[PATCH 3.13 154/187] drm/radeon/atom: add new voltage fetch function for hawaii

Kamal Mostafa
2014-09-15T22:14:46Z

From: Alex Deucher <alexander.deucher@amd.com>

commit e9f274b2a1bd4ecc569b823b1e7942e9bf92593e upstream.

Some hawaii boards use a different method for fetching the
voltage information from the vbios.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
drivers/gpu/drm/radeon/radeon.h | 3 +++
drivers/gpu/drm/radeon/radeon_atombios.c | 35 ++++++++++++++++++++++++++++++++
2 files changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 68b29d9..6cc9331 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -289,6 +289,9 @@ int radeon_atom_get_leakage_vddc_based_on_leakage_params(struct radeon_device *r
u16 *vddc, u16 *vddci,
u16 virtual_voltage_id,
u16 vbios_voltage_id);
+int radeon_atom_get_voltage_evv(struct radeon_device *rdev,
+ u16 virtual_voltage_id,
+ u16 *voltage);
int radeon_atom_round_to_true_voltage(struct radeon_device *rdev,
u8 voltage_type,
u16 nominal_voltage,
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 402d463..4af5a78 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -3236,6 +3236,41 @@ int radeon_atom_get_leakage_vddc_based_on_leakage_params(struct radeon_device *r
return 0;
}

+union get_voltage_info {
+ struct _GET_VOLTAGE_INFO_INPUT_PARAMETER_V1_2 in;
+ struct _GET_EVV_VOLTAGE_INFO_OUTPUT_PARAMETER_V1_2 evv_out;
+};
+
+int radeon_atom_get_voltage_evv(struct radeon_device *rdev,
+ u16 virtual_voltage_id,
+ u16 *voltage)
+{
+ int index = GetIndexIntoMasterTable(COMMAND, GetVoltageInfo);
+ u32 entry_id;
+ u32 count = rdev->pm.dpm.dyn_state.vddc_dependency_on_sclk.count;
+ union get_voltage_info args;
+
+ for (entry_id = 0; entry_id < count; entry_id++) {
+ if (rdev->pm.dpm.dyn_state.vddc_dependency_on_sclk.entries[entry_id].v ==
+ virtual_voltage_id)
+ break;
+ }
+
+ if (entry_id >= count)
+ return -EINVAL;
+
+ args.in.ucVoltageType = VOLTAGE_TYPE_VDDC;
+ args.in.ucVoltageMode = ATOM_GET_VOLTAGE_EVV_VOLTAGE;
+ args.in.ulSCLKFreq =
+ cpu_to_le32(rdev->pm.dpm.dyn_state.vddc_dependency_on_sclk.entries[entry_id].clk);
+
+ atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+
+ *voltage = le16_to_cpu(args.evv_out.usVoltageLevel);
+
+ return 0;
+}
+
int radeon_atom_get_voltage_gpio_settings(struct radeon_device *rdev,
u16 voltage_level, u8 voltage_type,
u32 *gpio_value, u32 *gpio_mask)
--
1.9.1