@@ -1277,6 +1277,7 @@ find_cea_block(struct edid *edid)
#define HDMI_IDENTIFIER 0x000C03
#define AUDIO_BLOCK 0x01
#define VENDOR_BLOCK 0x03
+#define SPEAKER_BLOCK 0x04
#define EDID_BASIC_AUDIO (1 << 6)
/**
@@ -1305,6 +1306,176 @@ u8 *drm_find_cea_extension(struct edid *
}
EXPORT_SYMBOL(drm_find_cea_extension);
+static void
+parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
+{
+ connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
+
+ connector->dvi_dual = db[6] & 1;
+ connector->max_tmds_clock = db[7] * 5;
+
+ connector->latency_present[0] = db[8] >> 7;
+ connector->latency_present[1] = (db[8] >> 6) & 1;
+ connector->video_latency[0] = db[9];
+ connector->audio_latency[0] = db[10];
+ connector->video_latency[1] = db[11];
+ connector->audio_latency[1] = db[12];
+
+ DRM_LOG_KMS("HDMI: DVI dual %d, "
+ "max TMDS clock %d, "
+ "latency present %d %d, "
+ "video latency %d %d, "
+ "audio latency %d %d\n",
+ connector->dvi_dual,
+ connector->max_tmds_clock,
+ (int) connector->latency_present[0],
+ (int) connector->latency_present[1],
+ connector->video_latency[0],
+ connector->video_latency[1],
+ connector->audio_latency[0],
+ connector->audio_latency[1]);
+}
+
+static void
+monitor_name(struct detailed_timing *t, void *data)
+{
+ if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
+ *(u8 **)data = t->data.other_data.data.str.str;
+}
+
+/**
+ * drm_edid_to_eld - build ELD from EDID
+ * @connector: connector corresponding to the HDMI/DP sink
+ * @edid: EDID to parse
+ *
+ * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
+ * Some ELD fields are left to the graphics driver caller:
+ * - Conn_Type
+ * - HDCP
+ * - Port_ID
+ */
+void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
+{
+ uint8_t *eld = connector->eld;
+ u8 *cea;
+ u8 *name;
+ u8 *db;
+ int sad_count = 0;
+ int mnl;
+ int dbl;
+
+ memset(eld, 0, sizeof(connector->eld));
+
+ cea = drm_find_cea_extension(edid);
+ if (!cea) {
+ DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
+ return;
+ }
+
+ name = NULL;
+ drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
+ for (mnl = 0; name && mnl < 13; mnl++) {
+ if (name[mnl] == 0x0a)
+ break;
+ eld[20 + mnl] = name[mnl];
+ }
+ eld[4] = (cea[1] << 5) | mnl;
+ DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
+
+ eld[0] = 2 << 3; /* ELD version: 2 */
+
+ eld[16] = edid->mfg_id[0];
+ eld[17] = edid->mfg_id[1];
+ eld[18] = edid->prod_code[0];
+ eld[19] = edid->prod_code[1];
+
+ for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
+ dbl = db[0] & 0x1f;
+
+ switch ((db[0] & 0xe0) >> 5) {
+ case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
+ sad_count = dbl / 3;
+ memcpy(eld + 20 + mnl, &db[1], dbl);
+ break;
+ case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
+ eld[7] = db[1];
+ break;
+ case VENDOR_BLOCK:
+ /* HDMI Vendor-Specific Data Block */
+ if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
+ parse_hdmi_vsdb(connector, db);
+ break;
+ default:
+ break;
+ }
+ }
+ eld[5] |= sad_count << 4;
+ eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
+
+ DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
+}
+EXPORT_SYMBOL(drm_edid_to_eld);
+
+/**
+ * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in milli-seconds
+ * @connector: connector associated with the HDMI/DP sink
+ * @mode: the display mode
+ */
+int drm_av_sync_delay(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
+ int a, v;
+
+ if (!connector->latency_present[0])
+ return 0;
+ if (!connector->latency_present[1])
+ i = 0;
+
+ a = connector->audio_latency[i];
+ v = connector->video_latency[i];
+
+ /*
+ * HDMI/DP sink doesn't support audio or video?
+ */
+ if (a == 255 || v == 255)
+ return 0;
+
+ /*
+ * Convert raw edid values to milli-seconds.
+ * Treat unknown latency as 0ms.
+ */
+ if (a)
+ a = min(2 * (a - 1), 500);
+ if (v)
+ v = min(2 * (v - 1), 500);
+
+ return max(v - a, 0);
+}
+EXPORT_SYMBOL(drm_av_sync_delay);
+
+/**
+ * drm_select_eld - select one ELD from multiple HDMI/DP sinks
+ * @encoder: the encoder just changed display mode
+ * @mode: the adjusted display mode
+ *
+ * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
+ * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
+ */
+struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
+ struct drm_display_mode *mode)
+{
+ struct drm_connector *connector;
+ struct drm_device *dev = encoder->dev;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head)
+ if (connector->encoder == encoder)
+ return connector;
+
+ return NULL;
+}
+EXPORT_SYMBOL(drm_select_eld);
+
/**
* drm_detect_hdmi_monitor - detect whether monitor is hdmi.
* @edid: monitor EDID information
@@ -193,6 +193,8 @@ static void intel_hdmi_mode_set(struct d
intel_ironlake_hdmi_set_avi_infoframe(encoder);
else
intel_hdmi_set_avi_infoframe(encoder);
+
+ intel_write_eld(encoder, crtc, adjusted_mode);
}
static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
@@ -269,6 +271,7 @@ intel_hdmi_detect(struct drm_connector *
status = connector_status_connected;
intel_hdmi->has_hdmi_sink = drm_detect_hdmi_monitor(edid);
intel_hdmi->has_audio = drm_detect_monitor_audio(edid);
+ drm_edid_to_eld(connector, edid);
}
connector->display_info.raw_edid = NULL;
kfree(edid);
@@ -230,4 +230,13 @@ struct edid {
#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
+struct drm_encoder;
+struct drm_connector;
+struct drm_display_mode;
+void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid);
+int drm_av_sync_delay(struct drm_connector *connector,
+ struct drm_display_mode *mode);
+struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
+ struct drm_display_mode *mode);
+
#endif /* __DRM_EDID_H__ */
@@ -31,6 +31,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/vgaarb.h>
+#include <drm/drm_edid.h>
#include "drmP.h"
#include "intel_drv.h"
#include "i915_drm.h"
@@ -5583,6 +5584,120 @@ static int intel_crtc_mode_set(struct dr
return ret;
}
+static void g4x_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;
+ uint32_t eldv;
+ uint32_t len;
+ uint32_t i;
+
+ i = I915_READ(G4X_AUD_VID_DID);
+
+ if (i == INTEL_AUDIO_DEVBLC || i == INTEL_AUDIO_DEVCL)
+ eldv = G4X_ELDV_DEVCL_DEVBLC;
+ else
+ eldv = G4X_ELDV_DEVCTG;
+
+ i = I915_READ(G4X_AUD_CNTL_ST);
+ i &= ~(eldv | G4X_ELD_ADDR);
+ len = (i >> 9) & 0x1f; /* ELD buffer size */
+ I915_WRITE(G4X_AUD_CNTL_ST, i);
+
+ if (!eld[0])
+ return;
+
+ len = min_t(uint8_t, eld[2], len);
+ DRM_DEBUG_DRIVER("ELD size %d\n", len);
+ for (i = 0; i < len; i++)
+ I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i));
+
+ i = I915_READ(G4X_AUD_CNTL_ST);
+ i |= eldv;
+ I915_WRITE(G4X_AUD_CNTL_ST, i);
+}
+
+static void ironlake_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;
+ uint32_t eldv;
+ uint32_t i;
+ int len;
+ int hdmiw_hdmiedid;
+ int aud_cntl_st;
+
+ i = to_intel_crtc(crtc)->pipe;
+ hdmiw_hdmiedid = GEN6_HDMIW_HDMIEDID_A + i * 0x100;
+ aud_cntl_st = GEN6_AUD_CNTL_ST_A + i * 0x100;
+
+ DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(i));
+
+ i = I915_READ(aud_cntl_st);
+ i = (i >> 29) & 0x3; /* DIP_Port_Select, 0x1 = PortB */
+ if (!i) {
+ DRM_DEBUG_DRIVER("Audio directed to unknown port\n");
+ /* operate blindly on all ports */
+ eldv = GEN6_ELD_VALIDB;
+ eldv |= GEN6_ELD_VALIDB << 4;
+ eldv |= GEN6_ELD_VALIDB << 8;
+ } else {
+ DRM_DEBUG_DRIVER("ELD on port %c\n", 'A' + i);
+ eldv = GEN6_ELD_VALIDB << ((i - 1) * 4);
+ }
+
+ i = I915_READ(GEN6_AUD_CNTL_ST2);
+ i &= ~eldv;
+ I915_WRITE(GEN6_AUD_CNTL_ST2, i);
+
+ if (!eld[0])
+ return;
+
+ if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
+ DRM_DEBUG_DRIVER("ELD: DisplayPort detected\n");
+ eld[5] |= (1 << 2); /* Conn_Type, 0x1 = DisplayPort */
+ }
+
+ i = I915_READ(aud_cntl_st);
+ i &= ~GEN6_ELD_ADDRESS;
+ I915_WRITE(aud_cntl_st, 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(GEN6_AUD_CNTL_ST2);
+ i |= eldv;
+ I915_WRITE(GEN6_AUD_CNTL_ST2, i);
+}
+
+void intel_write_eld(struct drm_encoder *encoder,
+ struct drm_crtc *crtc,
+ struct drm_display_mode *mode)
+{
+ struct drm_connector *connector;
+ struct drm_device *dev = encoder->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ connector = drm_select_eld(encoder, mode);
+ if (!connector)
+ return;
+
+ DRM_DEBUG_DRIVER("ELD on [CONNECTOR:%d:%s], [ENCODER:%d:%s]\n",
+ connector->base.id,
+ drm_get_connector_name(connector),
+ connector->encoder->base.id,
+ drm_get_encoder_name(connector->encoder));
+
+ connector->eld[6] = drm_av_sync_delay(connector, mode) / 2;
+
+ if (dev_priv->display.write_eld)
+ dev_priv->display.write_eld(connector, crtc);
+}
+
/** Loads the palette/gamma unit for the CRTC with the prepared values */
void intel_crtc_load_lut(struct drm_crtc *crtc)
{
@@ -8101,6 +8216,7 @@ static void intel_init_display(struct dr
}
dev_priv->display.fdi_link_train = ironlake_fdi_link_train;
dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
+ dev_priv->display.write_eld = ironlake_write_eld;
} else if (IS_GEN6(dev)) {
if (SNB_READ_WM0_LATENCY()) {
dev_priv->display.update_wm = sandybridge_update_wm;
@@ -8111,6 +8227,7 @@ static void intel_init_display(struct dr
}
dev_priv->display.fdi_link_train = gen6_fdi_link_train;
dev_priv->display.init_clock_gating = gen6_init_clock_gating;
+ dev_priv->display.write_eld = ironlake_write_eld;
} else if (IS_IVYBRIDGE(dev)) {
/* FIXME: detect B0+ stepping and use auto training */
dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
@@ -8142,6 +8259,7 @@ static void intel_init_display(struct dr
dev_priv->display.update_wm = pineview_update_wm;
dev_priv->display.init_clock_gating = gen3_init_clock_gating;
} else if (IS_G4X(dev)) {
+ dev_priv->display.write_eld = g4x_write_eld;
dev_priv->display.update_wm = g4x_update_wm;
dev_priv->display.init_clock_gating = g4x_init_clock_gating;
} else if (IS_GEN4(dev)) {
@@ -3462,4 +3462,24 @@
#define GEN6_PCODE_DATA 0x138128
#define GEN6_PCODE_FREQ_IA_RATIO_SHIFT 8
+#define G4X_AUD_VID_DID 0x62020
+#define INTEL_AUDIO_DEVCL 0x808629FB
+#define INTEL_AUDIO_DEVBLC 0x80862801
+#define INTEL_AUDIO_DEVCTG 0x80862802
+
+#define G4X_AUD_CNTL_ST 0x620B4
+#define G4X_ELDV_DEVCL_DEVBLC (1 << 13)
+#define G4X_ELDV_DEVCTG (1 << 14)
+#define G4X_ELD_ADDR (0xf << 5)
+#define G4X_ELD_ACK (1 << 4)
+#define G4X_HDMIW_HDMIEDID 0x6210C
+#define GEN6_HDMIW_HDMIEDID_A 0xE2050
+#define GEN6_AUD_CNTL_ST_A 0xE20B4
+#define GEN6_ELD_BUFFER_SIZE (0x1f << 10)
+#define GEN6_ELD_ADDRESS (0x1f << 5)
+#define GEN6_ELD_ACK (1 << 4)
+#define GEN6_AUD_CNTL_ST2 0xE20C0
+#define GEN6_ELD_VALIDB (1 << 0)
+#define GEN6_CP_READYB (1 << 1)
+
#endif /* _I915_REG_H_ */
@@ -356,4 +356,7 @@ extern void intel_fb_output_poll_changed
extern void intel_fb_restore_mode(struct drm_device *dev);
extern void intel_init_clock_gating(struct drm_device *dev);
+extern void intel_write_eld(struct drm_encoder *encoder,
+ struct drm_crtc *crtc,
+ struct drm_display_mode *mode);
#endif /* __INTEL_DRV_H__ */
@@ -26,6 +26,7 @@
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/fb.h>
+#include <drm/drm_edid.h>
#include "drmP.h"
#include "intel_drv.h"
#include "i915_drv.h"
@@ -74,6 +75,7 @@ int intel_ddc_get_modes(struct drm_conne
if (edid) {
drm_mode_connector_update_edid_property(connector, edid);
ret = drm_add_edid_modes(connector, edid);
+ drm_edid_to_eld(connector, edid);
connector->display_info.raw_edid = NULL;
kfree(edid);
}
@@ -464,6 +464,8 @@ enum drm_connector_force {
/* DACs should rarely do this without a lot of testing */
#define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
+#define MAX_ELD_BYTES 128
+
/**
* drm_connector - central DRM connector control structure
* @crtc: CRTC this connector is currently connected to, NULL if none
@@ -521,6 +523,13 @@ struct drm_connector {
uint32_t force_encoder_id;
struct drm_encoder *encoder; /* currently active encoder */
+ /* EDID bits */
+ uint8_t eld[MAX_ELD_BYTES];
+ bool dvi_dual;
+ int max_tmds_clock; /* in MHz */
+ bool latency_present[2];
+ int video_latency[2]; /* [0]: progressive, [1]: interlaced */
+ int audio_latency[2];
int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */
};
@@ -794,6 +794,8 @@ intel_dp_mode_set(struct drm_encoder *en
else
intel_dp->DP |= DP_PLL_FREQ_270MHZ;
}
+
+ intel_write_eld(encoder, crtc, adjusted_mode);
}
static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
@@ -208,6 +208,8 @@ struct drm_i915_display_funcs {
struct drm_display_mode *adjusted_mode,
int x, int y,
struct drm_framebuffer *old_fb);
+ void (*write_eld)(struct drm_connector *connector,
+ struct drm_crtc *crtc);
void (*fdi_link_train)(struct drm_crtc *crtc);
void (*init_clock_gating)(struct drm_device *dev);
void (*init_pch_clock_gating)(struct drm_device *dev);