queue-4.19/alsa-hda-force-polling-mode-on-cnl-for-fixing-codec-.patch

   1 From 2e3cce3a33cf83a246d4abc233704bb3815ef91b Mon Sep 17 00:00:00 2001
   2 From: Bard Liao <yung-chuan.liao@linux.intel.com>
   3 Date: Mon, 27 May 2019 00:58:32 +0800
   4 Subject: ALSA: hda - Force polling mode on CNL for fixing codec communication
   5
   6 [ Upstream commit fa763f1b2858752e6150ffff46886a1b7faffc82 ]
   7
   8 We observed the same issue as reported by commit a8d7bde23e7130686b7662
   9 ("ALSA: hda - Force polling mode on CFL for fixing codec communication")
  10 We don't have a better solution. So apply the same workaround to CNL.
  11
  12 Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
  13 Signed-off-by: Takashi Iwai <tiwai@suse.de>
  14 Signed-off-by: Sasha Levin <sashal@kernel.org>
  15 ---
  16  sound/pci/hda/hda_intel.c | 5 +++--
  17  1 file changed, 3 insertions(+), 2 deletions(-)
  18
  19 diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
  20 index 45bf89ed31de..308ce76149cc 100644
  21 --- a/sound/pci/hda/hda_intel.c
  22 +++ b/sound/pci/hda/hda_intel.c
  23 @@ -378,6 +378,7 @@ enum {
  24
  25  #define IS_BXT(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x5a98)
  26  #define IS_CFL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0xa348)
  27 +#define IS_CNL(pci) ((pci)->vendor == 0x8086 && (pci)->device == 0x9dc8)
  28
  29  static char *driver_short_names[] = {
  30         [AZX_DRIVER_ICH] = "HDA Intel",
  31 @@ -1795,8 +1796,8 @@ static int azx_create(struct snd_card *card, struct pci_dev *pci,
  32         else
  33                 chip->bdl_pos_adj = bdl_pos_adj[dev];
  34
  35 -       /* Workaround for a communication error on CFL (bko#199007) */
  36 -       if (IS_CFL(pci))
  37 +       /* Workaround for a communication error on CFL (bko#199007) and CNL */
  38 +       if (IS_CFL(pci) || IS_CNL(pci))
  39                 chip->polling_mode = 1;
  40
  41         err = azx_bus_init(chip, model[dev], &pci_hda_io_ops);
  42 --
  43 2.20.1
  44