drm/rockchip: add an common abstracted PSR driver

The PSR driver have exported four symbols for specific device driver, and
it's safe to call them in interrupt context:
- rockchip_drm_psr_register()
- rockchip_drm_psr_unregister()
- rockchip_drm_psr_enable()
- rockchip_drm_psr_disable()
- rockchip_drm_psr_flush()

Encoder driver should call the register/unregister interfaces to hook
itself into common PSR driver, encoder have implement the 'psr_set'
callback which use the set PSR state in hardware side.

Crtc driver would call the enable/disable interfaces when vblank is
enable/disable, after that the common PSR driver would call the encoder
registered callback to set the PSR state.

Fb driver would call the flush interface in 'fb->dirty' callback, this
helper function would force all PSR enabled encoders to exit from PSR
for 3 seconds.

Signed-off-by: Yakir Yang <ykk@rock-chips.com>
[seanpaul removed leftover psr_enabled/psr_work kruft from drm_vop.c]
Signed-off-by: Sean Paul <seanpaul@chromium.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index f5d825550ba9..5eb2b9998d40 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -34,6 +34,7 @@
 #include "rockchip_drm_drv.h"
 #include "rockchip_drm_gem.h"
 #include "rockchip_drm_fb.h"
+#include "rockchip_drm_psr.h"
 #include "rockchip_drm_vop.h"
 
 #define __REG_SET_RELAXED(x, off, mask, shift, v, write_mask) \
@@ -920,6 +921,8 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc)
 
 	spin_unlock_irqrestore(&vop->irq_lock, flags);
 
+	rockchip_drm_psr_disable(&vop->crtc);
+
 	return 0;
 }
 
@@ -936,6 +939,8 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc)
 	VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 0);
 
 	spin_unlock_irqrestore(&vop->irq_lock, flags);
+
+	rockchip_drm_psr_enable(&vop->crtc);
 }
 
 static void vop_crtc_wait_for_update(struct drm_crtc *crtc)
@@ -1590,6 +1595,7 @@ static int vop_bind(struct device *dev, struct device *master, void *data)
 		return ret;
 
 	pm_runtime_enable(&pdev->dev);
+
 	return 0;
 }