[PATCH v3 2/9] drm/bridge: synopsis: Add mode_fixup and bridge timings support

[H. Nikolaus Schaller]

From: Paul Boddie <p...@boddie.org.uk>

The platform-specific configuration structure is augmented with
mode_fixup and timings members so that specialisations of the
Synopsys driver can introduce mode flags and bus flags.

Signed-off-by: Paul Boddie <p...@boddie.org.uk>
Signed-off-by: Ezequiel Garcia <ezequ...@collabora.com>
Signed-off-by: H. Nikolaus Schaller <h...@goldelico.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 7 +++++++
 include/drm/bridge/dw_hdmi.h              | 5 +++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c 
b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index e7c7c9b9c646f..d53bc557ef4ce 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2766,6 +2766,11 @@ static int dw_hdmi_bridge_atomic_check(struct drm_bridge 
*bridge,
                bridge_state->input_bus_cfg.format,
                bridge_state->output_bus_cfg.format);
 
+       if (hdmi->plat_data->mode_fixup)
+               if (!hdmi->plat_data->mode_fixup(bridge, &crtc_state->mode,
+                                                &crtc_state->adjusted_mode))
+                       return -EINVAL;
+
        return 0;
 }
 
@@ -3364,6 +3369,8 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device 
*pdev,
 #ifdef CONFIG_OF
        hdmi->bridge.of_node = pdev->dev.of_node;
 #endif
+       if (plat_data->timings)
+               hdmi->bridge.timings = plat_data->timings;
 
        memset(&pdevinfo, 0, sizeof(pdevinfo));
        pdevinfo.parent = dev;
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 6a5716655619b..677137445d534 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -8,6 +8,7 @@
 
 #include <sound/hdmi-codec.h>
 
+struct drm_bridge;
 struct drm_display_info;
 struct drm_display_mode;
 struct drm_encoder;
@@ -140,6 +141,10 @@ struct dw_hdmi_plat_data {
        enum drm_mode_status (*mode_valid)(struct dw_hdmi *hdmi, void *data,
                                           const struct drm_display_info *info,
                                           const struct drm_display_mode *mode);
+       bool (*mode_fixup)(struct drm_bridge *bridge,
+                          const struct drm_display_mode *mode,
+                          struct drm_display_mode *adjusted_mode);
+       const struct drm_bridge_timings *timings;
 
        /* Vendor PHY support */
        const struct dw_hdmi_phy_ops *phy_ops;
-- 
2.31.1