linux-kernel - [PATCH v3 3/4] drm/panel: nt36523: Get orientation from OF

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Date:   Mon, 17 Apr 2023 16:39:05 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Jianhua Lu <lujianhua000@...il.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v3 3/4] drm/panel: nt36523: Get orientation from OF

Some bright vendors mount their display panels upside down. Add the
required pieces to allow for accounting for that.

Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Reviewed-by: Jianhua Lu <lujianhua000@...il.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 drivers/gpu/drm/panel/panel-novatek-nt36523.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36523.c b/drivers/gpu/drm/panel/panel-novatek-nt36523.c
index b0466abae812..2c5712ac3037 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt36523.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt36523.c
@@ -31,6 +31,7 @@ struct panel_info {
 	struct drm_panel panel;
 	struct mipi_dsi_device *dsi[2];
 	const struct panel_desc *desc;
+	enum drm_panel_orientation orientation;
 
 	struct gpio_desc *reset_gpio;
 	struct backlight_device *backlight;
@@ -674,11 +675,19 @@ static int nt36523_get_modes(struct drm_panel *panel,
 	return pinfo->desc->num_modes;
 }
 
+static enum drm_panel_orientation nt36523_get_orientation(struct drm_panel *panel)
+{
+	struct panel_info *pinfo = to_panel_info(panel);
+
+	return pinfo->orientation;
+}
+
 static const struct drm_panel_funcs nt36523_panel_funcs = {
 	.disable = nt36523_disable,
 	.prepare = nt36523_prepare,
 	.unprepare = nt36523_unprepare,
 	.get_modes = nt36523_get_modes,
+	.get_orientation = nt36523_get_orientation,
 };
 
 static int nt36523_bl_update_status(struct backlight_device *bl)
@@ -785,6 +794,12 @@ static int nt36523_probe(struct mipi_dsi_device *dsi)
 	mipi_dsi_set_drvdata(dsi, pinfo);
 	drm_panel_init(&pinfo->panel, dev, &nt36523_panel_funcs, DRM_MODE_CONNECTOR_DSI);
 
+	ret = of_drm_get_panel_orientation(dev->of_node, &pinfo->orientation);
+	if (ret < 0) {
+		dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);
+		return ret;
+	}
+
 	if (pinfo->desc->has_dcs_backlight) {
 		pinfo->panel.backlight = nt36523_create_backlight(dsi);
 		if (IS_ERR(pinfo->panel.backlight))

-- 
2.40.0