From: Wenjing Liu <[email protected]> [why] Some asics don't support FEC but FEC overhead is added into link bandwidth calculation by mistake. This causes certain timing cannot be validated.
[how] Only include FEC overhead if both asic and display support FEC. Signed-off-by: Wenjing Liu <[email protected]> Reviewed-by: Ashley Thomas <[email protected]> Acked-by: Rodrigo Siqueira <[email protected]> --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 11 ++++++++++- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 6 ++---- drivers/gpu/drm/amd/display/dc/dc_link.h | 3 +++ drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 1 + drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 1 + drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h | 1 + 6 files changed, 18 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 549bea1d725c..951b43dde4e5 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -3406,7 +3406,7 @@ uint32_t dc_link_bandwidth_kbps( link_bw_kbps *= 8; /* 8 bits per byte*/ link_bw_kbps *= link_setting->lane_count; - if (link->dpcd_caps.fec_cap.bits.FEC_CAPABLE) { + if (dc_link_is_fec_supported(link)) { /* Account for FEC overhead. * We have to do it based on caps, * and not based on FEC being set ready, @@ -3450,3 +3450,12 @@ void dc_link_overwrite_extended_receiver_cap( dp_overwrite_extended_receiver_cap(link); } +bool dc_link_is_fec_supported(const struct dc_link *link) +{ + return (dc_is_dp_signal(link->connector_signal) && + link->link_enc->features.fec_supported && + link->dpcd_caps.fec_cap.bits.FEC_CAPABLE && + !link->dc->debug.disable_fec && + !IS_FPGA_MAXIMUS_DC(link->ctx->dce_environment)); +} + diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 5aa3de9644ea..c805bec18044 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -4126,8 +4126,7 @@ void dp_set_fec_ready(struct dc_link *link, bool ready) struct link_encoder *link_enc = link->link_enc; uint8_t fec_config = 0; - if (link->dc->debug.disable_fec || - IS_FPGA_MAXIMUS_DC(link->ctx->dce_environment)) + if (!dc_link_is_fec_supported(link)) return; if (link_enc->funcs->fec_set_ready && @@ -4162,8 +4161,7 @@ void dp_set_fec_enable(struct dc_link *link, bool enable) { struct link_encoder *link_enc = link->link_enc; - if (link->dc->debug.disable_fec || - IS_FPGA_MAXIMUS_DC(link->ctx->dce_environment)) + if (!dc_link_is_fec_supported(link)) return; if (link_enc->funcs->fec_set_enable && diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index c45c7680fa58..00ff5e98278c 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -333,4 +333,7 @@ bool dc_submit_i2c_oem( uint32_t dc_bandwidth_in_kbps_from_timing( const struct dc_crtc_timing *timing); + +bool dc_link_is_fec_supported(const struct dc_link *link); + #endif /* DC_LINK_H_ */ diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c index 78971b6b195c..34483853e889 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -1143,6 +1143,7 @@ static const struct encoder_feature_support link_enc_feature = { .max_hdmi_pixel_clock = 600000, .hdmi_ycbcr420_supported = true, .dp_ycbcr420_supported = true, + .fec_supported = true, .flags.bits.IS_HBR2_CAPABLE = true, .flags.bits.IS_HBR3_CAPABLE = true, .flags.bits.IS_TPS3_CAPABLE = true, diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c index 88b51cae6178..de9047dd811d 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c @@ -1589,6 +1589,7 @@ static const struct encoder_feature_support link_enc_feature = { .max_hdmi_pixel_clock = 600000, .hdmi_ycbcr420_supported = true, .dp_ycbcr420_supported = true, + .fec_supported = true, .flags.bits.IS_HBR2_CAPABLE = true, .flags.bits.IS_HBR3_CAPABLE = true, .flags.bits.IS_TPS3_CAPABLE = true, diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h b/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h index fb748f082c56..c2b392a533b1 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/link_encoder.h @@ -68,6 +68,7 @@ struct encoder_feature_support { unsigned int max_hdmi_pixel_clock; bool hdmi_ycbcr420_supported; bool dp_ycbcr420_supported; + bool fec_supported; }; union dpcd_psr_configuration { -- 2.25.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
