ALSA: hda: Enable sync-write operation as default for all controllers

In the end we already enabled the sync-write mode for most of HD-audio
controllers including Intel, and it's no big merit to keep the async
write mode for the rest.  Let's make it as default and drop the
superfluous AZX_DCAPS_SYNC_WRITE bit flag.

Also, avoid to set the allow_bus_reset flag, which is a quite unstable
and hackish behavior that was needed only for some early platforms
(decades ago).  The straight fallback to the single cmd mode is more
robust.

Link: https://lore.kernel.org/r/20200618144051.7415-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 9 deletions

diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
index 9765652a73d7..80016b7b6849 100644
--- a/sound/pci/hda/hda_controller.c
+++ b/sound/pci/hda/hda_controller.c
@@ -1202,15 +1202,8 @@ int azx_bus_init(struct azx *chip, const char *model)
 	if (chip->driver_caps & AZX_DCAPS_4K_BDLE_BOUNDARY)
 		bus->core.align_bdle_4k = true;
 
-	/* AMD chipsets often cause the communication stalls upon certain
-	 * sequence like the pin-detection.  It seems that forcing the synced
-	 * access works around the stall.  Grrr...
-	 */
-	if (chip->driver_caps & AZX_DCAPS_SYNC_WRITE) {
-		dev_dbg(chip->card->dev, "Enable sync_write for stable communication\n");
-		bus->core.sync_write = 1;
-		bus->allow_bus_reset = 1;
-	}
+	/* enable sync_write flag for stable communication as default */
+	bus->core.sync_write = 1;
 
 	return 0;
 }