linux-kernel - [PATCH v2 1/3] drm/panel: nt36672a: add backlight support

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Date:   Fri,  1 Apr 2022 05:48:08 +0530
From:   Joel Selvaraj <jo@...amily.in>
To:     Sumit Semwal <sumit.semwal@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Amit Pundir <amit.pundir@...aro.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Joel Selvaraj <jo@...amily.in>
Subject: [PATCH v2 1/3] drm/panel: nt36672a: add backlight support

Add support for backlight. This panel supports backlight control
through the QCOM WLED driver in Xiaomi Poco F1 device.

Signed-off-by: Joel Selvaraj <jo@...amily.in>
---
 drivers/gpu/drm/panel/panel-novatek-nt36672a.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
index 231f371901e8..6d6ce42787e2 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c
@@ -628,6 +628,10 @@ static int nt36672a_panel_add(struct nt36672a_panel *pinfo)
 
 	drm_panel_init(&pinfo->base, dev, &panel_funcs, DRM_MODE_CONNECTOR_DSI);
 
+	ret = drm_panel_of_backlight(&pinfo->base);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get backlight\n");
+
 	drm_panel_add(&pinfo->base);
 
 	return 0;
-- 
2.35.1