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Fri, 24 Jan 2025 03:14:35 -0800 (PST) From: Dmitry Baryshkov Date: Fri, 24 Jan 2025 13:14:21 +0200 Subject: [PATCH 3/6] drm/msm/dpu: stop upgrading commits by enabling allow_modeset Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250124-atomic-needs-modeset-v1-3-b0c05c9eda0f@linaro.org> References: <20250124-atomic-needs-modeset-v1-0-b0c05c9eda0f@linaro.org> In-Reply-To: <20250124-atomic-needs-modeset-v1-0-b0c05c9eda0f@linaro.org> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dave Airlie , Jocelyn Falempe , Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , Kalyan Thota Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, 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=2696; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=nTNh12sSi+bFS767UAWn/EcHJvQRJYETlDdgdnAZ+xY=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnk3YVkHVEQzO2H42gTfxsWoNpxy0mROcV3oEz4 AyfFaZyJYWJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ5N2FQAKCRCLPIo+Aiko 1boSB/9Fjf0rWskLkp1CRYYrfV8Hxc3Cp6gZ4ThZcniTvGGLG+/0McgLdqyk+A11cU2jzsLNM4g +V2aI4HtslMp1QD6fmTapUdo998Shgg1k7IDk7lObsiKVwfP9CQln2bLNyPqcpo4AQEBdk4vKIT +KPBXsjDxBOCrTTfaI9JHj3JX8J35I+7K+U4bA5DBcCdhc5zIExDoAxr7RnL8yin2eWp0JkMiTY 4kaQLwdPGFFr2tuzRbiV8wUm2x2kT/Oj8qSFKezc8VLG5XLzIM3AXGX1Qrg70eHCTL50IlzF6gx sGbZtPmwyIMNkDV2Jck3IckCAc6KtpDzcDv/6Uj0iyBx1UgW X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A As pointed out by the commit c5e3306a424b ("drm/atomic: clarify the rules around drm_atomic_state->allow_modeset"), the drivers are now allowed to set the drm_atomic_state.allow_modeset flag, as it might break userspace API. Stop upgrading the commit to full modeset. Instead set the drm_crtc_state.mode_changed if modeset is allowed and if CTM has been enabled or disabled AND check that DSPPs are assigned to the CRTC if CTM is enabled. NOTE: This change has userspace impact, as now non-modeset commits which enable CTM will fail. Fixes: 82836692d5d7 ("drm/msm/dpu: manage DPU resources if CTM is requested") Reported-by: Simona Vetter Closes: https://lore.kernel.org/r/20231010170746.617366-1-daniel.vetter@ffwll.ch/ Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 9 +++++++++ drivers/gpu/drm/msm/msm_atomic.c | 10 ++-------- 2 files changed, 11 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index a24fedb5ba4f1c84777b71c669bac0241acdd421..84313bc1f9888452914612fab559b390cf38c705 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -828,6 +828,15 @@ static int dpu_encoder_virt_atomic_check( global_state, crtc_state); } + if (crtc_state->ctm) { + struct dpu_crtc_state *cstate = to_dpu_crtc_state(crtc_state); + int i; + + for (i = 0; i < cstate->num_mixers; i++) + if (!cstate->mixers[i].hw_dspp) + return -EINVAL; + } + trace_dpu_enc_atomic_check_flags(DRMID(drm_enc), adj_mode->flags); return ret; diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 5c8c0661cfcd85445950e0f273b8879e7f077727..fdbe49edf2e1506ebeab500e782d456d77ba4fcf 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -189,17 +189,11 @@ int msm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state) struct drm_crtc *crtc; 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) || - (!old_crtc_state->ctm && new_crtc_state->ctm)) { + if ((!!old_crtc_state->ctm != !!new_crtc_state->ctm) && + state->allow_modeset) new_crtc_state->mode_changed = true; - state->allow_modeset = true; - } } if (kms && kms->funcs && kms->funcs->check_mode_changed)