[Intel-gfx] HDMI 4k modes VIC
Sharma, Shashank
shashank.sharma at intel.com
Wed Oct 28 06:58:55 PDT 2015
Hi Damien
This is regarding one of the patches:
drm: Add support for alternate clocks of 4k modes
(3f2f653378112c1453c0d83c81746a9225e4bc75)
I am seeing that from function drm_match_hdmi_mode we are not returning correct VIC's for 4k modes (listed in edid_4k_modes[])
Looks like we are returning VIC=(1, 2, 3, 4) for 4K modes (3840x2160 at 30Hz, 3840x2160 at 25Hz, 3840x2160 at 24Hz and 4096x2160 at 24Hz)
But as per the CEA-861-F specs, the respective VIC should be (95, 94 and 93). The VIC returned is being used for writing AVI IF in
drm_hdmi_vendor_infoframe_from_display_mode.
Please help me to understand if there any specific reason for this, or am I missing something in interpretation ?
Regards
Shashank
More information about the Intel-gfx
mailing list