On Tue, 2012-09-25 at 13:47 -0500, Ian Pilcher wrote:
In the meantime, I would like to move the ball forward on this issue. As I see it, there 3 issues that have become conflated:
- The display (LG L246WP) is confused by *any* InfoFrames.
If this is still the case after applying:
commit adf00b26d18e1b3570451296e03bcb20e4798cdd Author: Paulo Zanoni paulo.r.zanoni@intel.com Date: Tue Sep 25 13:23:34 2012 -0300
drm/i915: make sure we write all the DIP data bytes
Then I suspect I'm compelled to agree that we need a quirk to forcibly disable InfoFrames entirely. I don't like to be difficult about this, but the HDMI spec is quite clear that sinks _must_ accept InfoFrames defined in either the CEA or HDMI specs, so if we're seeing that class of failure I tend to strongly suspect our drivers first.
- drm_detect_monitor_audio is returning true for the LG L246WP, which definitely doesn't have any audio capabilities. This may be a bug in the display's EDID, or it may be a parsing error.
The display is definitely a filthy liar then:
Audio data block Linear PCM, max channels 1 Supported sample rates (kHz): 48 44.1 32 Supported sample sizes (bits): 24 20 16
Hooray for hardware. Not sure what the logic should be for whether to send HDMI audio or not, I'll re-read the appropriate scrolls.
- ajax