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Wed, 21 Oct 2026 03:06:27 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b40313258dsm679293a12.28.2026.10.21.03.06.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 21 Oct 2026 03:06:25 -0700 (PDT) Message-ID: <2196fe69-b520-4d1f-b04f-e32808b689f5@oss.qualcomm.com> Date: Wed, 21 Oct 2026 12:06:22 +0200 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/2] arm64: dts: qcom: purwa-iot-evk: Add eDP display overlay To: Anand Tiwari , Bjorn Andersson , Konrad Dybcio , Abel Vesa , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, vishnu.saini@oss.qualcomm.com References: <20260922-edp_overlay_for-next-v3-0-2758d46ee174@oss.qualcomm.com> <20260922-edp_overlay_for-next-v3-2-2758d46ee174@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260922-edp_overlay_for-next-v3-2-2758d46ee174@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=S/NMU4sP c=1 sm=1 tr=0 ts=6ad88ea4 cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=aQ57efiQKxvF-d_-SPoA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIxMDA0MCBTYWx0ZWRfX9OXEtYUatK/E Xg1bGlsTV+nDbK9kHrCZZqIeSDFxxjiFBJpgeX562Aeax9XkEFmdgW8a4M75FD3EXWBAwFiare/ 5GhUwQrltENP4Aj1n6ZHuW5SJeOvE1+zDScliuqcjI10unTvbPyKadeVt3vC/kfwAA/vQNX32S+ BJG2MI83VCW97fy/921EmtJ5BWZkK5PpY1fosuysZ84SX06LMRBwt2qw90a63OIH3IFyYzMsBGr bMK8d/OcL410LQAbzg4EJOVdOCGNirzeioiUVn7HzzqOFYUY6zMuczYqV59YUDYqA74lPcKh3Po fEBgxRoxEqr+Wqqj1J7dfIRt/aw0lcdIa6bP6ENdV98ONPc0g7ZpMCAKUjShLuOsO2UVu1KNitK J+b4yadZrG6NC7ftggbbJWruVtgKMvZmEq+VkCi2moYQ9iNwuBNEdEQfyj8/dwQHVztwObFEGKN kHOIEBBG099Codt68LQ== X-Proofpoint-ORIG-GUID: hk4vGhMwVhvHE-a1ufjZNM4RoDPWNT1x X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIxMDA0MCBTYWx0ZWRfXwVSCSr+yRk/S 2kURHMrfZO4l/r066yxNVa9gPtodQcP4d6xnmHq9/YxPomjMqDiLWpvY47uqtBCOi/1kleD0q+h OG/X6v8a/cVyATZDYZjbIthwP9EAy1U= X-Proofpoint-GUID: hk4vGhMwVhvHE-a1ufjZNM4RoDPWNT1x X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-21_03,2026-10-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1015 priorityscore=1501 spamscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610210040 On 9/22/26 12:42 PM, Anand Tiwari wrote: > Purwa IoT EVK variants are available with and without an eDP panel. > When the panel is not connected, DP3 is unused, but the base > DTS still describes the eDP panel and display path. > > This causes the eDP-panel driver to probe an unavailable panel, resulting > in AUX probe timeouts and missing display modes. Userspace then attempts > display commits through the eDP connector, causing repeated DPU vblank, > frame-done, and IRQ timeout errors. > > Move the DP3 and eDP panel specific nodes into an overlay so the base > DTB describes the configuration without the panel, while the overlay > enables eDP panel for boards with the panel connected. > > DT overlays cannot remove properties from a node defined in the base > DTB, so keeping the /delete-property/ of #sound-dai-cells in base DTS > where it takes effect. > > Signed-off-by: Anand Tiwari > --- Reviewed-by: Konrad Dybcio Konrad