Hi Kieran,
Thank you for the patch.
On Friday, 15 September 2017 19:42:06 EEST Kieran Bingham wrote:
> The pipeline needs to ensure that the hardware is idle for suspend and
> resume operations.
I'm not sure to really understand this sentence.
> Implement suspend and resume functions using the DRM atomic helper
> functions.
>
> CC: dri-devel@xxxxxxxxxxxxxxxxxxxxx
>
> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
The rest of the patch looks good to me. With the commit message clarified,
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/rcar-du/rcar_du_drv.c | 18 +++++++++++++++---
> drivers/gpu/drm/rcar-du/rcar_du_drv.h | 1 +
> 2 files changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> b/drivers/gpu/drm/rcar-du/rcar_du_drv.c index 09fbceade6b1..01b91d0c169c
> 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> @@ -22,6 +22,7 @@
> #include <linux/wait.h>
>
> #include <drm/drmP.h>
> +#include <drm/drm_atomic_helper.h>
> #include <drm/drm_crtc_helper.h>
> #include <drm/drm_fb_cma_helper.h>
> #include <drm/drm_gem_cma_helper.h>
> @@ -267,9 +268,19 @@ static struct drm_driver rcar_du_driver = {
> static int rcar_du_pm_suspend(struct device *dev)
> {
> struct rcar_du_device *rcdu = dev_get_drvdata(dev);
> + struct drm_atomic_state *state;
>
> drm_kms_helper_poll_disable(rcdu->ddev);
> - /* TODO Suspend the CRTC */
> + drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
> +
> + state = drm_atomic_helper_suspend(rcdu->ddev);
> + if (IS_ERR(state)) {
> + drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
> + drm_kms_helper_poll_enable(rcdu->ddev);
> + return PTR_ERR(state);
> + }
> +
> + rcdu->suspend_state = state;
>
> return 0;
> }
> @@ -278,9 +289,10 @@ static int rcar_du_pm_resume(struct device *dev)
> {
> struct rcar_du_device *rcdu = dev_get_drvdata(dev);
>
> - /* TODO Resume the CRTC */
> -
> + drm_atomic_helper_resume(rcdu->ddev, rcdu->suspend_state);
> + drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
> drm_kms_helper_poll_enable(rcdu->ddev);
> +
> return 0;
> }
> #endif
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> b/drivers/gpu/drm/rcar-du/rcar_du_drv.h index f8cd79488ece..f400fde65a0c
> 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> @@ -81,6 +81,7 @@ struct rcar_du_device {
>
> struct drm_device *ddev;
> struct drm_fbdev_cma *fbdev;
> + struct drm_atomic_state *suspend_state;
>
> struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
> unsigned int num_crtcs;
--
Regards,
Laurent Pinchart
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