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drm/i915/icp: Get/set proper Raw clock frequency on ICP

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Add register definitions for setting the rawclock.
Set the numerator,denominator and divider values.

v2: Simplify the commit message. Simplify the math.
Add  register bits for numerator. (Paulo)
v3 (from Paulo): coding style bikesheds.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180111180010.24357-5-paulo.r.zanoni@intel.com
This commit is contained in:
Anusha Srivatsa
2018-01-11 16:00:06 -02:00
committed by Paulo Zanoni
parent 0b58436f2d
commit 4ef99abd07
2 changed files with 29 additions and 2 deletions
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2
drivers/gpu/drm/i915/i915_reg.h
View File

@@ -7351,6 +7351,8 @@ enum {
#define CNP_RAWCLK_DIV(div) ((div) << 16)
#define CNP_RAWCLK_FRAC_MASK (0xf << 26)
#define CNP_RAWCLK_FRAC(frac) ((frac) << 26)
#define ICP_RAWCLK_DEN(den) ((den) << 26)
#define ICP_RAWCLK_NUM(num) ((num) << 11)
#define PCH_DPLL_TMR_CFG _MMIO(0xc6208)

29
drivers/gpu/drm/i915/intel_cdclk.c
View File

@@ -2343,6 +2343,30 @@ static int cnp_rawclk(struct drm_i915_private *dev_priv)
return divider + fraction;
}
static int icp_rawclk(struct drm_i915_private *dev_priv)
{
u32 rawclk;
int divider, numerator, denominator, frequency;
if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) {
frequency = 24000;
divider = 23;
numerator = 0;
denominator = 0;
} else {
frequency = 19200;
divider = 18;
numerator = 1;
denominator = 4;
}
rawclk = CNP_RAWCLK_DIV(divider) | ICP_RAWCLK_NUM(numerator) |
ICP_RAWCLK_DEN(denominator);
I915_WRITE(PCH_RAWCLK_FREQ, rawclk);
return frequency;
}
static int pch_rawclk(struct drm_i915_private *dev_priv)
{
return (I915_READ(PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000;
@@ -2390,8 +2414,9 @@ static int g4x_hrawclk(struct drm_i915_private *dev_priv)
*/
void intel_update_rawclk(struct drm_i915_private *dev_priv)
{
if (HAS_PCH_CNP(dev_priv))
if (HAS_PCH_ICP(dev_priv))
dev_priv->rawclk_freq = icp_rawclk(dev_priv);
else if (HAS_PCH_CNP(dev_priv))
dev_priv->rawclk_freq = cnp_rawclk(dev_priv);
else if (HAS_PCH_SPLIT(dev_priv))
dev_priv->rawclk_freq = pch_rawclk(dev_priv);