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drm/dsc: Modify DRM helper to return complete DSC color depth capabilities 

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.

v2:
* Simplify the logic (Ville)

Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Acked-by: Sean Paul <seanpaul@chromium.org> (For merging through
drm-intel)
Reviewed-by: Ville Syrjala <ville.syrjala@linux.intel.com>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181127214125.17658-1-manasi.d.navare@intel.com
hifive-unleashed-5.1
Manasi Navare 2018-11-27 13:41:03 -08:00
parent 39e84937b5
commit 4d4101c8b3
2 changed files with 10 additions and 7 deletions
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14
drivers/gpu/drm/drm_dp_helper.c
View File

@ -1428,17 +1428,19 @@ 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])
int drm_dp_dsc_sink_supported_input_bpcs(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE],
u8 dsc_bpc[3])
{
int num_bpc = 0;
u8 color_depth = dsc_dpcd[DP_DSC_DEC_COLOR_DEPTH_CAP - DP_DSC_SUPPORT];
if (color_depth & DP_DSC_12_BPC)
return 12;
dsc_bpc[num_bpc++] = 12;
if (color_depth & DP_DSC_10_BPC)
return 10;
dsc_bpc[num_bpc++] = 10;
if (color_depth & DP_DSC_8_BPC)
return 8;
dsc_bpc[num_bpc++] = 8;
return 0;
return num_bpc;
}
EXPORT_SYMBOL(drm_dp_dsc_sink_max_color_depth);
EXPORT_SYMBOL(drm_dp_dsc_sink_supported_input_bpcs);

3
include/drm/drm_dp_helper.h
View File

@ -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]);
int drm_dp_dsc_sink_supported_input_bpcs(const u8 dsc_dpc[DP_DSC_RECEIVER_CAP_SIZE],
u8 dsc_bpc[3]);
static inline bool
drm_dp_sink_supports_dsc(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE])