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Fri, 6 Dec 2024 04:32:41 GMT Received: from abhinavk-linux1.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 5 Dec 2024 20:32:40 -0800 From: Abhinav Kumar Date: Thu, 5 Dec 2024 20:32:00 -0800 Subject: [PATCH 29/45] drm/msm/dp: skip reading the EDID for MST cases Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20241205-dp_mst-v1-29-f8618d42a99a@quicinc.com> References: <20241205-dp_mst-v1-0-f8618d42a99a@quicinc.com> In-Reply-To: <20241205-dp_mst-v1-0-f8618d42a99a@quicinc.com> To: Rob Clark , Dmitry Baryshkov , Sean Paul , Marijn Suijten , David Airlie , "Simona Vetter" , Stephen Boyd , "Chandan Uddaraju" , Guenter Roeck , Kuogee Hsieh , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: Vara Reddy , Rob Clark , Tanmay Shah , , , , , , Jessica Zhang , Laurent Pinchart , Abhinav Kumar X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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Skip the EDID read during hotplug handle for MST cases. Signed-off-by: Abhinav Kumar --- drivers/gpu/drm/msm/dp/dp_display.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 033d238e956263c1212fce45aab01316ef341edb..a67bc7c1b83a5a9996435804ff7337f72dae93a0 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -420,9 +420,11 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) if (rc) goto end; - rc = msm_dp_panel_read_edid(dp->panel, connector); - if (rc) - goto end; + if (dp->max_stream <= DEFAULT_STREAM_COUNT || !msm_dp_panel_read_mst_cap(dp->panel)) { + rc = msm_dp_panel_read_edid(dp->panel, connector); + if (rc) + goto end; + } msm_dp_link_process_request(dp->link);