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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2022-10-31 15:55:05 -0400
committerTakashi Iwai <tiwai@suse.de>2022-11-01 11:50:55 +0100
commit10e794bdba2734bad0d61864e7e526b13b75aa6b (patch)
treeeeb69ff60fff3949dd898e43b5de2aa2394899f6 /sound/pci/Makefile
parentALSA: arm: pxa: pxa2xx-ac97-lib: fix return value check of platform_get_irq() (diff)
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ALSA: hda: clarify comments on SCF changes
The commit 1f9d3d98694b1 ("ALSA: hda - set intel audio clock to a proper value") added a number of misleading comments. There is no ability to detect if an SCF value was set or not, what the code does is prevent the use of the 6MHz audio clock represented by the value 0 in LCTL.SCF. Changing the SCF settings does require the link to be power-cycled, but in all other cases the link is powered automatically when exiting reset. In other words, the power-cycle is an exception to the rule that the HDaudio legacy driver does not need to program SPA/CPA bits. In addition, the SCF related changes are only relevant for the first link. No functionality change, only comment clarifications. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Reviewed-by: Rander Wang <rander.wang@intel.com> Link: https://lore.kernel.org/r/20221031195505.249929-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
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