On Sun, 26 May 2019 18:58:32 +0200,
Bard liao wrote:
>
> From: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
>
> We observed the same issue as reported by commit a8d7bde23e7130686b7662
> ("ALSA: hda - Force polling mode on CFL for fixing codec communication")
> We don't have a better solution. So apply the same workaround to CNL.
>
> Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
I think this should go to 5.2-rc, as it's a bug fix, so likely I'm
going to take it soon later.
The question is about the rest patches. The patches 2-4 are basically
to move the polling handling into HDA-core, so they could be for 5.3.
And patch 5 is for SOF. This is still an open question. If this SOF
fix is needed for 5.2, all patches should go as well.
thanks,
Takashi
> ---
> sound/pci/hda/hda_intel.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index 2ec91085fa3e..a93468ffb85c 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -375,6 +375,7 @@ enum {
>
> #define IS_BXT(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x5a98)
> #define IS_CFL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0xa348)
> +#define IS_CNL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x9dc8)
>
> static char *driver_short_names[] = {
> [AZX_DRIVER_ICH] = "HDA Intel",
> @@ -1700,8 +1701,8 @@ static int azx_create(struct snd_card *card, struct pci_dev *pci,
> else
> chip->bdl_pos_adj = bdl_pos_adj[dev];
>
> - /* Workaround for a communication error on CFL (bko#199007) */
> - if (IS_CFL(pci))
> + /* Workaround for a communication error on CFL (bko#199007) and CNL */
> + if (IS_CFL(pci) || IS_CNL(pci))
> chip->polling_mode = 1;
>
> err = azx_bus_init(chip, model[dev], &pci_hda_io_ops);
> --
> 2.17.1
>
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