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[129.46.232.65]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ac84cb135fsm19223386d6.38.2026.04.10.02.34.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Apr 2026 02:34:17 -0700 (PDT) From: Yongxing Mou Date: Fri, 10 Apr 2026 17:33:40 +0800 Subject: [PATCH v4 05/39] drm/msm/dp: splite msm_dp_ctrl_config_ctrl() into link parts and stream parts MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260410-msm-dp-mst-v4-5-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=3675; i=yongxing.mou@oss.qualcomm.com; s=20250910; h=from:subject:message-id; bh=DmfXjCm5CMc9QUMbnkHNM0IxZcwbFs2CBGArGw/Idno=; b=7G5maolJyW03eOOrJe143+E2cKWyrZ1ycbAl/ZXheE5fZZAsi3OHRYzrm1PHPPDxJTT+h0RKX uFRXrK3cxSYADbg4RG8qLETRnSktXeuwyLymw6DeUzJft5BtRV/zQ90 X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=rAy5J1eP+V7OXqH5FJ7ngMCtUrnHhut30ZTldOj52UM= X-Proofpoint-ORIG-GUID: wW11ezNoOJr-Qaqlr4GT87PfF7DGTwu9 X-Proofpoint-GUID: wW11ezNoOJr-Qaqlr4GT87PfF7DGTwu9 X-Authority-Analysis: v=2.4 cv=Ko59H2WN c=1 sm=1 tr=0 ts=69d8c41b cx=c_pps a=wEM5vcRIz55oU/E2lInRtA==:117 a=C3Dk8TwHQYyIj7nOf9RCJw==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=N4WGanfLxQUAwF0MUGsA:9 a=QEXdDO2ut3YA:10 a=OIgjcC2v60KrkQgK7BGD:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDEwMDA4OCBTYWx0ZWRfX7/tN+BmGqxtV HxbT/Tx9RVwcdgb8TBqhsUZqgkMNSDnMazm945cJSLEzkpMs8E8hUrb8IOqdnOAed4JvERJfGAE bGSgbot53bkrRxBTZh9GLSd+kSbwyX59BcLvOkpojmTLwK26INA2EZ9+BNjQ88HiB0TMPNzBPZF L5jpQXcxCxfMel3Bn4ipUy9LermuTZBX99lrFSneM+EfI/Wu0KCQNnvaSjFA1zvnct0KIU6yn1y eop2PtA7ysioRf7M8Yfy1mdAvP8K3KnW5cvrxgvzHXdWs2H84M72qf8e3CVzLMRhcduGFuPJy4u d1tuXXwYv1D+BBR6/nCdKeiYq6pZpybGKo+1HZlbM/K/4akaRVgtrE6VidfNMEZLlJkrqDUsvNf H35FR7xCMHIjmjSBic2d6OBfjGbM/Q6Kgo7Kuph9y97+fR+o8Y4biPdQi7+pDcQLiInEiJsQyYm x3nu2Jrm50LimYPGFVg== 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 malwarescore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 phishscore=0 bulkscore=0 spamscore=0 suspectscore=0 impostorscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604100088 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The DP_CONFIGURATION_CTRL register contains both link-level and stream-specific fields. Currently, msm_dp_ctrl_config_ctrl() configures all of them together. Separates the configuration into link parts and streams part for support MST. Signed-off-by: Yongxing Mou --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 43 ++++++++++++++++++++++++++-------------- 1 file changed, 28 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 476346e3ac19..85315467b5d0 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -388,26 +388,41 @@ void msm_dp_ctrl_push_idle(struct msm_dp_ctrl *msm_dp_ctrl) drm_dbg_dp(ctrl->drm_dev, "mainlink off\n"); } -static void msm_dp_ctrl_config_ctrl(struct msm_dp_ctrl_private *ctrl) +static void msm_dp_ctrl_config_ctrl_streams(struct msm_dp_ctrl_private *ctrl, + struct msm_dp_panel *msm_dp_panel) { u32 config = 0, tbd; + + config = msm_dp_read_link(ctrl, REG_DP_CONFIGURATION_CTRL); + + if (msm_dp_panel->msm_dp_mode.out_fmt_is_yuv_420) + config |= DP_CONFIGURATION_CTRL_RGB_YUV; /* YUV420 */ + + tbd = msm_dp_link_get_test_bits_depth(ctrl->link, + msm_dp_panel->msm_dp_mode.bpp); + + config |= tbd << DP_CONFIGURATION_CTRL_BPC_SHIFT; + + if (msm_dp_panel->psr_cap.version) + config |= DP_CONFIGURATION_CTRL_SEND_VSC; + + drm_dbg_dp(ctrl->drm_dev, "stream DP_CONFIGURATION_CTRL=0x%x\n", config); + + msm_dp_write_link(ctrl, REG_DP_CONFIGURATION_CTRL, config); +} + +static void msm_dp_ctrl_config_ctrl_link(struct msm_dp_ctrl_private *ctrl) +{ + u32 config = 0; const u8 *dpcd = ctrl->panel->dpcd; /* Default-> LSCLK DIV: 1/4 LCLK */ config |= (2 << DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT); - if (ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420) - config |= DP_CONFIGURATION_CTRL_RGB_YUV; /* YUV420 */ - /* Scrambler reset enable */ if (drm_dp_alternate_scrambler_reset_cap(dpcd)) config |= DP_CONFIGURATION_CTRL_ASSR; - tbd = msm_dp_link_get_test_bits_depth(ctrl->link, - ctrl->panel->msm_dp_mode.bpp); - - config |= tbd << DP_CONFIGURATION_CTRL_BPC_SHIFT; - /* Num of Lanes */ config |= ((ctrl->link->link_params.num_lanes - 1) << DP_CONFIGURATION_CTRL_NUM_OF_LANES_SHIFT); @@ -421,10 +436,7 @@ static void msm_dp_ctrl_config_ctrl(struct msm_dp_ctrl_private *ctrl) config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; - if (ctrl->panel->psr_cap.version) - config |= DP_CONFIGURATION_CTRL_SEND_VSC; - - drm_dbg_dp(ctrl->drm_dev, "DP_CONFIGURATION_CTRL=0x%x\n", config); + drm_dbg_dp(ctrl->drm_dev, "link DP_CONFIGURATION_CTRL=0x%x\n", config); msm_dp_write_link(ctrl, REG_DP_CONFIGURATION_CTRL, config); } @@ -450,7 +462,8 @@ static void msm_dp_ctrl_configure_source_params(struct msm_dp_ctrl_private *ctrl msm_dp_ctrl_lane_mapping(ctrl); msm_dp_setup_peripheral_flush(ctrl); - msm_dp_ctrl_config_ctrl(ctrl); + msm_dp_ctrl_config_ctrl_link(ctrl); + msm_dp_ctrl_config_ctrl_streams(ctrl, ctrl->panel); test_bits_depth = msm_dp_link_get_test_bits_depth(ctrl->link, ctrl->panel->msm_dp_mode.bpp); colorimetry_cfg = msm_dp_link_get_colorimetry_config(ctrl->link); @@ -1628,7 +1641,7 @@ static int msm_dp_ctrl_link_train(struct msm_dp_ctrl_private *ctrl, u8 assr; struct msm_dp_link_info link_info = {0}; - msm_dp_ctrl_config_ctrl(ctrl); + msm_dp_ctrl_config_ctrl_link(ctrl); link_info.num_lanes = ctrl->link->link_params.num_lanes; link_info.rate = ctrl->link->link_params.rate; -- 2.43.0