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, 12 insertions, 0 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index 55c52734c52d..ba45d9d8bb62 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -22,6 +22,7 @@
 #include "rockchip_drm_drv.h"
 #include "rockchip_drm_fb.h"
 #include "rockchip_drm_gem.h"
+#include "rockchip_drm_psr.h"
 
 #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb)
 
@@ -63,9 +64,20 @@ static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb,
 				     rockchip_fb->obj[0], handle);
 }
 
+static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb,
+				 struct drm_file *file,
+				 unsigned int flags, unsigned int color,
+				 struct drm_clip_rect *clips,
+				 unsigned int num_clips)
+{
+	rockchip_drm_psr_flush(fb->dev);
+	return 0;
+}
+
 static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = {
 	.destroy	= rockchip_drm_fb_destroy,
 	.create_handle	= rockchip_drm_fb_create_handle,
+	.dirty		= rockchip_drm_fb_dirty,
 };
 
 static struct rockchip_drm_fb *