[PATCH v3 04/12] video: rockchip: dw-mipi-dsi: Add get_display_timing support

[Dang Huynh <danct12@riseup.net>]

This allows video drivers to obtain display timings from the video
bridge.

Reviewed-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Dang Huynh <danct12@riseup.net>
---
 drivers/video/rockchip/dw_mipi_dsi_rockchip.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/video/rockchip/dw_mipi_dsi_rockchip.c b/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
index 95e825eb3d6de7ef2836fa029927034394486e9c..d21ea7953a6003fa49da3e22220d3312109f600c 100644
--- a/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
+++ b/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
@@ -224,6 +224,7 @@ struct dw_rockchip_dsi_priv {
 	struct mipi_dsi_device device;
 	void __iomem *base;
 	struct udevice *panel;
+	struct display_timing timings;
 	void __iomem *grf;
 
 	/* Optional external dphy */
@@ -709,7 +710,7 @@ static int dw_mipi_dsi_rockchip_attach(struct udevice *dev)
 	struct dw_rockchip_dsi_priv *priv = dev_get_priv(dev);
 	struct mipi_dsi_device *device = &priv->device;
 	struct mipi_dsi_panel_plat *mplat;
-	struct display_timing timings;
+	struct display_timing *timings = &priv->timings;
 	int ret;
 
 	ret = uclass_first_device_err(UCLASS_PANEL, &priv->panel);
@@ -724,10 +725,10 @@ static int dw_mipi_dsi_rockchip_attach(struct udevice *dev)
 	device->format = mplat->format;
 	device->mode_flags = mplat->mode_flags;
 
-	ret = panel_get_display_timing(priv->panel, &timings);
+	ret = panel_get_display_timing(priv->panel, timings);
 	if (ret) {
 		ret = ofnode_decode_display_timing(dev_ofnode(priv->panel),
-						   0, &timings);
+						   0, timings);
 		if (ret) {
 			dev_err(dev, "decode display timing error %d\n", ret);
 			return ret;
@@ -740,7 +741,7 @@ static int dw_mipi_dsi_rockchip_attach(struct udevice *dev)
 		return ret;
 	}
 
-	ret = dsi_host_init(priv->dsi_host, device, &timings, 4,
+	ret = dsi_host_init(priv->dsi_host, device, timings, 4,
 			    &dsi_rockchip_phy_ops);
 	if (ret) {
 		dev_err(dev, "failed to initialize mipi dsi host\n");
@@ -902,9 +903,19 @@ static int dw_mipi_dsi_rockchip_probe(struct udevice *dev)
 	return 0;
 }
 
+static int dw_mipi_dsi_rockchip_get_dt(struct udevice *dev,
+				       struct display_timing *timings)
+{
+	struct dw_rockchip_dsi_priv *priv = dev_get_priv(dev);
+
+	memcpy(timings, &priv->timings, sizeof(*timings));
+	return 0;
+}
+
 struct video_bridge_ops dw_mipi_dsi_rockchip_ops = {
 	.attach = dw_mipi_dsi_rockchip_attach,
 	.set_backlight = dw_mipi_dsi_rockchip_set_bl,
+	.get_display_timing = dw_mipi_dsi_rockchip_get_dt,
 };
 
 static const struct rockchip_dw_dsi_chip_data rk3399_chip_data[] = {

-- 
2.49.0