diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2012-03-20 22:18:03 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-03-21 07:55:51 +0100 |
| commit | fef9f91fecf3a767d74823347284e1c0e7b4b849 (patch) | |
| tree | afd8a8785f6b504b64b5eeb7a7b2fcb06050cc3f /drivers | |
| parent | drm/radeon/kms/atom: DCE6 no longer has crtcmemreq bits (diff) | |
| download | linux-fef9f91fecf3a767d74823347284e1c0e7b4b849.tar.xz linux-fef9f91fecf3a767d74823347284e1c0e7b4b849.zip | |
drm/radeon/kms/atom: add support for crtc power gating
Each pair of crtcs (0/1, 2/3, 4/5) can be power gated.
Make sure the power is applied when the crtc is in use and
only power down the pair when both are off.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_crtc.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 841ee3e1a172..62ddf8dd9e69 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -231,6 +231,22 @@ static void atombios_blank_crtc(struct drm_crtc *crtc, int state) atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); } +static void atombios_powergate_crtc(struct drm_crtc *crtc, int state) +{ + struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc); + struct drm_device *dev = crtc->dev; + struct radeon_device *rdev = dev->dev_private; + int index = GetIndexIntoMasterTable(COMMAND, EnableDispPowerGating); + ENABLE_DISP_POWER_GATING_PARAMETERS_V2_1 args; + + memset(&args, 0, sizeof(args)); + + args.ucDispPipeId = radeon_crtc->crtc_id; + args.ucEnable = state; + + atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); +} + void atombios_crtc_dpms(struct drm_crtc *crtc, int mode) { struct drm_device *dev = crtc->dev; @@ -242,6 +258,9 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode) radeon_crtc->enabled = true; /* adjust pm to dpms changes BEFORE enabling crtcs */ radeon_pm_compute_clocks(rdev); + /* disable crtc pair power gating before programming */ + if (ASIC_IS_DCE6(rdev)) + atombios_powergate_crtc(crtc, ATOM_DISABLE); atombios_enable_crtc(crtc, ATOM_ENABLE); if (ASIC_IS_DCE3(rdev) && !ASIC_IS_DCE6(rdev)) atombios_enable_crtc_memreq(crtc, ATOM_ENABLE); @@ -259,6 +278,25 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode) atombios_enable_crtc_memreq(crtc, ATOM_DISABLE); atombios_enable_crtc(crtc, ATOM_DISABLE); radeon_crtc->enabled = false; + /* power gating is per-pair */ + if (ASIC_IS_DCE6(rdev)) { + struct drm_crtc *other_crtc; + struct radeon_crtc *other_radeon_crtc; + list_for_each_entry(other_crtc, &rdev->ddev->mode_config.crtc_list, head) { + other_radeon_crtc = to_radeon_crtc(other_crtc); + if (((radeon_crtc->crtc_id == 0) && (other_radeon_crtc->crtc_id == 1)) || + ((radeon_crtc->crtc_id == 1) && (other_radeon_crtc->crtc_id == 0)) || + ((radeon_crtc->crtc_id == 2) && (other_radeon_crtc->crtc_id == 3)) || + ((radeon_crtc->crtc_id == 3) && (other_radeon_crtc->crtc_id == 2)) || + ((radeon_crtc->crtc_id == 4) && (other_radeon_crtc->crtc_id == 5)) || + ((radeon_crtc->crtc_id == 5) && (other_radeon_crtc->crtc_id == 4))) { + /* if both crtcs in the pair are off, enable power gating */ + if (other_radeon_crtc->enabled == false) + atombios_powergate_crtc(crtc, ATOM_ENABLE); + break; + } + } + } /* adjust pm to dpms changes AFTER disabling crtcs */ radeon_pm_compute_clocks(rdev); break; |