This returns the maximum output BPP supported by the
eDP panel by reading the MAX_SUPPORTED_BPP DSC DPCD register.
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
---
include/drm/drm_dp_helper.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 06e41b2..4e8f357 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -980,6 +980,16 @@ drm_dp_is_branch(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
return dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT;
}
+/* DP/eDP DSC support */
+static inline u16
+drm_edp_dsc_get_output_bpp(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
+{
+ return dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_LOW - DP_DSC_SUPPORT] |
+ (dsc_dpcd[DP_DSC_MAX_BITS_PER_PIXEL_HI - DP_DSC_SUPPORT] &
+ DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK <<
+ DP_DSC_MAX_BITS_PER_PIXEL_HI_SHIFT);
+}
+
/*
* DisplayPort AUX channel
*/
--
2.7.4
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