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drm/radeon/dpm: implement force performance levels for rs780 (v2)

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Allows you to limit the selected power levels via sysfs.

Force the feedback divider to select a power level.

v2: fix checking in rs780_force_fbdiv,
    drop a duplicate divider structure in rs780_dpm_force_performance_level,
    Force the voltage level too.

Signed-off-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Anthoine Bourgeois 2013-09-03 13:52:19 -04:00 committed by Alex Deucher
parent 811e4d58ed
commit 63580c3e48
3 changed files with 77 additions and 15 deletions
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1
drivers/gpu/drm/radeon/radeon_asic.c
View file

@ -1141,6 +1141,7 @@ static struct radeon_asic rs780_asic = {
.get_mclk = &rs780_dpm_get_mclk,
.print_power_state = &rs780_dpm_print_power_state,
.debugfs_print_current_performance_level = &rs780_dpm_debugfs_print_current_performance_level,
.force_performance_level = &rs780_dpm_force_performance_level,
},
.pflip = {
.pre_page_flip = &rs600_pre_page_flip,

2
drivers/gpu/drm/radeon/radeon_asic.h
View file

@ -428,6 +428,8 @@ void rs780_dpm_print_power_state(struct radeon_device *rdev,
struct radeon_ps *ps);
void rs780_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
struct seq_file *m);
int rs780_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level);
/*
* rv770,rv730,rv710,rv740

89
drivers/gpu/drm/radeon/rs780_dpm.c
View file

@ -376,9 +376,8 @@ static void rs780_disable_vbios_powersaving(struct radeon_device *rdev)
WREG32_P(CG_INTGFX_MISC, 0, ~0xFFF00000);
}
static void rs780_force_voltage_to_high(struct radeon_device *rdev)
static void rs780_force_voltage(struct radeon_device *rdev, u16 voltage)
{
struct igp_power_info *pi = rs780_get_pi(rdev);
struct igp_ps *current_state = rs780_get_ps(rdev->pm.dpm.current_ps);
if ((current_state->max_voltage == RS780_VDDC_LEVEL_HIGH) &&
@ -390,7 +389,7 @@ static void rs780_force_voltage_to_high(struct radeon_device *rdev)
udelay(1);
WREG32_P(FVTHROT_PWM_CTRL_REG0,
STARTING_PWM_HIGHTIME(pi->max_voltage),
STARTING_PWM_HIGHTIME(voltage),
~STARTING_PWM_HIGHTIME_MASK);
WREG32_P(FVTHROT_PWM_CTRL_REG0,
@ -404,6 +403,26 @@ static void rs780_force_voltage_to_high(struct radeon_device *rdev)
WREG32_P(GFX_MACRO_BYPASS_CNTL, 0, ~SPLL_BYPASS_CNTL);
}
static void rs780_force_fbdiv(struct radeon_device *rdev, u32 fb_div)
{
struct igp_ps *current_state = rs780_get_ps(rdev->pm.dpm.current_ps);
if (current_state->sclk_low == current_state->sclk_high)
return;
WREG32_P(GFX_MACRO_BYPASS_CNTL, SPLL_BYPASS_CNTL, ~SPLL_BYPASS_CNTL);
WREG32_P(FVTHROT_FBDIV_REG2, FORCED_FEEDBACK_DIV(fb_div),
~FORCED_FEEDBACK_DIV_MASK);
WREG32_P(FVTHROT_FBDIV_REG1, STARTING_FEEDBACK_DIV(fb_div),
~STARTING_FEEDBACK_DIV_MASK);
WREG32_P(FVTHROT_FBDIV_REG1, FORCE_FEEDBACK_DIV, ~FORCE_FEEDBACK_DIV);
udelay(100);
WREG32_P(GFX_MACRO_BYPASS_CNTL, 0, ~SPLL_BYPASS_CNTL);
}
static int rs780_set_engine_clock_scaling(struct radeon_device *rdev,
struct radeon_ps *new_ps,
struct radeon_ps *old_ps)
@ -432,17 +451,7 @@ static int rs780_set_engine_clock_scaling(struct radeon_device *rdev,
if (ret)
return ret;
WREG32_P(GFX_MACRO_BYPASS_CNTL, SPLL_BYPASS_CNTL, ~SPLL_BYPASS_CNTL);
WREG32_P(FVTHROT_FBDIV_REG2, FORCED_FEEDBACK_DIV(max_dividers.fb_div),
~FORCED_FEEDBACK_DIV_MASK);
WREG32_P(FVTHROT_FBDIV_REG1, STARTING_FEEDBACK_DIV(max_dividers.fb_div),
~STARTING_FEEDBACK_DIV_MASK);
WREG32_P(FVTHROT_FBDIV_REG1, FORCE_FEEDBACK_DIV, ~FORCE_FEEDBACK_DIV);
udelay(100);
WREG32_P(GFX_MACRO_BYPASS_CNTL, 0, ~SPLL_BYPASS_CNTL);
rs780_force_fbdiv(rdev, max_dividers.fb_div);
if (max_dividers.fb_div > min_dividers.fb_div) {
WREG32_P(FVTHROT_FBDIV_REG0,
@ -649,7 +658,7 @@ int rs780_dpm_set_power_state(struct radeon_device *rdev)
rs780_set_uvd_clock_before_set_eng_clock(rdev, new_ps, old_ps);
if (pi->voltage_control) {
rs780_force_voltage_to_high(rdev);
rs780_force_voltage(rdev, pi->max_voltage);
mdelay(5);
}
@ -986,3 +995,53 @@ void rs780_dpm_debugfs_print_current_performance_level(struct radeon_device *rde
seq_printf(m, "power level 1 sclk: %u vddc_index: %d\n",
ps->sclk_high, ps->max_voltage);
}
int rs780_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level)
{
struct igp_power_info *pi = rs780_get_pi(rdev);
struct radeon_ps *rps = rdev->pm.dpm.current_ps;
struct igp_ps *ps = rs780_get_ps(rps);
struct atom_clock_dividers dividers;
int ret;
rs780_clk_scaling_enable(rdev, false);
rs780_voltage_scaling_enable(rdev, false);
if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
if (pi->voltage_control)
rs780_force_voltage(rdev, pi->max_voltage);
ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
ps->sclk_high, false, &dividers);
if (ret)
return ret;
rs780_force_fbdiv(rdev, dividers.fb_div);
} else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
ps->sclk_low, false, &dividers);
if (ret)
return ret;
rs780_force_fbdiv(rdev, dividers.fb_div);
if (pi->voltage_control)
rs780_force_voltage(rdev, pi->min_voltage);
} else {
if (pi->voltage_control)
rs780_force_voltage(rdev, pi->max_voltage);
WREG32_P(FVTHROT_FBDIV_REG1, 0, ~FORCE_FEEDBACK_DIV);
rs780_clk_scaling_enable(rdev, true);
if (pi->voltage_control) {
rs780_voltage_scaling_enable(rdev, true);
rs780_enable_voltage_scaling(rdev, rps);
}
}
rdev->pm.dpm.forced_level = level;
return 0;
}