[PATCH v4 04/12] video: rockchip: dw-mipi-dsi: Add get_display_timing support

[Dang Huynh]

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

Reviewed-by: Svyatoslav Ryhel <clamo...@gmail.com>
Signed-off-by: Dang Huynh <danc...@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