[PATCH 1/2] drm/tilcdc: Do not keep vblank interrupts enabled all the time

[Laurent Pinchart]

Hi Jyri,

Thank you for the patch.

On Mon, Sep 14, 2020 at 11:34:49AM +0300, Jyri Sarha wrote:
> END_OF_FRAME interrupts have been enabled all the time since the
> beginning of this driver. It is about time to add this feature.
> 
> Signed-off-by: Jyri Sarha <jsarha at ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
>  drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 36 +++++++++++++++++++++++++---
>  1 file changed, 33 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> index 1856962411c7..29f263e1975a 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
> @@ -147,12 +147,9 @@ static void tilcdc_crtc_enable_irqs(struct drm_device *dev)
>  		tilcdc_set(dev, LCDC_RASTER_CTRL_REG,
>  			LCDC_V1_SYNC_LOST_INT_ENA | LCDC_V1_FRAME_DONE_INT_ENA |
>  			LCDC_V1_UNDERFLOW_INT_ENA);
> -		tilcdc_set(dev, LCDC_DMA_CTRL_REG,
> -			LCDC_V1_END_OF_FRAME_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);
>  	}
>  }
> @@ -678,11 +675,44 @@ static int tilcdc_crtc_atomic_check(struct drm_crtc *crtc,
>  
>  static int tilcdc_crtc_enable_vblank(struct drm_crtc *crtc)
>  {
> +	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
> +	struct drm_device *dev = crtc->dev;
> +	struct tilcdc_drm_private *priv = dev->dev_private;
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags);
> +
> +	tilcdc_clear_irqstatus(dev, LCDC_END_OF_FRAME0);
> +
> +	if (priv->rev == 1)
> +		tilcdc_set(dev, LCDC_DMA_CTRL_REG,
> +			   LCDC_V1_END_OF_FRAME_INT_ENA);
> +	else
> +		tilcdc_set(dev, LCDC_INT_ENABLE_SET_REG,
> +			   LCDC_V2_END_OF_FRAME0_INT_ENA);
> +
> +	spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags);
> +
>  	return 0;
>  }
>  
>  static void tilcdc_crtc_disable_vblank(struct drm_crtc *crtc)
>  {
> +	struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
> +	struct drm_device *dev = crtc->dev;
> +	struct tilcdc_drm_private *priv = dev->dev_private;
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags);
> +
> +	if (priv->rev == 1)
> +		tilcdc_clear(dev, LCDC_DMA_CTRL_REG,
> +			     LCDC_V1_END_OF_FRAME_INT_ENA);
> +	else
> +		tilcdc_clear(dev, LCDC_INT_ENABLE_SET_REG,
> +			     LCDC_V2_END_OF_FRAME0_INT_ENA);
> +
> +	spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags);
>  }
>  
>  static void tilcdc_crtc_reset(struct drm_crtc *crtc)

-- 
Regards,

Laurent Pinchart