DSC DPCD color depth register advertises its color depth capabilities
by setting each of the bits that corresponding to a specific color
depth. This patch defines those specific color depths and adds
a helper to return an array of color depth capabilities.
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_dp_helper.c | 29 +++++++++++++++++++----------
include/drm/drm_dp_helper.h | 9 +++++----
2 files changed, 24 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 6d483487f2b4..286567063960 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1428,17 +1428,26 @@ u8 drm_dp_dsc_sink_line_buf_depth(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
}
EXPORT_SYMBOL(drm_dp_dsc_sink_line_buf_depth);
-u8 drm_dp_dsc_sink_max_color_depth(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
+void drm_dp_dsc_sink_color_depth_cap(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
+ u8 *dsc_sink_color_depth_cap)
{
+ int i, cnt = 0;
u8 color_depth = dsc_dpcd[DP_DSC_DEC_COLOR_DEPTH_CAP - DP_DSC_SUPPORT];
- if (color_depth & DP_DSC_12_BPC)
- return 12;
- if (color_depth & DP_DSC_10_BPC)
- return 10;
- if (color_depth & DP_DSC_8_BPC)
- return 8;
-
- return 0;
+ for (i = 1; i <= 3; i++) {
+ if (!(color_depth & BIT(i)))
+ continue;
+ switch (i) {
+ case 1:
+ dsc_sink_color_depth_cap[cnt++] = DP_DSC_8_BPC;
+ break;
+ case 2:
+ dsc_sink_color_depth_cap[cnt++] = DP_DSC_10_BPC;
+ break;
+ case 3:
+ dsc_sink_color_depth_cap[cnt++] = DP_DSC_12_BPC;
+ break;
+ }
+ }
}
-EXPORT_SYMBOL(drm_dp_dsc_sink_max_color_depth);
+EXPORT_SYMBOL(drm_dp_dsc_sink_color_depth_cap);
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 3314e91f6eb3..ea3233b0a790 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -242,9 +242,9 @@
# define DP_DSC_YCbCr420_Native (1 << 4)
#define DP_DSC_DEC_COLOR_DEPTH_CAP 0x06A
-# define DP_DSC_8_BPC (1 << 1)
-# define DP_DSC_10_BPC (1 << 2)
-# define DP_DSC_12_BPC (1 << 3)
+# define DP_DSC_8_BPC 8
+# define DP_DSC_10_BPC 10
+# define DP_DSC_12_BPC 12
#define DP_DSC_PEAK_THROUGHPUT 0x06B
# define DP_DSC_THROUGHPUT_MODE_0_MASK (0xf << 0)
@@ -1123,7 +1123,8 @@ drm_dp_is_branch(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
bool is_edp);
u8 drm_dp_dsc_sink_line_buf_depth(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]);
-u8 drm_dp_dsc_sink_max_color_depth(const u8 dsc_dpc[DP_DSC_RECEIVER_CAP_SIZE]);
+void drm_dp_dsc_sink_color_depth_cap(const u8 dsc_dpc[DP_DSC_RECEIVER_CAP_SIZE],
+ u8 *dsc_sink_color_depth_cap);
static inline bool
drm_dp_sink_supports_dsc(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])
--
2.19.1
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