From: Fatemeh Darbehani Date: Fri, 21 Jun 2019 21:44:50 +0000 (-0400) Subject: drm/amd/display: Change min_h_sync_width from 8 to 4 X-Git-Tag: v5.4-rc1~106^2~17^2~266 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7e6472966e8341bf72f558babfdafac8aeff3257;p=linux.git drm/amd/display: Change min_h_sync_width from 8 to 4 [Why] Some display's hsync width is lower than the minimum dcn20 is set to support right now. This will cause optc1_validate_timing to fail which eventually will result in wrong set mode. This was set to 8 as per HW team's request for no valid reason. [How] Changing min_h_sync_width to 4 will let us validate timing for preffered mode and light up the headset. This change was made to Vega 10 before for a similar issue. Signed-off-by: Fatemeh Darbehani Reviewed-by: Joshua Aberback Acked-by: Aric Cyr Acked-by: Leo Li Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c index 26a66ccf6e72..1ae973962d53 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_optc.c @@ -535,7 +535,7 @@ void dcn20_timing_generator_init(struct optc *optc1) optc1->min_h_blank = 32; optc1->min_v_blank = 3; optc1->min_v_blank_interlace = 5; - optc1->min_h_sync_width = 8; + optc1->min_h_sync_width = 4;// Minimum HSYNC = 8 pixels asked By HW in the first place for no actual reason. Oculus Rift S will not light up with 8 as it's hsyncWidth is 6. Changing it to 4 to fix that issue. optc1->min_v_sync_width = 1; optc1->comb_opp_id = 0xf; }