On Thu, Aug 15, 2013 at 11:48 AM, Alex Deucher <alexdeucher@xxxxxxxxx> wrote:
> The vrefresh field of the mode is 0 for most modes
> fetched from the EDID (e.g., established timings).
> When dealing with monitors that have a bogus preferred
> mode, we may not always select the mode we want because
> we compare the target refresh to the mode's vrefresh which
> is 0 in a lot of cases.
>
> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Ping? Any objections?
Alex
> ---
> drivers/gpu/drm/drm_edid.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 58b4882..c3095e0 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -1278,7 +1278,7 @@ static u32 edid_get_quirks(struct edid *edid)
> }
>
> #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
> -#define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
> +#define MODE_REFRESH_DIFF(c,t) (abs((c) - (t)))
>
> /**
> * edid_fixup_preferred - set preferred modes based on quirk list
> @@ -1293,6 +1293,7 @@ static void edid_fixup_preferred(struct drm_connector *connector,
> {
> struct drm_display_mode *t, *cur_mode, *preferred_mode;
> int target_refresh = 0;
> + int cur_vrefresh, preferred_vrefresh;
>
> if (list_empty(&connector->probed_modes))
> return;
> @@ -1315,10 +1316,14 @@ static void edid_fixup_preferred(struct drm_connector *connector,
> if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
> preferred_mode = cur_mode;
>
> + cur_vrefresh = cur_mode->vrefresh ?
> + cur_mode->vrefresh : drm_mode_vrefresh(cur_mode);
> + preferred_vrefresh = preferred_mode->vrefresh ?
> + preferred_mode->vrefresh : drm_mode_vrefresh(preferred_mode);
> /* At a given size, try to get closest to target refresh */
> if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
> - MODE_REFRESH_DIFF(cur_mode, target_refresh) <
> - MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
> + MODE_REFRESH_DIFF(cur_vrefresh, target_refresh) <
> + MODE_REFRESH_DIFF(preferred_vrefresh, target_refresh)) {
> preferred_mode = cur_mode;
> }
> }
> --
> 1.8.3.1
>
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