According to EDID spec, table 3.26, byte #6 and #8, which said "Minimum rate value shall be less than or equal to maximum rate value". The minimum horizontal/vertical rate value is able to be equal to maximum horizontal/ veritcal rate value. This change check if h/v-sync excess maximum horizontal/vertical rate if hmin equal to hmax or vmin equal to vmax. Signed-off-by: Cyrus Lien <cyrus.lien@xxxxxxxxxxxxx> --- drivers/gpu/drm/drm_edid.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index fed653f13c26..23878320eabd 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2674,6 +2674,9 @@ mode_in_hsync_range(const struct drm_display_mode *mode, hmax += ((t[4] & 0x08) ? 255 : 0); hsync = drm_mode_hsync(mode); + if (hmax == hmin) + return (hsync <= hmax); + return (hsync <= hmax && hsync >= hmin); } @@ -2691,6 +2694,9 @@ mode_in_vsync_range(const struct drm_display_mode *mode, vmax += ((t[4] & 0x02) ? 255 : 0); vsync = drm_mode_vrefresh(mode); + if (vmax == vmin) + return (vsync <= vmax); + return (vsync <= vmax && vsync >= vmin); } -- 2.25.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
