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[129.46.232.65]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ac84cb135fsm19223386d6.38.2026.04.10.02.36.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Apr 2026 02:36:47 -0700 (PDT) From: Yongxing Mou Date: Fri, 10 Apr 2026 17:34:10 +0800 Subject: [PATCH v4 35/39] drm/msm/dp: wire MST helpers into atomic check and commit paths Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260410-msm-dp-mst-v4-35-b20518dea8de@oss.qualcomm.com> References: <20260410-msm-dp-mst-v4-0-b20518dea8de@oss.qualcomm.com> In-Reply-To: <20260410-msm-dp-mst-v4-0-b20518dea8de@oss.qualcomm.com> To: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Jessica Zhang Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, Yongxing Mou , Abhinav Kumar , Dmitry Baryshkov X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775813628; l=2569; i=yongxing.mou@oss.qualcomm.com; s=20250910; h=from:subject:message-id; bh=Zev8vjo6Ne+mGVU8pUaXaUCRweFkFvpilX34drpva4I=; b=oLVHjWdNRLabsfryin9mu2VygyEHy0KlEZWGjsfAvWgGqw0Wu2XMJSnTxRBbak8JM3wfZvw02 aqKHwYSOV/cB9Sy9m//i7f15vjCw1pzFgImBYhkgNwQglUOSW/UkaAa X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=rAy5J1eP+V7OXqH5FJ7ngMCtUrnHhut30ZTldOj52UM= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDEwMDA4OSBTYWx0ZWRfX+u+0zC5gCm7v ScCEcX0nYss+kTMPbs2hkWKLlmsSsPGfkZMZ2YTML3ThFRIbxJE50SjRjAkvM0Kw9JFUtkLPEOq VEngwQl0AM3BCzySjNewR9mlha29l0V1qM7SMQFi9SDCZUNCH1W/ypjK8iNkoFrQsxcCICyTstH qgsEfeVl2b0TWK5x8PDu++a/U7/W2QuCP50dxsLB/v83UsP6AAF62ZTrqRES3XzLTY1tzfZQfRp 0zXPxgRyxyGTDDwN6VmlVi7IF/vHN5bnPPtQcLIuvrc7CjLMhqsm0PqK22ouUgDWL69VEFHzUId ztJZbDiYCSJpuHKs1wTFeOwghhRUaoLzpFRTqcZIT4KQimEuOgOBq3GAXciJftMrHfeOXdlFgwC ryamycTqDmrs2FN41wg1ZwlbQdrqN/8VeDPQwK1BvCTMg04SdQ7Fe6qq9iMMEPnerJbbKS1hbhW hz0MgqNJFfBegJJoWWQ== X-Authority-Analysis: v=2.4 cv=eOcjSnp1 c=1 sm=1 tr=0 ts=69d8c4b0 cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=C3Dk8TwHQYyIj7nOf9RCJw==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=COk6AnOGAAAA:8 a=EUspDBNiAAAA:8 a=pGLkceISAAAA:8 a=WDpXsREKN9l9u-HpV_IA:9 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-GUID: H1x0LEMSO8zesMJhxlykY4BmwuZuP02J X-Proofpoint-ORIG-GUID: H1x0LEMSO8zesMJhxlykY4BmwuZuP02J X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-10_03,2026-04-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 bulkscore=0 suspectscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604100089 Call drm_dp_mst_atomic_check() from msm_atomic_check() so MST-specific state, such as connector and topology changes, is validated as part of the atomic check. Hook the MST helpers into atomic_commit_setup() and atomic_commit_tail() to support non-blocking atomic commits for DisplayPort MST, and ensure MST commits properly wait for dependencies. For SST, non-blocking commits are already handled via commit_tail(), which waits for dependencies in the DRM core. Signed-off-by: Abhinav Kumar Signed-off-by: Yongxing Mou Reviewed-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/msm_atomic.c | 9 ++++++++- drivers/gpu/drm/msm/msm_kms.c | 2 ++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 87a91148a731..ea064aa6d8fc 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -4,6 +4,7 @@ * Author: Rob Clark */ +#include #include #include @@ -207,7 +208,11 @@ int msm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state) if (ret) return ret; - return drm_atomic_helper_check(dev, state); + ret = drm_atomic_helper_check(dev, state); + if (ret) + return ret; + + return drm_dp_mst_atomic_check(state); } void msm_atomic_commit_tail(struct drm_atomic_state *state) @@ -221,6 +226,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state) trace_msm_atomic_commit_tail_start(async, crtc_mask); + drm_dp_mst_atomic_wait_for_dependencies(state); + kms->funcs->enable_commit(kms); /* diff --git a/drivers/gpu/drm/msm/msm_kms.c b/drivers/gpu/drm/msm/msm_kms.c index e5d0ea629448..a8f5fbb3239d 100644 --- a/drivers/gpu/drm/msm/msm_kms.c +++ b/drivers/gpu/drm/msm/msm_kms.c @@ -10,6 +10,7 @@ #include #include +#include #include #include #include @@ -29,6 +30,7 @@ static const struct drm_mode_config_funcs mode_config_funcs = { static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = { .atomic_commit_tail = msm_atomic_commit_tail, + .atomic_commit_setup = drm_dp_mst_atomic_setup_commit, }; static irqreturn_t msm_irq(int irq, void *arg) -- 2.43.0