From: Nicholas Susanto nicholas.susanto@amd.com
[ Upstream commit 3aec7a5af4d6248b7462b7d1eb597f06d35f5ee0 ]
[Why]
Missing check for when there is new pipe configuration but both cur_pipe and new_pipe are both populated causing update_state of DSC for that instance not being updated correctly.
This causes some display mode changes to cause underflow since DSCCLK is still gated when the display requires DSC.
[How]
Added another condition in the new pipe addition branch that checks if there is a new pipe configuration and if it is not the same as cur_pipe. cur_pipe does not necessarily have to be NULL to go in this branch.
Reviewed-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com Acked-by: Roman Li roman.li@amd.com Signed-off-by: Nicholas Susanto nicholas.susanto@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c index 5f60da72c6f58..68ac4dee79f79 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c @@ -1095,7 +1095,8 @@ void dcn35_calc_blocks_to_ungate(struct dc *dc, struct dc_state *context, continue;
if ((!cur_pipe->plane_state && new_pipe->plane_state) || - (!cur_pipe->stream && new_pipe->stream)) { + (!cur_pipe->stream && new_pipe->stream) || + (cur_pipe->stream != new_pipe->stream && new_pipe->stream)) { // New pipe addition for (j = 0; j < PG_HW_PIPE_RESOURCES_NUM_ELEMENT; j++) { if (j == PG_HUBP && new_pipe->plane_res.hubp)