| Message ID | b05cc20e-90cf-5cc3-c331-1beba28764ca@maciej.szmigiero.name (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [v2,1/2] ALSA: pcm: add SNDRV_PCM_FORMAT_{S,U}20 | expand |
Hi Maciej,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on sound/for-next]
[also build test ERROR on v4.14 next-20171124]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Maciej-S-Szmigiero/ALSA-pcm-add-SNDRV_PCM_FORMAT_-S-U-20_4/20171125-082039
base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
config: x86_64-randconfig-x012-201747 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All errors (new ones prefixed by >>):
>> sound/soc//fsl/fsl_ssi.c:1237:37: error: 'SNDRV_PCM_FMTBIT_S20' undeclared here (not in a function)
.formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S20,
^~~~~~~~~~~~~~~~~~~~
vim +/SNDRV_PCM_FMTBIT_S20 +1237 sound/soc//fsl/fsl_ssi.c
1228
1229 static struct snd_soc_dai_driver fsl_ssi_ac97_dai = {
1230 .bus_control = true,
1231 .probe = fsl_ssi_dai_probe,
1232 .playback = {
1233 .stream_name = "AC97 Playback",
1234 .channels_min = 2,
1235 .channels_max = 2,
1236 .rates = SNDRV_PCM_RATE_8000_48000,
> 1237 .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S20,
1238 },
1239 .capture = {
1240 .stream_name = "AC97 Capture",
1241 .channels_min = 2,
1242 .channels_max = 2,
1243 .rates = SNDRV_PCM_RATE_48000,
1244 /* 16-bit capture is broken (errata ERR003778) */
1245 .formats = SNDRV_PCM_FMTBIT_S20,
1246 },
1247 .ops = &fsl_ssi_dai_ops,
1248 };
1249
1250
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
Hi Maciej,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on sound/for-next]
[also build test ERROR on v4.14 next-20171124]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Maciej-S-Szmigiero/ALSA-pcm-add-SNDRV_PCM_FORMAT_-S-U-20_4/20171125-082039
base: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-next
config: sparc64-allmodconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=sparc64
All errors (new ones prefixed by >>):
>> sound/soc/fsl/fsl_ssi.c:1237:37: error: 'SNDRV_PCM_FMTBIT_S20' undeclared here (not in a function); did you mean 'SNDRV_PCM_FMTBIT_S24'?
.formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S20,
^~~~~~~~~~~~~~~~~~~~
SNDRV_PCM_FMTBIT_S24
vim +1237 sound/soc/fsl/fsl_ssi.c
1228
1229 static struct snd_soc_dai_driver fsl_ssi_ac97_dai = {
1230 .bus_control = true,
1231 .probe = fsl_ssi_dai_probe,
1232 .playback = {
1233 .stream_name = "AC97 Playback",
1234 .channels_min = 2,
1235 .channels_max = 2,
1236 .rates = SNDRV_PCM_RATE_8000_48000,
> 1237 .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S20,
1238 },
1239 .capture = {
1240 .stream_name = "AC97 Capture",
1241 .channels_min = 2,
1242 .channels_max = 2,
1243 .rates = SNDRV_PCM_RATE_48000,
1244 /* 16-bit capture is broken (errata ERR003778) */
1245 .formats = SNDRV_PCM_FMTBIT_S20,
1246 },
1247 .ops = &fsl_ssi_dai_ops,
1248 };
1249
1250
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 20ef09e1a395..c350117c8e31 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -1278,14 +1278,15 @@ static struct snd_soc_dai_driver fsl_ssi_ac97_dai = { .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_8000_48000, - .formats = SNDRV_PCM_FMTBIT_S16_LE, + .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S20, }, .capture = { .stream_name = "AC97 Capture", .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_48000, - .formats = SNDRV_PCM_FMTBIT_S16_LE, + /* 16-bit capture is broken (errata ERR003778) */ + .formats = SNDRV_PCM_FMTBIT_S20, }, .ops = &fsl_ssi_dai_ops, }; @@ -1557,11 +1558,12 @@ static int fsl_ssi_probe(struct platform_device *pdev) /* Are the RX and the TX clocks locked? */ if (!of_find_property(np, "fsl,ssi-asynchronous", NULL)) { - if (!fsl_ssi_is_ac97(ssi_private)) + if (!fsl_ssi_is_ac97(ssi_private)) { ssi_private->cpu_dai_drv.symmetric_rates = 1; + ssi_private->cpu_dai_drv.symmetric_samplebits = 1; + } ssi_private->cpu_dai_drv.symmetric_channels = 1; - ssi_private->cpu_dai_drv.symmetric_samplebits = 1; } /* Determine the FIFO depth. */
When testing AC'97 capture on UDOO board (currently the only user of fsl_ssi driver in the AC'97 mode) it become obvious that there is a massive distortion above certain, small input signal. This problem has been traced to silicon errata ERR003778: "In AC97, 16-bit mode, received data is shifted by 4-bit locations" that has "No fix scheduled". This errata suggests a workaround of doing a 4-bit shift back in SDMA script for this specific operation mode, however our SDMA scripts are shared between various SoC peripherals so we can't really modify them. There is a simple way to avoid this problem, however, that is to disallow recording in 16-bit mode and only support it in AC'97-native 20-bit mode. We have to use a 4-byte format for this since SSI FIFOs do not allow 3-byte accesses (and these aren't supported by imx-sdma driver anyway). With this change the capture distortion is gone. We can also add this format as an additional one supported for playback, using this opportunity to make sure that we use CPU-endian-native formats in AC'97 mode as we already do in I2S mode. There is no problem in using different bit widths in playback and capture in AC'97 mode so allow this, too. Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> --- Changes from v1: Adapt format name to changes in the first patch from this series. sound/soc/fsl/fsl_ssi.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)