[PATCH 16/66] drm/i915: Track has_audio in the pipe config

Daniel Vetter
2014-04-24T21:56:14Z

Including state readout and cross-checking. This allows us to get rid
of crtc->eld_vld on hsw+. It also means that fastboot will be unhappy
if the BIOS hasn't set up the audio routing like we want it too.

Wrt fastboot and external screens I see a few options:
- Don't.
- Try to fix up eld, infoframes and audio settings after the fact. But
that means some pretty extensive reworking of our code which
currently does all this while the pipe/port is still off.

I won't bother with converting SDVO over to this because the audio
support for SDVO is very lacking:
- We don't update the eld.
- We don't update the audio state on the sdvo encoder.
- We don't check whether the platform can even feed audio to the sdvo
encoder.

I've converted hdmi, dp & ddi all in one go since ddi needs both hdmi
and dp converted and so doing it step-by-step would have required a
few intermediate hacks.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/intel_ddi.c | 38 +++++++++++++-----------------------
drivers/gpu/drm/i915/intel_display.c | 6 ++----
drivers/gpu/drm/i915/intel_dp.c | 8 ++++++--
drivers/gpu/drm/i915/intel_drv.h | 5 ++++-
drivers/gpu/drm/i915/intel_hdmi.c | 10 ++++++++--
5 files changed, 34 insertions(+), 33 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 527fea50e599..096a7b94ec2b 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -375,7 +375,15 @@ static void intel_ddi_mode_set(struct intel_encoder *encoder)
DRM_DEBUG_KMS("Preparing DDI mode on port %c, pipe %c\n",
port_name(port), pipe_name(pipe));

- crtc->eld_vld = false;
+ if (crtc->config.has_audio) {
+ DRM_DEBUG_DRIVER("Audio on pipe %c on DDI\n",
+ pipe_name(crtc->pipe));
+
+ /* write eld */
+ DRM_DEBUG_DRIVER("DDI audio: write eld information\n");
+ intel_write_eld(&encoder->base, adjusted_mode);
+ }
+
if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
struct intel_digital_port *intel_dig_port =
@@ -384,31 +392,9 @@ static void intel_ddi_mode_set(struct intel_encoder *encoder)
intel_dp->DP = intel_dig_port->saved_port_bits |
DDI_BUF_CTL_ENABLE | DDI_BUF_EMP_400MV_0DB_HSW;
intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count);
-
- if (intel_dp->has_audio) {
- DRM_DEBUG_DRIVER("DP audio on pipe %c on DDI\n",
- pipe_name(crtc->pipe));
-
- /* write eld */
- DRM_DEBUG_DRIVER("DP audio: write eld information\n");
- intel_write_eld(&encoder->base, adjusted_mode);
- }
} else if (type == INTEL_OUTPUT_HDMI) {
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);

- if (intel_hdmi->has_audio) {
- /* Proper support for digital audio needs a new logic
- * and a new set of registers, so we leave it for future
- * patch bombing.
- */
- DRM_DEBUG_DRIVER("HDMI audio on pipe %c on DDI\n",
- pipe_name(crtc->pipe));
-
- /* write eld */
- DRM_DEBUG_DRIVER("HDMI audio: write eld information\n");
- intel_write_eld(&encoder->base, adjusted_mode);
- }
-
intel_hdmi->set_infoframes(&encoder->base,
crtc->config.has_hdmi_sink,
adjusted_mode);
@@ -1385,7 +1371,7 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)
intel_edp_psr_enable(intel_dp);
}

- if (intel_crtc->eld_vld && type != INTEL_OUTPUT_EDP) {
+ if (intel_crtc->config.has_audio) {
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);
@@ -1591,6 +1577,10 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
break;
}

+ temp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
+ if (temp & (AUDIO_OUTPUT_ENABLE_A << (intel_crtc->pipe * 4)))
+ pipe_config->has_audio = true;
+
if (encoder->type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp_bpp &&
pipe_config->pipe_bpp > dev_priv->vbt.edp_bpp) {
/*
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 099159e4881c..f8ebe9b59746 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4532,13 +4532,11 @@ 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);

dev_priv->display.crtc_disable(crtc);
- intel_crtc->eld_vld = false;
intel_crtc_update_sarea(crtc, false);
dev_priv->display.off(crtc);

@@ -7347,7 +7345,6 @@ 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 intel_crtc *intel_crtc = to_intel_crtc(crtc);
uint32_t eldv;
uint32_t i;
int len;
@@ -7386,7 +7383,6 @@ 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");
@@ -9626,6 +9622,8 @@ intel_pipe_config_compare(struct drm_device *dev,
IS_VALLEYVIEW(dev))
PIPE_CONF_CHECK_I(limited_color_range);

+ PIPE_CONF_CHECK_I(has_audio);
+
PIPE_CONF_CHECK_FLAGS(adjusted_mode.flags,
DRM_MODE_FLAG_INTERLACE);

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index a421c81f2d88..fded70572ff2 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -775,6 +775,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
pipe_config->has_pch_encoder = true;

pipe_config->has_dp_encoder = true;
+ pipe_config->has_audio = intel_dp->has_audio;

if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
@@ -934,7 +935,7 @@ static void intel_dp_mode_set(struct intel_encoder *encoder)
intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
intel_dp->DP |= DP_PORT_WIDTH(intel_dp->lane_count);

- if (intel_dp->has_audio) {
+ if (crtc->config.has_audio) {
DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
pipe_name(crtc->pipe));
intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
@@ -1477,8 +1478,11 @@ static void intel_dp_get_config(struct intel_encoder *encoder,
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
int dotclock;

+ tmp = I915_READ(intel_dp->output_reg);
+ if (tmp & DP_AUDIO_OUTPUT_ENABLE)
+ pipe_config->has_audio = true;
+
if ((port == PORT_A) || !HAS_PCH_CPT(dev)) {
- tmp = I915_READ(intel_dp->output_reg);
if (tmp & DP_SYNC_HS_HIGH)
flags |= DRM_MODE_FLAG_PHSYNC;
else
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d8cafb7e85ec..c85f5e5ddc7c 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -276,6 +276,10 @@ struct intel_crtc_config {
/* Whether we should send NULL infoframes. Required for audio. */
bool has_hdmi_sink;

+ /* Audio enabled on this pipe. Only valid if either has_hdmi_sink or
+ * has_dp_encoder is set. */
+ bool has_audio;
+
/*
* Enable dithering, used when the selected pipe bpp doesn't match the
* plane bpp.
@@ -366,7 +370,6 @@ struct intel_crtc {
*/
bool active;
unsigned long enabled_power_domains;
- bool eld_vld;
bool primary_enabled; /* is the primary plane (partially) visible? */
bool lowfreq_avail;
struct intel_overlay *overlay;
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 608292d5c428..7f18c19b91f9 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -658,7 +658,7 @@ static void intel_hdmi_mode_set(struct intel_encoder *encoder)
if (crtc->config.has_hdmi_sink)
hdmi_val |= HDMI_MODE_SELECT_HDMI;

- if (intel_hdmi->has_audio) {
+ if (crtc->config.has_audio) {
WARN_ON(!crtc->config.has_hdmi_sink);
DRM_DEBUG_DRIVER("Enabling HDMI audio on pipe %c\n",
pipe_name(crtc->pipe));
@@ -724,6 +724,9 @@ static void intel_hdmi_get_config(struct intel_encoder *encoder,
if (tmp & HDMI_MODE_SELECT_HDMI)
pipe_config->has_hdmi_sink = true;

+ if (tmp & HDMI_MODE_SELECT_HDMI)
+ pipe_config->has_audio = true;
+
pipe_config->adjusted_mode.flags |= flags;

if ((tmp & SDVO_COLOR_FORMAT_MASK) == HDMI_COLOR_FORMAT_12bpc)
@@ -746,7 +749,7 @@ static void intel_enable_hdmi(struct intel_encoder *encoder)
u32 temp;
u32 enable_bits = SDVO_ENABLE;

- if (intel_hdmi->has_audio)
+ if (intel_crtc->config.has_audio)
enable_bits |= SDVO_AUDIO_ENABLE;

temp = I915_READ(intel_hdmi->hdmi_reg);
@@ -917,6 +920,9 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev))
pipe_config->has_pch_encoder = true;

+ if (pipe_config->has_hdmi_sink && intel_hdmi->has_audio)
+ pipe_config->has_audio = true;
+
/*
* HDMI is either 12 or 8, so if the display lets 10bpc sneak
* through, clamp it down. Note that g4x/vlv don't support 12bpc hdmi
--
1.8.1.4