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Tue, 30 Jun 2026 03:29:45 -0700 (PDT) X-Received: by 2002:a05:622a:44a:b0:51a:8c9b:64a5 with SMTP id d75a77b69052e-51c109079a0mr27106041cf.9.1782815384782; Tue, 30 Jun 2026 03:29:44 -0700 (PDT) Received: from [192.168.120.170] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c1288f4d90esm100637466b.45.2026.06.30.03.29.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Jun 2026 03:29:44 -0700 (PDT) Message-ID: Date: Tue, 30 Jun 2026 12:29:42 +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] arm64: dts: qcom: sc8280xp-huawei-gaokun3: Add dsi panel DT node To: Pengyu Luo Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260630042229.277799-1-mitltlatltl@gmail.com> <35f13ab2-cdba-426f-bf4b-36f53ce1d4bb@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: iopWcBgBQLlbrHU5kHTgCP21b83-0k9f X-Authority-Analysis: v=2.4 cv=AtDeGu9P c=1 sm=1 tr=0 ts=6a439a9a cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=EUspDBNiAAAA:8 a=pGLkceISAAAA:8 a=K0VU_phB8ntNZSznENYA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-ORIG-GUID: iopWcBgBQLlbrHU5kHTgCP21b83-0k9f X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjMwMDA5NSBTYWx0ZWRfXzCze/fX+I+GL qwQNaoXa0UxxlN05VmKgyReKDwjtlIVgyr9iQup5cOOl15vmt/r2PCnERgaB2QX1I8hWvdKli+Z rFK98OX9wQGHqJfduFA0G5EC0yWx5Lc20Wg4oOnz6NC5bF4Yi0Xmetmx/QG/XK0dLe7uK688uzf vGKEEf4FBZX+uIVQajVtpw2lrFoPWmxKjhIP7NbcgomQUdhC3AwJsrw9Pma0MTgwT6EMDCIhtjt kn4fvEXMFFnwcYsLn2oC6pEp2AAXuHMXwXcltF9fp9GKscDe2mmzd/OiAJdoYCZMfdJ3T7KqYUB tFt4TgjYk1hD7UXobRiAdCyafH8YaEeiWR3JtNMjPWLmtDd7GzBDtXpM388YqBwZV9MDZnAV+No WLx0urZovMO9grXwPAAPkhJ0/NmP+3/mTjpqLBS3dDtBh9v2zQsjHEzzw7zY7PKNmLRApOWXa3w f5mzt47hDa3pOwHSY9g== X-Proofpoint-Spam-Info: AW1haW4tMjYwNjMwMDA5NSBTYWx0ZWRfX7wKK07JMzyeB N8lAxzkA2Lj82Qdmpo0tg6jShfcZHndG+Y51/zouQKMMZOUibqvr+ivkmXCiqr+f6kSFtoOSj0T O5/CDibfkNYMl5OEMMOLACcCzGT1e1E= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-30_03,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 impostorscore=0 suspectscore=0 priorityscore=1501 adultscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606300095 On 6/30/26 11:28 AM, Pengyu Luo wrote: > On Tue, Jun 30, 2026 at 5:18 PM Konrad Dybcio > wrote: >> >> On 6/30/26 6:22 AM, Pengyu Luo wrote: >>> DSI panel driver have been added for a while, so add the DT node to >>> enable it. vdd{a,s}-supply for dsi, dsi_phy are blank since the DSDT >>> describes the wrong, no impact after manual disabling these wrong >>> supplies. >>> >>> Signed-off-by: Pengyu Luo >>> --- >> >> [...] >> >>> +&mdss0_dsi0 { >>> + /* real vdda is unknown */ >>> + >> >> L3B: DSI core 1.2 V (both?) >> L6B: DSI0/1 PLL and core 0.9 V >> > > Yes, that is what I saw in the DSDT, however, I can disable them > safely (hack the regulator driver to add a sysfs to handle these > regulators), the panel works well. L3B additionally powers CSIPHY2/3, EDP0/1, REFGEN (probably why it ends up being on), UFSPHY and USB1_PHY L6B additionally powers the same components, minus refgen and USB Konrad