[PATCH 07/10] drm/msm: split power control from prepare/complete_commit

Rob Clark
2019-08-29T17:05:14Z

With atomic commit, ->prepare_commit() and ->complete_commit() may not
be evenly balanced (although ->complete_commit() will complete each
crtc that had been previously prepared). So these will no longer be
a good place to enable/disable clocks needed for hw access.

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 17 ++++++++++++++---
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 19 ++++++++++++++-----
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 20 ++++++++++++++------
drivers/gpu/drm/msm/msm_atomic.c | 2 ++
drivers/gpu/drm/msm/msm_kms.h | 10 ++++++++++
5 files changed, 54 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index efbf8fd343de..d54741f3ad9f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -248,6 +248,18 @@ static void dpu_kms_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
dpu_crtc_vblank(crtc, false);
}

+static void dpu_kms_enable_commit(struct msm_kms *kms)
+{
+ struct dpu_kms *dpu_kms = to_dpu_kms(kms);
+ pm_runtime_get_sync(&dpu_kms->pdev->dev);
+}
+
+static void dpu_kms_disable_commit(struct msm_kms *kms)
+{
+ struct dpu_kms *dpu_kms = to_dpu_kms(kms);
+ pm_runtime_put_sync(&dpu_kms->pdev->dev);
+}
+
static void dpu_kms_prepare_commit(struct msm_kms *kms,
struct drm_atomic_state *state)
{
@@ -267,7 +279,6 @@ static void dpu_kms_prepare_commit(struct msm_kms *kms,
if (!dev || !dev->dev_private)
return;
priv = dev->dev_private;
- pm_runtime_get_sync(&dpu_kms->pdev->dev);

/* Call prepare_commit for all affected encoders */
for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
@@ -335,8 +346,6 @@ static void dpu_kms_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
for_each_crtc_mask(dpu_kms->dev, crtc, crtc_mask)
dpu_crtc_complete_commit(crtc);

- pm_runtime_put_sync(&dpu_kms->pdev->dev);
-
DPU_ATRACE_END("kms_complete_commit");
}

@@ -682,6 +691,8 @@ static const struct msm_kms_funcs kms_funcs = {
.irq_preinstall = dpu_irq_preinstall,
.irq_uninstall = dpu_irq_uninstall,
.irq = dpu_irq,
+ .enable_commit = dpu_kms_enable_commit,
+ .disable_commit = dpu_kms_disable_commit,
.prepare_commit = dpu_kms_prepare_commit,
.flush_commit = dpu_kms_flush_commit,
.commit = dpu_kms_commit,
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
index 78ce2c8a9a38..500e5b08c11f 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
@@ -93,15 +93,24 @@ static int mdp4_hw_init(struct msm_kms *kms)
return ret;
}

-static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
+static void mdp4_enable_commit(struct msm_kms *kms)
+{
+ struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+ mdp4_enable(mdp4_kms);
+}
+
+static void mdp4_disable_commit(struct msm_kms *kms)
{
struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+ mdp4_disable(mdp4_kms);
+}
+
+static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
+{
int i;
struct drm_crtc *crtc;
struct drm_crtc_state *crtc_state;

- mdp4_enable(mdp4_kms);
-
/* see 119ecb7fd */
for_each_new_crtc_in_state(state, crtc, crtc_state, i)
drm_crtc_vblank_get(crtc);
@@ -129,8 +138,6 @@ static void mdp4_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
/* see 119ecb7fd */
for_each_crtc_mask(mdp4_kms->dev, crtc, crtc_mask)
drm_crtc_vblank_put(crtc);
-
- mdp4_disable(mdp4_kms);
}

static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
@@ -182,6 +189,8 @@ static const struct mdp_kms_funcs kms_funcs = {
.irq = mdp4_irq,
.enable_vblank = mdp4_enable_vblank,
.disable_vblank = mdp4_disable_vblank,
+ .enable_commit = mdp4_enable_commit,
+ .disable_commit = mdp4_disable_commit,
.prepare_commit = mdp4_prepare_commit,
.flush_commit = mdp4_flush_commit,
.wait_flush = mdp4_wait_flush,
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index eff1b000258e..ba67bde1dbef 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -140,16 +140,25 @@ static int mdp5_global_obj_init(struct mdp5_kms *mdp5_kms)
return 0;
}

+static void mdp5_enable_commit(struct msm_kms *kms)
+{
+ struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
+ pm_runtime_get_sync(&mdp5_kms->pdev->dev);
+}
+
+static void mdp5_disable_commit(struct msm_kms *kms)
+{
+ struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
+ pm_runtime_put_sync(&mdp5_kms->pdev->dev);
+}
+
static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
- struct device *dev = &mdp5_kms->pdev->dev;
struct mdp5_global_state *global_state;

global_state = mdp5_get_existing_global_state(mdp5_kms);

- pm_runtime_get_sync(dev);
-
if (mdp5_kms->smp)
mdp5_smp_prepare_commit(mdp5_kms->smp, &global_state->smp);
}
@@ -171,15 +180,12 @@ static void mdp5_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
static void mdp5_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
- struct device *dev = &mdp5_kms->pdev->dev;
struct mdp5_global_state *global_state;

global_state = mdp5_get_existing_global_state(mdp5_kms);

if (mdp5_kms->smp)
mdp5_smp_complete_commit(mdp5_kms->smp, &global_state->smp);
-
- pm_runtime_put_sync(dev);
}

static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
@@ -278,6 +284,8 @@ static const struct mdp_kms_funcs kms_funcs = {
.enable_vblank = mdp5_enable_vblank,
.disable_vblank = mdp5_disable_vblank,
.flush_commit = mdp5_flush_commit,
+ .enable_commit = mdp5_enable_commit,
+ .disable_commit = mdp5_disable_commit,
.prepare_commit = mdp5_prepare_commit,
.wait_flush = mdp5_wait_flush,
.complete_commit = mdp5_complete_commit,
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index e3537df848fa..614fb9c5bb58 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -52,6 +52,7 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
struct msm_kms *kms = priv->kms;
unsigned crtc_mask = get_crtc_mask(state);

+ kms->funcs->enable_commit(kms);
kms->funcs->prepare_commit(kms, state);

/*
@@ -72,6 +73,7 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)

kms->funcs->wait_flush(kms, crtc_mask);
kms->funcs->complete_commit(kms, crtc_mask);
+ kms->funcs->disable_commit(kms);

drm_atomic_helper_commit_hw_done(state);

diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index bb70c1758c72..811f5e2c2405 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -35,6 +35,16 @@ struct msm_kms_funcs {
* Atomic commit handling:
*/

+ /**
+ * Enable/disable power/clks needed for hw access done in other
+ * commit related methods.
+ *
+ * If mdp4 is migrated to runpm, we could probably drop these
+ * and use runpm directly.
+ */
+ void (*enable_commit)(struct msm_kms *kms);
+ void (*disable_commit)(struct msm_kms *kms);
+
/**
* Prepare for atomic commit. This is called after any previous
* (async or otherwise) commit has completed.
--
2.21.0