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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7722a2b65a2sm29336054b3a.34.2025.09.08.02.46.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 08 Sep 2025 02:46:23 -0700 (PDT) Message-ID: <4a475efc-7da6-4456-ba6a-ef3320fea3d2@oss.qualcomm.com> Date: Mon, 8 Sep 2025 17:46:14 +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 v11 2/6] dt-bindings: display/msm: dp-controller: document QCS8300 compatible To: Krzysztof Kozlowski Cc: Dmitry Baryshkov , 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 , Neil Armstrong , Kuogee Hsieh , Bjorn Andersson , Konrad Dybcio , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250904-qcs8300_mdss-v11-0-bc8761964d76@oss.qualcomm.com> <20250904-qcs8300_mdss-v11-2-bc8761964d76@oss.qualcomm.com> <20250905-indigo-mastiff-of-aptitude-b89e0a@kuoka> Content-Language: en-US From: Yongxing Mou In-Reply-To: <20250905-indigo-mastiff-of-aptitude-b89e0a@kuoka> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTA2MDAzMSBTYWx0ZWRfX93zsiVXlOJia 2qAiK1xT8GdfZ6sj4iLWORLxvI/0bogtVYmPSJREovdN68hfAw6azvFtYsMNgYG+RHxuabwiP/E Y6LdYIFU4t2eecY4kYyJzhtA6lG5neTiv9kFX9a90WxSOmLO2lHIYJLjtWhwjnNk4OW6yPEnlBz Gv1y/yZ6UWfiI0UfdbN4bO3t7tYDfwZ9j827kVpFCMQmNiTFhHU2oNjxU8yZILYtY/7DUZ2tjzC FCDJJ4itiLnBvBRHg2qASFT0Yj4q6mrKVkrXrHRpjnnHtELB2MrgOViTEu6Kf45eQHiOUHv5kHe ucUBp5elvYSLStCXHH1m+elHI3oKPNz+xJcMKk/2ax9AWYMrHqo+eGNaR7BLYxanL3eRnjiO4fN 7NARRo3T X-Proofpoint-ORIG-GUID: LbKEu4VBIRjfdDEGq9HFE2bN7RLGLYo0 X-Proofpoint-GUID: LbKEu4VBIRjfdDEGq9HFE2bN7RLGLYo0 X-Authority-Analysis: v=2.4 cv=VIDdn8PX c=1 sm=1 tr=0 ts=68bea5f1 cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=EUspDBNiAAAA:8 a=6QMyuPo7PgMWPuL3cUUA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=zc0IvFSfCIW2DFIPzwfm:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-08_03,2025-09-08_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 spamscore=0 suspectscore=0 bulkscore=0 phishscore=0 adultscore=0 clxscore=1015 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509060031 On 9/5/2025 4:25 PM, Krzysztof Kozlowski wrote: > On Fri, Sep 05, 2025 at 10:50:33AM +0800, Yongxing Mou wrote: >> >> >> On 9/4/2025 9:43 PM, Dmitry Baryshkov wrote: >>> On Thu, Sep 04, 2025 at 03:22:37PM +0800, Yongxing Mou wrote: >>>> Add compatible string for the DisplayPort controller found on the >>>> Qualcomm QCS8300 SoC. >>>> >>>> The Qualcomm QCS8300 platform comes with one DisplayPort controller >>>> that supports 4 MST streams. >>>> >>>> Signed-off-by: Yongxing Mou >>>> --- >>>> .../bindings/display/msm/dp-controller.yaml | 22 ++++++++++++++++++++++ >>>> 1 file changed, 22 insertions(+) >>>> >>>> diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml >>>> index aeb4e4f36044a0ff1e78ad47b867e232b21df509..ad08fd11588c45698f7e63ecc3218a749fc8ca67 100644 >>>> --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml >>>> +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml >>>> @@ -18,6 +18,7 @@ properties: >>>> compatible: >>>> oneOf: >>>> - enum: >>>> + - qcom,qcs8300-dp >>> >>> Can we use fallback to qcom,sa8775p-dp instead of declaring a completely >>> new one? >>> >> I think we can not use fallback to sa8775p, since we don't have DP1 >> controller for QCS8300. SA8775P actually have 4 DP controllers (now only 2 >> really used). So in the hardware, i think it is different with SA8775P and >> we need a new one.>> - qcom,sa8775p-dp > > I don't understand how this rationale explains what Dmitry asked. > > Why number of IP blocks (and this is DPx, right?) matter? Are you sure > you understand what compatibility means? Please read the slides from > OSSE25 or just read writing bindings. > > Best regards, > Krzysztof > Sure.. I’ll discuss this further here to make sure I fully understand these comments.