On 14/12/2022 12:05, Vinod Polimera wrote:
Update crtc retrieval from dpu_enc to dpu_enc connector state,
since new links get set as part of the dpu enc virt mode set.
The dpu_enc->crtc cache is no more needed, hence cleaning it as
part of this change.

This patch is dependent on the series:
https://patchwork.freedesktop.org/series/110969/

Signed-off-by: Vinod Polimera <quic_vpoli...@quicinc.com>
---
  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c    |  4 ---
  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 42 +++++++++--------------------
  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h |  8 ------
  3 files changed, 13 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 3f72d38..289d51e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -1029,7 +1029,6 @@ static void dpu_crtc_disable(struct drm_crtc *crtc,
                 */
                if (dpu_encoder_get_intf_mode(encoder) == INTF_MODE_VIDEO)
                        release_bandwidth = true;
-               dpu_encoder_assign_crtc(encoder, NULL);
        }
/* wait for frame_event_done completion */
@@ -1099,9 +1098,6 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
        trace_dpu_crtc_enable(DRMID(crtc), true, dpu_crtc);
        dpu_crtc->enabled = true;
- drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
-               dpu_encoder_assign_crtc(encoder, crtc);
-
        /* Enable/restore vblank irq handling */
        drm_crtc_vblank_on(crtc);
  }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index a585036..b9b254d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -132,11 +132,6 @@ enum dpu_enc_rc_states {
   * @intfs_swapped:    Whether or not the phys_enc interfaces have been swapped
   *                    for partial update right-only cases, such as pingpong
   *                    split where virtual pingpong does not generate IRQs
- * @crtc:              Pointer to the currently assigned crtc. Normally you
- *                     would use crtc->state->encoder_mask to determine the
- *                     link between encoder/crtc. However in this case we need
- *                     to track crtc in the disable() hook which is called
- *                     _after_ encoder_mask is cleared.
   * @connector:                If a mode is set, cached pointer to the active 
connector
   * @crtc_kickoff_cb:          Callback into CRTC that will flush & start
   *                            all CTL paths
@@ -181,7 +176,6 @@ struct dpu_encoder_virt {
bool intfs_swapped; - struct drm_crtc *crtc;
        struct drm_connector *connector;
struct dentry *debugfs_root;
@@ -1317,7 +1311,7 @@ static void dpu_encoder_vblank_callback(struct 
drm_encoder *drm_enc,
                struct dpu_encoder_phys *phy_enc)
  {
        struct dpu_encoder_virt *dpu_enc = NULL;
-       unsigned long lock_flags;
+       struct drm_crtc *crtc;
if (!drm_enc || !phy_enc)
                return;
@@ -1325,12 +1319,13 @@ static void dpu_encoder_vblank_callback(struct 
drm_encoder *drm_enc,
        DPU_ATRACE_BEGIN("encoder_vblank_callback");
        dpu_enc = to_dpu_encoder_virt(drm_enc);
- atomic_inc(&phy_enc->vsync_cnt);
+       if (!dpu_enc->connector || !dpu_enc->connector->state ||
+           !dpu_enc->connector->state->crtc)
+               return;
- spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
-       if (dpu_enc->crtc)
-               dpu_crtc_vblank_callback(dpu_enc->crtc);
-       spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
+       atomic_inc(&phy_enc->vsync_cnt);
+       crtc = dpu_enc->connector->state->crtc;
+       dpu_crtc_vblank_callback(crtc);
DPU_ATRACE_END("encoder_vblank_callback");
  }
@@ -1353,33 +1348,22 @@ static void dpu_encoder_underrun_callback(struct 
drm_encoder *drm_enc,
        DPU_ATRACE_END("encoder_underrun_callback");
  }
-void dpu_encoder_assign_crtc(struct drm_encoder *drm_enc, struct drm_crtc *crtc)
-{
-       struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
-       unsigned long lock_flags;
-
-       spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
-       /* crtc should always be cleared before re-assigning */
-       WARN_ON(crtc && dpu_enc->crtc);
-       dpu_enc->crtc = crtc;
-       spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
-}
-
  void dpu_encoder_toggle_vblank_for_crtc(struct drm_encoder *drm_enc,
                                        struct drm_crtc *crtc, bool enable)
  {
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
-       unsigned long lock_flags;
+       struct drm_crtc *new_crtc;
        int i;
trace_dpu_enc_vblank_cb(DRMID(drm_enc), enable); - spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
-       if (dpu_enc->crtc != crtc) {
-               spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
+       if (!dpu_enc->connector || !dpu_enc->connector->state)
+               return;
+
+       new_crtc = dpu_enc->connector->state->crtc;
+       if (!new_crtc || new_crtc != crtc) {

I don't like going through all the pointers and states without locks. The connector->state can potentially check. So, I'd propose even simpler solution: just store the crtc in the dpu_enc at the creation time. Then you can use the rest of the current dpu_enc->crtc as expected.

                return;
        }
-       spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
for (i = 0; i < dpu_enc->num_phys_encs; i++) {
                struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index 7f3d823..eb9fc7c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -40,14 +40,6 @@ struct msm_display_info {
  };
/**
- * dpu_encoder_assign_crtc - Link the encoder to the crtc it's assigned to
- * @encoder:   encoder pointer
- * @crtc:      crtc pointer
- */
-void dpu_encoder_assign_crtc(struct drm_encoder *encoder,
-                            struct drm_crtc *crtc);
-
-/**
   * dpu_encoder_toggle_vblank_for_crtc - Toggles vblank interrupts on or off if
   *    the encoder is assigned to the given crtc
   * @encoder:  encoder pointer

--
With best wishes
Dmitry

Reply via email to