proxmox-mirrors/mirror_ubuntu-kernels
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_ubuntu-kernels.git synced 2026-01-06 20:44:11 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

dmaengine: at_hdmac: Repair bitfield macros for peripheral ID handling

Browse Source 
The MSB part of the peripheral IDs need to go into the ATC_SRC_PER_MSB
and ATC_DST_PER_MSB fields. Not the LSB part.

This fixes a severe regression for TSE-850 devices (compatible
axentia,tse850v3) where output to the audio I2S codec (the main
purpose of the device) simply do not work.

Fixes: d8840a7edc ("dmaengine: at_hdmac: Use bitfield access macros")
Cc: stable@vger.kernel.org
Signed-off-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/01e5dae1-d4b0-cf31-516b-423b11b077f1@axentia.se
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peter Rosin 2023-05-23 19:20:37 +02:00 committed by Vinod Koul
parent a1a5f2c887
commit 2a6c7e8cc7
1 changed files with 9 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/dma/at_hdmac.c
View File

@ -153,8 +153,6 @@
#define ATC_AUTO BIT(31) /* Auto multiple buffer tx enable */
/* Bitfields in CFG */
#define ATC_PER_MSB(h) ((0x30U & (h)) >> 4) /* Extract most significant bits of a handshaking identifier */
#define ATC_SRC_PER GENMASK(3, 0) /* Channel src rq associated with periph handshaking ifc h */
#define ATC_DST_PER GENMASK(7, 4) /* Channel dst rq associated with periph handshaking ifc h */
#define ATC_SRC_REP BIT(8) /* Source Replay Mod */
@ -181,10 +179,15 @@
#define ATC_DPIP_HOLE GENMASK(15, 0)
#define ATC_DPIP_BOUNDARY GENMASK(25, 16)
#define ATC_SRC_PER_ID(id) (FIELD_PREP(ATC_SRC_PER_MSB, (id)) | \
FIELD_PREP(ATC_SRC_PER, (id)))
#define ATC_DST_PER_ID(id) (FIELD_PREP(ATC_DST_PER_MSB, (id)) | \
FIELD_PREP(ATC_DST_PER, (id)))
#define ATC_PER_MSB GENMASK(5, 4) /* Extract MSBs of a handshaking identifier */
#define ATC_SRC_PER_ID(id) \
({ typeof(id) _id = (id); \
FIELD_PREP(ATC_SRC_PER_MSB, FIELD_GET(ATC_PER_MSB, _id)) | \
FIELD_PREP(ATC_SRC_PER, _id); })
#define ATC_DST_PER_ID(id) \
({ typeof(id) _id = (id); \
FIELD_PREP(ATC_DST_PER_MSB, FIELD_GET(ATC_PER_MSB, _id)) | \
FIELD_PREP(ATC_DST_PER, _id); })