ALSA: intel_hdmi: Use the new non-cached allocation

The HDMI LPE audio driver requires the non-cached page allocations for
its buffers.  With the recent support of SNDRV_DMA_TYPE_DEV_UC type,
we can reduce lots of codes in the driver side and let the memalloc
core doing it properly.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index fa7dca5a68c897ebd201953f4be7040f9124786c..83d76c345940557f25a6e2b08150bacbd3dc404f 100644 (file)
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -30,7 +30,6 @@
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
-#include <asm/set_memory.h>
 #include <sound/core.h>
 #include <sound/asoundef.h>
 #include <sound/pcm.h>
@@ -1141,8 +1140,7 @@ static int had_pcm_hw_params(struct snd_pcm_substream *substream,
                             struct snd_pcm_hw_params *hw_params)
 {
        struct snd_intelhad *intelhaddata;
-       unsigned long addr;
-       int pages, buf_size, retval;
+       int buf_size, retval;
 
        intelhaddata = snd_pcm_substream_chip(substream);
        buf_size = params_buffer_bytes(hw_params);
@@ -1151,17 +1149,6 @@ static int had_pcm_hw_params(struct snd_pcm_substream *substream,
                return retval;
        dev_dbg(intelhaddata->dev, "%s:allocated memory = %d\n",
                __func__, buf_size);
-       /* mark the pages as uncached region */
-       addr = (unsigned long) substream->runtime->dma_area;
-       pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) / PAGE_SIZE;
-       retval = set_memory_uc(addr, pages);
-       if (retval) {
-               dev_err(intelhaddata->dev, "set_memory_uc failed.Error:%d\n",
-                       retval);
-               return retval;
-       }
-       memset(substream->runtime->dma_area, 0, buf_size);
-
        return retval;
 }
 
@@ -1171,21 +1158,11 @@ static int had_pcm_hw_params(struct snd_pcm_substream *substream,
 static int had_pcm_hw_free(struct snd_pcm_substream *substream)
 {
        struct snd_intelhad *intelhaddata;
-       unsigned long addr;
-       u32 pages;
 
        intelhaddata = snd_pcm_substream_chip(substream);
        had_do_reset(intelhaddata);
 
-       /* mark back the pages as cached/writeback region before the free */
-       if (substream->runtime->dma_area != NULL) {
-               addr = (unsigned long) substream->runtime->dma_area;
-               pages = (substream->runtime->dma_bytes + PAGE_SIZE - 1) /
-                                                               PAGE_SIZE;
-               set_memory_wb(addr, pages);
-               return snd_pcm_lib_free_pages(substream);
-       }
-       return 0;
+       return snd_pcm_lib_free_pages(substream);
 }
 
 /*
@@ -1860,7 +1837,7 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
                 * try to allocate 600k buffer as default which is large enough
                 */
                snd_pcm_lib_preallocate_pages_for_all(pcm,
-                                                     SNDRV_DMA_TYPE_DEV, NULL,
+                                                     SNDRV_DMA_TYPE_DEV_UC, NULL,
                                                      HAD_DEFAULT_BUFFER, HAD_MAX_BUFFER);
 
                /* create controls */