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From:   Konrad Dybcio <konrad.dybcio@linaro.org>
Date:   Wed, 12 Apr 2023 21:46:01 +0200
Subject: [PATCH 4/5] drm/panel: nt36523: Get orientation from OF
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Message-Id: <20230412-topic-lenovopanel-v1-4-00b25df46824@linaro.org>
References: <20230412-topic-lenovopanel-v1-0-00b25df46824@linaro.org>
In-Reply-To: <20230412-topic-lenovopanel-v1-0-00b25df46824@linaro.org>
To:     Jianhua Lu <lujianhua000@gmail.com>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Sam Ravnborg <sam@ravnborg.org>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc:     Marijn Suijten <marijn.suijten@somainline.org>,
        dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Konrad Dybcio <konrad.dybcio@linaro.org>
Precedence: bulk

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

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.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 3c81ec014eef..db4b4af13ec1 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)
@@ -784,6 +793,12 @@ 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