6.10-stable review patch. If anyone has any objections, please let me know.
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From: Dmitry Baryshkov dmitry.baryshkov@linaro.org
[ Upstream commit 35322c39a653c775670f0713fb96ccc2cd91a747 ]
In the DPU driver blank IRQ handling is called from a vblank worker and can happen outside of the irq_enable / irq_disable pair. Using the worker makes that completely asynchronous with the rest of the code. Revert commit d13f638c9b88 ("drm/msm/dpu: drop dpu_encoder_phys_ops.atomic_mode_set") to fix vblank IRQ assignment for CMD DSI panels.
Call trace: dpu_encoder_phys_cmd_control_vblank_irq+0x218/0x294 dpu_encoder_toggle_vblank_for_crtc+0x160/0x194 dpu_crtc_vblank+0xbc/0x228 dpu_kms_enable_vblank+0x18/0x24 vblank_ctrl_worker+0x34/0x6c process_one_work+0x218/0x620 worker_thread+0x1ac/0x37c kthread+0x114/0x118 ret_from_fork+0x10/0x20
Fixes: d13f638c9b88 ("drm/msm/dpu: drop dpu_encoder_phys_ops.atomic_mode_set") Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Reviewed-by: Abhinav Kumar quic_abhinavk@quicinc.com Patchwork: https://patchwork.freedesktop.org/patch/595065/ Link: https://lore.kernel.org/r/20240522-dpu-revert-ams-v2-1-b37825d708e1@linaro.o... Signed-off-by: Abhinav Kumar quic_abhinavk@quicinc.com Signed-off-by: Rob Clark robdclark@chromium.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 2 ++ .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 5 +++ .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 32 +++++++++++-------- .../drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 13 ++++++-- .../drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 11 ++++++- 5 files changed, 46 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index cf7d769ab3b95..708657598cce4 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -1200,6 +1200,8 @@ static void dpu_encoder_virt_atomic_mode_set(struct drm_encoder *drm_enc, phys->hw_ctl = to_dpu_hw_ctl(hw_ctl[i]);
phys->cached_mode = crtc_state->adjusted_mode; + if (phys->ops.atomic_mode_set) + phys->ops.atomic_mode_set(phys, crtc_state, conn_state); } }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h index 002e89cc17058..30470cd15a484 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h @@ -69,6 +69,8 @@ struct dpu_encoder_phys; * @is_master: Whether this phys_enc is the current master * encoder. Can be switched at enable time. Based * on split_role and current mode (CMD/VID). + * @atomic_mode_set: DRM Call. Set a DRM mode. + * This likely caches the mode, for use at enable. * @enable: DRM Call. Enable a DRM mode. * @disable: DRM Call. Disable mode. * @control_vblank_irq Register/Deregister for VBLANK IRQ @@ -93,6 +95,9 @@ struct dpu_encoder_phys; struct dpu_encoder_phys_ops { void (*prepare_commit)(struct dpu_encoder_phys *encoder); bool (*is_master)(struct dpu_encoder_phys *encoder); + void (*atomic_mode_set)(struct dpu_encoder_phys *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state); void (*enable)(struct dpu_encoder_phys *encoder); void (*disable)(struct dpu_encoder_phys *encoder); int (*control_vblank_irq)(struct dpu_encoder_phys *enc, bool enable); diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c index 489be1c0c7046..95cd39b496688 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c @@ -142,6 +142,23 @@ static void dpu_encoder_phys_cmd_underrun_irq(void *arg) dpu_encoder_underrun_callback(phys_enc->parent, phys_enc); }
+static void dpu_encoder_phys_cmd_atomic_mode_set( + struct dpu_encoder_phys *phys_enc, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + phys_enc->irq[INTR_IDX_CTL_START] = phys_enc->hw_ctl->caps->intr_start; + + phys_enc->irq[INTR_IDX_PINGPONG] = phys_enc->hw_pp->caps->intr_done; + + if (phys_enc->has_intf_te) + phys_enc->irq[INTR_IDX_RDPTR] = phys_enc->hw_intf->cap->intr_tear_rd_ptr; + else + phys_enc->irq[INTR_IDX_RDPTR] = phys_enc->hw_pp->caps->intr_rdptr; + + phys_enc->irq[INTR_IDX_UNDERRUN] = phys_enc->hw_intf->cap->intr_underrun; +} + static int _dpu_encoder_phys_cmd_handle_ppdone_timeout( struct dpu_encoder_phys *phys_enc) { @@ -280,14 +297,6 @@ static void dpu_encoder_phys_cmd_irq_enable(struct dpu_encoder_phys *phys_enc) phys_enc->hw_pp->idx - PINGPONG_0, phys_enc->vblank_refcount);
- phys_enc->irq[INTR_IDX_CTL_START] = phys_enc->hw_ctl->caps->intr_start; - phys_enc->irq[INTR_IDX_PINGPONG] = phys_enc->hw_pp->caps->intr_done; - - if (phys_enc->has_intf_te) - phys_enc->irq[INTR_IDX_RDPTR] = phys_enc->hw_intf->cap->intr_tear_rd_ptr; - else - phys_enc->irq[INTR_IDX_RDPTR] = phys_enc->hw_pp->caps->intr_rdptr; - dpu_core_irq_register_callback(phys_enc->dpu_kms, phys_enc->irq[INTR_IDX_PINGPONG], dpu_encoder_phys_cmd_pp_tx_done_irq, @@ -318,10 +327,6 @@ static void dpu_encoder_phys_cmd_irq_disable(struct dpu_encoder_phys *phys_enc) dpu_core_irq_unregister_callback(phys_enc->dpu_kms, phys_enc->irq[INTR_IDX_UNDERRUN]); dpu_encoder_phys_cmd_control_vblank_irq(phys_enc, false); dpu_core_irq_unregister_callback(phys_enc->dpu_kms, phys_enc->irq[INTR_IDX_PINGPONG]); - - phys_enc->irq[INTR_IDX_CTL_START] = 0; - phys_enc->irq[INTR_IDX_PINGPONG] = 0; - phys_enc->irq[INTR_IDX_RDPTR] = 0; }
static void dpu_encoder_phys_cmd_tearcheck_config( @@ -698,6 +703,7 @@ static void dpu_encoder_phys_cmd_init_ops( struct dpu_encoder_phys_ops *ops) { ops->is_master = dpu_encoder_phys_cmd_is_master; + ops->atomic_mode_set = dpu_encoder_phys_cmd_atomic_mode_set; ops->enable = dpu_encoder_phys_cmd_enable; ops->disable = dpu_encoder_phys_cmd_disable; ops->control_vblank_irq = dpu_encoder_phys_cmd_control_vblank_irq; @@ -736,8 +742,6 @@ struct dpu_encoder_phys *dpu_encoder_phys_cmd_init(struct drm_device *dev,
dpu_encoder_phys_cmd_init_ops(&phys_enc->ops); phys_enc->intf_mode = INTF_MODE_CMD; - phys_enc->irq[INTR_IDX_UNDERRUN] = phys_enc->hw_intf->cap->intr_underrun; - cmd_enc->stream_sel = 0;
if (!phys_enc->hw_intf) { diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c index ef69c2f408c3e..636a97432d517 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c @@ -356,6 +356,16 @@ static bool dpu_encoder_phys_vid_needs_single_flush( return phys_enc->split_role != ENC_ROLE_SOLO; }
+static void dpu_encoder_phys_vid_atomic_mode_set( + struct dpu_encoder_phys *phys_enc, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + phys_enc->irq[INTR_IDX_VSYNC] = phys_enc->hw_intf->cap->intr_vsync; + + phys_enc->irq[INTR_IDX_UNDERRUN] = phys_enc->hw_intf->cap->intr_underrun; +} + static int dpu_encoder_phys_vid_control_vblank_irq( struct dpu_encoder_phys *phys_enc, bool enable) @@ -699,6 +709,7 @@ static int dpu_encoder_phys_vid_get_frame_count( static void dpu_encoder_phys_vid_init_ops(struct dpu_encoder_phys_ops *ops) { ops->is_master = dpu_encoder_phys_vid_is_master; + ops->atomic_mode_set = dpu_encoder_phys_vid_atomic_mode_set; ops->enable = dpu_encoder_phys_vid_enable; ops->disable = dpu_encoder_phys_vid_disable; ops->control_vblank_irq = dpu_encoder_phys_vid_control_vblank_irq; @@ -737,8 +748,6 @@ struct dpu_encoder_phys *dpu_encoder_phys_vid_init(struct drm_device *dev,
dpu_encoder_phys_vid_init_ops(&phys_enc->ops); phys_enc->intf_mode = INTF_MODE_VIDEO; - phys_enc->irq[INTR_IDX_VSYNC] = phys_enc->hw_intf->cap->intr_vsync; - phys_enc->irq[INTR_IDX_UNDERRUN] = phys_enc->hw_intf->cap->intr_underrun;
DPU_DEBUG_VIDENC(phys_enc, "created intf idx:%d\n", p->hw_intf->idx);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c index d3ea91c1d7d2e..356dca5e5ea94 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c @@ -404,6 +404,15 @@ static void dpu_encoder_phys_wb_irq_disable(struct dpu_encoder_phys *phys) dpu_core_irq_unregister_callback(phys->dpu_kms, phys->irq[INTR_IDX_WB_DONE]); }
+static void dpu_encoder_phys_wb_atomic_mode_set( + struct dpu_encoder_phys *phys_enc, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + + phys_enc->irq[INTR_IDX_WB_DONE] = phys_enc->hw_wb->caps->intr_wb_done; +} + static void _dpu_encoder_phys_wb_handle_wbdone_timeout( struct dpu_encoder_phys *phys_enc) { @@ -640,6 +649,7 @@ static bool dpu_encoder_phys_wb_is_valid_for_commit(struct dpu_encoder_phys *phy static void dpu_encoder_phys_wb_init_ops(struct dpu_encoder_phys_ops *ops) { ops->is_master = dpu_encoder_phys_wb_is_master; + ops->atomic_mode_set = dpu_encoder_phys_wb_atomic_mode_set; ops->enable = dpu_encoder_phys_wb_enable; ops->disable = dpu_encoder_phys_wb_disable; ops->wait_for_commit_done = dpu_encoder_phys_wb_wait_for_commit_done; @@ -685,7 +695,6 @@ struct dpu_encoder_phys *dpu_encoder_phys_wb_init(struct drm_device *dev,
dpu_encoder_phys_wb_init_ops(&phys_enc->ops); phys_enc->intf_mode = INTF_MODE_WB_LINE; - phys_enc->irq[INTR_IDX_WB_DONE] = phys_enc->hw_wb->caps->intr_wb_done;
atomic_set(&wb_enc->wbirq_refcount, 0);