Check the pixel clock for the mode in atomic_check and ensure that
it is within the range supported by the bridge.
Signed-off-by: Jayesh Choudhary <j-choudhary@xxxxxx>
---
drivers/gpu/drm/bridge/sii902x.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index bae551e107f9..a5b7ee1e3bbe 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -517,6 +517,12 @@ static int sii902x_bridge_atomic_check(struct drm_bridge *bridge,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
+ if (crtc_state->mode.clock < SII902X_MIN_PIXEL_CLOCK_KHZ)
+ return MODE_CLOCK_LOW;
+
+ if (crtc_state->mode.clock > SII902X_MAX_PIXEL_CLOCK_KHZ)
+ return MODE_CLOCK_HIGH;
+
/*
* There might be flags negotiation supported in future but
* set the bus flags in atomic_check statically for now.
--
2.25.1
