On 05/07/2022 20:00, Vinod Polimera wrote:
Enable PSR on eDP interface using drm self-refresh librabry.
This patch uses a trigger from self-refresh library to enter/exit
into PSR, when there are no updates from framework.
Signed-off-by: Kalyan Thota <quic_kalyant@xxxxxxxxxxx>
Signed-off-by: Vinod Polimera <quic_vpolimer@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 13 ++++++++++++-
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 19 ++++++++++++++++++-
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 +-
3 files changed, 31 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index f91e3d1..e63e363 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -18,6 +18,7 @@
#include <drm/drm_probe_helper.h>
#include <drm/drm_rect.h>
#include <drm/drm_vblank.h>
+#include <drm/drm_self_refresh_helper.h>
#include "dpu_kms.h"
#include "dpu_hw_lm.h"
@@ -961,6 +962,9 @@ static void dpu_crtc_disable(struct drm_crtc *crtc,
DRM_DEBUG_KMS("crtc%d\n", crtc->base.id);
+ if (old_crtc_state->self_refresh_active)
+ return;
+
/* Disable/save vblank irq handling */
drm_crtc_vblank_off(crtc);
@@ -1019,7 +1023,9 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
struct drm_encoder *encoder;
bool request_bandwidth = false;
+ struct drm_crtc_state *old_crtc_state;
+ old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
What for?
pm_runtime_get_sync(crtc->dev->dev);
DRM_DEBUG_KMS("crtc%d\n", crtc->base.id);
@@ -1521,7 +1527,7 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
{
struct drm_crtc *crtc = NULL;
struct dpu_crtc *dpu_crtc = NULL;
- int i;
+ int i, ret;
dpu_crtc = kzalloc(sizeof(*dpu_crtc), GFP_KERNEL);
if (!dpu_crtc)
@@ -1558,6 +1564,11 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
/* initialize event handling */
spin_lock_init(&dpu_crtc->event_lock);
+ ret = drm_self_refresh_helper_init(crtc);
+ if (ret)
+ DPU_ERROR("Failed to initialize %s with self-refresh helpers %d\n",
+ crtc->name, ret);
Return an error?
+
DRM_DEBUG_KMS("%s: successfully initialized crtc\n", dpu_crtc->name);
return crtc;
}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index f01a976..e2a74ba 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -225,6 +225,11 @@ bool dpu_encoder_is_widebus_enabled(const struct drm_encoder *drm_enc)
return dpu_enc->wide_bus_en;
}
+static inline bool is_self_refresh_active(const struct drm_crtc_state *state)
+{
+ return (state && state->self_refresh_active);
+}
Please inline this function. There is just one user.
+
static void _dpu_encoder_setup_dither(struct dpu_hw_pingpong *hw_pp, unsigned bpc)
{
struct dpu_hw_dither_cfg dither_cfg = { 0 };
@@ -592,7 +597,7 @@ static int dpu_encoder_virt_atomic_check(
if (drm_atomic_crtc_needs_modeset(crtc_state)) {
dpu_rm_release(global_state, drm_enc);
- if (!crtc_state->active_changed || crtc_state->active)
+ if (!crtc_state->active_changed || crtc_state->enable)
This warrants a separate commit with Fixes tag.
ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
drm_enc, crtc_state, topology);
}
@@ -1171,11 +1176,23 @@ static void dpu_encoder_virt_atomic_disable(struct drm_encoder *drm_enc,
struct drm_atomic_state *state)
{
struct dpu_encoder_virt *dpu_enc = NULL;
+ struct drm_crtc *crtc;
+ struct drm_crtc_state *old_state;
int i = 0;
dpu_enc = to_dpu_encoder_virt(drm_enc);
DPU_DEBUG_ENC(dpu_enc, "\n");
+ crtc = drm_enc->crtc;
+ old_state = drm_atomic_get_old_crtc_state(state, crtc);
+
+ /*
+ * The encoder disabled already occurred when self refresh mode
The encoder is already disabled if self ...
+ * was set earlier, in the old_state for the corresponding crtc.
+ */
+ if (is_self_refresh_active(old_state))
+ return;
+
mutex_lock(&dpu_enc->enc_lock);
dpu_enc->enabled = false;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index bce4764..cc0a674 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -507,7 +507,7 @@ static void dpu_kms_wait_for_commit_done(struct msm_kms *kms,
return;
}
- if (!crtc->state->active) {
+ if (!drm_atomic_crtc_effectively_active(crtc->state)) {
DPU_DEBUG("[crtc:%d] not active\n", crtc->base.id);
return;
}
--
With best wishes
Dmitry
