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ALSA: x86: intel_hdmi: add definitions and logic for DP audio

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Imported from legacy patches

Note: the new code doesn't assume a modified ELD but
an explicit notification that DP is present. It appears
that the i915 code does change the ELD so we could use
the ELD-based tests to check for DP audio

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Pierre-Louis Bossart
2017-01-31 14:16:52 -06:00
committed by Takashi Iwai
parent f95e29b921
commit 964ca8083c
4 changed files with 216 additions and 30 deletions
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8
sound/x86/intel_hdmi_audio.h
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@@ -44,7 +44,8 @@
#define MAX_CAP_STREAMS 0
#define HDMI_AUDIO_DRIVER "hdmi-audio"
#define INFO_FRAME_WORD1 0x000a0184
#define HDMI_INFO_FRAME_WORD1 0x000a0184
#define DP_INFO_FRAME_WORD1 0x00441b84
#define FIFO_THRESHOLD 0xFE
#define DMA_FIFO_THRESHOLD 0x7
#define BYTES_PER_WORD 0x4
@@ -134,6 +135,7 @@ struct snd_intelhad {
struct ring_buf_info buf_info[HAD_NUM_OF_RING_BUFS];
struct pcm_stream_info stream_info;
union otm_hdmi_eld_t eeld;
bool dp_output;
enum intel_had_aud_buf_type curr_buf;
int valid_buf_cnt;
unsigned int aes_bits;
@@ -156,8 +158,8 @@ struct had_ops {
void (*reset_audio)(u8 reset);
int (*prog_n)(u32 aud_samp_freq, u32 *n_param,
struct snd_intelhad *intelhaddata);
void (*prog_cts)(u32 aud_samp_freq, u32 tmds, u32 n_param,
struct snd_intelhad *intelhaddata);
void (*prog_cts)(u32 aud_samp_freq, u32 tmds, u32 link_rate,
u32 n_param, struct snd_intelhad *intelhaddata);
int (*audio_ctrl)(struct snd_pcm_substream *substream,
struct snd_intelhad *intelhaddata);
void (*prog_dip)(struct snd_pcm_substream *substream,