diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2010-04-22 12:52:11 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-05-18 18:20:49 +1000 |
| commit | 2031f77ca9c17133869b265210418959a909d259 (patch) | |
| tree | 21fc2aedea8f3c80c4de1d7b1168479bc7a1ce98 /drivers/gpu/drm/radeon/rs600.c | |
| parent | def9ba9cf6a8266ee1ffd72556db002c3a2663db (diff) | |
drm/radeon/kms: add support for gui idle interrupts (v4)
Useful for certain power management operations. You
need to wait for the GUI engine (2D, 3D, CP, etc.) to be
idle before changing clocks or adjusting engine parameters.
(v2) Fix gui idle enable on pre-r6xx asics
(v3) The gui idle interrrupt status bit is permanently asserted
on pre-r6xx chips, but the interrrupt is still generated.
workaround it in the driver.
(v4) Add support for evergreen
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/rs600.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rs600.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index 5e3f21861f4..b312b72d76c 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -382,6 +382,9 @@ int rs600_irq_set(struct radeon_device *rdev) if (rdev->irq.sw_int) { tmp |= S_000040_SW_INT_EN(1); } + if (rdev->irq.gui_idle) { + tmp |= S_000040_GUI_IDLE(1); + } if (rdev->irq.crtc_vblank_int[0]) { mode_int |= S_006540_D1MODE_VBLANK_INT_MASK(1); } @@ -404,9 +407,15 @@ int rs600_irq_set(struct radeon_device *rdev) static inline uint32_t rs600_irq_ack(struct radeon_device *rdev, u32 *r500_disp_int) { uint32_t irqs = RREG32(R_000044_GEN_INT_STATUS); - uint32_t irq_mask = ~C_000044_SW_INT; + uint32_t irq_mask = S_000044_SW_INT(1); u32 tmp; + /* the interrupt works, but the status bit is permanently asserted */ + if (rdev->irq.gui_idle && radeon_gui_idle(rdev)) { + if (!rdev->irq.gui_idle_acked) + irq_mask |= S_000044_GUI_IDLE_STAT(1); + } + if (G_000044_DISPLAY_INT_STAT(irqs)) { *r500_disp_int = RREG32(R_007EDC_DISP_INTERRUPT_STATUS); if (G_007EDC_LB_D1_VBLANK_INTERRUPT(*r500_disp_int)) { @@ -454,6 +463,9 @@ int rs600_irq_process(struct radeon_device *rdev) uint32_t r500_disp_int; bool queue_hotplug = false; + /* reset gui idle ack. the status bit is broken */ + rdev->irq.gui_idle_acked = false; + status = rs600_irq_ack(rdev, &r500_disp_int); if (!status && !r500_disp_int) { return IRQ_NONE; @@ -462,6 +474,12 @@ int rs600_irq_process(struct radeon_device *rdev) /* SW interrupt */ if (G_000044_SW_INT(status)) radeon_fence_process(rdev); + /* GUI idle */ + if (G_000040_GUI_IDLE(status)) { + rdev->irq.gui_idle_acked = true; + rdev->pm.gui_idle = true; + wake_up(&rdev->irq.idle_queue); + } /* Vertical blank interrupts */ if (G_007EDC_LB_D1_VBLANK_INTERRUPT(r500_disp_int)) { drm_handle_vblank(rdev->ddev, 0); @@ -483,6 +501,8 @@ int rs600_irq_process(struct radeon_device *rdev) } status = rs600_irq_ack(rdev, &r500_disp_int); } + /* reset gui idle ack. the status bit is broken */ + rdev->irq.gui_idle_acked = false; if (queue_hotplug) queue_work(rdev->wq, &rdev->hotplug_work); if (rdev->msi_enabled) { |