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authorArchit Taneja <architt@codeaurora.org>2017-07-28 13:47:07 +0300
committerRob Clark <robdclark@gmail.com>2017-08-02 14:53:46 +0300
commit774e39ee3572272b816f3a0b39dfdbcc70dd47f1 (patch)
tree00872a09f3cc307f4948726ee0ab3b5ba52904cf /drivers/gpu/drm/msm/msm_kms.h
parent0f379b79ab85573f2041c1eb5da9bb0bfcb4fccd (diff)
downloadlinux-774e39ee3572272b816f3a0b39dfdbcc70dd47f1.tar.xz
drm/msm/mdp5: Set up runtime PM for MDSS
MDSS represents the top level wrapper that contains MDP5, DSI, HDMI and other sub-blocks. W.r.t device heirarchy, it's the parent of all these devices. The power domain of this device is actually tied to the GDSC hw. When any sub-device enables its PD, MDSS's PD is also enabled. The suspend/resume ops enable the top level clocks that end at the MDSS boundary. For now, we're letting them all be optional, since the child devices anyway hold a ref to these clocks. Until now, we'd called a runtime_get() during probe, which ensured that the GDSC was always on. Now that we've set up runtime PM for the children devices, we can get rid of this hack. Note: that the MDSS device is the platform_device in msm_drv.c. The msm_runtime_suspend/resume ops call the funcs that enable/disable the top level MDSS clocks. This is different from MDP4, where the platform device created in msm_drv.c represents MDP4 itself. It would have been nicer to hide these differences by adding new kms funcs, but runtime PM needs to be enabled before kms is set up (i.e, msm_kms_init is called). Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_kms.h')
-rw-r--r--drivers/gpu/drm/msm/msm_kms.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index a8f2ba5e5f07..17d5824417ad 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -99,5 +99,7 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev);
struct msm_kms *mdp5_kms_init(struct drm_device *dev);
int msm_mdss_init(struct drm_device *dev);
void msm_mdss_destroy(struct drm_device *dev);
+int msm_mdss_enable(struct msm_mdss *mdss);
+int msm_mdss_disable(struct msm_mdss *mdss);
#endif /* __MSM_KMS_H__ */