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Tue, 30 Jun 2026 03:34:11 -0700 (PDT) X-Received: by 2002:a05:6102:6886:b0:738:8d0f:72a3 with SMTP id ada2fe7eead31-73a3853a35fmr523877137.4.1782815650930; Tue, 30 Jun 2026 03:34:10 -0700 (PDT) Received: from [192.168.120.170] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6987c968201sm917585a12.24.2026.06.30.03.34.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Jun 2026 03:34:10 -0700 (PDT) Message-ID: <250311af-0860-4a76-9799-c01608b87293@oss.qualcomm.com> Date: Tue, 30 Jun 2026 12:34:07 +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: gIvYbm3OH5V7Bv5Dn8YjnasWOJLX3GdB X-Proofpoint-Spam-Info: AW1haW4tMjYwNjMwMDA5NSBTYWx0ZWRfX+5ztArxEaxGh VXU4zjYdmJC7ufjGk4QOZ4x0h1EIOjohGuYXVxiL41rFUsVSuNTTccVo+40sa1l4+BPj+SddKYp tCaNsATn+d9dg8TmgMqWmiBwhLHwBDM= X-Authority-Analysis: v=2.4 cv=JI0LdcKb c=1 sm=1 tr=0 ts=6a439ba4 cx=c_pps a=R6oCqFB+Yf/t2GF8e0/dFg==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=pGLkceISAAAA:8 a=AfCMliE2q1qzQo8TwlgA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=TD8TdBvy0hsOASGTdmB-:22 X-Proofpoint-ORIG-GUID: gIvYbm3OH5V7Bv5Dn8YjnasWOJLX3GdB X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjMwMDA5NSBTYWx0ZWRfX2uF/wJSQNQVp xkHaDrzqxAMC0ZQEPrHUC665NBNh8YKPkGFDLtc6A2RYyWiVXtcxQhrIY6eanB1vMPcKdlwaahS MY2DL+hZE6bUO8aq+gaejvs+hzJTGprq7n8iANArU5GAOumpe7AFHP/ybtFHMcnLw1HWhug7Zo4 sUTyO3FXWT45PM8rJi9wP71aFvLTIg55iDT8EqzUT1axHKyp27e3IXMBaaiEaLCYycLWb+5GOwK p7mso/N08SWvdQ4IHhrtfcvEgVYo6IeqZqEyHBATwBZfQi1DjHItbESbUb8QpERgDcpablhIUwf 6N8z0r89sXxVSG4COWytPtamUnyekMHqze322+MV6CPhhN+p7lt5yIxab9k+HpVvxRdn6t/zp76 OKxq1wR+9XqMFq9MixbckEmkZUHVStQCEIiK/8V+7Pu+T2VT/eKDdBqX/VKI9w7h6w/sPztjl8I 8YgZAZMzf+eRivjimeQ== 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 priorityscore=1501 clxscore=1015 impostorscore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=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 12:30 PM, Pengyu Luo wrote: > On Tue, Jun 30, 2026 at 6:29 PM Konrad Dybcio > wrote: >> >> 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 >> > > No, I confirmed they are totally disabled, since there is a way to check it now. > https://lore.kernel.org/linux-arm-msm/20260420-read-rpmh-v3-v4-0-70c152e6c958@oss.qualcomm.com/ This presents you with the status of the votes casted by HLOS, not the actual hardware state To get the latter, you'd have to dump the SPMI registers Konrad