From: Mario Limonciello Date: Fri, 10 Dec 2021 15:45:23 +0000 (-0600) Subject: drm/amd: add some extra checks that is_dig_enabled is defined X-Git-Tag: v5.17-rc1~173^2~8^2~34 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4fe3819443a13f8ecf11f53559ada5711dd8d4b1;p=thirdparty%2Flinux.git drm/amd: add some extra checks that is_dig_enabled is defined There are a few places that this isn't checked that could potentially be a NULL pointer access. Signed-off-by: Mario Limonciello Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c index ac2d4c4f04e48..8653b4b8bcfc3 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c @@ -77,7 +77,8 @@ int rn_get_active_display_cnt_wa( const struct dc_link *link = dc->links[i]; /* abusing the fact that the dig and phy are coupled to see if the phy is enabled */ - if (link->link_enc->funcs->is_dig_enabled(link->link_enc)) + if (link->link_enc->funcs->is_dig_enabled && + link->link_enc->funcs->is_dig_enabled(link->link_enc)) display_count++; } diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index abef132fa0161..0d6dc329dddbd 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -1827,17 +1827,16 @@ void dce110_enable_accelerated_mode(struct dc *dc, struct dc_state *context) if (edp_link != edp_streams[0]->link) continue; // enable fastboot if backend is enabled on eDP - if (edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc)) { - /* Set optimization flag on eDP stream*/ - if (edp_link->link_status.link_active) { - edp_stream = edp_streams[0]; - can_apply_edp_fast_boot = !is_edp_ilr_optimization_required(edp_stream->link, &edp_stream->timing); - edp_stream->apply_edp_fast_boot_optimization = can_apply_edp_fast_boot; - if (can_apply_edp_fast_boot) - DC_LOG_EVENT_LINK_TRAINING("eDP fast boot disabled to optimize link rate\n"); - - break; - } + if (edp_link->link_enc->funcs->is_dig_enabled && + edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) && + edp_link->link_status.link_active) { + edp_stream = edp_streams[0]; + can_apply_edp_fast_boot = !is_edp_ilr_optimization_required(edp_stream->link, &edp_stream->timing); + edp_stream->apply_edp_fast_boot_optimization = can_apply_edp_fast_boot; + if (can_apply_edp_fast_boot) + DC_LOG_EVENT_LINK_TRAINING("eDP fast boot disabled to optimize link rate\n"); + + break; } } // We are trying to enable eDP, don't power down VDD