diff options
| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2023-03-13 13:23:45 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-03-31 11:18:54 -0400 |
| commit | bf224e00a9f54e2bf14b4d720a09c3d2f4aa4aa8 (patch) | |
| tree | 7344000ede75e16529e848f5a123717e0e65b7b6 /drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | |
| parent | 1991481828a84dcc5168f1e9b818311cbde86876 (diff) | |
| download | linux-bf224e00a9f54e2bf14b4d720a09c3d2f4aa4aa8.tar.gz linux-bf224e00a9f54e2bf14b4d720a09c3d2f4aa4aa8.tar.bz2 linux-bf224e00a9f54e2bf14b4d720a09c3d2f4aa4aa8.zip | |
drm/amd/display: Fix 4to1 MPC black screen with DPP RCO
[Why]
DPP Root clock optimization when combined with 4to1 MPC combine results
in the screen turning black.
This is because the DPPCLK is stopped during the middle of an
optimize_bandwidth sequence during commit_minimal_transition without
going through plane power down/power up.
[How]
The intent of a 0Hz DPP clock through update_clocks is to disable the
DTO. This differs from the behavior of stopping the DPPCLK entirely
(utilizing a 0Hz clock on some ASIC) so it's better to move this logic
to reside next to plane power up/power down where we gate the HUBP/DPP
DOMAIN.
The new sequence should be:
Power down: PG enabled -> RCO on
Power up: RCO off -> PG disabled
Rename power_on_plane to power_on_plane_resources to reflect the
actual operation that's occurring.
Cc: stable@vger.kernel.org
Cc: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index 69ea1f4ea749..9ca162ea0d07 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -1130,11 +1130,15 @@ void dcn20_blank_pixel_data( } -static void dcn20_power_on_plane( +static void dcn20_power_on_plane_resources( struct dce_hwseq *hws, struct pipe_ctx *pipe_ctx) { DC_LOGGER_INIT(hws->ctx->logger); + + if (hws->funcs.dpp_root_clock_control) + hws->funcs.dpp_root_clock_control(hws, pipe_ctx->plane_res.dpp->inst, true); + if (REG(DC_IP_REQUEST_CNTL)) { REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 1); @@ -1158,7 +1162,7 @@ static void dcn20_enable_plane(struct dc *dc, struct pipe_ctx *pipe_ctx, //if (dc->debug.sanity_checks) { // dcn10_verify_allow_pstate_change_high(dc); //} - dcn20_power_on_plane(dc->hwseq, pipe_ctx); + dcn20_power_on_plane_resources(dc->hwseq, pipe_ctx); /* enable DCFCLK current DCHUB */ pipe_ctx->plane_res.hubp->funcs->hubp_clk_cntl(pipe_ctx->plane_res.hubp, true); |