Regards
Shashank
On 3/23/2017 5:52 PM, Jose Abreu wrote:
Hi Ville,
On 23-03-2017 15:36, Ville Syrjälä wrote:
On Thu, Mar 23, 2017 at 05:14:19PM +0200, Shashank Sharma wrote:
HDMI 1.4b support the CEA video modes as per range of CEA-861-D (VIC 1-64).
For any other mode, the VIC filed in AVI infoframes should be 0.
HDMI 2.0 sinks, support video modes range as per CEA-861-F spec, which is
extended to (VIC 1-107).
This patch adds a bool input variable, which indicates if the connected
sink is a HDMI 2.0 sink or not. This will make sure that we don't pass a
HDMI 2.0 VIC to a HDMI 1.4 sink.
The spec is unfortunately vague when it comes to the CEA-861-F VIC
transmission when there is a corresponding HDMI VIC for the same mode.
I'm not sure if it's telling us to set both or just one depending on
whether we're transmitting 3D video or not. Or at least I can't parse
that information from the spec. Anyone have a better crystal ball
in their possession?
I've been working in HDMI receivers and this is what I've got in
a comment:
1282
/*
1283 * Update current VIC: When transmitting any
extended video format
1284 * indicated through use of the HDMI_VIC field in
the HDMI Vendor
1285 * Specific InfoFrame or any other format which is
not described in
1286 * the above cases, an HDMI Source shall set the AVI
InfoFrame VIC
1287 * field to
zero.
1288 */
This was directly taken from the spec, can't remember exactly
were though.
So, the VIC in AVIIF must be set to 0 and the HDMI_VIC field in
VSIF shall be set to the HDMI 4k VIC.
Best regards,
Jose Miguel Abreu
Even my understanding of the two specs seems similar
If its a HDMI 1.4b monitor, 2D mode
- VIC field in AVI_IF should be set to appropriate VIC [if VIC is
not listed in CEA-861-D (VIC 1-64), make VIC=0]
If its a HDMI 1.4b monitor, 3D mode
- VIC field in AVI_IF should be set to appropriate VIC, in
conjunction with 3D_structure field in HDMI VSIF
If its a HDMI 2.0 monitor, 2D mode
- VIC filed in the AVI_IF should be set to appropriate VIC (1-107)
If its a HDMI 2.0 monitor, 3D mode
- VIC field in AVI_IF should be set to appropriate VIC, in
conjunction with 3D_structure field in HDMI VSIF
Regards
Shashank
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