From: Alex Deucher <alexdeucher@xxxxxxxxx>
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@xxxxxxxxx>
---
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 841ee3e..62ddf8d 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;
--
1.7.7.5
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