xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/tilcdc: Enable and disable interrupts in crtc start() and stop()

Browse Source 
Enable and disable interrupts in crtc start() and stop(). None of the
interrupts can fire if CRTC is disabled, so it is cleaner - when
considering suspend/resume code etc. - to enable the interrupts when
CRTC is turned on and to disable them when CRTC is turned off.

Signed-off-by: Jyri Sarha <jsarha@ti.com>
This commit is contained in:
Jyri Sarha
2016-06-21 16:00:44 +03:00
parent 018cfbde63
commit afaf833dd5
2 changed files with 39 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/gpu/drm/tilcdc/tilcdc_crtc.c
View File

@@ -89,6 +89,41 @@ static void set_scanout(struct drm_crtc *crtc, struct drm_framebuffer *fb)
tilcdc_crtc->curr_fb = fb;
}
static void tilcdc_crtc_enable_irqs(struct drm_device *dev)
{
struct tilcdc_drm_private *priv = dev->dev_private;
tilcdc_clear_irqstatus(dev, 0xffffffff);
if (priv->rev == 1) {
tilcdc_set(dev, LCDC_RASTER_CTRL_REG,
LCDC_V1_UNDERFLOW_INT_ENA);
} else {
tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG,
LCDC_V2_UNDERFLOW_INT_ENA |
LCDC_V2_END_OF_FRAME0_INT_ENA |
LCDC_FRAME_DONE | LCDC_SYNC_LOST);
}
}
static void tilcdc_crtc_disable_irqs(struct drm_device *dev)
{
struct tilcdc_drm_private *priv = dev->dev_private;
/* disable irqs that we might have enabled: */
if (priv->rev == 1) {
tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
LCDC_V1_UNDERFLOW_INT_ENA | LCDC_V1_PL_INT_ENA);
tilcdc_clear(dev, LCDC_DMA_CTRL_REG,
LCDC_V1_END_OF_FRAME_INT_ENA);
} else {
tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG,
LCDC_V2_UNDERFLOW_INT_ENA | LCDC_V2_PL_INT_ENA |
LCDC_V2_END_OF_FRAME0_INT_ENA |
LCDC_FRAME_DONE | LCDC_SYNC_LOST);
}
}
static void reset(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
@@ -108,6 +143,8 @@ static void start(struct drm_crtc *crtc)
reset(crtc);
tilcdc_crtc_enable_irqs(dev);
tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_DUAL_FRAME_BUFFER_ENABLE);
tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_PALETTE_LOAD_MODE(DATA_ONLY));
tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
@@ -138,6 +175,8 @@ static void stop(struct drm_crtc *crtc)
}
drm_crtc_vblank_off(crtc);
tilcdc_crtc_disable_irqs(dev);
}
static void tilcdc_crtc_destroy(struct drm_crtc *crtc)