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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-249066e1158sm104253735ad.144.2025.09.01.05.32.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Sep 2025 05:33:02 -0700 (PDT) Message-ID: <75f8789d-9d97-49d9-97b0-908a5692c325@oss.qualcomm.com> Date: Mon, 1 Sep 2025 20:32:54 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 01/14] dt-bindings: display/msm: dp-controller: Add sm6150 To: Dmitry Baryshkov Cc: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Sean Paul , Marijn Suijten , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kuogee Hsieh , Vinod Koul , Kishon Vijay Abraham I , Philipp Zabel , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, fange.zhang@oss.qualcomm.com, yongxing.mou@oss.qualcomm.com, tingwei.zhang@oss.qualcomm.com, Bjorn Andersson , Konrad Dybcio , quic_lliu6@quicinc.com References: <20250820-add-displayport-support-for-qcs615-platform-v3-0-a43bd25ec39c@oss.qualcomm.com> <20250820-add-displayport-support-for-qcs615-platform-v3-1-a43bd25ec39c@oss.qualcomm.com> <75ra2ofecqu6tid6kr4hnyuztpl6jjaq2ksyquafyajhq2sa4d@4tkggrdqky7y> <8918feef-219e-4e69-8901-367189f5066d@oss.qualcomm.com> <28b33851-24eb-428f-b046-b145342fd982@oss.qualcomm.com> From: Xiangxu Yin In-Reply-To: <28b33851-24eb-428f-b046-b145342fd982@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 2wUvu5mPTUo_zpUSRQec3TufaMLuyRdd X-Proofpoint-GUID: 2wUvu5mPTUo_zpUSRQec3TufaMLuyRdd X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODMwMDAyMCBTYWx0ZWRfX4VQwMNOEpMYe mplRevf+tI+mb3edRZX+BDrADoQmFCle/IX6YVYwMZqN6h78jURFmHsVzPezIOjC14LAVkftJcv 5KUWKKOzynRjXNQ0zMSYZXc4RMa+GR0jrqlvpGnuOvJDS5WOM/GCruVzOm/BqGuna0nTBGMrSSv mE6DiTu/Kgi9lCZCh5zDjwoJ34SMPYUiKN1NezmNnSLFCcAy6hsVCrKNq1GLZ6JBnGt23FAaec1 WvG0f1dVz9ZfBNFXVzEkcURpOIFkfJeYc2t4Jk1hiSFZzJZXxyagE1TSfLcfJUiTg5gPw/Dy993 OOPKrP0kfqB63Y7nA/xHqzVxlgWLCqijxvJcf80paWHd1tdEHkwkxksO3rBdbhmGJHpL9iUYW8R lGmo+j2H X-Authority-Analysis: v=2.4 cv=VNndn8PX c=1 sm=1 tr=0 ts=68b59280 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=ZffzQ4fVxSrCOw2gOQ0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-01_05,2025-08-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 spamscore=0 impostorscore=0 malwarescore=0 bulkscore=0 clxscore=1015 adultscore=0 priorityscore=1501 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508300020 On 8/28/2025 7:05 PM, Dmitry Baryshkov wrote: > On 28/08/2025 07:51, Xiangxu Yin wrote: >> >> On 8/20/2025 6:18 PM, Dmitry Baryshkov wrote: >>> On Wed, Aug 20, 2025 at 05:34:43PM +0800, Xiangxu Yin wrote: >>>> Add DisplayPort controller for Qualcomm SM6150 SoC. >>>> While SM6150 currently shares the same configuration as SC7180, >>>> its hardware capabilities differ. Explicitly listing it ensures clarity >>>> and avoids potential issues if SC7180 support evolves in the future. >>> I assume, it has no MST support. Am I right? >> >> >>  From sm6150 ipcat, I found MST-related registers and pixel1 clk definition. > > Then please describe MST as the main difference between SM6150 and SC7180 (which doesn't have MST). > > Also this needs to be rebased on top of the MST bindings. I've picked up the latest posted revision, but basing on the on-list discussion I might need to drop it and post another iteration.  > Would you prefer I keep the current patch and update the description of the MST capability difference with SC7180 in the commit message, or rebase on your series and update the dt-binding accordingly? https://lore.kernel.org/all/20250829-dp_mst_bindings-v7-0-2b268a43917b@oss.qualcomm.com Since MST support is not yet mainlined in the DP driver, even if I rebase now, the final implementation may require redefining msm_dp_desc for SM6150 in both the dt-binding and the driver once MST lands. >> >> According to the hardware spec, MST is supported, but due to limitations in clock and pipe resources, >> >> the maximum concurrency capability is restricted to 1920x1200@60 + 1280x720@60. >> >> >>>> Signed-off-by: Xiangxu Yin >>>> --- >>>>   Documentation/devicetree/bindings/display/msm/dp-controller.yaml | 1 + >>>>   1 file changed, 1 insertion(+) >>>> >>>> diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml >>>> index 9923b065323bbab99de5079b674a0317f3074373..996d0132e084d401db85014a1a4e445d00d62ed8 100644 >>>> --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml >>>> +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml >>>> @@ -27,6 +27,7 @@ properties: >>>>             - qcom,sc8280xp-dp >>>>             - qcom,sc8280xp-edp >>>>             - qcom,sdm845-dp >>>> +          - qcom,sm6150-dp >>>>             - qcom,sm8350-dp >>>>             - qcom,sm8650-dp >>>>         - items: >>>> >>>> --  >>>> 2.34.1 >>>> > >