Merge tag 'amd-drm-fixes-6.0-2022-08-17' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.0-2022-08-17:

amdgpu:
- Revert some DML stack changes
- Rounding fixes in KFD allocations
- atombios vram info table parsing fix
- DCN 3.1.4 fixes
- Clockgating fixes for various new IPs
- SMU 13.0.4 fixes
- DCN 3.1.4 FP fixes
- TMDS fixes for YCbCr420 4k modes
- DCN 3.2.x fixes
- USB 4 fixes
- SMU 13.0 fixes
- SMU driver unload memory leak fixes
- Display orientation fix
- Regression fix for generic fbdev conversion
- SDMA 6.x fixes
- SR-IOV fixes
- IH 6.x fixes
- Use after free fix in bo list handling
- Revert pipe1 support
- XGMI hive reset fix

amdkfd:
- Fix potential crach in kfd_create_indirect_link_prop()

Signed-off-by: Dave Airlie <[email protected]>
From: Alex Deucher <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

2 files changed, 24 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
index 6767fab55c26..352e9afb85c6 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
@@ -100,3 +100,24 @@ void convert_float_matrix(
 		matrix[i] = (uint16_t)reg_value;
 	}
 }
+
+static uint32_t find_gcd(uint32_t a, uint32_t b)
+{
+	uint32_t remainder = 0;
+	while (b != 0) {
+		remainder = a % b;
+		a = b;
+		b = remainder;
+	}
+	return a;
+}
+
+void reduce_fraction(uint32_t num, uint32_t den,
+		uint32_t *out_num, uint32_t *out_den)
+{
+	uint32_t gcd = 0;
+
+	gcd = find_gcd(num, den);
+	*out_num = num / gcd;
+	*out_den = den / gcd;
+}
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.h b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
index ade785c4fdc7..81da4e6f7a1a 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.h
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
@@ -38,6 +38,9 @@ void convert_float_matrix(
 	struct fixed31_32 *flt,
 	uint32_t buffer_size);
 
+void reduce_fraction(uint32_t num, uint32_t den,
+		uint32_t *out_num, uint32_t *out_den);
+
 static inline unsigned int log_2(unsigned int num)
 {
 	return ilog2(num);