OMAP2+ platforms (like TI81xx, AM33xx) uses davinci-pcm driver. SRAM is not needed/used in EDMA transfers for audio on such platforms. However they do not provide generic SRAM APIs (sram_alloc() and sram_free()). In such cases the pcm driver cannot be used directly as it results in compilation failure on OMAP2 platforms.
Fix this by providing a config option to indicate missing SRAM API support. This config is enabled by default on Davinci platform so as to not break existing platforms. For OMAP2+ platforms, the config is disabled.
Signed-off-by: Hebbar, Gururaja gururaja.hebbar@ti.com --- :100644 100644 9e11a14... 328b463... M sound/soc/davinci/Kconfig :100644 100644 93ea3bf... 7ac5a19... M sound/soc/davinci/davinci-pcm.c sound/soc/davinci/Kconfig | 5 +++++ sound/soc/davinci/davinci-pcm.c | 8 ++++++++ 2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/sound/soc/davinci/Kconfig b/sound/soc/davinci/Kconfig index 9e11a14..328b463 100644 --- a/sound/soc/davinci/Kconfig +++ b/sound/soc/davinci/Kconfig @@ -15,6 +15,11 @@ config SND_DAVINCI_SOC_MCASP config SND_DAVINCI_SOC_VCIF tristate
+config SND_DAVINCI_HAVE_SRAM + bool + default y if ARCH_DAVINCI=y + default n if ARCH_OMAP=y + config SND_DAVINCI_SOC_EVM tristate "SoC Audio support for DaVinci DM6446, DM355 or DM365 EVM" depends on SND_DAVINCI_SOC diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c index 93ea3bf..7ac5a19 100644 --- a/sound/soc/davinci/davinci-pcm.c +++ b/sound/soc/davinci/davinci-pcm.c @@ -23,7 +23,9 @@ #include <sound/soc.h>
#include <asm/dma.h> +#if defined(CONFIG_SND_DAVINCI_HAVE_SRAM) #include <mach/sram.h> +#endif
#include "davinci-pcm.h"
@@ -259,6 +261,7 @@ static void davinci_pcm_dma_irq(unsigned link, u16 ch_status, void *data) } }
+#if defined(CONFIG_SND_DAVINCI_HAVE_SRAM) static int allocate_sram(struct snd_pcm_substream *substream, unsigned size, struct snd_pcm_hardware *ppcm) { @@ -289,6 +292,7 @@ exit2: exit1: return -ENOMEM; } +#endif
/* * Only used with ping/pong. @@ -676,7 +680,9 @@ static int davinci_pcm_open(struct snd_pcm_substream *substream)
ppcm = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? &pcm_hardware_playback : &pcm_hardware_capture; +#if defined(CONFIG_SND_DAVINCI_HAVE_SRAM) allocate_sram(substream, params->sram_size, ppcm); +#endif snd_soc_set_runtime_hwparams(substream, ppcm); /* ensure that buffer size is a multiple of period size */ ret = snd_pcm_hw_constraint_integer(runtime, @@ -817,11 +823,13 @@ static void davinci_pcm_free(struct snd_pcm *pcm) dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area, buf->addr); buf->area = NULL; +#if defined(CONFIG_SND_DAVINCI_HAVE_SRAM) iram_dma = buf->private_data; if (iram_dma) { sram_free(iram_dma->area, iram_dma->bytes); kfree(iram_dma); } +#endif } }