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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1df5a06abb
Currently the converter channel count is set to the number of actual input channels. The audio infoframe channel count field is set similarly. However, sometimes the used channel map does not map all input channels to outputs. Notably, 3 channel modes (e.g. 2.1) require a dummy input channel so there are 4 input channels. According to the HDA specification, converter channel count should be programmed according to the number of _active_ channels. On Intel HDMI codecs (but not on NVIDIA), setting the converter channel to a higher value than there are actually mapped channels to HDMI slots will cause no audio to be output at all. Note that the effects of this issue are currently partially masked by other bugs that prevent the driver from actually unmapping channels in certain cases. For example, if a 4 channel stream is first created and prepared, it gets a FL,FR,RL,RR mapping (ALSA->HDMI slot mapping 0->0, 1->1, 2->4, 3->5). If one thereafter assigns a FR,FL,FC mapping to it, the driver will remap 2->3 but fail to unmap 2->4 and 3->5, so there are still 4 active channels and the issue will not trigger in this case. These bugs will be fixed separately. Fix the channel counts in the converter channel count field and in the audio infoframe channel count field to match the actual number of active channels. Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi> Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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| aoa | ||
| arm | ||
| atmel | ||
| core | ||
| drivers | ||
| firewire | ||
| i2c | ||
| isa | ||
| mips | ||
| oss | ||
| parisc | ||
| pci | ||
| pcmcia | ||
| ppc | ||
| sh | ||
| soc | ||
| sparc | ||
| spi | ||
| synth | ||
| usb | ||
| ac97_bus.c | ||
| Kconfig | ||
| last.c | ||
| Makefile | ||
| sound_core.c | ||
| sound_firmware.c | ||