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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-61cfc4bbc6bsm9385161a12.29.2025.09.02.03.42.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 02 Sep 2025 03:42:49 -0700 (PDT) Message-ID: Date: Tue, 2 Sep 2025 12:42:44 +0200 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: Xiangxu Yin , 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> <75f8789d-9d97-49d9-97b0-908a5692c325@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <75f8789d-9d97-49d9-97b0-908a5692c325@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODMwMDAxOSBTYWx0ZWRfX/gl9wCNsxEHd 6lAigVqY8QQxxVeqJ/uxQKTJln48v6La38mksgdINPXoGvZslI18Ih4Knlp7huhJXe9zIagKaVG ETishA+EOWWQi3rNf8m9erf/JN508Y9Hf/I6EShn64/RjbRe7g1a+boVhofX9/yNZIScnCmtg0G IV84xN4OGRyL1QF+j3twWGViIglB6dKGNknFCT8m6TSB/rr6GyjLexG5CUok9YzAqXqNmIYhdMe VqZeOA3G+DrX55nhSDUryh4k4P6N4OIRYnFeuBbLl9IUIveMiewCwok8O6iIEjWWkD/L4kiBWTl T68YrTGym1fhgSJycfAVit178tkBvlVryq04oV0noVvHAtyEnbyQ/fGlJ0+Eh7tlROFIumAkyLA I0CDnHhK X-Proofpoint-GUID: ZmdJIU5wUtc3MBmb_9-xuJyq2kO6g9hX X-Proofpoint-ORIG-GUID: ZmdJIU5wUtc3MBmb_9-xuJyq2kO6g9hX X-Authority-Analysis: v=2.4 cv=PNkP+eqC c=1 sm=1 tr=0 ts=68b6ca2c cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=zKpf_v0BVtz8pCFJhw8A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X: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=2025-09-02_03,2025-08-28_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 suspectscore=0 adultscore=0 phishscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508300019 On 9/1/25 2:32 PM, Xiangxu Yin wrote: > > 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. dt-bindings must describe the hardware regardless of the current driver functionality (which is unfortunately something we've not paid sufficient attention to before and we're now untangling some messy files..) Konrad