On 30.01.2017 10:42, Sharma, Shashank wrote: > Regards > > Shashank > > > On 1/30/2017 2:52 PM, Andrzej Hajda wrote: >> On 30.01.2017 09:45, Sharma, Shashank wrote: >>> Regards >>> >>> Shashank >>> >>> >>> On 1/30/2017 1:30 PM, Andrzej Hajda wrote: >>>> On 29.01.2017 06:41, Shashank Sharma wrote: >>>>> CEA-861-F specs defines new 4k video modes to be used with >>>>> HDMI 2.0 EDIDs. These modes start at VIC=93 and go all the >>>>> way till VIC=107. >>>>> >>>>> Our existing CEA modedb contains only 64 modes (VIC=1 to VIC=64). Now >>>>> to be able to parse 4k modes using the existing techniques, we have >>>>> to complete the modedb (VIC=65 onwards). >>>>> >>>>> This patch adds: >>>>> - Timings for existing CEA video modes (from VIC=65 till VIC=92) >>>>> - Newly added 4k modes (from VIC=93 to VIC=107). >>>>> >>>>> Cc: Jose Abreu <jose.ab...@synopsys.com> >>>>> Cc: Alex Deucher <alexander.deuc...@amd.com> >>>>> Cc: Andrzej Hajda <a.ha...@samsung.com> >>>>> >>>>> V2: Addressed review comments from Jose: >>>>> - fix the timings for VIC 83, 90 and 91 >>>>> - fix formatting for VIC 93-107 >>>>> >>>>> V3: Rebase on drm-tip >>>>> >>>>> Signed-off-by: Shashank Sharma <shashank.sha...@intel.com> >>>>> Signed-off-by: Sonika Jindal <sonika.jin...@intel.com> >>>>> Reviewed-by: Jose Abreu <jose.ab...@synopsys.com> >>>>> Reviewed-by: Alex Deucher <alexander.deuc...@amd.com> >>>>> --- >>>> Have you addressed in some other patch my concerns regarding polluting >>>> infoframes generated for HDMI 1.4 devices (CEA-861-E) with VICs specific >>>> only for HDMI 2.0 (CEA-861-F) ? It will happen >>>> for all UHD modes, see [1][2] for previous discussion. >>> Hello Andrzej >>> >>> As you already know, the aspect ratio is indexed with the VIC, which >>> comes from EDID. >>> Now, why would a HDMI 1.4 monitor, contain a HDMI 2.0 VIC ? If it does, >>> its not compliant. >> Have you forgot our previous discussion? Let me cite myself: >> >> For example 3840x2160@30Hz has no VIC in HDMI 1.4 but it can >> be present in HDMI vendor specific block with HDMI_VIC 1, on the >> other side it has VIC 95 in HDMI 2.0. So before your patch >> AVI infoframe.video_code is set to 0, after your patch is set to 95. >> >> >> And your discussion with Ville: >> >>>> />>> No. The user is free to specify any mode they wish. It doesn't >>> have to/ >>>> />>> come from the EDID. Not sure specifying a modern VIC for an older/ >>>> />>> display is a good idea or not. If not, we could always check the >>> cea_rev/ >>>> />>> assuming it changed whenever the list if VICs was expanded./ >>>> />> I agree, that user can specify a mode, out of EDID too./ >>>> />> I am anyways planning to add a patch, where before loading HDMI 2.0 >>> VICs/ >>>> />> in AVI IF, we are checking the EDID rev./ >>>> />> That should solve our problem./ >>>> />>/ >>>> />> So if edid_rev < 2.0/ >>>> />> do_not_load VICs from 93 - 107, but keep it 0./ >>>> /> Why edid_rev and not cea_rev?/ >>>> /We can do that also, but in the current structure, we are already / >>>> /caching EDID rev, its just about re-using it./ >>>> /AFAIK, we don't have CEA extension cached anywhere./ >>> Yes we do. >> It does not seem to be addressed. >> >> Regards >> Andrzej > Hey, thanks for bringing this out again. I checked the specs again, > there are three things here: > - The spec has a section on this, and it states that in such cases CEA > VIC should be supplied to the AVI IF.
This phrase is not precise, but if it means that in case of 3840x2160@30Hz source should set VIC to 95 also for HDMI1.4 compliant sinks it is in opposition to statement from HDMI1.4 specification: > When transmitting any extended video format indicated through use of > the HDMI_VIC field > in the HDMI Vendor Specific InfoFrame or any other format which is not > described in the > above cases, an HDMI Source shall set the AVI InfoFrame VIC field to zero. I do not think HDMI20 could invalidate claims from HDMI1.4. > - Also, for HDMI infoframe blocks, we dont refer to cea_edid_modes[] > rather we go to edid_4k_modes[] cea_edid_modes is used in generating AVI infoframe, edid_4k_modes is used in generating vendor infoframe > - Again, as there is no aspect ratio parsing layer in DRM right now > (after the revert), we are doing the right thing to give aspect as per > CEA, which is suggested by spec too. > I do not understand this phrase. Are you talking about aspect ratios or about video format? Regards Andrzej _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
