Hi Mark, On Thu, 18 Apr 2019 at 18:26, Mark Brown <broonie@xxxxxxxxxx> wrote: > > The patch > > ASoC: sprd: Add reserved DMA memory support > > has been applied to the asoc tree at > > https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.2 > > All being well this means that it will be integrated into the linux-next > tree (usually sometime in the next 24 hours) and sent to Linus during > the next merge window (or sooner if it is a bug fix), however if > problems are discovered then the patch may be dropped or reverted. > > You may get further e-mails resulting from automated or manual testing > and review of the tree, please engage with people reporting problems and > send followup patches addressing any issues that are reported if needed. > > If any updates are required or you are submitting further changes they > should be sent as incremental updates against current git, existing > patches will not be replaced. > > Please add any relevant lists and maintainers to the CCs when replying > to this mail. I did not find this patch in your sound git tree and the linux-next tree, so could you check if you missed this patch? Or did I miss anything? Thanks a lot. > > Thanks, > Mark > > From 25a073bb9ceda91b8bf731b20ac01b68cc8877a9 Mon Sep 17 00:00:00 2001 > From: Baolin Wang <baolin.wang@xxxxxxxxxx> > Date: Fri, 12 Apr 2019 14:40:17 +0800 > Subject: [PATCH] ASoC: sprd: Add reserved DMA memory support > > For Spreadtrum audio platform driver, it need allocate a larger DMA buffer > dynamically to copy audio data between userspace and kernel space, but that > will increase the risk of memory allocation failure especially the system > is under heavy load situation. > > To make sure the audio can work in this scenario, we usually reserve one > region of memory to be used as a shared pool of DMA buffers for the > platform component. So add of_reserved_mem_device_init_by_idx() function > to initialize the shared pool of DMA buffers to be used by the platform > component. > > Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx> > Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> > --- > sound/soc/sprd/sprd-pcm-dma.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/sound/soc/sprd/sprd-pcm-dma.c b/sound/soc/sprd/sprd-pcm-dma.c > index 9be6d4b2bf74..d38ebbbbf169 100644 > --- a/sound/soc/sprd/sprd-pcm-dma.c > +++ b/sound/soc/sprd/sprd-pcm-dma.c > @@ -6,6 +6,7 @@ > #include <linux/dma/sprd-dma.h> > #include <linux/kernel.h> > #include <linux/module.h> > +#include <linux/of_reserved_mem.h> > #include <linux/platform_device.h> > #include <sound/pcm.h> > #include <sound/pcm_params.h> > @@ -530,8 +531,14 @@ static const struct snd_soc_component_driver sprd_soc_component = { > > static int sprd_soc_platform_probe(struct platform_device *pdev) > { > + struct device_node *np = pdev->dev.of_node; > int ret; > > + ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0); > + if (ret) > + dev_warn(&pdev->dev, > + "no reserved DMA memory for audio platform device\n"); > + > ret = devm_snd_soc_register_component(&pdev->dev, &sprd_soc_component, > NULL, 0); > if (ret) > -- > 2.20.1 > -- Baolin Wang Best Regards _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
