From: "Angelo G. Del Regno" <kholk11@xxxxxxxxx>
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@xxxxxxxxx>
---
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;
/*
--
2.21.0
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