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Sat, 21 Dec 2024 21:00:59 -0800 (PST) From: Dmitry Baryshkov Date: Sun, 22 Dec 2024 07:00:46 +0200 Subject: [PATCH 6/6] drm/msm/dpu: don't set crtc_state->mode_changed from atomic_check() Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241222-drm-dirty-modeset-v1-6-0e76a53eceb9@linaro.org> References: <20241222-drm-dirty-modeset-v1-0-0e76a53eceb9@linaro.org> In-Reply-To: <20241222-drm-dirty-modeset-v1-0-0e76a53eceb9@linaro.org> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , Chandan Uddaraju , Jeykumar Sankaran , Jordan Crouse , Sravanthi Kollukuduru Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Archit Taneja , Rajesh Yadav , linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, Simona Vetter X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=7162; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=DYgtDJQPVbedGxDbDp9oOhz2z6FzJGN9bVgSpfs5T1A=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnZ5z8q5ZLE91hpI9bKURtnooCKOkRd5GgQ1zBl zIpLTUQ90aJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ2ec/AAKCRCLPIo+Aiko 1YdFB/9Tz+IdZGx7nLZX9BeA60xx2fLspau9frJKY4ko3gNUUbQU/cwT136wnAD1ttr9w1J2Qr5 JjbKLIeY7wZMujTDAZEGbftU/AxzoO4wv/RLT19oZjTUfaHEY6CputmywtH75xjAh2J1GozOxwL cczIqw7M/abx+wncedvtjA9yao+zXq46ZJaIui07sbmn17EQ4oMx7DUuAuMweOq9auMCMhTY2Gl A6zs1jORwpjWrBJOoGRsXwSkLNBFgad2oUtwqdoWOecRlT7XIoT12p16dRxwS3YfoJHRixmFMkN 6PNecUwIQSZ3xPz51fnT7xA4C2oi6yq3ve+Eelxerl7s2QCk X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A The MSM driver uses drm_atomic_helper_check() which mandates that none of the atomic_check() callbacks toggles crtc_state->mode_changed. Perform corresponding check before calling the drm_atomic_helper_check() function. Fixes: 8b45a26f2ba9 ("drm/msm/dpu: reserve cdm blocks for writeback in case of YUV output") Reported-by: Simona Vetter Closes: https://lore.kernel.org/dri-devel/ZtW_S0j5AEr4g0QW@phenom.ffwll.local/ Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 32 +++++++++++++++++++++++++---- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 4 ++++ drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 26 +++++++++++++++++++++++ drivers/gpu/drm/msm/msm_atomic.c | 13 +++++++++++- drivers/gpu/drm/msm/msm_kms.h | 7 +++++++ 5 files changed, 77 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 209e6fb605b2d8724935b62001032e7d39540366..b7c3aa8d0e2ca58091deacdeaccb0819d2bf045c 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -753,6 +753,34 @@ static void dpu_encoder_assign_crtc_resources(struct dpu_kms *dpu_kms, cstate->num_mixers = num_lm; } +/** + * dpu_encoder_virt_check_mode_changed: check if full modeset is required + * @drm_enc: Pointer to drm encoder structure + * @crtc_state: Corresponding CRTC state to be checked + * @conn_state: Corresponding Connector's state to be checked + * + * Check if the changes in the object properties demand full mode set. + */ +int dpu_encoder_virt_check_mode_changed(struct drm_encoder *drm_enc, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc); + struct msm_display_topology topology; + + DPU_DEBUG_ENC(dpu_enc, "\n"); + + /* Using mode instead of adjusted_mode as it wasn't computed yet */ + topology = dpu_encoder_get_topology(dpu_enc, &crtc_state->mode, crtc_state, conn_state); + + if (topology.needs_cdm && !dpu_enc->cur_master->hw_cdm) + crtc_state->mode_changed = true; + else if (!topology.needs_cdm && dpu_enc->cur_master->hw_cdm) + crtc_state->mode_changed = true; + + return 0; +} + static int dpu_encoder_virt_atomic_check( struct drm_encoder *drm_enc, struct drm_crtc_state *crtc_state, @@ -786,10 +814,6 @@ static int dpu_encoder_virt_atomic_check( topology = dpu_encoder_get_topology(dpu_enc, adj_mode, crtc_state, conn_state); - if (topology.needs_cdm && !dpu_enc->cur_master->hw_cdm) - crtc_state->mode_changed = true; - else if (!topology.needs_cdm && dpu_enc->cur_master->hw_cdm) - crtc_state->mode_changed = true; /* * Release and Allocate resources on every modeset */ diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h index 92b5ee390788d16e85e195a664417896a2bf1cae..da133ee4701a329f566f6f9a7255f2f6d050f891 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h @@ -88,4 +88,8 @@ void dpu_encoder_cleanup_wb_job(struct drm_encoder *drm_enc, bool dpu_encoder_is_valid_for_commit(struct drm_encoder *drm_enc); +int dpu_encoder_virt_check_mode_changed(struct drm_encoder *drm_enc, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state); + #endif /* __DPU_ENCODER_H__ */ diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index dae8a94d3366abfb8937d5f44d8968f1d0691c2d..e2d822f7d785dc0debcb28595029a3e2050b0cf4 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -446,6 +446,31 @@ static void dpu_kms_disable_commit(struct msm_kms *kms) pm_runtime_put_sync(&dpu_kms->pdev->dev); } +static int dpu_kms_check_mode_changed(struct msm_kms *kms, struct drm_atomic_state *state) +{ + struct drm_crtc_state *new_crtc_state; + struct drm_connector *connector; + struct drm_connector_state *new_conn_state; + int i; + + for_each_new_connector_in_state(state, connector, new_conn_state, i) { + struct drm_encoder *encoder; + + WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc); + + if (!new_conn_state->crtc || !new_conn_state->best_encoder) + continue; + + new_crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); + + encoder = new_conn_state->best_encoder; + + dpu_encoder_virt_check_mode_changed(encoder, new_crtc_state, new_conn_state); + } + + return 0; +} + static void dpu_kms_flush_commit(struct msm_kms *kms, unsigned crtc_mask) { struct dpu_kms *dpu_kms = to_dpu_kms(kms); @@ -1049,6 +1074,7 @@ static const struct msm_kms_funcs kms_funcs = { .irq = dpu_core_irq, .enable_commit = dpu_kms_enable_commit, .disable_commit = dpu_kms_disable_commit, + .check_mode_changed = dpu_kms_check_mode_changed, .flush_commit = dpu_kms_flush_commit, .wait_flush = dpu_kms_wait_flush, .complete_commit = dpu_kms_complete_commit, diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index a7a2384044ffdb13579cc9a10f56f8de9beca761..364df245e3a209094782ca1b47b752a729b32a5b 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -183,10 +183,16 @@ static unsigned get_crtc_mask(struct drm_atomic_state *state) int msm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state) { + struct msm_drm_private *priv = dev->dev_private; + struct msm_kms *kms = priv->kms; struct drm_crtc_state *old_crtc_state, *new_crtc_state; struct drm_crtc *crtc; - int i; + int i, ret = 0; + /* + * FIXME: stop setting allow_modeset and move this check to the DPU + * driver. + */ for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { if ((old_crtc_state->ctm && !new_crtc_state->ctm) || @@ -196,6 +202,11 @@ int msm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state) } } + if (kms && kms->funcs && kms->funcs->check_mode_changed) + ret = kms->funcs->check_mode_changed(kms, state); + if (ret) + return ret; + return drm_atomic_helper_check(dev, state); } diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index e60162744c669773b6e5aef824a173647626ab4e..ec2a75af89b09754faef1a07adc9338f7d78161e 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -59,6 +59,13 @@ struct msm_kms_funcs { void (*enable_commit)(struct msm_kms *kms); void (*disable_commit)(struct msm_kms *kms); + /** + * @check_mode_changed: + * + * Verify if the commit requires a full modeset on one of CRTCs. + */ + int (*check_mode_changed)(struct msm_kms *kms, struct drm_atomic_state *state); + /** * Prepare for atomic commit. This is called after any previous * (async or otherwise) commit has completed.