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drm/edid: Add DMT modes to the pool if the monitor is GTF-capable 

See also: http://bugzilla.redhat.com/539785

Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
hifive-unleashed-5.1
Adam Jackson 2009-12-03 17:44:38 -05:00 committed by Dave Airlie
parent 7ac96a9cb4
commit 07a5e6324a
1 changed files with 65 additions and 4 deletions
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69
drivers/gpu/drm/drm_edid.c
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@ -491,16 +491,17 @@ static struct drm_display_mode drm_dmt_modes[] = {
3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
};
static const int drm_num_dmt_modes =
sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh)
{
int i, count;
int i;
struct drm_display_mode *ptr, *mode;
count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
mode = NULL;
for (i = 0; i < count; i++) {
for (i = 0; i < drm_num_dmt_modes; i++) {
ptr = &drm_dmt_modes[i];
if (hsize == ptr->hdisplay &&
vsize == ptr->vdisplay &&
@ -838,6 +839,64 @@ static int add_standard_modes(struct drm_connector *connector, struct edid *edid
return modes;
}
/*
* XXX fix this for:
* - GTF secondary curve formula
* - EDID 1.4 range offsets
* - CVT extended bits
*/
static bool
mode_in_range(struct drm_display_mode *mode, struct detailed_timing *timing)
{
struct detailed_data_monitor_range *range;
int hsync, vrefresh;
range = &timing->data.other_data.data.range;
hsync = drm_mode_hsync(mode);
vrefresh = drm_mode_vrefresh(mode);
if (hsync < range->min_hfreq_khz || hsync > range->max_hfreq_khz)
return false;
if (vrefresh < range->min_vfreq || vrefresh > range->max_vfreq)
return false;
if (range->pixel_clock_mhz && range->pixel_clock_mhz != 0xff) {
/* be forgiving since it's in units of 10MHz */
int max_clock = range->pixel_clock_mhz * 10 + 9;
max_clock *= 1000;
if (mode->clock > max_clock)
return false;
}
return true;
}
/*
* XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
* need to account for them.
*/
static int drm_gtf_modes_for_range(struct drm_connector *connector,
struct detailed_timing *timing)
{
int i, modes = 0;
struct drm_display_mode *newmode;
struct drm_device *dev = connector->dev;
for (i = 0; i < drm_num_dmt_modes; i++) {
if (mode_in_range(drm_dmt_modes + i, timing)) {
newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
if (newmode) {
drm_mode_probed_add(connector, newmode);
modes++;
}
}
}
return modes;
}
static int add_detailed_modes(struct drm_connector *connector,
struct detailed_timing *timing,
struct edid *edid, u32 quirks, int preferred)
@ -845,6 +904,7 @@ static int add_detailed_modes(struct drm_connector *connector,
int i, modes = 0;
struct detailed_non_pixel *data = &timing->data.other_data;
int timing_level = standard_timing_level(edid);
int gtf = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
struct drm_display_mode *newmode;
struct drm_device *dev = connector->dev;
@ -863,7 +923,8 @@ static int add_detailed_modes(struct drm_connector *connector,
/* other timing types */
switch (data->type) {
case EDID_DETAIL_MONITOR_RANGE:
/* Get monitor range data */
if (gtf)
modes += drm_gtf_modes_for_range(connector, timing);
break;
case EDID_DETAIL_STD_MODES:
/* Six modes per detailed section */