drm/tegra: hdmi: Enable audio over HDMI
In order to use the HDA codec to forward audio data to the HDMI codec it
needs the ELD that is parsed from the monitor's EDID.
Also implement an interoperability mechanism between the HDA controller
and the HDMI codec. This uses vendor-defined scratch registers to pass
data from the HDMI codec driver to the HDMI driver (that implements the
receiving end of the HDMI codec). A custom format is used to pass audio
sample rate and channel count to the HDMI driver.
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/gpu/drm/tegra/hdmi.h b/drivers/gpu/drm/tegra/hdmi.h
index a882514..2339f13 100644
--- a/drivers/gpu/drm/tegra/hdmi.h
+++ b/drivers/gpu/drm/tegra/hdmi.h
@@ -468,9 +468,20 @@
#define HDMI_NV_PDISP_KEY_SKEY_INDEX 0xa3
#define HDMI_NV_PDISP_SOR_AUDIO_CNTRL0 0xac
-#define AUDIO_CNTRL0_INJECT_NULLSMPL (1 << 29)
+#define SOR_AUDIO_CNTRL0_SOURCE_SELECT_AUTO (0 << 20)
+#define SOR_AUDIO_CNTRL0_SOURCE_SELECT_SPDIF (1 << 20)
+#define SOR_AUDIO_CNTRL0_SOURCE_SELECT_HDAL (2 << 20)
+#define SOR_AUDIO_CNTRL0_INJECT_NULLSMPL (1 << 29)
+#define HDMI_NV_PDISP_SOR_AUDIO_SPARE0 0xae
+#define SOR_AUDIO_SPARE0_HBR_ENABLE (1 << 27)
+#define HDMI_NV_PDISP_SOR_AUDIO_HDA_CODEC_SCRATCH0 0xba
+#define SOR_AUDIO_HDA_CODEC_SCRATCH0_VALID (1 << 30)
+#define SOR_AUDIO_HDA_CODEC_SCRATCH0_FMT_MASK 0xffff
+#define HDMI_NV_PDISP_SOR_AUDIO_HDA_CODEC_SCRATCH1 0xbb
#define HDMI_NV_PDISP_SOR_AUDIO_HDA_ELD_BUFWR 0xbc
#define HDMI_NV_PDISP_SOR_AUDIO_HDA_PRESENSE 0xbd
+#define SOR_AUDIO_HDA_PRESENSE_VALID (1 << 1)
+#define SOR_AUDIO_HDA_PRESENSE_PRESENT (1 << 0)
#define HDMI_NV_PDISP_SOR_AUDIO_AVAL_0320 0xbf
#define HDMI_NV_PDISP_SOR_AUDIO_AVAL_0441 0xc0
@@ -481,6 +492,14 @@
#define HDMI_NV_PDISP_SOR_AUDIO_AVAL_1920 0xc5
#define HDMI_NV_PDISP_SOR_AUDIO_AVAL_DEFAULT 0xc5
+#define HDMI_NV_PDISP_INT_STATUS 0xcc
+#define INT_SCRATCH (1 << 3)
+#define INT_CP_REQUEST (1 << 2)
+#define INT_CODEC_SCRATCH1 (1 << 1)
+#define INT_CODEC_SCRATCH0 (1 << 0)
+#define HDMI_NV_PDISP_INT_MASK 0xcd
+#define HDMI_NV_PDISP_INT_ENABLE 0xce
+
#define HDMI_NV_PDISP_SOR_IO_PEAK_CURRENT 0xd1
#define PEAK_CURRENT_LANE0(x) (((x) & 0x7f) << 0)
#define PEAK_CURRENT_LANE1(x) (((x) & 0x7f) << 8)