diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_display.c')
-rw-r--r-- | drivers/gpu/drm/radeon/radeon_display.c | 96 |
1 files changed, 94 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index c115f2e442eb..a133b833e45d 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -560,6 +560,98 @@ void radeon_compute_pll(struct radeon_pll *pll, *post_div_p = best_post_div; } +void radeon_compute_pll_avivo(struct radeon_pll *pll, + uint64_t freq, + uint32_t *dot_clock_p, + uint32_t *fb_div_p, + uint32_t *frac_fb_div_p, + uint32_t *ref_div_p, + uint32_t *post_div_p, + int flags) +{ + fixed20_12 m, n, frac_n, p, f_vco, f_pclk, best_freq; + fixed20_12 pll_out_max, pll_out_min; + fixed20_12 pll_in_max, pll_in_min; + fixed20_12 reference_freq; + fixed20_12 error, ffreq, a, b; + + pll_out_max.full = rfixed_const(pll->pll_out_max); + pll_out_min.full = rfixed_const(pll->pll_out_min); + pll_in_max.full = rfixed_const(pll->pll_in_max); + pll_in_min.full = rfixed_const(pll->pll_in_min); + reference_freq.full = rfixed_const(pll->reference_freq); + do_div(freq, 10); + ffreq.full = rfixed_const(freq); + error.full = rfixed_const(100 * 100); + + /* max p */ + p.full = rfixed_div(pll_out_max, ffreq); + p.full = rfixed_floor(p); + + /* min m */ + m.full = rfixed_div(reference_freq, pll_in_max); + m.full = rfixed_ceil(m); + + while (1) { + n.full = rfixed_div(ffreq, reference_freq); + n.full = rfixed_mul(n, m); + n.full = rfixed_mul(n, p); + + f_vco.full = rfixed_div(n, m); + f_vco.full = rfixed_mul(f_vco, reference_freq); + + f_pclk.full = rfixed_div(f_vco, p); + + if (f_pclk.full > ffreq.full) + error.full = f_pclk.full - ffreq.full; + else + error.full = ffreq.full - f_pclk.full; + error.full = rfixed_div(error, f_pclk); + a.full = rfixed_const(100 * 100); + error.full = rfixed_mul(error, a); + + a.full = rfixed_mul(m, p); + a.full = rfixed_div(n, a); + best_freq.full = rfixed_mul(reference_freq, a); + + if (rfixed_trunc(error) < 25) + break; + + a.full = rfixed_const(1); + m.full = m.full + a.full; + a.full = rfixed_div(reference_freq, m); + if (a.full >= pll_in_min.full) + continue; + + m.full = rfixed_div(reference_freq, pll_in_max); + m.full = rfixed_ceil(m); + a.full= rfixed_const(1); + p.full = p.full - a.full; + a.full = rfixed_mul(p, ffreq); + if (a.full >= pll_out_min.full) + continue; + else { + DRM_ERROR("Unable to find pll dividers\n"); + break; + } + } + + a.full = rfixed_const(10); + b.full = rfixed_mul(n, a); + + frac_n.full = rfixed_floor(n); + frac_n.full = rfixed_mul(frac_n, a); + frac_n.full = b.full - frac_n.full; + + *dot_clock_p = rfixed_trunc(best_freq); + *fb_div_p = rfixed_trunc(n); + *frac_fb_div_p = rfixed_trunc(frac_n); + *ref_div_p = rfixed_trunc(m); + *post_div_p = rfixed_trunc(p); + + DRM_DEBUG("%u %d.%d, %d, %d\n", *dot_clock_p * 10, *fb_div_p, *frac_fb_div_p, *ref_div_p, *post_div_p); +} + static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb) { struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb); @@ -660,7 +752,7 @@ int radeon_modeset_create_props(struct radeon_device *rdev) return -ENOMEM; rdev->mode_info.coherent_mode_property->values[0] = 0; - rdev->mode_info.coherent_mode_property->values[0] = 1; + rdev->mode_info.coherent_mode_property->values[1] = 1; } if (!ASIC_IS_AVIVO(rdev)) { @@ -684,7 +776,7 @@ int radeon_modeset_create_props(struct radeon_device *rdev) if (!rdev->mode_info.load_detect_property) return -ENOMEM; rdev->mode_info.load_detect_property->values[0] = 0; - rdev->mode_info.load_detect_property->values[0] = 1; + rdev->mode_info.load_detect_property->values[1] = 1; drm_mode_create_scaling_mode_property(rdev->ddev); |