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Subject[PATCH 04/10] drm/msm: add kms->wait_flush()
Date
From: Rob Clark <robdclark@chromium.org>

First step in re-working the atomic related internal API to prepare for
async updates pending.. ->wait_flush() is intended to block until there
is no in-progress flush.

A crtc_mask is used, rather than an atomic state object, as this will
later be used for async flush after the atomic state is destroyed.

This replaces ->wait_for_crtc_commit_done()

v2: update for review comments

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 11 ++++++-
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 17 ++++++----
drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c | 17 ++++++----
drivers/gpu/drm/msm/msm_atomic.c | 42 ++++++++++--------------
drivers/gpu/drm/msm/msm_kms.h | 9 +++--
5 files changed, 54 insertions(+), 42 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 31454cc5d8c5..df421b986bc3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -388,6 +388,15 @@ static void dpu_kms_wait_for_commit_done(struct msm_kms *kms,
}
}

+static void dpu_kms_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
+{
+ struct dpu_kms *dpu_kms = to_dpu_kms(kms);
+ struct drm_crtc *crtc;
+
+ for_each_crtc_mask(dpu_kms->dev, crtc, crtc_mask)
+ dpu_kms_wait_for_commit_done(kms, crtc);
+}
+
static int _dpu_kms_initialize_dsi(struct drm_device *dev,
struct msm_drm_private *priv,
struct dpu_kms *dpu_kms)
@@ -682,8 +691,8 @@ static const struct msm_kms_funcs kms_funcs = {
.irq = dpu_irq,
.prepare_commit = dpu_kms_prepare_commit,
.commit = dpu_kms_commit,
+ .wait_flush = dpu_kms_wait_flush,
.complete_commit = dpu_kms_complete_commit,
- .wait_for_crtc_commit_done = dpu_kms_wait_for_commit_done,
.enable_vblank = dpu_kms_enable_vblank,
.disable_vblank = dpu_kms_disable_vblank,
.check_modified_format = dpu_format_check_modified_format,
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
index 7a9ab55b4608..32dcb1d7860c 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
@@ -107,6 +107,15 @@ static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *st
drm_crtc_vblank_get(crtc);
}

+static void mdp4_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
+{
+ struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
+ struct drm_crtc *crtc;
+
+ for_each_crtc_mask(mdp4_kms->dev, crtc, crtc_mask)
+ mdp4_crtc_wait_for_commit_done(crtc);
+}
+
static void mdp4_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state)
{
struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
@@ -123,12 +132,6 @@ static void mdp4_complete_commit(struct msm_kms *kms, struct drm_atomic_state *s
mdp4_disable(mdp4_kms);
}

-static void mdp4_wait_for_crtc_commit_done(struct msm_kms *kms,
- struct drm_crtc *crtc)
-{
- mdp4_crtc_wait_for_commit_done(crtc);
-}
-
static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
struct drm_encoder *encoder)
{
@@ -179,8 +182,8 @@ static const struct mdp_kms_funcs kms_funcs = {
.enable_vblank = mdp4_enable_vblank,
.disable_vblank = mdp4_disable_vblank,
.prepare_commit = mdp4_prepare_commit,
+ .wait_flush = mdp4_wait_flush,
.complete_commit = mdp4_complete_commit,
- .wait_for_crtc_commit_done = mdp4_wait_for_crtc_commit_done,
.get_format = mdp_get_format,
.round_pixclk = mdp4_round_pixclk,
.destroy = mdp4_destroy,
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 8bf5f3264dc9..440e000c8c3d 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -154,6 +154,15 @@ static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *st
mdp5_smp_prepare_commit(mdp5_kms->smp, &global_state->smp);
}

+static void mdp5_wait_flush(struct msm_kms *kms, unsigned crtc_mask)
+{
+ struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
+ struct drm_crtc *crtc;
+
+ for_each_crtc_mask(mdp5_kms->dev, crtc, crtc_mask)
+ mdp5_crtc_wait_for_commit_done(crtc);
+}
+
static void mdp5_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
@@ -170,12 +179,6 @@ static void mdp5_complete_commit(struct msm_kms *kms, struct drm_atomic_state *s
pm_runtime_put_sync(dev);
}

-static void mdp5_wait_for_crtc_commit_done(struct msm_kms *kms,
- struct drm_crtc *crtc)
-{
- mdp5_crtc_wait_for_commit_done(crtc);
-}
-
static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
struct drm_encoder *encoder)
{
@@ -272,8 +275,8 @@ static const struct mdp_kms_funcs kms_funcs = {
.enable_vblank = mdp5_enable_vblank,
.disable_vblank = mdp5_disable_vblank,
.prepare_commit = mdp5_prepare_commit,
+ .wait_flush = mdp5_wait_flush,
.complete_commit = mdp5_complete_commit,
- .wait_for_crtc_commit_done = mdp5_wait_for_crtc_commit_done,
.get_format = mdp_get_format,
.round_pixclk = mdp5_round_pixclk,
.set_split_display = mdp5_set_split_display,
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index e5aae1645933..4ca4b654c221 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -10,28 +10,6 @@
#include "msm_gem.h"
#include "msm_kms.h"

-static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
- struct drm_atomic_state *old_state)
-{
- struct drm_crtc *crtc;
- struct drm_crtc_state *new_crtc_state;
- struct msm_drm_private *priv = old_state->dev->dev_private;
- struct msm_kms *kms = priv->kms;
- int i;
-
- for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
- if (!new_crtc_state->active)
- continue;
-
- if (drm_crtc_vblank_get(crtc))
- continue;
-
- kms->funcs->wait_for_crtc_commit_done(kms, crtc);
-
- drm_crtc_vblank_put(crtc);
- }
-}
-
int msm_atomic_prepare_fb(struct drm_plane *plane,
struct drm_plane_state *new_state)
{
@@ -51,11 +29,28 @@ int msm_atomic_prepare_fb(struct drm_plane *plane,
return msm_framebuffer_prepare(new_state->fb, kms->aspace);
}

+/* Get bitmask of crtcs that will need to be flushed. The bitmask
+ * can be used with for_each_crtc_mask() iterator, to iterate
+ * effected crtcs without needing to preserve the atomic state.
+ */
+static unsigned get_crtc_mask(struct drm_atomic_state *state)
+{
+ struct drm_crtc_state *crtc_state;
+ struct drm_crtc *crtc;
+ unsigned i, mask = 0;
+
+ for_each_new_crtc_in_state(state, crtc, crtc_state, i)
+ mask |= drm_crtc_mask(crtc);
+
+ return mask;
+}
+
void msm_atomic_commit_tail(struct drm_atomic_state *state)
{
struct drm_device *dev = state->dev;
struct msm_drm_private *priv = dev->dev_private;
struct msm_kms *kms = priv->kms;
+ unsigned crtc_mask = get_crtc_mask(state);

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

@@ -70,8 +65,7 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
kms->funcs->commit(kms, state);
}

- msm_atomic_wait_for_commit_done(dev, state);
-
+ kms->funcs->wait_flush(kms, crtc_mask);
kms->funcs->complete_commit(kms, state);

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 c7588a42635e..a112dfb36301 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -34,9 +34,8 @@ struct msm_kms_funcs {
void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
void (*commit)(struct msm_kms *kms, struct drm_atomic_state *state);
void (*complete_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
- /* functions to wait for atomic commit completed on each CRTC */
- void (*wait_for_crtc_commit_done)(struct msm_kms *kms,
- struct drm_crtc *crtc);
+ void (*wait_flush)(struct msm_kms *kms, unsigned crtc_mask);
+
/* get msm_format w/ optional format modifiers from drm_mode_fb_cmd2 */
const struct msm_format *(*get_format)(struct msm_kms *kms,
const uint32_t format,
@@ -98,4 +97,8 @@ struct msm_mdss {
int mdp5_mdss_init(struct drm_device *dev);
int dpu_mdss_init(struct drm_device *dev);

+#define for_each_crtc_mask(dev, crtc, crtc_mask) \
+ drm_for_each_crtc(crtc, dev) \
+ for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
+
#endif /* __MSM_KMS_H__ */
--
2.21.0
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