drm/radeon/kms: add dpm support for cayman (v5)

This adds dpm support for cayman asics.  This includes:
- clockgating
- dynamic engine clock scaling
- dynamic memory clock scaling
- dynamic voltage scaling
- dynamic pcie gen1/gen2 switching (requires additional acpi support)
- power containment
- shader power scaling

Set radeon.dpm=1 to enable.

v2: fold in tdp fix
v3: fix indentation
v4: fix 64 bit div
v5: attempt to fix state enable

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/gpu/drm/radeon/cypress_dpm.c b/drivers/gpu/drm/radeon/cypress_dpm.c
index ce7961935a88..afdb7c7d4e86 100644
--- a/drivers/gpu/drm/radeon/cypress_dpm.c
+++ b/drivers/gpu/drm/radeon/cypress_dpm.c
@@ -45,9 +45,6 @@ struct rv7xx_ps *rv770_get_ps(struct radeon_ps *rps);
 struct rv7xx_power_info *rv770_get_pi(struct radeon_device *rdev);
 struct evergreen_power_info *evergreen_get_pi(struct radeon_device *rdev);
 
-static u8 cypress_get_mclk_frequency_ratio(struct radeon_device *rdev,
-					   u32 memory_clock, bool strobe_mode);
-
 static void cypress_enable_bif_dynamic_pcie_gen2(struct radeon_device *rdev,
 						 bool enable)
 {
@@ -416,7 +413,7 @@ static int cypress_populate_voltage_value(struct radeon_device *rdev,
 	return 0;
 }
 
-static u8 cypress_get_strobe_mode_settings(struct radeon_device *rdev, u32 mclk)
+u8 cypress_get_strobe_mode_settings(struct radeon_device *rdev, u32 mclk)
 {
 	struct rv7xx_power_info *pi = rv770_get_pi(rdev);
 	u8 result = 0;
@@ -434,7 +431,7 @@ static u8 cypress_get_strobe_mode_settings(struct radeon_device *rdev, u32 mclk)
 	return result;
 }
 
-static u32 cypress_map_clkf_to_ibias(struct radeon_device *rdev, u32 clkf)
+u32 cypress_map_clkf_to_ibias(struct radeon_device *rdev, u32 clkf)
 {
 	u32 ref_clk = rdev->clock.mpll.reference_freq;
 	u32 vco = clkf * ref_clk;
@@ -603,8 +600,8 @@ static int cypress_populate_mclk_value(struct radeon_device *rdev,
 	return 0;
 }
 
-static u8 cypress_get_mclk_frequency_ratio(struct radeon_device *rdev,
-					   u32 memory_clock, bool strobe_mode)
+u8 cypress_get_mclk_frequency_ratio(struct radeon_device *rdev,
+				    u32 memory_clock, bool strobe_mode)
 {
 	u8 mc_para_index;