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drm/tilcdc: disable the lcd controller/dma engine when suspend invoked

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The LCD controller must be deactivated and all DMA transactions stopped
when the suspend power state is entered otherwise the PRCM causes the L3
bus to get stuck in transition state.

This commit forces the lcdc to be shut down and waits for all pending DMA
transactions to complete as part of the suspend handler for this driver.

Signed-off-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Darren Etheridge
2014-09-25 00:59:32 +00:00
committed by Jyri Sarha
parent b62222fcaa
commit 614b3cfeb8
3 changed files with 5 additions and 2 deletions
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3
drivers/gpu/drm/tilcdc/tilcdc_crtc.c
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@@ -138,7 +138,6 @@ static void stop(struct drm_crtc *crtc)
tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
}
static void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode);
static void tilcdc_crtc_destroy(struct drm_crtc *crtc)
{
struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
@@ -192,7 +191,7 @@ static int tilcdc_crtc_page_flip(struct drm_crtc *crtc,
return 0;
}
static void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode)
void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
struct drm_device *dev = crtc->dev;