amdgpu/dc: drop display_pipe_clocks.c.

This code isn't used at all in the kernel tree, perhaps it can wait to
be imported when it is. It also does a lot of floating point calcs,
so probably good to drop it until it's needed and we can ensure
proper fpu accessors.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/Makefile

@@ -13,7 +13,7 @@ CFLAGS_dml_common_defs.o := -mhard-float -msse -mpreferred-stack-boundary=4
 CFLAGS_display_mode_support.o := -mhard-float -msse -mpreferred-stack-boundary=4
 
 
-DML = display_mode_lib.o display_pipe_clocks.o display_rq_dlg_calc.o \
+DML = display_mode_lib.o display_rq_dlg_calc.o \
 	  display_rq_dlg_helpers.o display_watermark.o \
 	  soc_bounding_box.o dml_common_defs.o display_mode_support.o
 

drivers/gpu/drm/amd/display/dc/dml/display_mode_lib.h

@@ -28,7 +28,6 @@
 #include "dml_common_defs.h"
 #include "soc_bounding_box.h"
 #include "display_watermark.h"
-#include "display_pipe_clocks.h"
 #include "display_rq_dlg_calc.h"
 #include "display_mode_support.h"
 

drivers/gpu/drm/amd/display/dc/dml/display_pipe_clocks.c

-/*
- * Copyright 2017 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: AMD
- *
- */
-
-#include "display_pipe_clocks.h"
-#include "display_mode_lib.h"
-#include "soc_bounding_box.h"
-
-static enum voltage_state power_state(
-		struct display_mode_lib *mode_lib,
-		double dispclk,
-		double dppclk)
-{
-	enum voltage_state state1;
-	enum voltage_state state2;
-
-	if (dispclk <= mode_lib->soc.vmin.dispclk_mhz)
-		state1 = dm_vmin;
-	else if (dispclk <= mode_lib->soc.vnom.dispclk_mhz)
-		state1 = dm_vnom;
-	else if (dispclk <= mode_lib->soc.vmax.dispclk_mhz)
-		state1 = dm_vmax;
-	else
-		state1 = dm_vmax_exceeded;
-
-	if (dppclk <= mode_lib->soc.vmin.dppclk_mhz)
-		state2 = dm_vmin;
-	else if (dppclk <= mode_lib->soc.vnom.dppclk_mhz)
-		state2 = dm_vnom;
-	else if (dppclk <= mode_lib->soc.vmax.dppclk_mhz)
-		state2 = dm_vmax;
-	else
-		state2 = dm_vmax_exceeded;
-
-	if (state1 > state2)
-		return state1;
-	else
-		return state2;
-}
-
-static unsigned int dpp_in_grp(
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_pipes,
-		unsigned int hsplit_grp)
-{
-	unsigned int num_dpp = 0;
-	unsigned int i;
-
-	for (i = 0; i < num_pipes; i++) {
-		if (e2e[i].pipe.src.is_hsplit) {
-			if (e2e[i].pipe.src.hsplit_grp == hsplit_grp) {
-				num_dpp++;
-			}
-		}
-	}
-
-	if (0 == num_dpp)
-		num_dpp = 1;
-
-	return num_dpp;
-}
-
-static void calculate_pipe_clk_requirement(
-		struct display_mode_lib *mode_lib,
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_dpp_in_grp,
-		double *dppclk,
-		double *dispclk,
-		bool *dppdiv)
-{
-	double pscl_throughput = 0.0;
-	double max_hratio = e2e->pipe.scale_ratio_depth.hscl_ratio;
-	double max_vratio = e2e->pipe.scale_ratio_depth.vscl_ratio;
-	double max_htaps = e2e->pipe.scale_taps.htaps;
-	double max_vtaps = e2e->pipe.scale_taps.vtaps;
-	double dpp_clock_divider = (double) num_dpp_in_grp;
-	double dispclk_dppclk_ratio;
-	double dispclk_ramp_margin_percent;
-
-	if (max_hratio > 1.0) {
-		double pscl_to_lb = ((double) mode_lib->ip.max_pscl_lb_bw_pix_per_clk * max_hratio)
-				/ dml_ceil(max_htaps / 6.0);
-		pscl_throughput = dml_min(
-				pscl_to_lb,
-				(double) mode_lib->ip.max_dchub_pscl_bw_pix_per_clk);
-	} else {
-		pscl_throughput = dml_min(
-				(double) mode_lib->ip.max_pscl_lb_bw_pix_per_clk,
-				(double) mode_lib->ip.max_dchub_pscl_bw_pix_per_clk);
-	}
-
-	DTRACE("pscl_throughput: %f pix per clk", pscl_throughput);
-	DTRACE("vtaps: %f hratio: %f vratio: %f", max_vtaps, max_hratio, max_vratio);
-	*dppclk = dml_max(
-			max_vtaps / 6.0 * dml_min(1.0, max_hratio),
-			max_hratio * max_vratio / pscl_throughput);
-	DTRACE("pixel rate multiplier: %f", *dppclk);
-	*dppclk = dml_max(*dppclk, 1.0);
-	DTRACE("pixel rate multiplier clamped: %f", *dppclk);
-	*dppclk = *dppclk * e2e->pipe.dest.pixel_rate_mhz;
-
-	*dppclk = *dppclk / dpp_clock_divider;
-	DTRACE("dppclk after split: %f", *dppclk);
-
-	if (dpp_clock_divider > 1.0 && (*dppclk < e2e->pipe.dest.pixel_rate_mhz)) {
-		dispclk_dppclk_ratio = 2.0;
-		*dppdiv = true;
-	} else {
-		dispclk_dppclk_ratio = 1.0;
-		*dppdiv = false;
-	}
-
-	dispclk_ramp_margin_percent = mode_lib->ip.dispclk_ramp_margin_percent;
-
-	/* Comment this out because of Gabes possible bug in spreadsheet,
-	 * just to make other cases evident during debug
-	 *
-	 *if(e2e->clks_cfg.voltage == dm_vmax)
-	 *    dispclk_ramp_margin_percent = 0.0;
-	 */
-
-	/* account for ramping margin and downspread */
-	*dispclk = dml_max(*dppclk * dispclk_dppclk_ratio, e2e->pipe.dest.pixel_rate_mhz)
-			* (1.0 + (double) mode_lib->soc.downspread_percent / 100.0)
-			* (1.0 + (double) dispclk_ramp_margin_percent / 100.0);
-
-	return;
-}
-
-bool dml_clks_pipe_clock_requirement_fit_power_constraint(
-		struct display_mode_lib *mode_lib,
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_dpp_in_grp)
-{
-	double dppclk = 0;
-	double dispclk = 0;
-	bool dppdiv = 0;
-
-	calculate_pipe_clk_requirement(mode_lib, e2e, num_dpp_in_grp, &dppclk, &dispclk, &dppdiv);
-
-	if (power_state(mode_lib, dispclk, dppclk) > e2e->clks_cfg.voltage) {
-		return false;
-	}
-
-	return true;
-}
-
-static void get_plane_clks(
-		struct display_mode_lib *mode_lib,
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_pipes,
-		double *dppclks,
-		double *dispclks,
-		bool *dppdiv)
-{
-	/* it is assumed that the scale ratios passed into the e2e pipe params have already been calculated
-	 * for any split pipe configurations, where extra pixels inthe overlap region do not contribute to
-	 * the scale ratio. This means that we can simply calculate the dppclk for each dpp independently
-	 * and we would expect the same result on any split pipes, which would be handled
-	 */
-	unsigned int i;
-
-	for (i = 0; i < num_pipes; i++) {
-		double num_dpp_in_grp;
-		double dispclk_ramp_margin_percent;
-		double dispclk_margined;
-
-		if (e2e[i].pipe.src.is_hsplit)
-			num_dpp_in_grp = (double) dpp_in_grp(
-					e2e,
-					num_pipes,
-					e2e[i].pipe.src.hsplit_grp);
-		else
-			num_dpp_in_grp = 1;
-
-		calculate_pipe_clk_requirement(
-				mode_lib,
-				&e2e[i],
-				num_dpp_in_grp,
-				&dppclks[i],
-				&dispclks[i],
-				&dppdiv[i]);
-
-		dispclk_ramp_margin_percent = mode_lib->ip.dispclk_ramp_margin_percent;
-
-		dispclk_margined = e2e[i].pipe.dest.pixel_rate_mhz
-				* (1.0 + (double) mode_lib->soc.downspread_percent / 100.0)
-				* (1.0 + (double) dispclk_ramp_margin_percent / 100.0);
-
-		DTRACE("p%d: requested power state: %d", i, (int) e2e[0].clks_cfg.voltage);
-
-		if (power_state(mode_lib, dispclks[i], dppclks[i])
-				> power_state(mode_lib, dispclk_margined, dispclk_margined)
-				&& dispclk_margined > dppclks[i]) {
-			if (power_state(mode_lib, dispclks[i], dppclks[i])
-					> e2e[0].clks_cfg.voltage) {
-				dispclks[i] = dispclk_margined;
-				dppclks[i] = dispclk_margined;
-				dppdiv[i] = false;
-			}
-		}
-
-		DTRACE("p%d: dispclk: %f", i, dispclks[i]);
-	}
-}
-
-static void get_dcfclk(
-		struct display_mode_lib *mode_lib,
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_pipes,
-		double *dcfclk_mhz)
-{
-	double bytes_per_pixel_det_y[DC__NUM_PIPES__MAX];
-	double bytes_per_pixel_det_c[DC__NUM_PIPES__MAX];
-	double swath_width_y[DC__NUM_PIPES__MAX];
-	unsigned int i;
-	double total_read_bandwidth_gbps = 0.0;
-
-	for (i = 0; i < num_pipes; i++) {
-		if (e2e[i].pipe.src.source_scan == dm_horz) {
-			swath_width_y[i] = e2e[i].pipe.src.viewport_width * 1.0;
-		} else {
-			swath_width_y[i] = e2e[i].pipe.src.viewport_height * 1.0;
-		}
-
-		switch (e2e[i].pipe.src.source_format) {
-		case dm_444_64:
-			bytes_per_pixel_det_y[i] = 8.0;
-			bytes_per_pixel_det_c[i] = 0.0;
-			break;
-		case dm_444_32:
-			bytes_per_pixel_det_y[i] = 4.0;
-			bytes_per_pixel_det_c[i] = 0.0;
-			break;
-		case dm_444_16:
-			bytes_per_pixel_det_y[i] = 2.0;
-			bytes_per_pixel_det_c[i] = 0.0;
-			break;
-		case dm_422_8:
-			bytes_per_pixel_det_y[i] = 2.0;
-			bytes_per_pixel_det_c[i] = 0.0;
-			break;
-		case dm_422_10:
-			bytes_per_pixel_det_y[i] = 4.0;
-			bytes_per_pixel_det_c[i] = 0.0;
-			break;
-		case dm_420_8:
-			bytes_per_pixel_det_y[i] = 1.0;
-			bytes_per_pixel_det_c[i] = 2.0;
-			break;
-		case dm_420_10:
-			bytes_per_pixel_det_y[i] = 4.0 / 3.0;
-			bytes_per_pixel_det_c[i] = 8.0 / 3.0;
-			break;
-		default:
-			BREAK_TO_DEBUGGER(); /* invalid src_format in get_dcfclk */
-		}
-	}
-
-	for (i = 0; i < num_pipes; i++) {
-		double read_bandwidth_plane_mbps = 0.0;
-		read_bandwidth_plane_mbps = (double) swath_width_y[i]
-				* ((double) bytes_per_pixel_det_y[i]
-						+ (double) bytes_per_pixel_det_c[i] / 2.0)
-				/ ((double) e2e[i].pipe.dest.htotal
-						/ (double) e2e[i].pipe.dest.pixel_rate_mhz)
-				* e2e[i].pipe.scale_ratio_depth.vscl_ratio;
-
-		if (e2e[i].pipe.src.dcc) {
-			read_bandwidth_plane_mbps += (read_bandwidth_plane_mbps / 1000.0 / 256.0);
-		}
-
-		if (e2e[i].pipe.src.vm) {
-			read_bandwidth_plane_mbps += (read_bandwidth_plane_mbps / 1000.0 / 512.0);
-		}
-
-		total_read_bandwidth_gbps = total_read_bandwidth_gbps
-				+ read_bandwidth_plane_mbps / 1000.0;
-	}
-
-	DTRACE("total bandwidth = %f gbps", total_read_bandwidth_gbps);
-
-	(*dcfclk_mhz) = (total_read_bandwidth_gbps * 1000.0) / mode_lib->soc.return_bus_width_bytes;
-
-	DTRACE(
-			"minimum theoretical dcfclk without stutter and full utilization = %f MHz",
-			(*dcfclk_mhz));
-
-}
-
-struct _vcs_dpi_display_pipe_clock_st dml_clks_get_pipe_clocks(
-		struct display_mode_lib *mode_lib,
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_pipes)
-{
-	struct _vcs_dpi_display_pipe_clock_st clocks;
-	double max_dispclk = 0.0;
-	double dcfclk;
-	double dispclks[DC__NUM_PIPES__MAX];
-	double dppclks[DC__NUM_PIPES__MAX];
-	bool dppdiv[DC__NUM_PIPES__MAX];
-	unsigned int i;
-
-	DTRACE("Calculating pipe clocks...");
-
-	/* this is the theoretical minimum, have to adjust based on valid values for soc */
-	get_dcfclk(mode_lib, e2e, num_pipes, &dcfclk);
-
-	/*    if(dcfclk > soc.vnom.dcfclk_mhz)
-	 *        dcfclk = soc.vmax.dcfclk_mhz;
-	 *    else if(dcfclk > soc.vmin.dcfclk_mhz)
-	 *        dcfclk = soc.vnom.dcfclk_mhz;
-	 *    else
-	 *        dcfclk = soc.vmin.dcfclk_mhz;
-	 */
-
-	dcfclk = dml_socbb_voltage_scaling(
-			&mode_lib->soc,
-			(enum voltage_state) e2e[0].clks_cfg.voltage).dcfclk_mhz;
-	clocks.dcfclk_mhz = dcfclk;
-
-	get_plane_clks(mode_lib, e2e, num_pipes, dppclks, dispclks, dppdiv);
-
-	for (i = 0; i < num_pipes; i++) {
-		max_dispclk = dml_max(max_dispclk, dispclks[i]);
-	}
-
-	clocks.dispclk_mhz = max_dispclk;
-	DTRACE("dispclk: %f Mhz", clocks.dispclk_mhz);
-	DTRACE("dcfclk: %f Mhz", clocks.dcfclk_mhz);
-
-	for (i = 0; i < num_pipes; i++) {
-		if (dppclks[i] * 2 < max_dispclk)
-			dppdiv[i] = 1;
-
-		if (dppdiv[i])
-			clocks.dppclk_div[i] = 1;
-		else
-			clocks.dppclk_div[i] = 0;
-
-		clocks.dppclk_mhz[i] = max_dispclk / ((dppdiv[i]) ? 2.0 : 1.0);
-		DTRACE("dppclk%d: %f Mhz", i, clocks.dppclk_mhz[i]);
-	}
-
-	return clocks;
-}

drivers/gpu/drm/amd/display/dc/dml/display_pipe_clocks.h

-/*
- * Copyright 2017 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Authors: AMD
- *
- */
-#ifndef __DISPLAY_PIPE_CLOCKS_H__
-#define __DISPLAY_PIPE_CLOCKS_H__
-
-#include "dml_common_defs.h"
-
-struct display_mode_lib;
-
-struct _vcs_dpi_display_pipe_clock_st dml_clks_get_pipe_clocks(
-		struct display_mode_lib *mode_lib,
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_pipes);
-
-bool dml_clks_pipe_clock_requirement_fit_power_constraint(
-		struct display_mode_lib *mode_lib,
-		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
-		unsigned int num_dpp_in_grp);
-#endif