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drm: Blacklist 4096x2160 mode

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This mode is required for certaiin certifications but is effectively useless and doesn't fit the actual screen size of displays. (Gets scaled down)
This commit is contained in:
Joshua Ashton 2022-08-22 23:56:13 +00:00
parent 608de1c19e
commit c49cac3a00
1 changed files with 23 additions and 0 deletions
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23
src/drm.cpp
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@ -562,11 +562,34 @@ static bool get_resources(struct drm_t *drm)
return true;
}
struct mode_blocklist_entry
{
uint32_t width, height, refresh;
};
// Filter out reporting some modes that are required for
// certain certifications, but are completely useless,
// and probably don't fit the display pixel size.
static mode_blocklist_entry g_badModes[] =
{
{ 4096, 2160, 0 },
};
static const drmModeModeInfo *find_mode( const drmModeConnector *connector, int hdisplay, int vdisplay, uint32_t vrefresh )
{
for (int i = 0; i < connector->count_modes; i++) {
const drmModeModeInfo *mode = &connector->modes[i];
bool bad = false;
for (const auto& badMode : g_badModes) {
bad |= (badMode.width == 0 || mode->hdisplay == badMode.width)
&& (badMode.height == 0 || mode->vdisplay == badMode.height)
&& (badMode.refresh == 0 || mode->vrefresh == badMode.refresh);
}
if (bad)
continue;
if (hdisplay != 0 && hdisplay != mode->hdisplay)
continue;
if (vdisplay != 0 && vdisplay != mode->vdisplay)