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drm/i915: Set preferred mode for integrated TV according to TV format

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In order to get best possible quality image we chose 640x480 for
NTSC, PAL and 480p, 1280x720 for 720p, 1920x1080 for 1080i/p
TV format respectively.

Signed-off-by: Ma Ling <ling.ma@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
ling.ma@intel.com 2009-07-20 13:20:23 +08:00 committed by Eric Anholt
parent f360132626
commit bcae2ca81c
1 changed files with 22 additions and 0 deletions
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22
drivers/gpu/drm/i915/intel_tv.c
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@ -1490,6 +1490,27 @@ static struct input_res {
{"1920x1080", 1920, 1080},
};
/*
* Chose preferred mode according to line number of TV format
*/
static void
intel_tv_chose_preferred_modes(struct drm_connector *connector,
struct drm_display_mode *mode_ptr)
{
struct intel_output *intel_output = to_intel_output(connector);
const struct tv_mode *tv_mode = intel_tv_mode_find(intel_output);
if (tv_mode->nbr_end < 480 && mode_ptr->vdisplay == 480)
mode_ptr->type |= DRM_MODE_TYPE_PREFERRED;
else if (tv_mode->nbr_end > 480) {
if (tv_mode->progressive == true && tv_mode->nbr_end < 720) {
if (mode_ptr->vdisplay == 720)
mode_ptr->type |= DRM_MODE_TYPE_PREFERRED;
} else if (mode_ptr->vdisplay == 1080)
mode_ptr->type |= DRM_MODE_TYPE_PREFERRED;
}
}
/**
* Stub get_modes function.
*
@ -1544,6 +1565,7 @@ intel_tv_get_modes(struct drm_connector *connector)
mode_ptr->clock = (int) tmp;
mode_ptr->type = DRM_MODE_TYPE_DRIVER;
intel_tv_chose_preferred_modes(connector, mode_ptr);
drm_mode_probed_add(connector, mode_ptr);
count++;
}