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

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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
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48
drivers/gpu/drm/tilcdc/tilcdc_drv.c
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@@ -192,9 +192,7 @@ static int tilcdc_unload(struct drm_device *dev)
drm_mode_config_cleanup(dev);
drm_vblank_cleanup(dev);
pm_runtime_get_sync(dev->dev);
drm_irq_uninstall(dev);
pm_runtime_put_sync(dev->dev);
#ifdef CONFIG_CPU_FREQ
cpufreq_unregister_notifier(&priv->freq_transition,
@@ -350,9 +348,7 @@ static int tilcdc_load(struct drm_device *dev, unsigned long flags)
goto fail_external_cleanup;
}
pm_runtime_get_sync(dev->dev);
ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0));
pm_runtime_put_sync(dev->dev);
if (ret < 0) {
dev_err(dev->dev, "failed to install IRQ handler\n");
goto fail_vblank_cleanup;
@@ -382,9 +378,7 @@ static int tilcdc_load(struct drm_device *dev, unsigned long flags)
return 0;
fail_irq_uninstall:
pm_runtime_get_sync(dev->dev);
drm_irq_uninstall(dev);
pm_runtime_put_sync(dev->dev);
fail_vblank_cleanup:
drm_vblank_cleanup(dev);
@@ -435,45 +429,6 @@ static irqreturn_t tilcdc_irq(int irq, void *arg)
return tilcdc_crtc_irq(priv->crtc);
}
static void tilcdc_irq_preinstall(struct drm_device *dev)
{
tilcdc_clear_irqstatus(dev, 0xffffffff);
}
static int tilcdc_irq_postinstall(struct drm_device *dev)
{
struct tilcdc_drm_private *priv = dev->dev_private;
/* enable FIFO underflow irq: */
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);
}
return 0;
}
static void tilcdc_irq_uninstall(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 int tilcdc_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
return 0;
@@ -616,9 +571,6 @@ static struct drm_driver tilcdc_driver = {
.unload = tilcdc_unload,
.lastclose = tilcdc_lastclose,
.irq_handler = tilcdc_irq,
.irq_preinstall = tilcdc_irq_preinstall,
.irq_postinstall = tilcdc_irq_postinstall,
.irq_uninstall = tilcdc_irq_uninstall,
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = tilcdc_enable_vblank,
.disable_vblank = tilcdc_disable_vblank,