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Commit af4de6ad authored by Paulo Zanoni's avatar Paulo Zanoni
Browse files

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



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: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181112232313.26373-1-paulo.r.zanoni@intel.com
parent c1cd5b24

drivers/gpu/drm/i915/intel_cdclk.c

+3 −3
Original line number Diff line number Diff line
@@ -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;

	}