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[129.46.232.65]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ac84cb135fsm19223386d6.38.2026.04.10.02.36.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Apr 2026 02:36:31 -0700 (PDT) From: Yongxing Mou Date: Fri, 10 Apr 2026 17:34:07 +0800 Subject: [PATCH v4 32/39] drm/msm/dpu: initialize encoders per stream for DP MST 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-v4-32-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 X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775813628; l=2364; i=yongxing.mou@oss.qualcomm.com; s=20250910; h=from:subject:message-id; bh=hh7cPjxyA+5XkQy2l4wuOiGfJywbpFosqHP2MMCA2HE=; b=P2+SxIBHLLxI66zJRWxm2TlBTA3piaOS0zYEWENl24H+1AWttps72/9mFA4jfPDqTRWHyrQ5g r22R534dqxGA5SL6ieWB9KE3KchshXYhUDljaLOApiAnU9enNx1wrQY X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=rAy5J1eP+V7OXqH5FJ7ngMCtUrnHhut30ZTldOj52UM= X-Proofpoint-GUID: x1QBPkh4JSrfMT8WzE-rf-8zkLddmd_q X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDEwMDA4OSBTYWx0ZWRfX121fv2OnTcDx 62t7F7zy0hmB3JHKkqVA2vqbwzWO0JWCe0SlwE/uP5NhGPK9yLdoQqu+ZKW5ulQ05xVLek9PcS/ B3jBjEhMtYaUNHAm0JYNzytJrRHvCM66JPSWIqhmYLhNB4T4zpVI3aNbgRcRLJxOynkHvxY5vVO j8XshNg4btAABNbUR7K+ZB/9QD2VigmutfL/t4jvJxaiqMnbP9XoIQ2SlzjNPxwZJPqQ5QHv21l hN0Exzrt3rFkSrLBqMMycWeWdQ3c8bVimOvyHO3NDV8ghqIiVJngv4OKeK1hCVsM9gP2II63CXU nH+zbxVOg/COKNosqXkqnTEn/MsBjDQk5MZjXleXBQ0Spam0+QX3xbxF93P14bpNyDNsvAlQKnQ yomnEke0LIGQULUGdAuiPjZNF0TBWSAikdArOzmg8Qv3dRjKblFPMr7zQgVNlezILeTb6Cc+TbE PM5PgKch9//Slb3zAXw== X-Proofpoint-ORIG-GUID: x1QBPkh4JSrfMT8WzE-rf-8zkLddmd_q X-Authority-Analysis: v=2.4 cv=DslmPm/+ c=1 sm=1 tr=0 ts=69d8c4a1 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=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=CHjaKMol-vWaWBnFkvwA:9 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 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 phishscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 malwarescore=0 clxscore=1015 impostorscore=0 bulkscore=0 priorityscore=1501 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604100089 Simply initialize MST encoders for MST-capable DP controllers, and introduce msm_dp_get_mst_max_stream to query MST streams. Signed-off-by: Yongxing Mou --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 14 +++++++++++++- drivers/gpu/drm/msm/msm_drv.h | 7 ++++++- 2 files changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 61d7e65469b3..090e7d790593 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -653,7 +653,7 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev, struct msm_display_info info; bool yuv_supported; int rc; - int i; + int i, stream_id, stream_cnt; for (i = 0; i < ARRAY_SIZE(priv->kms->dp); i++) { if (!priv->kms->dp[i]) @@ -676,6 +676,18 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev, DPU_ERROR("modeset_init failed for DP, rc = %d\n", rc); return rc; } + + stream_cnt = msm_dp_get_mst_max_stream(priv->kms->dp[i]); + + if (stream_cnt > 1) { + for (stream_id = 0; stream_id < stream_cnt; stream_id++) { + encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_DPMST, &info); + if (IS_ERR(encoder)) { + DPU_ERROR("encoder init failed for dp mst display\n"); + return PTR_ERR(encoder); + } + } + } } return 0; diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 6d847d593f1a..3061eca49cb2 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -362,7 +362,7 @@ bool msm_dp_is_yuv_420_enabled(const struct msm_dp *dp_display, bool msm_dp_needs_periph_flush(const struct msm_dp *dp_display, const struct drm_display_mode *mode); bool msm_dp_wide_bus_available(const struct msm_dp *dp_display); - +int msm_dp_get_mst_max_stream(struct msm_dp *dp_display); #else static inline int __init msm_dp_register(void) { @@ -379,6 +379,11 @@ static inline int msm_dp_modeset_init(struct msm_dp *dp_display, return -EINVAL; } +static inline int msm_dp_get_mst_max_stream(struct msm_dp *dp_display) +{ + return -EINVAL; +} + static inline void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display) { } -- 2.43.0