amd/amdgpu/amdgpu_dce_v11_0.c

696  * Used for display watermark bandwidth calculations
728 	u32 yclk;          /* bandwidth per dram data pin in kHz */
743  * dce_v11_0_dram_bandwidth - get the dram bandwidth
747  * Calculate the raw dram bandwidth (CIK).
748  * Used for display watermark bandwidth calculations
749  * Returns the dram bandwidth in MBytes/s
755 	fixed20_12 yclk, dram_channels, bandwidth;
765 	bandwidth.full = dfixed_mul(dram_channels, yclk);
766 	bandwidth.full = dfixed_mul(bandwidth, dram_efficiency);
768 	return dfixed_trunc(bandwidth);
772  * dce_v11_0_dram_bandwidth_for_display - get the dram bandwidth for display
776  * Calculate the dram bandwidth used for display (CIK).
777  * Used for display watermark bandwidth calculations
778  * Returns the dram bandwidth for display in MBytes/s
784 	fixed20_12 yclk, dram_channels, bandwidth;
794 	bandwidth.full = dfixed_mul(dram_channels, yclk);
795 	bandwidth.full = dfixed_mul(bandwidth, disp_dram_allocation);
797 	return dfixed_trunc(bandwidth);
801  * dce_v11_0_data_return_bandwidth - get the data return bandwidth
805  * Calculate the data return bandwidth used for display (CIK).
806  * Used for display watermark bandwidth calculations
807  * Returns the data return bandwidth in MBytes/s
813 	fixed20_12 sclk, bandwidth;
823 	bandwidth.full = dfixed_mul(a, sclk);
824 	bandwidth.full = dfixed_mul(bandwidth, return_efficiency);
826 	return dfixed_trunc(bandwidth);
830  * dce_v11_0_dmif_request_bandwidth - get the dmif bandwidth
834  * Calculate the dmif bandwidth used for display (CIK).
835  * Used for display watermark bandwidth calculations
836  * Returns the dmif bandwidth in MBytes/s
842 	fixed20_12 disp_clk, bandwidth;
855 	bandwidth.full = dfixed_mul(b, disp_clk_request_efficiency);
857 	return dfixed_trunc(bandwidth);
861  * dce_v11_0_available_bandwidth - get the min available bandwidth
865  * Calculate the min available bandwidth used for display (CIK).
866  * Used for display watermark bandwidth calculations
867  * Returns the min available bandwidth in MBytes/s
871 	/* Calculate the Available bandwidth. Display can use this temporarily but not in average. */
880  * dce_v11_0_average_bandwidth - get the average available bandwidth
884  * Calculate the average available bandwidth used for display (CIK).
885  * Used for display watermark bandwidth calculations
886  * Returns the average available bandwidth in MBytes/s
897 	fixed20_12 bandwidth;
905 	bandwidth.full = dfixed_mul(src_width, bpp);
906 	bandwidth.full = dfixed_mul(bandwidth, wm->vsc);
907 	bandwidth.full = dfixed_div(bandwidth, line_time);
909 	return dfixed_trunc(bandwidth);
918  * Used for display watermark bandwidth calculations
973  * average and available dram bandwidth
977  * Check if the display average bandwidth fits in the display
978  * dram bandwidth (CIK).
979  * Used for display watermark bandwidth calculations
993  * average and available bandwidth
997  * Check if the display average bandwidth fits in the display
998  * available bandwidth (CIK).
999  * Used for display watermark bandwidth calculations
1017  * Used for display watermark bandwidth calculations