On Thu, Dec 05, 2024 at 08:31:42PM -0800, Abhinav Kumar wrote:
> Split dp_ctrl_off() into stream and link parts so that for MST
> cases we can control the link and pixel parts separately.
Please start by describing the problem.
>
> Signed-off-by: Abhinav Kumar <quic_abhin...@quicinc.com>
> ---
> drivers/gpu/drm/msm/dp/dp_ctrl.c | 29 +++--------------------------
> drivers/gpu/drm/msm/dp/dp_ctrl.h | 2 +-
> drivers/gpu/drm/msm/dp/dp_display.c | 4 +++-
> 3 files changed, 7 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c
> b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> index
> 118f5ed83e464f9f27f813eb39624f9c3189f5ac..485339eb998cc6c8c1e8ab0a88b5c5d6ef300a1f
> 100644
> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
> @@ -1739,7 +1739,8 @@ static int msm_dp_ctrl_process_phy_test_request(struct
> msm_dp_ctrl_private *ctrl
> * running. Add the global reset just before disabling the
> * link clocks and core clocks.
> */
> - msm_dp_ctrl_off(&ctrl->msm_dp_ctrl);
> + msm_dp_ctrl_stream_clk_off(&ctrl->msm_dp_ctrl);
> + msm_dp_ctrl_off_link(&ctrl->msm_dp_ctrl);
Huh? What happened with the rest of the msm_dp_ctrl_off() code sequence?
It got dropped, but the commit message tells nothing about it.
>
> ret = msm_dp_ctrl_on_link(&ctrl->msm_dp_ctrl);
> if (ret) {
> @@ -2042,7 +2043,7 @@ int msm_dp_ctrl_on_stream(struct msm_dp_ctrl
> *msm_dp_ctrl, struct msm_dp_panel *
> return ret;
> }
>
> -static void msm_dp_ctrl_stream_clk_off(struct msm_dp_ctrl *msm_dp_ctrl)
> +void msm_dp_ctrl_stream_clk_off(struct msm_dp_ctrl *msm_dp_ctrl)
> {
> struct msm_dp_ctrl_private *ctrl;
>
> @@ -2110,30 +2111,6 @@ void msm_dp_ctrl_off_link(struct msm_dp_ctrl
> *msm_dp_ctrl)
> phy, phy->init_count, phy->power_count);
> }
>
> -void msm_dp_ctrl_off(struct msm_dp_ctrl *msm_dp_ctrl)
> -{
> - struct msm_dp_ctrl_private *ctrl;
> - struct phy *phy;
> -
> - ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private,
> msm_dp_ctrl);
> - phy = ctrl->phy;
> -
> - msm_dp_catalog_panel_disable_vsc_sdp(ctrl->catalog);
> -
> - msm_dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
> -
> - msm_dp_catalog_ctrl_reset(ctrl->catalog);
> -
> - msm_dp_ctrl_stream_clk_off(msm_dp_ctrl);
> -
> - dev_pm_opp_set_rate(ctrl->dev, 0);
> - msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl);
> -
> - phy_power_off(phy);
> - drm_dbg_dp(ctrl->drm_dev, "phy=%p init=%d power_on=%d\n",
> - phy, phy->init_count, phy->power_count);
> -}
> -
> irqreturn_t msm_dp_ctrl_isr(struct msm_dp_ctrl *msm_dp_ctrl)
> {
> struct msm_dp_ctrl_private *ctrl;
> diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h
> b/drivers/gpu/drm/msm/dp/dp_ctrl.h
> index
> 547155ffa50fbe2f3a1f2c2e1ee17420daf0f3da..887cf5a866f07cb9038887a0634d3e1a0375879c
> 100644
> --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
> +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
> @@ -22,7 +22,7 @@ int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl,
> struct msm_dp_panel *
> int msm_dp_ctrl_prepare_stream_on(struct msm_dp_ctrl *dp_ctrl, bool
> force_link_train);
> void msm_dp_ctrl_off_link_stream(struct msm_dp_ctrl *msm_dp_ctrl);
> void msm_dp_ctrl_off_link(struct msm_dp_ctrl *msm_dp_ctrl);
> -void msm_dp_ctrl_off(struct msm_dp_ctrl *msm_dp_ctrl);
> +void msm_dp_ctrl_stream_clk_off(struct msm_dp_ctrl *msm_dp_ctrl);
> void msm_dp_ctrl_push_idle(struct msm_dp_ctrl *msm_dp_ctrl);
> irqreturn_t msm_dp_ctrl_isr(struct msm_dp_ctrl *msm_dp_ctrl);
> void msm_dp_ctrl_handle_sink_request(struct msm_dp_ctrl *msm_dp_ctrl);
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
> b/drivers/gpu/drm/msm/dp/dp_display.c
> index
> c059f749c1f204deac9dfb0c56f537f5545d9acb..b0458bbc89e934ca33ed5af3f2a8ebca30b50824
> 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -911,7 +911,9 @@ static int msm_dp_display_disable(struct
> msm_dp_display_private *dp)
> if (dp->link->sink_count == 0)
> msm_dp_ctrl_psm_config(dp->ctrl);
>
> - msm_dp_ctrl_off(dp->ctrl);
> + msm_dp_ctrl_stream_clk_off(dp->ctrl);
> +
> + msm_dp_ctrl_off_link(dp->ctrl);
>
> /* re-init the PHY so that we can listen to Dongle disconnect */
> if (dp->link->sink_count == 0)
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
