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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-b4fb7d391casm11944947a12.7.2025.09.08.02.46.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 08 Sep 2025 02:46:37 -0700 (PDT) Message-ID: <69219cdd-bcca-4673-9a81-084184fda6db@oss.qualcomm.com> Date: Mon, 8 Sep 2025 17:46:30 +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: 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 , 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> Content-Language: en-US From: Yongxing Mou In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=Yv8PR5YX c=1 sm=1 tr=0 ts=68bea5ff cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=EUspDBNiAAAA:8 a=dWyAYXQ4UQf5hrxkvz4A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-GUID: HL_nXR6TEtbftaLbFQ0a_jnzQYK21Loi X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTA2MDAxOCBTYWx0ZWRfXzqEpYIC3Q3RG bL8PCdEAKphF/y69u3Xs4r5bx+dz5Q1atZ74K2zi7+ESvHb3hmCgIRiKwEZIop2om71XExP0ylr 6pkYF8ZL6+5WaFVufG2GOeE4ATtZaYTBK8L4NpiAQQhxvJ2XTiuO0in+CNCURY0nbw7RJ1k+sbF NsrFd/G7tNpJGWjWrx6UggwWKyqoB9zOa+yIHf1QVjYhfHwFNGZbcMfpVTxZYgbTrHJxB0GvSG2 +sZtckW4Xk0dBLkRQUE7S0am4piTeaG0JLA73qwYE3rK5rO/0pPF+cHnI4tLNb7gVEnIxQBH8jY TwIQ4vlAxD0VPrPTRnrW1Ricq+5oR7NCMbnNIIqQwV4biZl8gefgFT+dK3Ce/A/Sy2cQa/nIXLs c502XDD5 X-Proofpoint-ORIG-GUID: HL_nXR6TEtbftaLbFQ0a_jnzQYK21Loi 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 bulkscore=0 malwarescore=0 suspectscore=0 phishscore=0 clxscore=1015 spamscore=0 priorityscore=1501 impostorscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509060018 On 9/5/2025 9:48 PM, Dmitry Baryshkov 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 > > The DP controller is the same as the one present on SA8775P. > Yes, it is same.. I just want to confirm again—even if we only need DP0 for QCS8300, we can also use sa8775p as fallback, right? static const struct msm_dp_desc msm_dp_desc_sa8775p[] = { { .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true }, { .io_start = 0x0af5c000, .id = MSM_DP_CONTROLLER_1, .wide_bus_supported = true }, { .io_start = 0x22154000, .id = MSM_DP_CONTROLLER_2, .wide_bus_supported = true }, { .io_start = 0x2215c000, .id = MSM_DP_CONTROLLER_3, .wide_bus_supported = true }, {} }; .mst_streams = 4 is suitable for both QCS8300 and SA8775P DP 0 here. Previously, my understanding here was that we might need a new compatible for QCS8300. Thanks~~>>>> - qcom,sc7180-dp >>>> - qcom,sc7280-dp >