diff --git a/drivers/gpu/drm/xe/regs/xe_regs.h b/drivers/gpu/drm/xe/regs/xe_regs.h
index 6cf282618836..3abb17d2ca33 100644
--- a/drivers/gpu/drm/xe/regs/xe_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_regs.h
@@ -7,10 +7,6 @@
 
 #include "regs/xe_reg_defs.h"
 
-#define TIMESTAMP_OVERRIDE					XE_REG(0x44074)
-#define   TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_MASK	REG_GENMASK(15, 12)
-#define   TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_MASK		REG_GENMASK(9, 0)
-
 #define GU_CNTL_PROTECTED			XE_REG(0x10100C)
 #define   DRIVERINT_FLR_DIS			REG_BIT(31)
 
diff --git a/drivers/gpu/drm/xe/xe_gt_clock.c b/drivers/gpu/drm/xe/xe_gt_clock.c
index cc2ae159298e..2a958c92d8ea 100644
--- a/drivers/gpu/drm/xe/xe_gt_clock.c
+++ b/drivers/gpu/drm/xe/xe_gt_clock.c
@@ -12,25 +12,10 @@
 #include "xe_assert.h"
 #include "xe_device.h"
 #include "xe_gt.h"
+#include "xe_gt_printk.h"
 #include "xe_macros.h"
 #include "xe_mmio.h"
 
-static u32 read_reference_ts_freq(struct xe_gt *gt)
-{
-	u32 ts_override = xe_mmio_read32(&gt->mmio, TIMESTAMP_OVERRIDE);
-	u32 base_freq, frac_freq;
-
-	base_freq = REG_FIELD_GET(TIMESTAMP_OVERRIDE_US_COUNTER_DIVIDER_MASK,
-				  ts_override) + 1;
-	base_freq *= 1000000;
-
-	frac_freq = REG_FIELD_GET(TIMESTAMP_OVERRIDE_US_COUNTER_DENOMINATOR_MASK,
-				  ts_override);
-	frac_freq = 1000000 / (frac_freq + 1);
-
-	return base_freq + frac_freq;
-}
-
 static u32 get_crystal_clock_freq(u32 rpm_config_reg)
 {
 	const u32 f19_2_mhz = 19200000;
@@ -57,26 +42,30 @@ static u32 get_crystal_clock_freq(u32 rpm_config_reg)
 
 int xe_gt_clock_init(struct xe_gt *gt)
 {
-	u32 ctc_reg = xe_mmio_read32(&gt->mmio, CTC_MODE);
+	u32 c0 = xe_mmio_read32(&gt->mmio, RPM_CONFIG0);
 	u32 freq = 0;
 
-	/* Assuming gen11+ so assert this assumption is correct */
-	xe_gt_assert(gt, GRAPHICS_VER(gt_to_xe(gt)) >= 11);
+	/*
+	 * CTC_MODE[0] = 1 is definitely not supported for Xe2 and later
+	 * platforms.  In theory it could be a valid setting for pre-Xe2
+	 * platforms, but there's no documentation on how to properly handle
+	 * this case.  Reading TIMESTAMP_OVERRIDE, as the driver attempted in
+	 * the past has been confirmed as incorrect by the hardware architects.
+	 *
+	 * For now just warn if we ever encounter hardware in the wild that
+	 * has this setting and move on as if it hadn't been set.
+	 */
+	if (xe_mmio_read32(&gt->mmio, CTC_MODE) & CTC_SOURCE_DIVIDE_LOGIC)
+		xe_gt_warn(gt, "CTC_MODE[0] is set; this is unexpected and undocumented\n");
 
-	if (ctc_reg & CTC_SOURCE_DIVIDE_LOGIC) {
-		freq = read_reference_ts_freq(gt);
-	} else {
-		u32 c0 = xe_mmio_read32(&gt->mmio, RPM_CONFIG0);
+	freq = get_crystal_clock_freq(c0);
 
-		freq = get_crystal_clock_freq(c0);
-
-		/*
-		 * Now figure out how the command stream's timestamp
-		 * register increments from this frequency (it might
-		 * increment only every few clock cycle).
-		 */
-		freq >>= 3 - REG_FIELD_GET(RPM_CONFIG0_CTC_SHIFT_PARAMETER_MASK, c0);
-	}
+	/*
+	 * Now figure out how the command stream's timestamp
+	 * register increments from this frequency (it might
+	 * increment only every few clock cycle).
+	 */
+	freq >>= 3 - REG_FIELD_GET(RPM_CONFIG0_CTC_SHIFT_PARAMETER_MASK, c0);
 
 	gt->info.reference_clock = freq;
 	return 0;
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_service.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_service.c
index 6b5f849a0722..4efde5f46b43 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_service.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_service.c
@@ -114,7 +114,6 @@ static const struct xe_reg tgl_runtime_regs[] = {
 	GT_VEBOX_VDBOX_DISABLE,		/* _MMIO(0x9140) */
 	CTC_MODE,			/* _MMIO(0xa26c) */
 	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
-	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
 };
 
 static const struct xe_reg ats_m_runtime_regs[] = {
@@ -127,7 +126,6 @@ static const struct xe_reg ats_m_runtime_regs[] = {
 	XEHP_GT_COMPUTE_DSS_ENABLE,	/* _MMIO(0x9144) */
 	CTC_MODE,			/* _MMIO(0xa26c) */
 	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
-	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
 };
 
 static const struct xe_reg pvc_runtime_regs[] = {
@@ -140,7 +138,6 @@ static const struct xe_reg pvc_runtime_regs[] = {
 	XEHPC_GT_COMPUTE_DSS_ENABLE_EXT,/* _MMIO(0x9148) */
 	CTC_MODE,			/* _MMIO(0xA26C) */
 	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
-	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
 };
 
 static const struct xe_reg ver_1270_runtime_regs[] = {
@@ -155,7 +152,6 @@ static const struct xe_reg ver_1270_runtime_regs[] = {
 	XEHPC_GT_COMPUTE_DSS_ENABLE_EXT,/* _MMIO(0x9148) */
 	CTC_MODE,			/* _MMIO(0xa26c) */
 	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
-	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
 };
 
 static const struct xe_reg ver_2000_runtime_regs[] = {
@@ -173,7 +169,6 @@ static const struct xe_reg ver_2000_runtime_regs[] = {
 	XE2_GT_GEOMETRY_DSS_2,		/* _MMIO(0x9154) */
 	CTC_MODE,			/* _MMIO(0xa26c) */
 	HUC_KERNEL_LOAD_INFO,		/* _MMIO(0xc1dc) */
-	TIMESTAMP_OVERRIDE,		/* _MMIO(0x44074) */
 };
 
 static const struct xe_reg ver_3000_runtime_regs[] = {