ALSA: hdac: Add support for hda DMA Resume capability
Skylake sports new capability of DMA resume, DRSM where we can
resume the DMA. This capability is defined by presence of
AZX_DRSM_CAP_ID.
If this capability is present, we use this capability.
So we add:
snd_hdac_ext_stream_drsm_enable() - DMA resume caps
snd_hdac_ext_stream_set_dpibr() - set the DMA position
snd_hdac_ext_stream_set_lpib() - set the lpib
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index 425af06..f345495 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -12,6 +12,7 @@
* @spbcap: SPIB capabilities pointer
* @mlcap: MultiLink capabilities pointer
* @gtscap: gts capabilities pointer
+ * @drsmcap: dma resume capabilities pointer
* @hlink_list: link list of HDA links
*/
struct hdac_ext_bus {
@@ -23,6 +24,7 @@
void __iomem *spbcap;
void __iomem *mlcap;
void __iomem *gtscap;
+ void __iomem *drsmcap;
struct list_head hlink_list;
};
@@ -72,6 +74,9 @@
* @pplc_addr: processing pipe link stream pointer
* @spib_addr: software position in buffers stream pointer
* @fifo_addr: software position Max fifos stream pointer
+ * @dpibr_addr: DMA position in buffer resume pointer
+ * @dpib: DMA position in buffer
+ * @lpib: Linear position in buffer
* @decoupled: stream host and link is decoupled
* @link_locked: link is locked
* @link_prepared: link is prepared
@@ -86,6 +91,10 @@
void __iomem *spib_addr;
void __iomem *fifo_addr;
+ void __iomem *dpibr_addr;
+
+ u32 dpib;
+ u32 lpib;
bool decoupled:1;
bool link_locked:1;
bool link_prepared;
@@ -116,6 +125,11 @@
struct hdac_ext_stream *stream, u32 value);
int snd_hdac_ext_stream_get_spbmaxfifo(struct hdac_ext_bus *ebus,
struct hdac_ext_stream *stream);
+void snd_hdac_ext_stream_drsm_enable(struct hdac_ext_bus *ebus,
+ bool enable, int index);
+int snd_hdac_ext_stream_set_dpibr(struct hdac_ext_bus *ebus,
+ struct hdac_ext_stream *stream, u32 value);
+int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value);
void snd_hdac_ext_link_stream_start(struct hdac_ext_stream *hstream);
void snd_hdac_ext_link_stream_clear(struct hdac_ext_stream *hstream);