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([2a01:e0a:106d:1080:9476:5165:3a16:262]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4abf7146621sm276611165e9.13.2026.11.02.05.24.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Nov 2026 05:24:10 -0800 (PST) Message-ID: <620eb58a-bd8a-4679-84de-0285f10e0262@linaro.org> Date: Mon, 2 Nov 2026 14:24:09 +0100 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 From: Neil Armstrong Reply-To: Neil Armstrong Subject: Re: [PATCH 2/4] drm/panel: himax-hx8279: add the VDDP supply To: David Lechner , Jessica Zhang , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , AngeloGioacchino Del Regno , Matthias Brugger Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org References: <20261006-panel-himax-hx8279-vddp-v1-0-50d884b42aae@baylibre.com> <20261006-panel-himax-hx8279-vddp-v1-2-50d884b42aae@baylibre.com> Content-Language: en-US, fr Autocrypt: addr=neil.armstrong@linaro.org; keydata= xsBNBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAHNKk5laWwgQXJtc3Ryb25nIDxuZWlsLmFybXN0cm9uZ0BsaW5hcm8ub3JnPsLAkQQTAQoA OwIbIwULCQgHAwUVCgkICwUWAgMBAAIeAQIXgBYhBInsPQWERiF0UPIoSBaat7Gkz/iuBQJk Q5wSAhkBAAoJEBaat7Gkz/iuyhMIANiD94qDtUTJRfEW6GwXmtKWwl/mvqQtaTtZID2dos04 YqBbshiJbejgVJjy+HODcNUIKBB3PSLaln4ltdsV73SBcwUNdzebfKspAQunCM22Mn6FBIxQ GizsMLcP/0FX4en9NaKGfK6ZdKK6kN1GR9YffMJd2P08EO8mHowmSRe/ExAODhAs9W7XXExw UNCY4pVJyRPpEhv373vvff60bHxc1k/FF9WaPscMt7hlkbFLUs85kHtQAmr8pV5Hy9ezsSRa GzJmiVclkPc2BY592IGBXRDQ38urXeM4nfhhvqA50b/nAEXc6FzqgXqDkEIwR66/Gbp0t3+r yQzpKRyQif3OwE0ETVkGzwEIALyKDN/OGURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYp QTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXMcoJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+ SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hiSvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY 4yG6xI99NIPEVE9lNBXBKIlewIyVlkOaYvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoM Mtsyw18YoX9BqMFInxqYQQ3j/HpVgTSvmo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUX oUk33HEAEQEAAcLAXwQYAQIACQUCTVkGzwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfn M7IbRuiSZS1unlySUVYu3SD6YBYnNi3G5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa3 3eDIHu/zr1HMKErm+2SD6PO9umRef8V82o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCS KmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy 4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJC3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTT QbM0WUIBIcGmq38+OgUsMYu4NzLu7uZFAcmp6h8g Organization: Linaro In-Reply-To: <20261006-panel-himax-hx8279-vddp-v1-2-50d884b42aae@baylibre.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/6/26 22:25, David Lechner wrote: > Get and enable the vddp-supply along with VDD and IOVCC. > > The Startek KD070FHFID078 panel has a VDDP power input, which the > MediaTek Genio 520 and 720 EVKs switch with a regulator of its own, so > the driver has to enable it for the panel to be powered on those boards. > > On boards that do not describe vddp-supply, the regulator core provides > a dummy regulator, so they only see a "using dummy regulator" message. > > Signed-off-by: David Lechner > --- > drivers/gpu/drm/panel/panel-himax-hx8279.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/panel/panel-himax-hx8279.c b/drivers/gpu/drm/panel/panel-himax-hx8279.c > index 9e443c719843..fe665cd3a3d2 100644 > --- a/drivers/gpu/drm/panel/panel-himax-hx8279.c > +++ b/drivers/gpu/drm/panel/panel-himax-hx8279.c > @@ -112,7 +112,7 @@ > struct hx8279 { > struct drm_panel panel; > struct mipi_dsi_device *dsi[2]; > - struct regulator_bulk_data vregs[2]; > + struct regulator_bulk_data vregs[3]; > struct gpio_desc *enable_gpio; > struct gpio_desc *reset_gpio; > const struct hx8279_panel_desc *desc; > @@ -769,6 +769,7 @@ static int hx8279_init_vregs(struct hx8279 *hx, struct device *dev) > > hx->vregs[0].supply = "vdd"; > hx->vregs[1].supply = "iovcc"; > + hx->vregs[2].supply = "vddp"; > ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hx->vregs), > hx->vregs); > if (ret < 0) > Reviewed-by: Neil Armstrong Thanks, Neil