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SubjectRe: [PATCH v5 01/10] drm/msm/disp/dpu1: clear dpu_assign_crtc and get crtc from connector state instead of dpu_enc
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On 11/07/2022 12:47, 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.
>
> Signed-off-by: Vinod Polimera <quic_vpolimer@quicinc.com>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 4 ----
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 29 ++++++++++++++---------------
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 8 --------
> 3 files changed, 14 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> index b56f777..f91e3d1 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> @@ -972,7 +972,6 @@ 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 */
> @@ -1042,9 +1041,6 @@ 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 52516eb..8fb3e15 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -1245,6 +1245,7 @@ static void dpu_encoder_vblank_callback(struct drm_encoder *drm_enc,
> struct dpu_encoder_phys *phy_enc)
> {
> struct dpu_encoder_virt *dpu_enc = NULL;
> + struct drm_crtc *crtc;
> unsigned long lock_flags;
>
> if (!drm_enc || !phy_enc)
> @@ -1253,9 +1254,14 @@ 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);
>
> + if (!dpu_enc->connector || !dpu_enc->connector->state)
> + return;
> +
> + crtc = dpu_enc->connector->state->crtc;
> +
> spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
> - if (dpu_enc->crtc)
> - dpu_crtc_vblank_callback(dpu_enc->crtc);
> + if (crtc)
> + dpu_crtc_vblank_callback(crtc);
> spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
>
> atomic_inc(&phy_enc->vsync_cnt);
> @@ -1280,29 +1286,22 @@ 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);
> -}

Please also remove the dpu_encoder_virt::crtc pointer.

> -
> 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);
> + struct drm_crtc *new_crtc;
> unsigned long lock_flags;
> int i;
>
> trace_dpu_enc_vblank_cb(DRMID(drm_enc), enable);
>
> + if (!dpu_enc->connector || !dpu_enc->connector->state)
> + return;
> +
> + new_crtc = dpu_enc->connector->state->crtc;
> spin_lock_irqsave(&dpu_enc->enc_spinlock, lock_flags);
> - if (dpu_enc->crtc != crtc) {
> + if (!new_crtc || crtc != crtc) {

Second condition is always false.

> spin_unlock_irqrestore(&dpu_enc->enc_spinlock, lock_flags);
> return;
> }
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> index 781d41c..edba815 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> @@ -39,14 +39,6 @@ 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

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