From: Ausef Yousof Ausef.Yousof@amd.com

[why&how] seeing display corruption as a result of not waiting for certain values to latch and attempting otg locking/programming before waiting for them, there is code in place for this but dcn35 does not initialize these functions.

Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Reviewed-by: Alvin Lee alvin.lee2@amd.com Signed-off-by: Ausef Yousof Ausef.Yousof@amd.com Signed-off-by: Wayne Lin wayne.lin@amd.com --- drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_init.c | 1 + drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c | 3 +++ 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_init.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_init.c index 6a82a865209c..7be72fd88477 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_init.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_init.c @@ -128,6 +128,7 @@ static const struct hw_sequencer_funcs dcn35_funcs = { .enable_plane = dcn20_enable_plane, .update_dchubp_dpp = dcn20_update_dchubp_dpp, .post_unlock_reset_opp = dcn20_post_unlock_reset_opp, + .wait_for_all_pending_updates = dcn30_wait_for_all_pending_updates };

static const struct hwseq_private_funcs dcn35_private_funcs = { diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c index b86fe2b094f8..eb29e852dedb 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c @@ -493,6 +493,9 @@ static struct timing_generator_funcs dcn35_tg_funcs = { .set_long_vtotal = optc35_set_long_vtotal, .is_two_pixels_per_container = optc1_is_two_pixels_per_container, .read_otg_state = optc31_read_otg_state, + .get_optc_double_buffer_pending = optc3_get_optc_double_buffer_pending, + .get_pipe_update_pending = optc3_get_pipe_update_pending, + .get_otg_double_buffer_pending = optc3_get_otg_update_pending, };

void dcn35_timing_generator_init(struct optc *optc1)