Re: [Freedreno] [PATCH v2 1/2] drm/msm/dp: Add support for SC7280 eDP
Hi Stephen, On 2021-10-21 23:32, Stephen Boyd wrote: Quoting Sankeerth Billakanti (2021-10-20 05:14:10) diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 62e75dc..9fea49c 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1238,9 +1240,21 @@ static int dp_ctrl_link_train(struct dp_ctrl_private *ctrl, link_info.capabilities = DP_LINK_CAP_ENHANCED_FRAMING; dp_aux_link_configure(ctrl->aux, _info); + + if (dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) { Please add a static inline macro in include/drm/drm_dp_helper.h that makes this more readable. Something similar to drm_dp_is_branch() but with a human readable replacement for "is_branch". Maybe drm_dp_ssc()? Okay, I will add a macro, drm_dp_max_downspread (to be consistent with the spec and other macros in the file) in drm_dp_helper.h file. + ssc = DP_SPREAD_AMP_0_5; + drm_dp_dpcd_write(ctrl->aux, DP_DOWNSPREAD_CTRL, , 1); + } + drm_dp_dpcd_write(ctrl->aux, DP_MAIN_LINK_CHANNEL_CODING_SET, , 1); + if (dpcd[DP_EDP_CONFIGURATION_CAP] & DP_ALTERNATE_SCRAMBLER_RESET_CAP) { And this one already has a helper, drm_dp_alternate_scrambler_reset_cap(). Okay, I will use that. + assr = DP_ALTERNATE_SCRAMBLER_RESET_ENABLE; + drm_dp_dpcd_write(ctrl->aux, DP_EDP_CONFIGURATION_SET, + , 1); + } + ret = dp_ctrl_link_train_1(ctrl, training_step); if (ret) { DRM_ERROR("link training #1 failed. ret=%d\n", ret); @@ -1312,9 +1326,11 @@ static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl) struct dp_io *dp_io = >parser->io; struct phy *phy = dp_io->phy; struct phy_configure_opts_dp *opts_dp = _io->phy_opts.dp; + const u8 *dpcd = ctrl->panel->dpcd; opts_dp->lanes = ctrl->link->link_params.num_lanes; opts_dp->link_rate = ctrl->link->link_params.rate / 100; + opts_dp->ssc = dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5; dp_ctrl_set_clock_rate(ctrl, DP_CTRL_PM, "ctrl_link", ctrl->link->link_params.rate * 1000); @@ -1406,7 +1422,7 @@ void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl) { - u8 *dpcd = ctrl->panel->dpcd; + const u8 *dpcd = ctrl->panel->dpcd; /* * For better interop experience, used a fixed NVID=0x8000 diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index c867745..c16311b 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -144,8 +144,16 @@ static const struct msm_dp_config sc8180x_dp_cfg = { .num_descs = 3, }; +static const struct msm_dp_config sc7280_dp_cfg = { + .descs = (struct msm_dp_desc[]) { const Will add it. + { .io_start = 0x0aea, .connector_type = DRM_MODE_CONNECTOR_eDP }, + }, + .num_descs = 1, +}; + static const struct of_device_id dp_dt_match[] = { { .compatible = "qcom,sc7180-dp", .data = _dp_cfg }, + { .compatible = "qcom,sc7280-edp", .data = _dp_cfg }, { .compatible = "qcom,sc8180x-dp", .data = _dp_cfg }, { .compatible = "qcom,sc8180x-edp", .data = _dp_cfg }, {} @@ -1440,7 +1448,7 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display) dp_hpd_event_setup(dp); - dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100); + dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 1); This has no explanation. What is it? Will add explanation for it as a comment.
Re: [Freedreno] [PATCH v2 1/2] drm/msm/dp: Add support for SC7280 eDP
Quoting Sankeerth Billakanti (2021-10-20 05:14:10) > diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c > b/drivers/gpu/drm/msm/dp/dp_ctrl.c > index 62e75dc..9fea49c 100644 > --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c > +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c > @@ -1238,9 +1240,21 @@ static int dp_ctrl_link_train(struct dp_ctrl_private > *ctrl, > link_info.capabilities = DP_LINK_CAP_ENHANCED_FRAMING; > > dp_aux_link_configure(ctrl->aux, _info); > + > + if (dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) { Please add a static inline macro in include/drm/drm_dp_helper.h that makes this more readable. Something similar to drm_dp_is_branch() but with a human readable replacement for "is_branch". Maybe drm_dp_ssc()? > + ssc = DP_SPREAD_AMP_0_5; > + drm_dp_dpcd_write(ctrl->aux, DP_DOWNSPREAD_CTRL, , 1); > + } > + > drm_dp_dpcd_write(ctrl->aux, DP_MAIN_LINK_CHANNEL_CODING_SET, > , 1); > > + if (dpcd[DP_EDP_CONFIGURATION_CAP] & > DP_ALTERNATE_SCRAMBLER_RESET_CAP) { And this one already has a helper, drm_dp_alternate_scrambler_reset_cap(). > + assr = DP_ALTERNATE_SCRAMBLER_RESET_ENABLE; > + drm_dp_dpcd_write(ctrl->aux, DP_EDP_CONFIGURATION_SET, > + , 1); > + } > + > ret = dp_ctrl_link_train_1(ctrl, training_step); > if (ret) { > DRM_ERROR("link training #1 failed. ret=%d\n", ret); > @@ -1312,9 +1326,11 @@ static int dp_ctrl_enable_mainlink_clocks(struct > dp_ctrl_private *ctrl) > struct dp_io *dp_io = >parser->io; > struct phy *phy = dp_io->phy; > struct phy_configure_opts_dp *opts_dp = _io->phy_opts.dp; > + const u8 *dpcd = ctrl->panel->dpcd; > > opts_dp->lanes = ctrl->link->link_params.num_lanes; > opts_dp->link_rate = ctrl->link->link_params.rate / 100; > + opts_dp->ssc = dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5; > dp_ctrl_set_clock_rate(ctrl, DP_CTRL_PM, "ctrl_link", > ctrl->link->link_params.rate * 1000); > > @@ -1406,7 +1422,7 @@ void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) > > static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl) > { > - u8 *dpcd = ctrl->panel->dpcd; > + const u8 *dpcd = ctrl->panel->dpcd; > > /* > * For better interop experience, used a fixed NVID=0x8000 > diff --git a/drivers/gpu/drm/msm/dp/dp_display.c > b/drivers/gpu/drm/msm/dp/dp_display.c > index c867745..c16311b 100644 > --- a/drivers/gpu/drm/msm/dp/dp_display.c > +++ b/drivers/gpu/drm/msm/dp/dp_display.c > @@ -144,8 +144,16 @@ static const struct msm_dp_config sc8180x_dp_cfg = { > .num_descs = 3, > }; > > +static const struct msm_dp_config sc7280_dp_cfg = { > + .descs = (struct msm_dp_desc[]) { const > + { .io_start = 0x0aea, .connector_type = > DRM_MODE_CONNECTOR_eDP }, > + }, > + .num_descs = 1, > +}; > + > static const struct of_device_id dp_dt_match[] = { > { .compatible = "qcom,sc7180-dp", .data = _dp_cfg }, > + { .compatible = "qcom,sc7280-edp", .data = _dp_cfg }, > { .compatible = "qcom,sc8180x-dp", .data = _dp_cfg }, > { .compatible = "qcom,sc8180x-edp", .data = _dp_cfg }, > {} > @@ -1440,7 +1448,7 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display) > > dp_hpd_event_setup(dp); > > - dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 100); > + dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 1); This has no explanation. What is it?
[Freedreno] [PATCH v2 1/2] drm/msm/dp: Add support for SC7280 eDP
From: Sankeerth Billakanti The eDP controller on SC7280 is similar to the eDP/DP controllers supported by the current driver implementation. SC7280 supports one EDP and one DP controller which can operate concurrently. The following are some required changes to support eDP on sc7280: 1. SC7280 eDP support in the dp_display driver. 2. ASSR support programming for the sink device. 3. SSC support programming for the sink device. Signed-off-by: Sankeerth Billakanti --- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 4 ++-- drivers/gpu/drm/msm/dp/dp_ctrl.c | 20 ++-- drivers/gpu/drm/msm/dp/dp_display.c| 10 +- 3 files changed, 29 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c index ce6f32a..516cc19 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c @@ -856,9 +856,9 @@ static const struct dpu_intf_cfg sm8150_intf[] = { }; static const struct dpu_intf_cfg sc7280_intf[] = { - INTF_BLK("intf_0", INTF_0, 0x34000, INTF_DP, 0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 24, 25), + INTF_BLK("intf_0", INTF_0, 0x34000, INTF_DP, 1, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 24, 25), INTF_BLK("intf_1", INTF_1, 0x35000, INTF_DSI, 0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 26, 27), - INTF_BLK("intf_5", INTF_5, 0x39000, INTF_EDP, 0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 22, 23), + INTF_BLK("intf_5", INTF_5, 0x39000, INTF_DP, 0, 24, INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 22, 23), }; /* diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 62e75dc..9fea49c 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -119,7 +119,7 @@ void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl) static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl) { u32 config = 0, tbd; - u8 *dpcd = ctrl->panel->dpcd; + const u8 *dpcd = ctrl->panel->dpcd; /* Default-> LSCLK DIV: 1/4 LCLK */ config |= (2 << DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT); @@ -1228,7 +1228,9 @@ static int dp_ctrl_link_train(struct dp_ctrl_private *ctrl, int *training_step) { int ret = 0; + const u8 *dpcd = ctrl->panel->dpcd; u8 encoding = DP_SET_ANSI_8B10B; + u8 ssc, assr; struct dp_link_info link_info = {0}; dp_ctrl_config_ctrl(ctrl); @@ -1238,9 +1240,21 @@ static int dp_ctrl_link_train(struct dp_ctrl_private *ctrl, link_info.capabilities = DP_LINK_CAP_ENHANCED_FRAMING; dp_aux_link_configure(ctrl->aux, _info); + + if (dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) { + ssc = DP_SPREAD_AMP_0_5; + drm_dp_dpcd_write(ctrl->aux, DP_DOWNSPREAD_CTRL, , 1); + } + drm_dp_dpcd_write(ctrl->aux, DP_MAIN_LINK_CHANNEL_CODING_SET, , 1); + if (dpcd[DP_EDP_CONFIGURATION_CAP] & DP_ALTERNATE_SCRAMBLER_RESET_CAP) { + assr = DP_ALTERNATE_SCRAMBLER_RESET_ENABLE; + drm_dp_dpcd_write(ctrl->aux, DP_EDP_CONFIGURATION_SET, + , 1); + } + ret = dp_ctrl_link_train_1(ctrl, training_step); if (ret) { DRM_ERROR("link training #1 failed. ret=%d\n", ret); @@ -1312,9 +1326,11 @@ static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl) struct dp_io *dp_io = >parser->io; struct phy *phy = dp_io->phy; struct phy_configure_opts_dp *opts_dp = _io->phy_opts.dp; + const u8 *dpcd = ctrl->panel->dpcd; opts_dp->lanes = ctrl->link->link_params.num_lanes; opts_dp->link_rate = ctrl->link->link_params.rate / 100; + opts_dp->ssc = dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5; dp_ctrl_set_clock_rate(ctrl, DP_CTRL_PM, "ctrl_link", ctrl->link->link_params.rate * 1000); @@ -1406,7 +1422,7 @@ void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl) { - u8 *dpcd = ctrl->panel->dpcd; + const u8 *dpcd = ctrl->panel->dpcd; /* * For better interop experience, used a fixed NVID=0x8000 diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index c867745..c16311b 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -144,8 +144,16 @@ static const struct msm_dp_config sc8180x_dp_cfg = { .num_descs = 3, }; +static const struct msm_dp_config sc7280_dp_cfg = { + .descs = (struct msm_dp_desc[]) { + { .io_start = 0x0aea, .connector_type = DRM_MODE_CONNECTOR_eDP }, + }, + .num_descs = 1, +}; + static const struct of_device_id
Re: [Freedreno] [PATCH v2 1/2] drm/msm/dp: Add support for SC7280 eDP
On Wed, 20 Oct 2021 at 15:14, Sankeerth Billakanti wrote: > > From: Sankeerth Billakanti > > The eDP controller on SC7280 is similar to the eDP/DP controllers > supported by the current driver implementation. > > SC7280 supports one EDP and one DP controller which can operate > concurrently. > > The following are some required changes to support eDP on sc7280: > 1. SC7280 eDP support in the dp_display driver. > 2. ASSR support programming for the sink device. > 3. SSC support programming for the sink device. Please split your patch according to these changes. Each item should go in a separate patch. > > Signed-off-by: Sankeerth Billakanti > --- > drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 4 ++-- > drivers/gpu/drm/msm/dp/dp_ctrl.c | 20 ++-- > drivers/gpu/drm/msm/dp/dp_display.c| 10 +- > 3 files changed, 29 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c > b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c > index ce6f32a..516cc19 100644 > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c > @@ -856,9 +856,9 @@ static const struct dpu_intf_cfg sm8150_intf[] = { > }; > > static const struct dpu_intf_cfg sc7280_intf[] = { > - INTF_BLK("intf_0", INTF_0, 0x34000, INTF_DP, 0, 24, INTF_SC7280_MASK, > MDP_SSPP_TOP0_INTR, 24, 25), > + INTF_BLK("intf_0", INTF_0, 0x34000, INTF_DP, 1, 24, INTF_SC7280_MASK, > MDP_SSPP_TOP0_INTR, 24, 25), > INTF_BLK("intf_1", INTF_1, 0x35000, INTF_DSI, 0, 24, > INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 26, 27), > - INTF_BLK("intf_5", INTF_5, 0x39000, INTF_EDP, 0, 24, > INTF_SC7280_MASK, MDP_SSPP_TOP0_INTR, 22, 23), > + INTF_BLK("intf_5", INTF_5, 0x39000, INTF_DP, 0, 24, INTF_SC7280_MASK, > MDP_SSPP_TOP0_INTR, 22, 23), Why does intf_0 receive index 1? I think you have a mistake in the dp_descs below. Also note that the latest patch started using MSM_DP_CONTROLLER_n symbols instead of using raw numbers. > }; > > /* > diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c > b/drivers/gpu/drm/msm/dp/dp_ctrl.c > index 62e75dc..9fea49c 100644 > --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c > +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c > @@ -119,7 +119,7 @@ void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl) > static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl) > { > u32 config = 0, tbd; > - u8 *dpcd = ctrl->panel->dpcd; > + const u8 *dpcd = ctrl->panel->dpcd; > > /* Default-> LSCLK DIV: 1/4 LCLK */ > config |= (2 << DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT); > @@ -1228,7 +1228,9 @@ static int dp_ctrl_link_train(struct dp_ctrl_private > *ctrl, > int *training_step) > { > int ret = 0; > + const u8 *dpcd = ctrl->panel->dpcd; > u8 encoding = DP_SET_ANSI_8B10B; > + u8 ssc, assr; > struct dp_link_info link_info = {0}; > > dp_ctrl_config_ctrl(ctrl); > @@ -1238,9 +1240,21 @@ static int dp_ctrl_link_train(struct dp_ctrl_private > *ctrl, > link_info.capabilities = DP_LINK_CAP_ENHANCED_FRAMING; > > dp_aux_link_configure(ctrl->aux, _info); > + > + if (dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5) { > + ssc = DP_SPREAD_AMP_0_5; > + drm_dp_dpcd_write(ctrl->aux, DP_DOWNSPREAD_CTRL, , 1); > + } > + > drm_dp_dpcd_write(ctrl->aux, DP_MAIN_LINK_CHANNEL_CODING_SET, > , 1); > > + if (dpcd[DP_EDP_CONFIGURATION_CAP] & > DP_ALTERNATE_SCRAMBLER_RESET_CAP) { > + assr = DP_ALTERNATE_SCRAMBLER_RESET_ENABLE; > + drm_dp_dpcd_write(ctrl->aux, DP_EDP_CONFIGURATION_SET, > + , 1); > + } > + > ret = dp_ctrl_link_train_1(ctrl, training_step); > if (ret) { > DRM_ERROR("link training #1 failed. ret=%d\n", ret); > @@ -1312,9 +1326,11 @@ static int dp_ctrl_enable_mainlink_clocks(struct > dp_ctrl_private *ctrl) > struct dp_io *dp_io = >parser->io; > struct phy *phy = dp_io->phy; > struct phy_configure_opts_dp *opts_dp = _io->phy_opts.dp; > + const u8 *dpcd = ctrl->panel->dpcd; > > opts_dp->lanes = ctrl->link->link_params.num_lanes; > opts_dp->link_rate = ctrl->link->link_params.rate / 100; > + opts_dp->ssc = dpcd[DP_MAX_DOWNSPREAD] & DP_MAX_DOWNSPREAD_0_5; > dp_ctrl_set_clock_rate(ctrl, DP_CTRL_PM, "ctrl_link", > ctrl->link->link_params.rate * 1000); > > @@ -1406,7 +1422,7 @@ void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl) > > static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl) > { > - u8 *dpcd = ctrl->panel->dpcd; > + const u8 *dpcd = ctrl->panel->dpcd; > > /* > * For better interop experience, used a fixed NVID=0x8000 > diff --git