);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, data);
> @@ -874,15 +911,22 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG0, 0x21);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CFG1, 0x84);
>
> + if (phy->cphy_mode)
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_CTRL, BIT(6));
> +
> /* Enable LDO */
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_0, vreg_ctrl_0);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, 0x5c);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_VREG_CTRL_1, vreg_ctrl_1);
> +
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_3, 0x00);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_STR_SWI_CAL_SEL_CTRL,
> glbl_str_swi_cal_sel_ctrl);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_HSTX_STR_CTRL_0,
> glbl_hstx_str_ctrl_0);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_0,
> + glbl_pemph_ctrl_0);
> + if (phy->cphy_mode)
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_PEMPH_CTRL_1, 0x01);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_TOP_CTRL,
> glbl_rescode_top_ctrl);
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_GLBL_RESCODE_OFFSET_BOT_CTRL,
> @@ -892,10 +936,11 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> /* Remove power down from all blocks */
> dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_0, 0x7f);
>
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, 0x1f);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_LANE_CTRL0, lane_ctrl0);
>
> /* Select full-rate mode */
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
> + if (!phy->cphy_mode)
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_CTRL_2, 0x40);
>
> ret = dsi_7nm_set_usecase(phy);
> if (ret) {
> @@ -905,22 +950,36 @@ static int dsi_7nm_phy_enable(struct msm_dsi_phy *phy,
> }
>
> /* DSI PHY timings */
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
> - timing->shared_timings.clk_pre);
> - dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
> - timing->shared_timings.clk_post);
> + if (phy->cphy_mode) {
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5,
> + timing->shared_timings.clk_pre);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->clk_prepare);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7,
> + timing->shared_timings.clk_post);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
> + } else {
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_0, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_1, timing->clk_zero);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_2, timing->clk_prepare);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_3, timing->clk_trail);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_4, timing->hs_exit);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_5, timing->hs_zero);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_6, timing->hs_prepare);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_7, timing->hs_trail);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_8, timing->hs_rqst);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_9, 0x02);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_10, 0x04);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_11, 0x00);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_12,
> + timing->shared_timings.clk_pre);
> + dsi_phy_write(base + REG_DSI_7nm_PHY_CMN_TIMING_CTRL_13,
> + timing->shared_timings.clk_post);
> + }
>
> /* DSI lane settings */
> dsi_phy_hw_v4_0_lane_settings(phy);
> --
> 2.26.1
>
--
With best wishes
Dmitry
On Fri, Apr 23, 2021 at 01:24:40PM -0400, Jonathan Marek wrote:
> Document qcom,dsi-phy-cphy-mode option, which can be used to control
> whether DSI will operate in D-PHY (default) or C-PHY mode.
Given this is a standard MIPI thing, I think this needs to be a common
property. We already have phy bindings that use the phy cells to set the
phy type which I think you should use here. See
include/dt-bindings/phy/phy.h.
>
> Signed-off-by: Jonathan Marek <[email protected]>
> ---
> Documentation/devicetree/bindings/display/msm/dsi.txt | 1 +
> 1 file changed, 1 insertion(+)
Note that this file is in the process of being converted to schema.
That's been going on for at least the last year... :(
On 5/3/21 1:11 PM, Rob Herring wrote:
> On Fri, Apr 23, 2021 at 01:24:40PM -0400, Jonathan Marek wrote:
>> Document qcom,dsi-phy-cphy-mode option, which can be used to control
>> whether DSI will operate in D-PHY (default) or C-PHY mode.
>
> Given this is a standard MIPI thing, I think this needs to be a common
> property. We already have phy bindings that use the phy cells to set the
> phy type which I think you should use here. See
> include/dt-bindings/phy/phy.h.
>
Is it OK to simply change the option to something like "phy-mode =
<PHY_TYPE_DSI_CPHY>;"?
(using phy-cells would be annoying to implement, with no benefit IMO)
On 28/05/2021 15:57, Jonathan Marek wrote:
> On 5/3/21 1:11 PM, Rob Herring wrote:
>> On Fri, Apr 23, 2021 at 01:24:40PM -0400, Jonathan Marek wrote:
>>> Document qcom,dsi-phy-cphy-mode option, which can be used to control
>>> whether DSI will operate in D-PHY (default) or C-PHY mode.
>>
>> Given this is a standard MIPI thing, I think this needs to be a common
>> property. We already have phy bindings that use the phy cells to set the
>> phy type which I think you should use here. See
>> include/dt-bindings/phy/phy.h.
>>
>
> Is it OK to simply change the option to something like "phy-mode =
> <PHY_TYPE_DSI_CPHY>;"?
>
> (using phy-cells would be annoying to implement, with no benefit IMO)
To add another feather to the balance scales:
- `phys = <&dsi0_phy PHY_TYPE_DSI_CPHY>;` would bring knowledge about
PHY mode to the DSI host (which does not really care about PHY mode)
- `phy-mode = <PHY_TYPE_DSI_CPHY>;` would stay in the PHY node, where
this information belongs.
--
With best wishes
Dmitry