drm/i915: HDMI/DP - ELD info refresh support for Haswell

ELD info should be updated dynamically according to hot plug event.
For haswell chip, clear/set the eld valid bit and output enable bit
from callback intel_disable/eanble_ddi().

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Wang Xingchao <xingchao.wang@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 2e904a5..33b9112 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -677,6 +677,7 @@ static void intel_ddi_mode_set(struct drm_encoder *encoder,
        DRM_DEBUG_KMS("Preparing DDI mode for Haswell on port %c, pipe %c\n",
                      port_name(port), pipe_name(pipe));
 
+       intel_crtc->eld_vld = false;
        if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
                struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 
@@ -1287,10 +1288,14 @@ static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
 static void intel_enable_ddi(struct intel_encoder *intel_encoder)
 {
        struct drm_encoder *encoder = &intel_encoder->base;
+       struct drm_crtc *crtc = encoder->crtc;
+       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+       int pipe = intel_crtc->pipe;
        struct drm_device *dev = encoder->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        enum port port = intel_ddi_get_encoder_port(intel_encoder);
        int type = intel_encoder->type;
+       uint32_t tmp;
 
        if (type == INTEL_OUTPUT_HDMI) {
                /* In HDMI/DVI mode, the port width, and swing/emphasis values
@@ -1303,18 +1308,34 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)
 
                ironlake_edp_backlight_on(intel_dp);
        }
+
+       if (intel_crtc->eld_vld) {
+               tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
+               tmp |= ((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
+               I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
+       }
 }
 
 static void intel_disable_ddi(struct intel_encoder *intel_encoder)
 {
        struct drm_encoder *encoder = &intel_encoder->base;
+       struct drm_crtc *crtc = encoder->crtc;
+       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+       int pipe = intel_crtc->pipe;
        int type = intel_encoder->type;
+       struct drm_device *dev = encoder->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       uint32_t tmp;
 
        if (type == INTEL_OUTPUT_EDP) {
                struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 
                ironlake_edp_backlight_off(intel_dp);
        }
+
+       tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
+       tmp &= ~((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
+       I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
 }
 
 int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7262786..305be11 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3721,10 +3721,12 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
        struct drm_device *dev = crtc->dev;
        struct drm_connector *connector;
        struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 
        /* crtc should still be enabled when we disable it. */
        WARN_ON(!crtc->enabled);
 
+       intel_crtc->eld_vld = false;
        dev_priv->display.crtc_disable(crtc);
        intel_crtc_update_sarea(crtc, false);
        dev_priv->display.off(crtc);
@@ -5792,6 +5794,7 @@ static void haswell_write_eld(struct drm_connector *connector,
        struct drm_i915_private *dev_priv = connector->dev->dev_private;
        uint8_t *eld = connector->eld;
        struct drm_device *dev = crtc->dev;
+       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
        uint32_t eldv;
        uint32_t i;
        int len;
@@ -5833,6 +5836,7 @@ static void haswell_write_eld(struct drm_connector *connector,
        DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
 
        eldv = AUDIO_ELD_VALID_A << (pipe * 4);
+       intel_crtc->eld_vld = true;
 
        if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
                DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index aeff0d1..66619d8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -211,6 +211,7 @@ struct intel_crtc {
         * some outputs connected to this crtc.
         */
        bool active;
+       bool eld_vld;
        bool primary_disabled; /* is the crtc obscured by a plane? */
        bool lowfreq_avail;
        struct intel_overlay *overlay;