From 6988176195450da9033a0f0f21eafc6ae0a7a6a4 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Thu, 18 Sep 2008 16:42:22 -0400 Subject: radeon: Add functions to set mem/eng clocks --- linux-core/radeon_display.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) (limited to 'linux-core/radeon_display.c') diff --git a/linux-core/radeon_display.c b/linux-core/radeon_display.c index 74037191..fd0855e5 100644 --- a/linux-core/radeon_display.c +++ b/linux-core/radeon_display.c @@ -543,6 +543,51 @@ void radeon_get_clock_info(struct drm_device *dev) } +/* not sure of the best place for these */ +/* 10 khz */ +void radeon_legacy_set_engine_clock(struct drm_device *dev, int eng_clock) +{ + struct drm_radeon_private *dev_priv = dev->dev_private; + struct radeon_mode_info *mode_info = &dev_priv->mode_info; + struct radeon_pll *spll = &mode_info->spll; + uint32_t ref_div, fb_div; + uint32_t m_spll_ref_fb_div; + + /* FIXME wait for idle */ + + m_spll_ref_fb_div = RADEON_READ_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV); + m_spll_ref_fb_div &= ((RADEON_M_SPLL_REF_DIV_MASK << RADEON_M_SPLL_REF_DIV_SHIFT) | + (RADEON_MPLL_FB_DIV_MASK << RADEON_MPLL_FB_DIV_SHIFT)); + ref_div = m_spll_ref_fb_div & RADEON_M_SPLL_REF_DIV_MASK; + + fb_div = radeon_div(eng_clock * ref_div, spll->reference_freq); + m_spll_ref_fb_div |= (fb_div & RADEON_SPLL_FB_DIV_MASK) << RADEON_SPLL_FB_DIV_SHIFT; + RADEON_WRITE_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV, m_spll_ref_fb_div); + +} + +/* 10 khz */ +void radeon_legacy_set_memory_clock(struct drm_device *dev, int mem_clock) +{ + struct drm_radeon_private *dev_priv = dev->dev_private; + struct radeon_mode_info *mode_info = &dev_priv->mode_info; + struct radeon_pll *mpll = &mode_info->mpll; + uint32_t ref_div, fb_div; + uint32_t m_spll_ref_fb_div; + + /* FIXME wait for idle */ + + m_spll_ref_fb_div = RADEON_READ_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV); + m_spll_ref_fb_div &= ((RADEON_M_SPLL_REF_DIV_MASK << RADEON_M_SPLL_REF_DIV_SHIFT) | + (RADEON_SPLL_FB_DIV_MASK << RADEON_SPLL_FB_DIV_SHIFT)); + ref_div = m_spll_ref_fb_div & RADEON_M_SPLL_REF_DIV_MASK; + + fb_div = radeon_div(mem_clock * ref_div, mpll->reference_freq); + m_spll_ref_fb_div |= (fb_div & RADEON_MPLL_FB_DIV_MASK) << RADEON_MPLL_FB_DIV_SHIFT; + RADEON_WRITE_PLL(dev_priv, RADEON_M_SPLL_REF_FB_DIV, m_spll_ref_fb_div); + +} + static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb) { struct radeon_framebuffer *radeon_fb = to_radeon_framebuffer(fb); -- cgit v1.2.3