Commit 70b23a98 authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Daniel Vetter

drm/i915/chv: Add DPLL state readout support

Add chv_crtc_clock_get() to read out the DPLL settings.
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarImre Deak <imre.deak@intel.com>
[danvet: Fix compile due to bikeshedded headers in an earlier patch.]
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 44f37d1f
......@@ -6004,6 +6004,36 @@ static void i9xx_get_plane_config(struct intel_crtc *crtc,
}
static void chv_crtc_clock_get(struct intel_crtc *crtc,
struct intel_crtc_config *pipe_config)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
int pipe = pipe_config->cpu_transcoder;
enum dpio_channel port = vlv_pipe_to_channel(pipe);
intel_clock_t clock;
u32 cmn_dw13, pll_dw0, pll_dw1, pll_dw2;
int refclk = 100000;
mutex_lock(&dev_priv->dpio_lock);
cmn_dw13 = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW13(port));
pll_dw0 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW0(port));
pll_dw1 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW1(port));
pll_dw2 = vlv_dpio_read(dev_priv, pipe, CHV_PLL_DW2(port));
mutex_unlock(&dev_priv->dpio_lock);
clock.m1 = (pll_dw1 & 0x7) == DPIO_CHV_M1_DIV_BY_2 ? 2 : 0;
clock.m2 = ((pll_dw0 & 0xff) << 22) | (pll_dw2 & 0x3fffff);
clock.n = (pll_dw1 >> DPIO_CHV_N_DIV_SHIFT) & 0xf;
clock.p1 = (cmn_dw13 >> DPIO_CHV_P1_DIV_SHIFT) & 0x7;
clock.p2 = (cmn_dw13 >> DPIO_CHV_P2_DIV_SHIFT) & 0x1f;
chv_clock(refclk, &clock);
/* clock.dot is the fast clock */
pipe_config->port_clock = clock.dot / 5;
}
static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
struct intel_crtc_config *pipe_config)
{
......@@ -6073,7 +6103,9 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
DPLL_PORTB_READY_MASK);
}
if (IS_VALLEYVIEW(dev))
if (IS_CHERRYVIEW(dev))
chv_crtc_clock_get(crtc, pipe_config);
else if (IS_VALLEYVIEW(dev))
vlv_crtc_clock_get(crtc, pipe_config);
else
i9xx_crtc_clock_get(crtc, pipe_config);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment