Commit dc35583b authored by Clint Taylor's avatar Clint Taylor Committed by Radhakrishna Sripada
Browse files

drm/i915/mtl: Fix rawclk for Meteorlake PCH 



MTL has a fixed rawclk of 38400Khz. Register does not need to be
reprogrammed.

Bspec: 49304

Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Signed-off-by: default avatarClint Taylor <clinton.a.taylor@intel.com>
Signed-off-by: default avatarRadhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220818234202.451742-13-radhakrishna.sripada@intel.com
parent 61c86578

drivers/gpu/drm/i915/display/intel_cdclk.c

+7 −0
Original line number Diff line number Diff line
@@ -3036,6 +3036,13 @@ u32 intel_read_rawclk(struct drm_i915_private *dev_priv) 


	if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1)

		freq = dg1_rawclk(dev_priv);

	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_MTP)

		/*

		 * MTL always uses a 38.4 MHz rawclk.  The bspec tells us

		 * "RAWCLK_FREQ defaults to the values for 38.4 and does

		 * not need to be programmed."

		 */

		freq = 38400;

	else if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)

		freq = cnp_rawclk(dev_priv);

	else if (HAS_PCH_SPLIT(dev_priv))