Re: [PATCH v3 5/5] drm/rockchip: Implement CRC debugfs API

[Sean Paul]

On Fri, Jan 6, 2017 at 9:30 AM, Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx> wrote:
> Implement the .set_crc_source() callback and call the DP helpers
> accordingly to start and stop CRC capture.
>
> This is only done if this CRTC is currently using the eDP connector.
>
> v3: Remove superfluous check on rockchip_crtc_state->output_type
>
> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
> ---
>
>  drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 48 +++++++++++++++++++++++++++++
>  1 file changed, 48 insertions(+)
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index fb5f001f51c3..5e19bef6d5b4 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -19,6 +19,7 @@
>  #include <drm/drm_crtc_helper.h>
>  #include <drm/drm_flip_work.h>
>  #include <drm/drm_plane_helper.h>
> +#include <drm/bridge/analogix_dp.h>
>
>  #include <linux/kernel.h>
>  #include <linux/module.h>
> @@ -1105,6 +1106,52 @@ static void vop_crtc_destroy_state(struct drm_crtc *crtc,
>         kfree(s);
>  }
>
> +static struct drm_connector *vop_get_edp_connector(struct vop *vop)
> +{
> +       struct drm_crtc *crtc = &vop->crtc;
> +       struct drm_connector *connector;
> +
> +       mutex_lock(&crtc->dev->mode_config.mutex);
> +       drm_for_each_connector(connector, crtc->dev)
> +               if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> +                       mutex_unlock(&crtc->dev->mode_config.mutex);
> +                       return connector;
> +               }
> +       mutex_unlock(&crtc->dev->mode_config.mutex);
> +
> +       return NULL;
> +}
> +
> +static int vop_crtc_set_crc_source(struct drm_crtc *crtc,
> +                                  const char *source_name, size_t *values_cnt)
> +{
> +       struct vop *vop = to_vop(crtc);
> +       struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc->state);
> +       struct drm_connector *connector;
> +       int ret;
> +
> +       connector = vop_get_edp_connector(vop);
> +       if (!connector)
> +               return -EINVAL;
> +
> +       *values_cnt = 3;
> +
> +       if (source_name &&
> +           strcmp(source_name, "auto") == 0) {
> +
> +               if (s->output_type != DRM_MODE_CONNECTOR_eDP)
> +                       return -EINVAL;
> +
> +               ret = analogix_dp_start_crc(connector);

To pick up my thoughts from 1/5, you could do the following instead:

analogix_dp_start_crc(drm_crtc_index(crtc));


> +       } else if (!source_name)
> +
> +               ret = analogix_dp_stop_crc(connector);
> +       else
> +               ret = -EINVAL;
> +
> +       return ret;
> +}
> +
>  static const struct drm_crtc_funcs vop_crtc_funcs = {
>         .set_config = drm_atomic_helper_set_config,
>         .page_flip = drm_atomic_helper_page_flip,
> @@ -1112,6 +1159,7 @@ static const struct drm_crtc_funcs vop_crtc_funcs = {
>         .reset = vop_crtc_reset,
>         .atomic_duplicate_state = vop_crtc_duplicate_state,
>         .atomic_destroy_state = vop_crtc_destroy_state,
> +       .set_crc_source = vop_crtc_set_crc_source,
>  };
>
>  static void vop_fb_unref_worker(struct drm_flip_work *work, void *val)
> --
> 2.9.3
>
>
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-- 
Sean Paul, Software Engineer, Google / Chromium OS