From: Michel Thierry <michel.thierry@intel.com>
Date: Sat, 17 Aug 2019 09:38:24 +0000 (-0700)
Subject: drm/i915/tgl: add support for reading the timestamp frequency
X-Git-Tag: v5.4-rc1~106^2~11^2~23
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=465242ee36ebd5a4f31df64692c634f402c8f2d9;p=linux.git

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

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
---

diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index 2a39b52c3582..d0ed44d33484 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -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;