On Tue, Jun 09, 2020 at 03:57:04AM +0800, Cyrus Lien wrote:
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.
How does that justifiy ignoring the min 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@canonical.com
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
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