From 83358c85866ebd2af1229fc9870b93e126690671 Mon Sep 17 00:00:00 2001 From: Wang Xingchao Date: Thu, 16 Aug 2012 22:43:37 +0800 Subject: [PATCH] drm/i915: Haswell HDMI audio initialization Added new haswell_write_eld() to initialize Haswell HDMI audio registers to generate an unsolicited response to the audio controller driver to indicate that the controller sequence should start. Reviewed-by: Imre Deak Signed-off-by: Wang Xingchao Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 87 +++++++++++++++++++++++++++- 1 file changed, 86 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7a1c19756884..42c57581c53f 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5066,6 +5066,91 @@ static void g4x_write_eld(struct drm_connector *connector, I915_WRITE(G4X_AUD_CNTL_ST, i); } +static void haswell_write_eld(struct drm_connector *connector, + struct drm_crtc *crtc) +{ + struct drm_i915_private *dev_priv = connector->dev->dev_private; + uint8_t *eld = connector->eld; + struct drm_device *dev = crtc->dev; + uint32_t eldv; + uint32_t i; + int len; + int pipe = to_intel_crtc(crtc)->pipe; + int tmp; + + int hdmiw_hdmiedid = HSW_AUD_EDID_DATA(pipe); + int aud_cntl_st = HSW_AUD_DIP_ELD_CTRL(pipe); + int aud_config = HSW_AUD_CFG(pipe); + int aud_cntrl_st2 = HSW_AUD_PIN_ELD_CP_VLD; + + + DRM_DEBUG_DRIVER("HDMI: Haswell Audio initialize....\n"); + + /* Audio output enable */ + DRM_DEBUG_DRIVER("HDMI audio: enable codec\n"); + tmp = I915_READ(aud_cntrl_st2); + tmp |= (AUDIO_OUTPUT_ENABLE_A << (pipe * 4)); + I915_WRITE(aud_cntrl_st2, tmp); + + /* Wait for 1 vertical blank */ + intel_wait_for_vblank(dev, pipe); + + /* Set ELD valid state */ + tmp = I915_READ(aud_cntrl_st2); + DRM_DEBUG_DRIVER("HDMI audio: pin eld vld status=0x%8x\n", tmp); + tmp |= (AUDIO_ELD_VALID_A << (pipe * 4)); + I915_WRITE(aud_cntrl_st2, tmp); + tmp = I915_READ(aud_cntrl_st2); + DRM_DEBUG_DRIVER("HDMI audio: eld vld status=0x%8x\n", tmp); + + /* Enable HDMI mode */ + tmp = I915_READ(aud_config); + DRM_DEBUG_DRIVER("HDMI audio: audio conf: 0x%8x\n", tmp); + /* clear N_programing_enable and N_value_index */ + tmp &= ~(AUD_CONFIG_N_VALUE_INDEX | AUD_CONFIG_N_PROG_ENABLE); + I915_WRITE(aud_config, tmp); + + DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe)); + + eldv = AUDIO_ELD_VALID_A << (pipe * 4); + + if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) { + DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n"); + eld[5] |= (1 << 2); /* Conn_Type, 0x1 = DisplayPort */ + I915_WRITE(aud_config, AUD_CONFIG_N_VALUE_INDEX); /* 0x1 = DP */ + } else + I915_WRITE(aud_config, 0); + + if (intel_eld_uptodate(connector, + aud_cntrl_st2, eldv, + aud_cntl_st, IBX_ELD_ADDRESS, + hdmiw_hdmiedid)) + return; + + i = I915_READ(aud_cntrl_st2); + i &= ~eldv; + I915_WRITE(aud_cntrl_st2, i); + + if (!eld[0]) + return; + + i = I915_READ(aud_cntl_st); + i &= ~IBX_ELD_ADDRESS; + I915_WRITE(aud_cntl_st, i); + i = (i >> 29) & DIP_PORT_SEL_MASK; /* DIP_Port_Select, 0x1 = PortB */ + DRM_DEBUG_DRIVER("port num:%d\n", i); + + len = min_t(uint8_t, eld[2], 21); /* 84 bytes of hw ELD buffer */ + DRM_DEBUG_DRIVER("ELD size %d\n", len); + for (i = 0; i < len; i++) + I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i)); + + i = I915_READ(aud_cntrl_st2); + i |= eldv; + I915_WRITE(aud_cntrl_st2, i); + +} + static void ironlake_write_eld(struct drm_connector *connector, struct drm_crtc *crtc) { @@ -6936,7 +7021,7 @@ static void intel_init_display(struct drm_device *dev) dev_priv->display.write_eld = ironlake_write_eld; } else if (IS_HASWELL(dev)) { dev_priv->display.fdi_link_train = hsw_fdi_link_train; - dev_priv->display.write_eld = ironlake_write_eld; + dev_priv->display.write_eld = haswell_write_eld; } else dev_priv->display.update_wm = NULL; } else if (IS_G4X(dev)) {