Expose intel_hdmi_dsc_get_min_max_bpp() to query the allowed compressed bpp range. This will be used in the subsequent change to compute the compressed bpp range in mode_valid() for an HDMI with DSC connected to a DP DFP.
Signed-off-by: Ankit Nautiyal <[email protected]> --- drivers/gpu/drm/i915/display/intel_hdmi.c | 20 +++++++++++++++----- drivers/gpu/drm/i915/display/intel_hdmi.h | 2 ++ 2 files changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index 428631abca74..c58c9202fc10 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -3325,9 +3325,19 @@ intel_hdmi_dsc_get_num_slices(const struct drm_display_mode *mode, return target_slices; } -static void -get_dsc_min_max_bpp(enum intel_output_format output_format, u8 bpc, - bool hdmi_all_bpp, int *min_dsc_bpp, int *max_dsc_bpp) +/* + * intel_hdmi_dsc_get_min_max_bpp - get the min and max compressed bpp range + * allowed for a given output format and bpc. + * + * @output_format: video output format + * @bpc: bits per color + * @hdmi_all_bpp: sink supports decoding of 1/16th bpp setting + * @min_dsc_bpp: returns the minimum allowed compressed bpp + * @max_dsc_bpp: returns the maximum allowed compressed bpp + */ +void +intel_hdmi_dsc_get_min_max_bpp(enum intel_output_format output_format, u8 bpc, + bool hdmi_all_bpp, int *min_dsc_bpp, int *max_dsc_bpp) { /* * Get min bpp and max bpp as per Table 7.23, in HDMI2.1 spec @@ -3434,8 +3444,8 @@ intel_hdmi_dsc_get_bpp(int src_fractional_bpp, int slice_width, int num_slices, int max_dsc_bpp, min_dsc_bpp; int dsc_bpp_x16; - get_dsc_min_max_bpp(output_format, bpc, hdmi_all_bpp, - &min_dsc_bpp, &max_dsc_bpp); + intel_hdmi_dsc_get_min_max_bpp(output_format, bpc, hdmi_all_bpp, + &min_dsc_bpp, &max_dsc_bpp); dsc_bpp_x16 = get_dsc_compressed_bpp(num_slices, slice_width, hdmi_max_chunk_bytes, diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.h b/drivers/gpu/drm/i915/display/intel_hdmi.h index c3a0e81615e4..dc81a62aac5e 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.h +++ b/drivers/gpu/drm/i915/display/intel_hdmi.h @@ -57,6 +57,8 @@ int intel_hdmi_tmds_clock(int clock, int bpc, enum intel_output_format sink_form int intel_hdmi_dsc_get_bpp(int src_fractional_bpp, int slice_width, int num_slices, enum intel_output_format output_format, int bpc, bool hdmi_all_bpp, int hdmi_max_chunk_bytes); +void intel_hdmi_dsc_get_min_max_bpp(enum intel_output_format output_format, u8 bpc, + bool hdmi_all_bpp, int *min_dsc_bpp, int *max_dsc_bpp); int intel_hdmi_dsc_get_num_slices(const struct drm_display_mode *mode, enum intel_output_format output_format, int src_max_slices, int src_max_slice_width, -- 2.50.1
