drm/i915: Stop claiming cs timestamp frquency on gen2/3

vsyrjala · vsyrjala · commit 78e418d0ea7f · 2022-11-02T08:53:47.000+02:00
Gen2/3 have no TIMESTAMP registers to sample so no point in thinking we have any frequency for it either. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221031135703.14670-3-ville.syrjala@linux.intel.com Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c b/drivers/gpu/drm/i915/gt/intel_gt_clock_utils.c
@@ -139,7 +139,7 @@ static u32 g4x_read_clock_frequency(struct intel_uncore *uncore)
 	return 1000000000 / 1024;
 }
 
-static u32 gen2_read_clock_frequency(struct intel_uncore *uncore)
+static u32 gen4_read_clock_frequency(struct intel_uncore *uncore)
 {
 	/*
 	 * PRMs say:
@@ -163,8 +163,10 @@ static u32 read_clock_frequency(struct intel_uncore *uncore)
 		return gen5_read_clock_frequency(uncore);
 	else if (IS_G4X(uncore->i915))
 		return g4x_read_clock_frequency(uncore);
+	else if (GRAPHICS_VER(uncore->i915) == 4)
+		return gen4_read_clock_frequency(uncore);
 	else
-		return gen2_read_clock_frequency(uncore);
+		return 0;
 }
 
 void intel_gt_init_clock_frequency(struct intel_gt *gt)

Original file line number	Diff line number	Diff line change
`@@ -139,7 +139,7 @@ static u32 g4x_read_clock_frequency(struct intel_uncore *uncore)`
`139`	`139`	`return 1000000000 / 1024;`
`140`	`140`	`}`
`141`	`141`
`142`		`-static u32 gen2_read_clock_frequency(struct intel_uncore *uncore)`
	`142`	`+static u32 gen4_read_clock_frequency(struct intel_uncore *uncore)`
`143`	`143`	`{`
`144`	`144`	`/*`
`145`	`145`	`* PRMs say:`
`@@ -163,8 +163,10 @@ static u32 read_clock_frequency(struct intel_uncore *uncore)`
`163`	`163`	`return gen5_read_clock_frequency(uncore);`
`164`	`164`	`else if (IS_G4X(uncore->i915))`
`165`	`165`	`return g4x_read_clock_frequency(uncore);`
	`166`	`+ else if (GRAPHICS_VER(uncore->i915) == 4)`
	`167`	`+ return gen4_read_clock_frequency(uncore);`
`166`	`168`	`else`
`167`		`- return gen2_read_clock_frequency(uncore);`
	`169`	`+ return 0;`
`168`	`170`	`}`
`169`	`171`
`170`	`172`	`void intel_gt_init_clock_frequency(struct intel_gt *gt)`