On Wed, 01 Feb 2017 15:45:24 +0100, Ville Syrjälä wrote:
On Tue, Jan 31, 2017 at 10:36:44PM +0100, Takashi Iwai wrote:
From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
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.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Takashi Iwai tiwai@suse.de
drivers/gpu/drm/i915/i915_reg.h | 10 ++++++++++ drivers/gpu/drm/i915/intel_lpe_audio.c | 17 +++++++++++++++++ 2 files changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index a9ffc8df241b..8fcc80cb864b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -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) diff --git a/drivers/gpu/drm/i915/intel_lpe_audio.c b/drivers/gpu/drm/i915/intel_lpe_audio.c index 245523e14418..f95624a46f27 100644 --- a/drivers/gpu/drm/i915/intel_lpe_audio.c +++ b/drivers/gpu/drm/i915/intel_lpe_audio.c @@ -337,15 +337,25 @@ 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;
i915_reg_t mmio;
if (!HAS_LPE_AUDIO(dev_priv)) return;
if (port == PORT_A) {
DRM_ERROR("PORT_A is not valid for HDMI/DP usages\n");return;}
Port A doesn't exists on these platforms at all. So this is just dead code.
pdata = dev_get_platdata( &(dev_priv->lpe_audio.platdev->dev));
spin_lock_irqsave(&pdata->lpe_audio_slock, irq_flags);
mmio = VLV_AUD_PORT_EN_DBG(port);
I'm not a fan of these temporary reg offset variables. Makes it hard to figure out later which register is being frobbed, especially when the variable name doesn't say what it actually is (like in this case). So I'd like to see this killed off.
How about something like below?
thanks,
Takashi
-- 8< -- From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Subject: [PATCH v2] drm/i915: add DisplayPort amp unmute for LPE audio mode
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.
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Takashi Iwai tiwai@suse.de --- drivers/gpu/drm/i915/i915_reg.h | 10 ++++++++++ drivers/gpu/drm/i915/intel_lpe_audio.c | 12 ++++++++++++ 2 files changed, 22 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index a9ffc8df241b..8fcc80cb864b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -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) diff --git a/drivers/gpu/drm/i915/intel_lpe_audio.c b/drivers/gpu/drm/i915/intel_lpe_audio.c index 245523e14418..5da14f40f94a 100644 --- a/drivers/gpu/drm/i915/intel_lpe_audio.c +++ b/drivers/gpu/drm/i915/intel_lpe_audio.c @@ -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)