drm/amd/display: Keep VBios pixel rate div setting until next mode set

[why]
Vbios & Driver have difference pixel rate div policy.
When enabling fast boot & performing blank & unblank w/o timing setting,
pixel clock & pixel rate dividor are not match.
It would cause too high pixel reate and eDP would be black screen.

[How]
We would keep pixel rate div setting by Vbios until next timing setting.

Reviewed-by: Jun Lei <jun.lei@amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Signed-off-by: yi-lchen <yi-lchen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
index a9f2b7ee9dd8..e9b85884edce 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
+++ b/drivers/gpu/drm/amd/display/dc/hwss/hw_sequencer.h
@@ -339,6 +339,9 @@ struct hw_sequencer_funcs {
 			struct dc_state *context);
 	void (*exit_optimized_pwr_state)(const struct dc *dc,
 			struct dc_state *context);
+	void (*calculate_pix_rate_divider)(struct dc *dc,
+			struct dc_state *context,
+			const struct dc_stream_state *stream);
 
 	/* Audio Related */
 	void (*enable_audio_stream)(struct pipe_ctx *pipe_ctx);