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drm/i915/tgl: add support for reading the timestamp frequency

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There are no changes with respect to GEN11, which Paulo wrote.

This gets rid of the "Missing switch case in read_timestamp_frequency"
message at boot for Tiger Lake.

[ Lucas: BSpec: 10742 and 9024, but there's a mismatch on the values.
  Let's say a glitch in the spec. Tested locally and it works. ]

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190817093902.2171-3-lucas.demarchi@intel.com
This commit is contained in:
Michel Thierry 2019-08-17 02:38:24 -07:00 committed by Lucas De Marchi
parent ea6591b4da
commit 465242ee36
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_device_info.c
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@ -716,7 +716,7 @@ static u32 read_timestamp_frequency(struct drm_i915_private *dev_priv)
}
return freq;
} else if (INTEL_GEN(dev_priv) <= 11) {
} else if (INTEL_GEN(dev_priv) <= 12) {
u32 ctc_reg = I915_READ(CTC_MODE);
u32 freq = 0;