linux-kernel - [PATCH 07/12] drm/panel: Set sufficient voltage for panel nt37801

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Message-Id: <20251023080609.1212-2-yuanjie.yang@oss.qualcomm.com>
Date: Thu, 23 Oct 2025 16:06:04 +0800
From: yuanjie yang <yuanjie.yang@....qualcomm.com>
To: robin.clark@....qualcomm.com, lumag@...nel.org, abhinav.kumar@...ux.dev,
        sean@...rly.run, marijn.suijten@...ainline.org, airlied@...il.com,
        simona@...ll.ch, maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, quic_mkrishn@...cinc.com, jonathan@...ek.ca,
        quic_khsieh@...cinc.com, neil.armstrong@...aro.org
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, tingwei.zhang@....qualcomm.com,
        aiqun.yu@....qualcomm.com, yongxing.mou@....qualcomm.com
Subject: [PATCH 07/12] drm/panel: Set sufficient voltage for panel nt37801

From: Yuanjie Yang <yuanjie.yang@....qualcomm.com>

The NT37801 Sepc V1.0 chapter "5.7.1 Power On Sequence" states
VDDI=1.65V~1.95V, so set sufficient voltage for panel nt37801.

Signed-off-by: Yongxing Mou <yongxing.mou@....qualcomm.com>
Signed-off-by: Yuanjie Yang <yuanjie.yang@....qualcomm.com>
---
 drivers/gpu/drm/panel/panel-novatek-nt37801.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-novatek-nt37801.c b/drivers/gpu/drm/panel/panel-novatek-nt37801.c
index d6a37d7e0cc6..7eda16e0c1f9 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt37801.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt37801.c
@@ -267,6 +267,11 @@ static int novatek_nt37801_probe(struct mipi_dsi_device *dsi)
 	if (ret < 0)
 		return ret;
 
+	ret = regulator_set_voltage(ctx->supplies[0].consumer,
+				    1650000, 1950000);
+	if (ret < 0)
+		return ret;
+
 	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(ctx->reset_gpio))
 		return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
-- 
2.34.1