From 465242ee36ebd5a4f31df64692c634f402c8f2d9 Mon Sep 17 00:00:00 2001
From: Michel Thierry <michel.thierry@intel.com>
Date: Sat, 17 Aug 2019 02:38:24 -0700
Subject: drm/i915/tgl: add support for reading the timestamp frequency
Git-commit: 465242ee36ebd5a4f31df64692c634f402c8f2d9
Patch-mainline: v5.4-rc1
References: bsc#1152489
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
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/intel_device_info.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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;
--
2.28.0