iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/i915/mtl: Fix rawclk for Meteorlake PCH

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

Bspec: 49304

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220818234202.451742-13-radhakrishna.sripada@intel.com
This commit is contained in:
Clint Taylor 2022-08-18 16:41:53 -07:00 committed by Radhakrishna Sripada
parent 61c8657822
commit dc35583ba9
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/display/intel_cdclk.c
View File

@ -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))