From 3addbde269f21ffc735f6d3d0c2237664923824e Mon Sep 17 00:00:00 2001 From: Jake Wang Date: Wed, 30 Jun 2021 13:55:50 -0400 Subject: [PATCH] drm/amd/display: Fixed hardware power down bypass during headless boot [Why] During headless boot, DIG may be on which causes HW/SW discrepancies. To avoid this we power down hardware on boot if DIG is turned on. With introduction of multiple eDP, hardware power down is being bypassed under certain conditions. [How] Fixed hardware power down bypass, and ensured hardware will power down if DIG is on and seamless boot is not enabled. Reviewed-by: Nicholas Kazlauskas Acked-by: Rodrigo Siqueira Signed-off-by: Jake Wang Signed-off-by: Alex Deucher --- .../drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 27 ++++++++++------------ drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c | 25 +++++++++----------- drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c | 5 +++- 3 files changed, 27 insertions(+), 30 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index f0f234ee5827..89e68372992f 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -1502,25 +1502,22 @@ void dcn10_init_hw(struct dc *dc) void dcn10_power_down_on_boot(struct dc *dc) { struct dc_link *edp_links[MAX_NUM_EDP]; - struct dc_link *edp_link; + struct dc_link *edp_link = NULL; int edp_num; int i = 0; get_edp_links(dc, edp_links, &edp_num); - - if (edp_num) { - for (i = 0; i < edp_num; i++) { - edp_link = edp_links[i]; - if (edp_link->link_enc->funcs->is_dig_enabled && - edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) && - dc->hwseq->funcs.edp_backlight_control && - dc->hwss.power_down && - dc->hwss.edp_power_control) { - dc->hwseq->funcs.edp_backlight_control(edp_link, false); - dc->hwss.power_down(dc); - dc->hwss.edp_power_control(edp_link, false); - } - } + if (edp_num) + edp_link = edp_links[0]; + + if (edp_link && edp_link->link_enc->funcs->is_dig_enabled && + edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) && + dc->hwseq->funcs.edp_backlight_control && + dc->hwss.power_down && + dc->hwss.edp_power_control) { + dc->hwseq->funcs.edp_backlight_control(edp_link, false); + dc->hwss.power_down(dc); + dc->hwss.edp_power_control(edp_link, false); } else { for (i = 0; i < dc->link_count; i++) { struct dc_link *link = dc->links[i]; diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c index c68e3a708a33..2e8ab9775fa3 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c @@ -580,22 +580,19 @@ void dcn30_init_hw(struct dc *dc) */ if (dc->config.power_down_display_on_boot) { struct dc_link *edp_links[MAX_NUM_EDP]; - struct dc_link *edp_link; + struct dc_link *edp_link = NULL; get_edp_links(dc, edp_links, &edp_num); - if (edp_num) { - for (i = 0; i < edp_num; i++) { - edp_link = edp_links[i]; - if (edp_link->link_enc->funcs->is_dig_enabled && - edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) && - dc->hwss.edp_backlight_control && - dc->hwss.power_down && - dc->hwss.edp_power_control) { - dc->hwss.edp_backlight_control(edp_link, false); - dc->hwss.power_down(dc); - dc->hwss.edp_power_control(edp_link, false); - } - } + if (edp_num) + edp_link = edp_links[0]; + if (edp_link && edp_link->link_enc->funcs->is_dig_enabled && + edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) && + dc->hwss.edp_backlight_control && + dc->hwss.power_down && + dc->hwss.edp_power_control) { + dc->hwss.edp_backlight_control(edp_link, false); + dc->hwss.power_down(dc); + dc->hwss.edp_power_control(edp_link, false); } else { for (i = 0; i < dc->link_count; i++) { struct dc_link *link = dc->links[i]; diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c index 6ac6faf0c533..83f7904630e6 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c @@ -226,6 +226,7 @@ void dcn31_init_hw(struct dc *dc) if (dc->config.power_down_display_on_boot) { struct dc_link *edp_links[MAX_NUM_EDP]; struct dc_link *edp_link; + bool power_down = false; get_edp_links(dc, edp_links, &edp_num); if (edp_num) { @@ -239,9 +240,11 @@ void dcn31_init_hw(struct dc *dc) dc->hwss.edp_backlight_control(edp_link, false); dc->hwss.power_down(dc); dc->hwss.edp_power_control(edp_link, false); + power_down = true; } } - } else { + } + if (!power_down) { for (i = 0; i < dc->link_count; i++) { struct dc_link *link = dc->links[i]; -- 2.11.0