Read from DPCD receiver capability field for the
DP++ devices. The features are
- max TMDS charachter clock
- max bits per component
- support for conversion from 3D frame sequential to
frame pack
Signed-off-by: Mika Kahola <mika.kah...@intel.com>
---
drivers/gpu/drm/drm_dp_helper.c | 4 ++++
include/drm/drm_dp_helper.h | 10 ++++++++++
2 files changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index ccd0fcb..f98e4be 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -464,6 +464,10 @@ int drm_dp_bd(struct drm_dp_aux *aux, struct drm_dp_bd *bd)
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;
+ } else if (bd->type & DP_DS_PORT_TYPE_DP_DUALMODE) {
+ bd->dfp.dual_mode.tmds_clk = info[1] * 2500;
+ bd->dfp.dual_mode.bpc = info[2] &
DP_DS_VGA_MAX_BPC_MASK;
+ bd->dfp.dual_mode.frame_seq_to_frame_pack = info[3] &
FRAME_SEQ_TO_FRAME_PACK;
}
}
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index b8c4960..adf05a1 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -842,6 +842,15 @@ struct drm_dp_hdmi {
};
/*
+ * DP to DP++
+ */
+struct drm_dp_dual_mode {
+ int tmds_clk;
+ uint8_t bpc;
+ bool frame_seq_to_frame_pack;
+};
+
+/*
* Branch device
*/
struct drm_dp_bd {
@@ -852,6 +861,7 @@ struct drm_dp_bd {
struct drm_dp_vga vga;
struct drm_dp_dvi dvi;
struct drm_dp_hdmi hdmi;
+ struct drm_dp_dual_mode dual_mode;
} dfp;
};
--
1.9.1
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