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drm/radeon: add support for ASPM on evergreen asics

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Enables PCIE ASPM (Active State Power Management) on
evergreen-cayman asics.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2013-02-15 11:02:50 -05:00
parent 792edd6957
commit f52382d73e
3 changed files with 198 additions and 1 deletions
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150
drivers/gpu/drm/radeon/evergreen.c
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@@ -136,6 +136,7 @@ static u32 sumo_rlc_save_restore_register_list_size = ARRAY_SIZE(sumo_rlc_save_r
static void evergreen_gpu_init(struct radeon_device *rdev);
void evergreen_fini(struct radeon_device *rdev);
void evergreen_pcie_gen2_enable(struct radeon_device *rdev);
void evergreen_program_aspm(struct radeon_device *rdev);
extern void cayman_cp_int_cntl_setup(struct radeon_device *rdev,
int ring, u32 cp_int_cntl);
@@ -5071,6 +5072,8 @@ static int evergreen_startup(struct radeon_device *rdev)
/* enable pcie gen2 link */
evergreen_pcie_gen2_enable(rdev);
/* enable aspm */
evergreen_program_aspm(rdev);
if (ASIC_IS_DCE5(rdev)) {
if (!rdev->me_fw || !rdev->pfp_fw || !rdev->rlc_fw || !rdev->mc_fw) {
@@ -5468,3 +5471,150 @@ void evergreen_pcie_gen2_enable(struct radeon_device *rdev)
WREG32_PCIE_PORT(PCIE_LC_LINK_WIDTH_CNTL, link_width_cntl);
}
}
void evergreen_program_aspm(struct radeon_device *rdev)
{
u32 data, orig;
u32 pcie_lc_cntl, pcie_lc_cntl_old;
bool disable_l0s, disable_l1 = false, disable_plloff_in_l1 = false;
/* fusion_platform = true
* if the system is a fusion system
* (APU or DGPU in a fusion system).
* todo: check if the system is a fusion platform.
*/
bool fusion_platform = false;
if (!(rdev->flags & RADEON_IS_PCIE))
return;
switch (rdev->family) {
case CHIP_CYPRESS:
case CHIP_HEMLOCK:
case CHIP_JUNIPER:
case CHIP_REDWOOD:
case CHIP_CEDAR:
case CHIP_SUMO:
case CHIP_SUMO2:
case CHIP_PALM:
case CHIP_ARUBA:
disable_l0s = true;
break;
default:
disable_l0s = false;
break;
}
if (rdev->flags & RADEON_IS_IGP)
fusion_platform = true; /* XXX also dGPUs in a fusion system */
data = orig = RREG32_PIF_PHY0(PB0_PIF_PAIRING);
if (fusion_platform)
data &= ~MULTI_PIF;
else
data |= MULTI_PIF;
if (data != orig)
WREG32_PIF_PHY0(PB0_PIF_PAIRING, data);
data = orig = RREG32_PIF_PHY1(PB1_PIF_PAIRING);
if (fusion_platform)
data &= ~MULTI_PIF;
else
data |= MULTI_PIF;
if (data != orig)
WREG32_PIF_PHY1(PB1_PIF_PAIRING, data);
pcie_lc_cntl = pcie_lc_cntl_old = RREG32_PCIE_PORT(PCIE_LC_CNTL);
pcie_lc_cntl &= ~(LC_L0S_INACTIVITY_MASK | LC_L1_INACTIVITY_MASK);
if (!disable_l0s) {
if (rdev->family >= CHIP_BARTS)
pcie_lc_cntl |= LC_L0S_INACTIVITY(7);
else
pcie_lc_cntl |= LC_L0S_INACTIVITY(3);
}
if (!disable_l1) {
if (rdev->family >= CHIP_BARTS)
pcie_lc_cntl |= LC_L1_INACTIVITY(7);
else
pcie_lc_cntl |= LC_L1_INACTIVITY(8);
if (!disable_plloff_in_l1) {
data = orig = RREG32_PIF_PHY0(PB0_PIF_PWRDOWN_0);
data &= ~(PLL_POWER_STATE_IN_OFF_0_MASK | PLL_POWER_STATE_IN_TXS2_0_MASK);
data |= PLL_POWER_STATE_IN_OFF_0(7) | PLL_POWER_STATE_IN_TXS2_0(7);
if (data != orig)
WREG32_PIF_PHY0(PB0_PIF_PWRDOWN_0, data);
data = orig = RREG32_PIF_PHY0(PB0_PIF_PWRDOWN_1);
data &= ~(PLL_POWER_STATE_IN_OFF_1_MASK | PLL_POWER_STATE_IN_TXS2_1_MASK);
data |= PLL_POWER_STATE_IN_OFF_1(7) | PLL_POWER_STATE_IN_TXS2_1(7);
if (data != orig)
WREG32_PIF_PHY0(PB0_PIF_PWRDOWN_1, data);
data = orig = RREG32_PIF_PHY1(PB1_PIF_PWRDOWN_0);
data &= ~(PLL_POWER_STATE_IN_OFF_0_MASK | PLL_POWER_STATE_IN_TXS2_0_MASK);
data |= PLL_POWER_STATE_IN_OFF_0(7) | PLL_POWER_STATE_IN_TXS2_0(7);
if (data != orig)
WREG32_PIF_PHY1(PB1_PIF_PWRDOWN_0, data);
data = orig = RREG32_PIF_PHY1(PB1_PIF_PWRDOWN_1);
data &= ~(PLL_POWER_STATE_IN_OFF_1_MASK | PLL_POWER_STATE_IN_TXS2_1_MASK);
data |= PLL_POWER_STATE_IN_OFF_1(7) | PLL_POWER_STATE_IN_TXS2_1(7);
if (data != orig)
WREG32_PIF_PHY1(PB1_PIF_PWRDOWN_1, data);
if (rdev->family >= CHIP_BARTS) {
data = orig = RREG32_PIF_PHY0(PB0_PIF_PWRDOWN_0);
data &= ~PLL_RAMP_UP_TIME_0_MASK;
data |= PLL_RAMP_UP_TIME_0(4);
if (data != orig)
WREG32_PIF_PHY0(PB0_PIF_PWRDOWN_0, data);
data = orig = RREG32_PIF_PHY0(PB0_PIF_PWRDOWN_1);
data &= ~PLL_RAMP_UP_TIME_1_MASK;
data |= PLL_RAMP_UP_TIME_1(4);
if (data != orig)
WREG32_PIF_PHY0(PB0_PIF_PWRDOWN_1, data);
data = orig = RREG32_PIF_PHY1(PB1_PIF_PWRDOWN_0);
data &= ~PLL_RAMP_UP_TIME_0_MASK;
data |= PLL_RAMP_UP_TIME_0(4);
if (data != orig)
WREG32_PIF_PHY1(PB1_PIF_PWRDOWN_0, data);
data = orig = RREG32_PIF_PHY1(PB1_PIF_PWRDOWN_1);
data &= ~PLL_RAMP_UP_TIME_1_MASK;
data |= PLL_RAMP_UP_TIME_1(4);
if (data != orig)
WREG32_PIF_PHY1(PB1_PIF_PWRDOWN_1, data);
}
data = orig = RREG32_PCIE_PORT(PCIE_LC_LINK_WIDTH_CNTL);
data &= ~LC_DYN_LANES_PWR_STATE_MASK;
data |= LC_DYN_LANES_PWR_STATE(3);
if (data != orig)
WREG32_PCIE_PORT(PCIE_LC_LINK_WIDTH_CNTL, data);
if (rdev->family >= CHIP_BARTS) {
data = orig = RREG32_PIF_PHY0(PB0_PIF_CNTL);
data &= ~LS2_EXIT_TIME_MASK;
data |= LS2_EXIT_TIME(1);
if (data != orig)
WREG32_PIF_PHY0(PB0_PIF_CNTL, data);
data = orig = RREG32_PIF_PHY1(PB1_PIF_CNTL);
data &= ~LS2_EXIT_TIME_MASK;
data |= LS2_EXIT_TIME(1);
if (data != orig)
WREG32_PIF_PHY1(PB1_PIF_CNTL, data);
}
}
}
/* evergreen parts only */
if (rdev->family < CHIP_BARTS)
pcie_lc_cntl |= LC_PMI_TO_L1_DIS;
if (pcie_lc_cntl != pcie_lc_cntl_old)
WREG32_PCIE_PORT(PCIE_LC_CNTL, pcie_lc_cntl);
}