diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c | 66 |
1 files changed, 60 insertions, 6 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c index 58dd62cce4bb..3966845c7694 100644 --- a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c +++ b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c @@ -40,6 +40,8 @@ static bool dsc_policy_enable_dsc_when_not_needed; static bool dsc_policy_disable_dsc_stream_overhead; +static bool disable_128b_132b_stream_overhead; + #ifndef MAX #define MAX(X, Y) ((X) > (Y) ? (X) : (Y)) #endif @@ -47,8 +49,44 @@ static bool dsc_policy_disable_dsc_stream_overhead; #define MIN(X, Y) ((X) < (Y) ? (X) : (Y)) #endif +/* Need to account for padding due to pixel-to-symbol packing + * for uncompressed 128b/132b streams. + */ +static uint32_t apply_128b_132b_stream_overhead( + const struct dc_crtc_timing *timing, const uint32_t kbps) +{ + uint32_t total_kbps = kbps; + + if (disable_128b_132b_stream_overhead) + return kbps; + + if (!timing->flags.DSC) { + struct fixed31_32 bpp; + struct fixed31_32 overhead_factor; + + bpp = dc_fixpt_from_int(kbps); + bpp = dc_fixpt_div_int(bpp, timing->pix_clk_100hz / 10); + + /* Symbols_per_HActive = HActive * bpp / (4 lanes * 32-bit symbol size) + * Overhead_factor = ceil(Symbols_per_HActive) / Symbols_per_HActive + */ + overhead_factor = dc_fixpt_from_int(timing->h_addressable); + overhead_factor = dc_fixpt_mul(overhead_factor, bpp); + overhead_factor = dc_fixpt_div_int(overhead_factor, 128); + overhead_factor = dc_fixpt_div( + dc_fixpt_from_int(dc_fixpt_ceil(overhead_factor)), + overhead_factor); + + total_kbps = dc_fixpt_ceil( + dc_fixpt_mul_int(overhead_factor, total_kbps)); + } + + return total_kbps; +} + uint32_t dc_bandwidth_in_kbps_from_timing( - const struct dc_crtc_timing *timing) + const struct dc_crtc_timing *timing, + const enum dc_link_encoding_format link_encoding) { uint32_t bits_per_channel = 0; uint32_t kbps; @@ -96,6 +134,9 @@ uint32_t dc_bandwidth_in_kbps_from_timing( kbps = kbps * 2 / 3; } + if (link_encoding == DC_LINK_ENCODING_DP_128b_132b) + kbps = apply_128b_132b_stream_overhead(timing, kbps); + return kbps; } @@ -107,6 +148,7 @@ static bool decide_dsc_bandwidth_range( const uint32_t num_slices_h, const struct dsc_enc_caps *dsc_caps, const struct dc_crtc_timing *timing, + const enum dc_link_encoding_format link_encoding, struct dc_dsc_bw_range *range); static uint32_t compute_bpp_x16_from_target_bandwidth( @@ -133,6 +175,7 @@ static bool setup_dsc_config( int target_bandwidth_kbps, const struct dc_crtc_timing *timing, const struct dc_dsc_config_options *options, + const enum dc_link_encoding_format link_encoding, struct dc_dsc_config *dsc_cfg); static bool dsc_buff_block_size_from_dpcd(int dpcd_buff_block_size, int *buff_block_size) @@ -398,6 +441,7 @@ bool dc_dsc_compute_bandwidth_range( uint32_t max_bpp_x16, const struct dsc_dec_dpcd_caps *dsc_sink_caps, const struct dc_crtc_timing *timing, + const enum dc_link_encoding_format link_encoding, struct dc_dsc_bw_range *range) { bool is_dsc_possible = false; @@ -417,11 +461,11 @@ bool dc_dsc_compute_bandwidth_range( if (is_dsc_possible) is_dsc_possible = setup_dsc_config(dsc_sink_caps, &dsc_enc_caps, 0, timing, - &options, &config); + &options, link_encoding, &config); if (is_dsc_possible) is_dsc_possible = decide_dsc_bandwidth_range(min_bpp_x16, max_bpp_x16, - config.num_slices_h, &dsc_common_caps, timing, range); + config.num_slices_h, &dsc_common_caps, timing, link_encoding, range); return is_dsc_possible; } @@ -557,6 +601,7 @@ static bool decide_dsc_bandwidth_range( const uint32_t num_slices_h, const struct dsc_enc_caps *dsc_caps, const struct dc_crtc_timing *timing, + const enum dc_link_encoding_format link_encoding, struct dc_dsc_bw_range *range) { uint32_t preferred_bpp_x16 = timing->dsc_fixed_bits_per_pixel_x16; @@ -586,7 +631,7 @@ static bool decide_dsc_bandwidth_range( /* populate output structure */ if (range->max_target_bpp_x16 >= range->min_target_bpp_x16 && range->min_target_bpp_x16 > 0) { /* native stream bandwidth */ - range->stream_kbps = dc_bandwidth_in_kbps_from_timing(timing); + range->stream_kbps = dc_bandwidth_in_kbps_from_timing(timing, link_encoding); /* max dsc target bpp */ range->max_kbps = dc_dsc_stream_bandwidth_in_kbps(timing, @@ -612,6 +657,7 @@ static bool decide_dsc_target_bpp_x16( const int target_bandwidth_kbps, const struct dc_crtc_timing *timing, const int num_slices_h, + const enum dc_link_encoding_format link_encoding, int *target_bpp_x16) { struct dc_dsc_bw_range range; @@ -619,7 +665,7 @@ static bool decide_dsc_target_bpp_x16( *target_bpp_x16 = 0; if (decide_dsc_bandwidth_range(policy->min_target_bpp * 16, policy->max_target_bpp * 16, - num_slices_h, dsc_common_caps, timing, &range)) { + num_slices_h, dsc_common_caps, timing, link_encoding, &range)) { if (target_bandwidth_kbps >= range.stream_kbps) { if (policy->enable_dsc_when_not_needed) /* enable max bpp even dsc is not needed */ @@ -796,6 +842,7 @@ static bool setup_dsc_config( int target_bandwidth_kbps, const struct dc_crtc_timing *timing, const struct dc_dsc_config_options *options, + const enum dc_link_encoding_format link_encoding, struct dc_dsc_config *dsc_cfg) { struct dsc_enc_caps dsc_common_caps; @@ -995,6 +1042,7 @@ static bool setup_dsc_config( target_bandwidth_kbps, timing, num_slices_h, + link_encoding, &target_bpp); dsc_cfg->bits_per_pixel = target_bpp; } @@ -1023,6 +1071,7 @@ bool dc_dsc_compute_config( const struct dc_dsc_config_options *options, uint32_t target_bandwidth_kbps, const struct dc_crtc_timing *timing, + const enum dc_link_encoding_format link_encoding, struct dc_dsc_config *dsc_cfg) { bool is_dsc_possible = false; @@ -1032,7 +1081,7 @@ bool dc_dsc_compute_config( is_dsc_possible = setup_dsc_config(dsc_sink_caps, &dsc_enc_caps, target_bandwidth_kbps, - timing, options, dsc_cfg); + timing, options, link_encoding, dsc_cfg); return is_dsc_possible; } @@ -1165,6 +1214,11 @@ void dc_dsc_policy_set_disable_dsc_stream_overhead(bool disable) dsc_policy_disable_dsc_stream_overhead = disable; } +void dc_set_disable_128b_132b_stream_overhead(bool disable) +{ + disable_128b_132b_stream_overhead = disable; +} + void dc_dsc_get_default_config_option(const struct dc *dc, struct dc_dsc_config_options *options) { options->dsc_min_slice_height_override = dc->debug.dsc_min_slice_height_override; 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