2013/10/29 Anssi Hannula <anssi.hannula@xxxxxx>: > Because of this, only the 2-channel SAD may be used if it appears before > the 8-channel SAD. Unless other SADs require otherwise, this may cause > the ALSA HDA driver to allow stereo playback only. I can confirm that the problem exists. My SADs (Onkyo TX-SR605): Format: 1 (PCM) Channels:1 Freq:0x7F (32-192) B2:0x07 (16-24b) Format: 1 (PCM) Channels:7 Freq:0x7F (32-192) B2:0x07 (16-24b) Format: 2 (AC3) Channels:7 Freq:0x07 (32-48) B2:0x50 (640?) Format: 7 (DTS) Channels:7 Freq:0x06 (44-48) B2:0xC0 (1536?) Format: 10 (EAC3) Channels:7 Freq:0x06 (44-48) B2:0x00 Format: 11 (DTS_HD) Channels:7 Freq:0x7E (44-192) B2:0x01 Format: 12 (MLP) Channels:7 Freq:0x1E (44-96) B2:0x00 Unfortunately I get only 1 emulated SAD entry for PCM (/proc/asound/card1/eld#0.0): sad0_coding_type [0x1] LPCM sad0_channels 2 sad0_rates [0x1ee0] 32000 44100 48000 88200 96000 176400 192000 sad0_bits [0xe0000] 16 20 24 So I can not play 8 channel LPCM "legally" (without forcing player to do so). > Fix the code to pick the PCM SAD with the highest number of channels, > while merging the rate masks of PCM SADs with lower amount of channels > into the additional stereo rate mask byte. Does it mean that now instead of 2 real SADs: 1) 192kHz support for 2 channels 2) 96kHz support for 8 channels you will only get: 1) 192kHz support for 8 channels ? Does it mean alsa may try to play 8channels audio at 192kHz and fail at this? That doesn't sound good, but on the other hand I can't propose anything better :| Out of curiosity, what does fglrx set in the verbs? > Technically there are even more cases to handle (multiple non-PCM SADs > of the same type, more than two PCM SADs with varying channel counts, > etc), but those have not actually been encountered in the field and > handling them would be non-trivial. > > Example affected EDID from Onkyo TX-SR674 specifying 192kHz stereo > support and 96kHz 8-channel support (and other 8-channel compressed > formats): -- Rafał _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
