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Commit a488e033 authored by Arnaud Patard's avatar Arnaud Patard Committed by Jaroslav Kysela
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[ALSA] cs4281 - fix DLLRDY not seen problem 



CS4281 driver
Reset the FPDN bit of the EPPMC register if needed.

Signed-off-by: default avatarArnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 22bc30c8

sound/pci/cs4281.c

+8 −0
Original line number Diff line number Diff line
@@ -206,7 +206,10 @@ MODULE_PARM_DESC(dual_codec, "Secondary Codec ID (0 = disabled)."); 


#define BA0_PMCS		0x0344	/* Power Management Control/Status */

#define BA0_CWPR		0x03e0	/* Configuration Write Protect */



#define BA0_EPPMC		0x03e4	/* Extended PCI Power Management Control */

#define BA0_EPPMC_FPDN		(1<<14) /* Full Power DowN */



#define BA0_GPIOR		0x03e8	/* GPIO Pin Interface Register */



#define BA0_SPMC		0x03ec	/* Serial Port Power Management Control (& ASDIN2 enable) */
@@ -1461,6 +1464,11 @@ static int snd_cs4281_chip_init(cs4281_t *chip) 
	int timeout;

	int retry_count = 2;



	/* Having EPPMC.FPDN=1 prevent proper chip initialisation */

	tmp = snd_cs4281_peekBA0(chip, BA0_EPPMC);

	if (tmp & BA0_EPPMC_FPDN)

		snd_cs4281_pokeBA0(chip, BA0_EPPMC, tmp & ~BA0_EPPMC_FPDN);



      __retry:

	tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);

	if (tmp != BA0_CFLR_DEFAULT) {