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2021-05-10ASoC: imx-pcm-rpmsg: Fix warning of incorrect type in assignmentShengjiu Wang
The format in rpmsg is defained as unsigned char, there is warning when convert snd_pcm_format_t to it. sound/soc/fsl/imx-pcm-rpmsg.c:164:43: sparse: warning: incorrect type in assignment (different base types) sound/soc/fsl/imx-pcm-rpmsg.c:164:43: sparse: expected unsigned char format sound/soc/fsl/imx-pcm-rpmsg.c:164:43: sparse: got restricted snd_pcm_format_t [usertype] sound/soc/fsl/imx-pcm-rpmsg.c:167:43: sparse: warning: incorrect type in assignment (different base types) sound/soc/fsl/imx-pcm-rpmsg.c:167:43: sparse: expected unsigned char format sound/soc/fsl/imx-pcm-rpmsg.c:167:43: sparse: got restricted snd_pcm_format_t [usertype] Refine the unused RPMSG_DSD_U16_LE and RPMSG_DSD_U32_LE for these case to fix this sparse warning. Fixes: 3c00eceb2a53 ("ASoC: imx-pcm-rpmsg: Add platform driver for audio base on rpmsg") Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Link: https://lore.kernel.org/r/1620268240-1005-1-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-03-25ASoC: imx-pcm-rpmsg: Add platform driver for audio base on rpmsgShengjiu Wang
Platform driver based on rpmsg is the interface for sending and receiving rpmsg to and from M core. It will tell the Cortex-M core sound format/rate/channel, where is the data buffer, where is the period size, when to start, when to stop and when suspend or resume happen, each this behavior there is defined rpmsg command. Especially we designed the low power audio case, that is to allocate a large buffer and fill the data, then Cortex-A core can go to sleep mode, Cortex-M core continue to play the sound, when the buffer is consumed, Cortex-M core will trigger the Cortex-A core to wake up. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Link: https://lore.kernel.org/r/1615516725-4975-6-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>