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drm/i915: add DisplayPort amp unmute for LPE audio mode

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Enable unmute/mute amp notification. This doesn't seem to affect
HDMI support so this is done unconditionally.

An earlier version of this patch set a chicken bit at address 0x62F38
prior to the mute/unmute but this register doesn't seem to do anything
so this phase was removed.

v1->v2: Drop needless pipe A check, avoid temporary reg offset variable.
v2->v3: Add "_" prefix to VLV_AUD_PORT_EN_X_DBG as they are internal.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Pierre-Louis Bossart 2017-01-31 14:16:49 -06:00 committed by Takashi Iwai
parent b5f2be9ae5
commit d5d8c3a19e
2 changed files with 22 additions and 0 deletions
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10
drivers/gpu/drm/i915/i915_reg.h
View File

@ -2061,6 +2061,16 @@ enum skl_disp_power_wells {
#define I915_HDMI_LPE_AUDIO_BASE (VLV_DISPLAY_BASE + 0x65000)
#define I915_HDMI_LPE_AUDIO_SIZE 0x1000
/* DisplayPort Audio w/ LPE */
#define _VLV_AUD_PORT_EN_B_DBG (VLV_DISPLAY_BASE + 0x62F20)
#define _VLV_AUD_PORT_EN_C_DBG (VLV_DISPLAY_BASE + 0x62F30)
#define _VLV_AUD_PORT_EN_D_DBG (VLV_DISPLAY_BASE + 0x62F34)
#define VLV_AUD_PORT_EN_DBG(port) _MMIO_PORT3((port) - PORT_B, \
_VLV_AUD_PORT_EN_B_DBG, \
_VLV_AUD_PORT_EN_C_DBG, \
_VLV_AUD_PORT_EN_D_DBG)
#define VLV_AMP_MUTE (1 << 1)
#define GEN6_BSD_RNCID _MMIO(0x12198)
#define GEN7_FF_THREAD_MODE _MMIO(0x20a0)

12
drivers/gpu/drm/i915/intel_lpe_audio.c
View File

@ -337,6 +337,7 @@ void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
{
unsigned long irq_flags;
struct intel_hdmi_lpe_audio_pdata *pdata = NULL;
u32 audio_enable;
if (!HAS_LPE_AUDIO(dev_priv))
return;
@ -346,6 +347,8 @@ void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
spin_lock_irqsave(&pdata->lpe_audio_slock, irq_flags);
audio_enable = I915_READ(VLV_AUD_PORT_EN_DBG(port));
if (eld != NULL) {
memcpy(pdata->eld.eld_data, eld,
HDMI_MAX_ELD_BYTES);
@ -357,11 +360,20 @@ void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
pdata->tmds_clock_speed = tmds_clk_speed;
if (link_rate)
pdata->link_rate = link_rate;
/* Unmute the amp for both DP and HDMI */
I915_WRITE(VLV_AUD_PORT_EN_DBG(port),
audio_enable & ~VLV_AMP_MUTE);
} else {
memset(pdata->eld.eld_data, 0,
HDMI_MAX_ELD_BYTES);
pdata->hdmi_connected = false;
pdata->dp_output = false;
/* Mute the amp for both DP and HDMI */
I915_WRITE(VLV_AUD_PORT_EN_DBG(port),
audio_enable | VLV_AMP_MUTE);
}
if (pdata->notify_audio_lpe)