From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Decode the HDMI max data rate from the VBT.
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
tools/intel_vbt_decode.c | 22 +++++++++++++++++++++-
tools/intel_vbt_defs.h | 4 ++++
2 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/tools/intel_vbt_decode.c b/tools/intel_vbt_decode.c
index 9d90c69dbc9c..93a090f73d54 100644
--- a/tools/intel_vbt_decode.c
+++ b/tools/intel_vbt_decode.c
@@ -398,6 +398,26 @@ static const char *mipi_bridge_type(uint8_t type)
}
}
+static void dump_hmdi_max_data_rate(uint8_t hdmi_max_data_rate)
+{
+ static const uint16_t max_data_rate[] = {
+ [HDMI_MAX_DATA_RATE_PLATFORM] = 0,
+ [HDMI_MAX_DATA_RATE_297] = 297,
+ [HDMI_MAX_DATA_RATE_165] = 165,
+ };
+
+ if (hdmi_max_data_rate >= ARRAY_SIZE(max_data_rate))
+ printf("\t\tHDMI max data rate: <unknown> (0x%02x)\n",
+ hdmi_max_data_rate);
+ else if (hdmi_max_data_rate == HDMI_MAX_DATA_RATE_PLATFORM)
+ printf("\t\tHDMI max data rate: <platform max> (0x%02x)\n",
+ hdmi_max_data_rate);
+ else
+ printf("\t\tHDMI max data rate: %d MHz (0x%02x)\n",
+ max_data_rate[hdmi_max_data_rate],
+ hdmi_max_data_rate);
+}
+
static void dump_child_device(struct context *context,
const struct child_device_config *child)
{
@@ -418,7 +438,7 @@ static void dump_child_device(struct context *context,
printf("\t\tDP onboard redriver: 0x%02x\n", child->dp_onboard_redriver);
printf("\t\tDP ondock redriver: 0x%02x\n", child->dp_ondock_redriver);
printf("\t\tHDMI level shifter value: 0x%02x\n", child->hdmi_level_shifter_value);
- printf("\t\tHDMI max data rate: 0x%02x\n", child->hdmi_max_data_rate);
+ dump_hmdi_max_data_rate(child->hdmi_max_data_rate);
printf("\t\tOffset to DTD buffer for edidless CHILD: 0x%02x\n", child->dtd_buf_ptr);
printf("\t\tEdidless EFP: %s\n", YESNO(child->edidless_efp));
printf("\t\tCompression enable: %s\n", YESNO(child->compression_enable));
diff --git a/tools/intel_vbt_defs.h b/tools/intel_vbt_defs.h
index 3c3c421e2e43..e3d7745a9151 100644
--- a/tools/intel_vbt_defs.h
+++ b/tools/intel_vbt_defs.h
@@ -304,6 +304,10 @@ struct bdb_general_features {
#define DVO_PORT_MIPIC 23 /* 171 */
#define DVO_PORT_MIPID 24 /* 171 */
+#define HDMI_MAX_DATA_RATE_PLATFORM 0 /* 204 */
+#define HDMI_MAX_DATA_RATE_297 1 /* 204 */
+#define HDMI_MAX_DATA_RATE_165 2 /* 204 */
+
#define LEGACY_CHILD_DEVICE_CONFIG_SIZE 33
/* DDC Bus DDI Type 155+ */
--
2.13.6
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