From: "Angelo G. Del Regno" kholk11@gmail.com
Some SoCs, like MSM8956/8976 (and APQ variants), do feature these clocks and we need to enable them in order to get the hardware to properly work.
Signed-off-by: Angelo G. Del Regno kholk11@gmail.com --- Documentation/devicetree/bindings/display/msm/mdp5.txt | 2 ++ drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 10 ++++++++++ drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h | 2 ++ 3 files changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/msm/mdp5.txt b/Documentation/devicetree/bindings/display/msm/mdp5.txt index 4e11338548aa..43d11279c925 100644 --- a/Documentation/devicetree/bindings/display/msm/mdp5.txt +++ b/Documentation/devicetree/bindings/display/msm/mdp5.txt @@ -76,6 +76,8 @@ Required properties: Optional properties: - clock-names: the following clocks are optional: * "lut" + * "tbu" + * "tbu_rt"
Example:
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c index fec6ef1ae3b9..23be9b95dd7e 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c @@ -293,6 +293,10 @@ int mdp5_disable(struct mdp5_kms *mdp5_kms) mdp5_kms->enable_count--; WARN_ON(mdp5_kms->enable_count < 0);
+ if (mdp5_kms->tbu_rt_clk) + clk_disable_unprepare(mdp5_kms->tbu_rt_clk); + if (mdp5_kms->tbu_clk) + clk_disable_unprepare(mdp5_kms->tbu_clk); clk_disable_unprepare(mdp5_kms->ahb_clk); clk_disable_unprepare(mdp5_kms->axi_clk); clk_disable_unprepare(mdp5_kms->core_clk); @@ -313,6 +317,10 @@ int mdp5_enable(struct mdp5_kms *mdp5_kms) clk_prepare_enable(mdp5_kms->core_clk); if (mdp5_kms->lut_clk) clk_prepare_enable(mdp5_kms->lut_clk); + if (mdp5_kms->tbu_clk) + clk_prepare_enable(mdp5_kms->tbu_clk); + if (mdp5_kms->tbu_rt_clk) + clk_prepare_enable(mdp5_kms->tbu_rt_clk);
return 0; } @@ -948,6 +956,8 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev)
/* optional clocks: */ get_clk(pdev, &mdp5_kms->lut_clk, "lut", false); + get_clk(pdev, &mdp5_kms->tbu_clk, "tbu", false); + get_clk(pdev, &mdp5_kms->tbu_rt_clk, "tbu_rt", false);
/* we need to set a default rate before enabling. Set a safe * rate first, then figure out hw revision, and then set a diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h index d1bf4fdfc815..128866742593 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.h @@ -53,6 +53,8 @@ struct mdp5_kms { struct clk *ahb_clk; struct clk *core_clk; struct clk *lut_clk; + struct clk *tbu_clk; + struct clk *tbu_rt_clk; struct clk *vsync_clk;
/*