Re: [PATCH 1/1] drm/i915/display: Add quirk to force backlight type on some TUXEDO devices

[Werner Sembach]

Am 11.04.25 um 17:55 schrieb Werner Sembach:
<snip>
-       switch (display->params.enable_dpcd_backlight) {
+       enable_dpcd_backlight = display->params.enable_dpcd_backlight;
+       if (enable_dpcd_backlight == INTEL_DP_AUX_BACKLIGHT_AUTO &&
+           intel_has_quirk(display, 
QUIRK_AUO_12701_21229_ENABLE_DPCD_BACKLIGHT)) {
+               pnl_id = drm_edid_get_panel_id(panel->fixed_edid);
+               if (pnl_id == drm_edid_encode_panel_id('A', 'U', 'O', 0x319d) ||
+                   pnl_id == drm_edid_encode_panel_id('A', 'U', 'O', 0x52ed))

So I looked into this patch again to build a v2 and found "static const struct 
intel_dpcd_quirk intel_dpcd_quirks[]" in 
drivers/gpu/drm/i915/display/intel_quirks.c which sounds like it can select 
quirks based on panels, making this pnl_id check obsolete.

But I now wasted half a day trying to find out how I can get the SINK_OUI and 
SINK_DEVICE_ID out of a device.

Is there some way to read that from sysfs or debugfs?

<snip>