Read from DPCD receiver capability field for DP to HDMI
converter. The features for DP to HDMI converter are
- max TMDS characther clock rate
- max bits per component
- support for conversion from 3D frame sequential to frame pack
- support for YCBCR422 pass through
- support for YCBCR420 pass through
- support for conversion from YCBCR444 to YCBCR422
- support for conversion from YCBCR444 to YCBCR420
Signed-off-by: Mika Kahola <mika.kahola@xxxxxxxxx>
---
drivers/gpu/drm/drm_dp_helper.c | 8 ++++++++
include/drm/drm_dp_helper.h | 19 +++++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index f5cf706..ccd0fcb 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -456,6 +456,14 @@ int drm_dp_bd(struct drm_dp_aux *aux, struct drm_dp_bd *bd)
bd->dfp.dvi.bpc = info[2] & DP_DS_VGA_MAX_BPC_MASK;
bd->dfp.dvi.dual_link = info[3] & DP_DS_DVI_DUAL_LINK;
bd->dfp.dvi.hi_color_depth = info[3] & DP_DS_DVI_HI_COLOR_DEPTH;
+ } else if (bd->type & DP_DS_PORT_TYPE_HDMI) {
+ bd->dfp.hdmi.tmds_clk = info[1] * 2500;
+ bd->dfp.hdmi.bpc = info[2] & DP_DS_VGA_MAX_BPC_MASK;
+ bd->dfp.hdmi.frame_seq_to_frame_pack = info[3] & FRAME_SEQ_TO_FRAME_PACK;
+ bd->dfp.hdmi.ycbcr422_pass_through = info[3] & YCBCR422_PASS_THROUGH;
+ bd->dfp.hdmi.ycbcr420_pass_through = info[3] & YCBCR420_PASS_THROUGH;
+ bd->dfp.hdmi.conversion_from_ycbcr444_to_ycbcr422 = info[3] & YCBCR444_TO_YCBCR422;
+ bd->dfp.hdmi.conversion_from_ycbcr444_to_ycbcr420 = info[3] & YCBCR444_TO_YCBCR420;
}
}
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index da82459..3607250 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -223,6 +223,12 @@
/* offset 3 for DVI dual link and high color depth */
# define DP_DS_DVI_DUAL_LINK (1<<1)
# define DP_DS_DVI_HI_COLOR_DEPTH (1<<2)
+/* offset 3 for HDMI */
+# define FRAME_SEQ_TO_FRAME_PACK (1<<0)
+# define YCBCR422_PASS_THROUGH (1<<1)
+# define YCBCR420_PASS_THROUGH (1<<2)
+# define YCBCR444_TO_YCBCR422 (1<<3)
+# define YCBCR444_TO_YCBCR420 (1<<4)
/* link configuration */
#define DP_LINK_BW_SET 0x100
@@ -821,6 +827,18 @@ struct drm_dp_dvi {
bool dual_link;
bool hi_color_depth;
};
+/*
+ * DP to HDMI
+ */
+struct drm_dp_hdmi {
+ int tmds_clk;
+ uint8_t bpc;
+ bool frame_seq_to_frame_pack;
+ bool ycbcr422_pass_through;
+ bool ycbcr420_pass_through;
+ bool conversion_from_ycbcr444_to_ycbcr422;
+ bool conversion_from_ycbcr444_to_ycbcr420;
+};
/*
* Branch device
@@ -832,6 +850,7 @@ struct drm_dp_bd {
union {
struct drm_dp_vga vga;
struct drm_dp_dvi dvi;
+ struct drm_dp_hdmi hdmi;
} dfp;
};
--
1.9.1
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