From 73d450926432c7cb48f668b774629b596afe6084 Mon Sep 17 00:00:00 2001 From: Wenjing Liu Date: Tue, 1 Aug 2023 13:04:22 -0400 Subject: drm/amd/display: fix incorrect stream_res allocation for older ASIC [why] There is a recent work for developing a new pipe resource allocation policy used for new ASIC. The new code change needs to modify asic independent pipe resource allocation flow and hook up the new allocation policy in asic dependent layer. Unfortunately this change revealed a hidden bug in the old pipe resource allocation sequence used for older asics. In the older version of acquiring pipe for layer, we are always assigning otg master's opp and tg to the newly allocated secondary dpp pipe. This logic is incorrect when the secodnary dpp pipe is connected to a secondary opp head pipe in ODM combine configuration. Before the recent change, we will overwrite this wrong assignement in asic independent layer again. This covers up the issue. With the recent change, we will no longer cover up this in upper layer and therefore causes wrong tg and opp assignement to the secondary dpp pipe connected to a secondary opp head. [how] Always assign tg and opp from its own opp head instead of otg master. Reviewed-by: Martin Leung Acked-by: Stylon Wang Signed-off-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- .../gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 27 +++++++++++----------- 1 file changed, 13 insertions(+), 14 deletions(-) (limited to 'drivers/gpu/drm/amd/display/dc/dcn20') 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 dfecb9602f49..efa600e46194 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -2151,28 +2151,27 @@ struct pipe_ctx *dcn20_acquire_free_pipe_for_layer( const struct dc_state *cur_ctx, struct dc_state *new_ctx, const struct resource_pool *pool, - const struct pipe_ctx *opp_head_pipe) + const struct pipe_ctx *opp_head) { struct resource_context *res_ctx = &new_ctx->res_ctx; - struct pipe_ctx *head_pipe = resource_get_head_pipe_for_stream(res_ctx, opp_head_pipe->stream); - struct pipe_ctx *idle_pipe = find_free_secondary_pipe_legacy(res_ctx, pool, head_pipe); + struct pipe_ctx *otg_master = resource_get_head_pipe_for_stream(res_ctx, opp_head->stream); + struct pipe_ctx *sec_dpp_pipe = find_free_secondary_pipe_legacy(res_ctx, pool, otg_master); - if (!head_pipe) - ASSERT(0); + ASSERT(otg_master); - if (!idle_pipe) + if (!sec_dpp_pipe) return NULL; - idle_pipe->stream = head_pipe->stream; - idle_pipe->stream_res.tg = head_pipe->stream_res.tg; - idle_pipe->stream_res.opp = head_pipe->stream_res.opp; + sec_dpp_pipe->stream = opp_head->stream; + sec_dpp_pipe->stream_res.tg = opp_head->stream_res.tg; + sec_dpp_pipe->stream_res.opp = opp_head->stream_res.opp; - idle_pipe->plane_res.hubp = pool->hubps[idle_pipe->pipe_idx]; - idle_pipe->plane_res.ipp = pool->ipps[idle_pipe->pipe_idx]; - idle_pipe->plane_res.dpp = pool->dpps[idle_pipe->pipe_idx]; - idle_pipe->plane_res.mpcc_inst = pool->dpps[idle_pipe->pipe_idx]->inst; + sec_dpp_pipe->plane_res.hubp = pool->hubps[sec_dpp_pipe->pipe_idx]; + sec_dpp_pipe->plane_res.ipp = pool->ipps[sec_dpp_pipe->pipe_idx]; + sec_dpp_pipe->plane_res.dpp = pool->dpps[sec_dpp_pipe->pipe_idx]; + sec_dpp_pipe->plane_res.mpcc_inst = pool->dpps[sec_dpp_pipe->pipe_idx]->inst; - return idle_pipe; + return sec_dpp_pipe; } bool dcn20_get_dcc_compression_cap(const struct dc *dc, -- cgit