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drm/i915/cnp+: update to the new RAWCLK_FREQ recommendations

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BSpec was updated and now there's no more "subtract 1" to the
Microsecond Counter Divider field.

It seems this should help fixing some GMBUS issues. I'm not aware of
any specific open bug that could be solved by this patch.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181112232313.26373-1-paulo.r.zanoni@intel.com
This commit is contained in:
Paulo Zanoni
2018-11-12 15:23:11 -08:00
parent c1cd5b24d6
commit af4de6adb4
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/i915/intel_cdclk.c
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@@ -2660,7 +2660,7 @@ static int cnp_rawclk(struct drm_i915_private *dev_priv)
fraction = 200;
}
rawclk = CNP_RAWCLK_DIV((divider / 1000) - 1);
rawclk = CNP_RAWCLK_DIV(divider / 1000);
if (fraction)
rawclk |= CNP_RAWCLK_FRAC(DIV_ROUND_CLOSEST(1000,
fraction) - 1);
@@ -2676,12 +2676,12 @@ static int icp_rawclk(struct drm_i915_private *dev_priv)
if (I915_READ(SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) {
frequency = 24000;
divider = 23;
divider = 24;
numerator = 0;
denominator = 0;
} else {
frequency = 19200;
divider = 18;
divider = 19;
numerator = 1;
denominator = 4;
}