At Thu, 19 Apr 2012 14:03:58 +0200,
Takashi Iwai wrote:
>
> At Tue, 17 Apr 2012 17:26:26 +0200,
> Takashi Iwai wrote:
> >
> > At Fri, 13 Apr 2012 16:56:26 -0400,
> > Adam Jackson wrote:
> > >
> > > On 4/13/12 4:33 PM, Adam Jackson wrote:
> > > > Incorporates some feedback from Rodrigo and Takashi. Major themes of
> > > > the
> > > > series:
> > > >
> > > > - Fix the DMT list to include reduced-blanking modes
> > > > - Add modes from DMT for any range descriptor type
> > > > - Add an extra modes list for things not in DMT
> > > > - For ranges that specify a formula, generate timings from the extra
> > > > modes
> > > >
> > > > This still doesn't address the driver policy decision of "I know I have
> > > > a scaler, add modes as if there were a range descriptor even if there's
> > > > not one". But it should at least make clear what such a helper function
> > > > should do.
> > >
> > > One minor buglet in this series that's not obvious from inspection (and
> > > that I didn't realize until just now) is that putting 1366x768 in the
> > > minimode list won't do what you want, since the mode you get back will
> > > be 1368x768. Probably we should move the manual-underscan hack into the
> > > timing generators themselves.
> >
> > Sounds like a good compromise. We have already hacks in drm_edid.c
> > for HDMI TV, so one exception more isn't that bad ;)
>
> FYI, I tried the hack below and it seems working.
In addition, there are some missing NULL checks...
Takashi
---
---
drivers/gpu/drm/drm_edid.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -789,6 +789,8 @@ drm_mode_std(struct drm_connector *conne
* secondary GTF curve. Please don't do that.
*/
mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
+ if (!mode)
+ return NULL;
if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
kfree(mode);
mode = drm_gtf_mode_complex(dev, hsize, vsize,
@@ -1071,6 +1073,8 @@ drm_gtf_modes_for_range(struct drm_conne
for (i = 0; i < num_extra_modes; i++) {
const struct minimode *m = &extra_modes[i];
newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0);
+ if (!newmode)
+ return modes;
fixup_mode_1366x768(newmode);
if (!mode_in_range(newmode, edid, timing)) {
@@ -1097,6 +1101,8 @@ drm_cvt_modes_for_range(struct drm_conne
for (i = 0; i < num_extra_modes; i++) {
const struct minimode *m = &extra_modes[i];
newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0);
+ if (!newmode)
+ return modes;
fixup_mode_1366x768(newmode);
if (!mode_in_range(newmode, edid, timing)) {
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