drm/radeon/dpm/cayman: use new fixed point functions (v2) (b253e4b3) · Commits · 戴 / test

drivers/gpu/drm/radeon/ni_dpm.c

+11 −35

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@
		#include "r600_dpm.h"
		#include "ni_dpm.h"
		#include "atom.h"
		#include <linux/math64.h>

		#define MC_CG_ARB_FREQ_F0 0x0a
		#define MC_CG_ARB_FREQ_F1 0x0b
		@@ -732,50 +733,25 @@ struct ni_ps ni_get_ps(struct radeon_ps rps)
		return ps;
		}

		/* XXX: fix for kernel use */
		#if 0
		static double ni_exp(double x)
		{
		int count = 1;
		double sum = 1.0, term, tolerance = 0.000000001, y = x;

		if (x < 0)
		y = -1 * x;
		term = y;

		while (term >= tolerance) {
		sum = sum + term;
		count = count + 1;
		term = term * (y / count);
		}

		if (x < 0)
		sum = 1.0 / sum;

		return sum;
		}
		#endif

		static void ni_calculate_leakage_for_v_and_t_formula(const struct ni_leakage_coeffients *coeff,
		u16 v, s32 t,
		u32 ileakage,
		u32 *leakage)
		{
		/* XXX: fix for kernel use */
		#if 0
		double kt, kv, leakage_w, i_leakage, vddc, temperature;
		s64 kt, kv, leakage_w, i_leakage, vddc, temperature;

		i_leakage = ((double)ileakage) / 1000;
		vddc = ((double)v) / 1000;
		temperature = ((double)t) / 1000;
		i_leakage = div64_s64(drm_int2fixp(ileakage), 1000);
		vddc = div64_s64(drm_int2fixp(v), 1000);
		temperature = div64_s64(drm_int2fixp(t), 1000);

		kt = (((double)(coeff->at)) / 1000) * ni_exp((((double)(coeff->bt)) / 1000) * temperature);
		kv = (((double)(coeff->av)) / 1000) * ni_exp((((double)(coeff->bv)) / 1000) * vddc);
		kt = drm_fixp_mul(div64_s64(drm_int2fixp(coeff->at), 1000),
		drm_fixp_exp(drm_fixp_mul(div64_s64(drm_int2fixp(coeff->bt), 1000), temperature)));
		kv = drm_fixp_mul(div64_s64(drm_int2fixp(coeff->av), 1000),
		drm_fixp_exp(drm_fixp_mul(div64_s64(drm_int2fixp(coeff->bv), 1000), vddc)));

		leakage_w = i_leakage * kt * kv * vddc;
		leakage_w = drm_fixp_mul(drm_fixp_mul(drm_fixp_mul(i_leakage, kt), kv), vddc);

		leakage = (u32)(leakage_w 1000);
		#endif
		leakage = drm_fixp2int(leakage_w 1000);
		}

		static void ni_calculate_leakage_for_v_and_t(struct radeon_device *rdev,

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