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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-65fabd362basm474939a12.4.2026.02.26.05.42.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Feb 2026 05:42:50 -0800 (PST) Message-ID: Date: Thu, 26 Feb 2026 14:42:47 +0100 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 v2 1/3] dt-bindings: display: panel: Add Samsung S6E8FCO To: Krzysztof Kozlowski , Yedaya Katsman Cc: Neil Armstrong , Jessica Zhang , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , =?UTF-8?Q?Kamil_Go=C5=82da?= , Bjorn Andersson , Konrad Dybcio , ~postmarketos/upstreaming@lists.sr.ht, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20260223-panel-patches-v2-0-1b6ad471d540@gmail.com> <20260223-panel-patches-v2-1-1b6ad471d540@gmail.com> <20260224-bulky-rabbit-of-courtesy-83fabc@quoll> <54abd390-113a-4c99-b024-2029c4d68099@kernel.org> <26dc41ef-1a98-4a16-a60d-c7654acba758@kernel.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <26dc41ef-1a98-4a16-a60d-c7654acba758@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjI2MDEyNCBTYWx0ZWRfX6ihSIPGRNWAx vstAWUUi9Pm56usM7qZRJRhqyBTSVMSVp/NV2z4L+wSRRmQFTsdNgE9Uj2AoZToOs7c9kAPZO1i +qVfknjDm0TmvcIX0sTBmlgQRTBT+fFYX1tZTvkzdhbwcV2bGV3V/SDnp0AozWga5DzKpoK4ZvS /w8CQHt3d8nOyp8x51yZp/3u34l0ZRNurkL5PaZAvAfRlM/oSdxfMEpKvTY7jGZ/kb38cbTZSbP iCrUuB0z5cU+JkJXxqd+gV83ld/pJ4BtwCJBIqtu2YDiSUOzJg8Sy+unbtzAehuHXiTqBbjSrk3 vFsVVeCpeHJUNl6FkOr+O6lXB0eJG+lozHrquNUWK+eFvDtbjP1G8ijwbK/JBpbyiNYkexQH58G DbPQbM9P31xlcG4Nrq7q9u3G7gkPYl6EB8gNkShl9HU8zlyOgXfJVksibPkMbe97duzhXf9czEx LPJcCIinB64JU7AUv4Q== X-Authority-Analysis: v=2.4 cv=O780fR9W c=1 sm=1 tr=0 ts=69a04ddc cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=Uyhorv2uAAAA:20 a=8pif782wAAAA:8 a=VwQbUJbxAAAA:8 a=qMnUWKRm8hXzxSHbM24A:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 a=bA3UWDv6hWIuX7UZL3qL:22 X-Proofpoint-ORIG-GUID: VwOxlMZ_teYqxALPfMB2MdOz6nm3VeFY X-Proofpoint-GUID: VwOxlMZ_teYqxALPfMB2MdOz6nm3VeFY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-25_04,2026-02-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 adultscore=0 spamscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 bulkscore=0 impostorscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2602260124 On 2/26/26 7:55 AM, Krzysztof Kozlowski wrote: > On 25/02/2026 21:03, Yedaya Katsman wrote: >> On Wed, 25 Feb 2026 at 17:45, Krzysztof Kozlowski wrote: >>> >>> On 25/02/2026 16:29, Yedaya Katsman wrote: >>>>>> + vddio-supply: true >>>>>> + ldo-supply: true >>>>> >>>>> LDO is the name of the type of regulator. Why is it called as name of >>>>> the supply? >>>> Can you explain more what you mean? Do you mean to change the name of >>>> the property? It seems that all the regulator properties are named >>>> foo-supply. >>> >>> I just have doubts that the device has supplied called LDO, considering >>> what LDO means. >> OK. I don't really have a way to verify if it's true, all I have is >> the downstream dts >> which calls it LDO [0] >> >> [0] https://github.com/MiCode/Xiaomi_Kernel_OpenSource/blob/d3766fc8cda2d96de2850faa9ce58e5a37ea9f9c/arch/arm64/boot/dts/qcom/trinket-sde-display.dtsi#L24-L36 > > Obviously the regulator is LDO, so they called it. Most of the > regulators are LDO, so why VDD IN is not called LDO? > > This is name of the supply in this device. Yedaya, in case you didn't catch it, LDO is an acronym: https://en.wikipedia.org/wiki/Low-dropout_regulator The vendor driver probably calls it that, because the input leg of the panel's driver IC just so happens to be connected to a regulator of this kind If we don't know the actual name of that input and have no way to verify it, I think 'power-supply' would be a good generic consensus, it happens to be reasonably common across other bindings Konrad