[PATCH v4 05/10] drm/bridge: dw-hdmi-qp: Set bridge supported_formats

From: Nicolas Frattaroli

Date: Mon Nov 17 2025 - 14:15:21 EST


The drm_bridge "supported_formats" member stores a bitmask of supported
HDMI output formats if the bridge is in fact an HDMI bridge.

However, until now, the synopsys dw-hdmi-qp driver did not set this
member in the bridge it creates.

Set it based on the platform data's supported_formats member, and
default to BIT(HDMI_COLORSPACE_RGB) if it's absent, which preserves the
previous behaviour.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@xxxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
index fe4c026280f0..cf888236bd65 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
@@ -1269,6 +1269,11 @@ struct dw_hdmi_qp *dw_hdmi_qp_bind(struct platform_device *pdev,
dev_warn(dev, "Set ref_clk_rate to vendor default\n");
}

+ if (plat_data->supported_formats)
+ hdmi->bridge.supported_formats = plat_data->supported_formats;
+ else
+ hdmi->bridge.supported_formats = BIT(HDMI_COLORSPACE_RGB);
+
dw_hdmi_qp_init_hw(hdmi);

ret = devm_request_threaded_irq(dev, plat_data->main_irq,

--
2.51.2