amd/amdgpu/amdgpu_dce_v10_0.c

670  * Used for display watermark bandwidth calculations
702 	u32 yclk;          /* bandwidth per dram data pin in kHz */
717  * dce_v10_0_dram_bandwidth - get the dram bandwidth
721  * Calculate the raw dram bandwidth (CIK).
722  * Used for display watermark bandwidth calculations
723  * Returns the dram bandwidth in MBytes/s
729 	fixed20_12 yclk, dram_channels, bandwidth;
739 	bandwidth.full = dfixed_mul(dram_channels, yclk);
740 	bandwidth.full = dfixed_mul(bandwidth, dram_efficiency);
742 	return dfixed_trunc(bandwidth);
746  * dce_v10_0_dram_bandwidth_for_display - get the dram bandwidth for display
750  * Calculate the dram bandwidth used for display (CIK).
751  * Used for display watermark bandwidth calculations
752  * Returns the dram bandwidth for display in MBytes/s
758 	fixed20_12 yclk, dram_channels, bandwidth;
768 	bandwidth.full = dfixed_mul(dram_channels, yclk);
769 	bandwidth.full = dfixed_mul(bandwidth, disp_dram_allocation);
771 	return dfixed_trunc(bandwidth);
775  * dce_v10_0_data_return_bandwidth - get the data return bandwidth
779  * Calculate the data return bandwidth used for display (CIK).
780  * Used for display watermark bandwidth calculations
781  * Returns the data return bandwidth in MBytes/s
787 	fixed20_12 sclk, bandwidth;
797 	bandwidth.full = dfixed_mul(a, sclk);
798 	bandwidth.full = dfixed_mul(bandwidth, return_efficiency);
800 	return dfixed_trunc(bandwidth);
804  * dce_v10_0_dmif_request_bandwidth - get the dmif bandwidth
808  * Calculate the dmif bandwidth used for display (CIK).
809  * Used for display watermark bandwidth calculations
810  * Returns the dmif bandwidth in MBytes/s
816 	fixed20_12 disp_clk, bandwidth;
829 	bandwidth.full = dfixed_mul(b, disp_clk_request_efficiency);
831 	return dfixed_trunc(bandwidth);
835  * dce_v10_0_available_bandwidth - get the min available bandwidth
839  * Calculate the min available bandwidth used for display (CIK).
840  * Used for display watermark bandwidth calculations
841  * Returns the min available bandwidth in MBytes/s
845 	/* Calculate the Available bandwidth. Display can use this temporarily but not in average. */
854  * dce_v10_0_average_bandwidth - get the average available bandwidth
858  * Calculate the average available bandwidth used for display (CIK).
859  * Used for display watermark bandwidth calculations
860  * Returns the average available bandwidth in MBytes/s
871 	fixed20_12 bandwidth;
879 	bandwidth.full = dfixed_mul(src_width, bpp);
880 	bandwidth.full = dfixed_mul(bandwidth, wm->vsc);
881 	bandwidth.full = dfixed_div(bandwidth, line_time);
883 	return dfixed_trunc(bandwidth);
892  * Used for display watermark bandwidth calculations
947  * average and available dram bandwidth
951  * Check if the display average bandwidth fits in the display
952  * dram bandwidth (CIK).
953  * Used for display watermark bandwidth calculations
967  * average and available bandwidth
971  * Check if the display average bandwidth fits in the display
972  * available bandwidth (CIK).
973  * Used for display watermark bandwidth calculations
991  * Used for display watermark bandwidth calculations