From: Nikola Cornij Date: Thu, 28 Nov 2019 19:14:56 +0000 (-0500) Subject: drm/amd/display: Minimize DSC resource re-assignment X-Git-Tag: baikal/mips/sdk5.9~13559^2^2~24 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=8d9b0b1a9b7ad49ab256b42064c25e7dc0186a99;p=kernel.git drm/amd/display: Minimize DSC resource re-assignment [why] Assigning a different DSC resource than the one previosly used is currently not handled. This causes black screen on mode change when more than one monitor is connected on some ASICs. [how] - Acquire the previously used DSC if available - Make sure re-program is triggered if new DSC is used Acked-by: Rodrigo Siqueira Signed-off-by: Nikola Cornij Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c index cb5d11f11cad5..bbef8c67d1dbe 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -2666,6 +2666,9 @@ bool pipe_need_reprogram( false == pipe_ctx_old->stream->dpms_off) return true; + if (pipe_ctx_old->stream_res.dsc != pipe_ctx->stream_res.dsc) + return true; + return false; } 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 778e2e8fd2c6b..4912160f81b3a 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -1663,22 +1663,32 @@ enum dc_status dcn20_build_mapped_resource(const struct dc *dc, struct dc_state } -static void acquire_dsc(struct resource_context *res_ctx, - const struct resource_pool *pool, +static void acquire_dsc(const struct dc *dc, + struct resource_context *res_ctx, struct display_stream_compressor **dsc, int pipe_idx) { int i; + const struct resource_pool *pool = dc->res_pool; + struct display_stream_compressor *dsc_old = dc->current_state->res_ctx.pipe_ctx[pipe_idx].stream_res.dsc; - ASSERT(*dsc == NULL); + ASSERT(*dsc == NULL); /* If this ASSERT fails, dsc was not released properly */ *dsc = NULL; + /* Always do 1-to-1 mapping when number of DSCs is same as number of pipes */ if (pool->res_cap->num_dsc == pool->res_cap->num_opp) { *dsc = pool->dscs[pipe_idx]; res_ctx->is_dsc_acquired[pipe_idx] = true; return; } + /* Return old DSC to avoid the need for re-programming */ + if (dsc_old && !res_ctx->is_dsc_acquired[dsc_old->inst]) { + *dsc = dsc_old; + res_ctx->is_dsc_acquired[dsc_old->inst] = true; + return ; + } + /* Find first free DSC */ for (i = 0; i < pool->res_cap->num_dsc; i++) if (!res_ctx->is_dsc_acquired[i]) { @@ -1710,7 +1720,6 @@ enum dc_status dcn20_add_dsc_to_stream_resource(struct dc *dc, { enum dc_status result = DC_OK; int i; - const struct resource_pool *pool = dc->res_pool; /* Get a DSC if required and available */ for (i = 0; i < dc->res_pool->pipe_count; i++) { @@ -1722,7 +1731,7 @@ enum dc_status dcn20_add_dsc_to_stream_resource(struct dc *dc, if (pipe_ctx->stream_res.dsc) continue; - acquire_dsc(&dc_ctx->res_ctx, pool, &pipe_ctx->stream_res.dsc, i); + acquire_dsc(dc, &dc_ctx->res_ctx, &pipe_ctx->stream_res.dsc, i); /* The number of DSCs can be less than the number of pipes */ if (!pipe_ctx->stream_res.dsc) { @@ -1850,12 +1859,13 @@ static void swizzle_to_dml_params( } bool dcn20_split_stream_for_odm( + const struct dc *dc, struct resource_context *res_ctx, - const struct resource_pool *pool, struct pipe_ctx *prev_odm_pipe, struct pipe_ctx *next_odm_pipe) { int pipe_idx = next_odm_pipe->pipe_idx; + const struct resource_pool *pool = dc->res_pool; *next_odm_pipe = *prev_odm_pipe; @@ -1913,7 +1923,7 @@ bool dcn20_split_stream_for_odm( } next_odm_pipe->stream_res.opp = pool->opps[next_odm_pipe->pipe_idx]; if (next_odm_pipe->stream->timing.flags.DSC == 1) { - acquire_dsc(res_ctx, pool, &next_odm_pipe->stream_res.dsc, next_odm_pipe->pipe_idx); + acquire_dsc(dc, res_ctx, &next_odm_pipe->stream_res.dsc, next_odm_pipe->pipe_idx); ASSERT(next_odm_pipe->stream_res.dsc); if (next_odm_pipe->stream_res.dsc == NULL) return false; @@ -2792,7 +2802,7 @@ bool dcn20_fast_validate_bw( hsplit_pipe = dcn20_find_secondary_pipe(dc, &context->res_ctx, dc->res_pool, pipe); ASSERT(hsplit_pipe); if (!dcn20_split_stream_for_odm( - &context->res_ctx, dc->res_pool, + dc, &context->res_ctx, pipe, hsplit_pipe)) goto validate_fail; pipe_split_from[hsplit_pipe->pipe_idx] = pipe_idx; @@ -2821,7 +2831,7 @@ bool dcn20_fast_validate_bw( } if (context->bw_ctx.dml.vba.ODMCombineEnabled[pipe_idx]) { if (!dcn20_split_stream_for_odm( - &context->res_ctx, dc->res_pool, + dc, &context->res_ctx, pipe, hsplit_pipe)) goto validate_fail; dcn20_build_mapped_resource(dc, context, pipe->stream); diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h index d5448c9b0e15e..ed5d31253314a 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h @@ -136,8 +136,8 @@ void dcn20_split_stream_for_mpc( struct pipe_ctx *primary_pipe, struct pipe_ctx *secondary_pipe); bool dcn20_split_stream_for_odm( + const struct dc *dc, struct resource_context *res_ctx, - const struct resource_pool *pool, struct pipe_ctx *prev_odm_pipe, struct pipe_ctx *next_odm_pipe); struct pipe_ctx *dcn20_find_secondary_pipe(struct dc *dc,