diff options
| author | Qingqing Zhuo <qingqing.zhuo@amd.com> | 2020-07-30 15:35:41 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-29 10:08:29 +0100 |
| commit | b6dead6f20e9f66dd7e5e0a4c9f4b7322698fde8 (patch) | |
| tree | 14a3b7f46598753175aa1dc3d4598fdd0f139515 | |
| parent | 0666c173a061cd9a34596112b2ff8c865bc2dbe8 (diff) | |
drm/amd/display: Screen corruption on dual displays (DP+USB-C)
[ Upstream commit ce271b40a91f781af3dee985c39e841ac5148766 ]
[why]
Current pipe merge and split logic only supports cases where new
dc_state is allocated and relies on dc->current_state to gather
information from previous dc_state.
Calls to validate_bandwidth on UPDATE_TYPE_MED would cause an issue
because there is no new dc_state allocated, and data in
dc->current_state would be overwritten during pipe merge.
[how]
Only allow validate_bandwidth when new dc_state space is created.
Signed-off-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 3 |
3 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index d016f50e187c..d261f425b80e 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -2538,7 +2538,7 @@ void dc_commit_updates_for_stream(struct dc *dc, copy_stream_update_to_stream(dc, context, stream, stream_update); - if (update_type > UPDATE_TYPE_FAST) { + if (update_type >= UPDATE_TYPE_FULL) { if (!dc->res_pool->funcs->validate_bandwidth(dc, context, false)) { DC_ERROR("Mode validation failed for stream update!\n"); dc_release_state(context); diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c index 20bdabebbc43..76cd4f3de4ea 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -3165,6 +3165,9 @@ static noinline bool dcn20_validate_bandwidth_fp(struct dc *dc, context->bw_ctx.dml.soc.allow_dram_clock_one_display_vactive = dc->debug.enable_dram_clock_change_one_display_vactive; + /*Unsafe due to current pipe merge and split logic*/ + ASSERT(context != dc->current_state); + if (fast_validate) { return dcn20_validate_bandwidth_internal(dc, context, true); } diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c index f00a56835084..c6ab3dee4fd6 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c @@ -1184,6 +1184,9 @@ bool dcn21_validate_bandwidth(struct dc *dc, struct dc_state *context, BW_VAL_TRACE_COUNT(); + /*Unsafe due to current pipe merge and split logic*/ + ASSERT(context != dc->current_state); + out = dcn20_fast_validate_bw(dc, context, pipes, &pipe_cnt, pipe_split_from, &vlevel); if (pipe_cnt == 0) |