Re: [PATCH v2 4/4] drm/qxl: Use simple encoder

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Hi Thomas.

On Tue, Feb 18, 2020 at 09:48:15AM +0100, Thomas Zimmermann wrote:
> The qxl driver uses an empty implementation for its encoder. Replace
> the code with the generic simple encoder.
> 
> v2:
> 	* rebase onto new simple-encoder interface
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
I looked at best_encoder - but could not see we could do anything.
So from browsing the code:
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>

	Sam

> ---
>  drivers/gpu/drm/qxl/qxl_display.c | 18 +++---------------
>  1 file changed, 3 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> index ab4f8dd00400..9c0e1add59fb 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -31,6 +31,7 @@
>  #include <drm/drm_gem_framebuffer_helper.h>
>  #include <drm/drm_plane_helper.h>
>  #include <drm/drm_probe_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
>  
>  #include "qxl_drv.h"
>  #include "qxl_object.h"
> @@ -1007,9 +1008,6 @@ static struct drm_encoder *qxl_best_encoder(struct drm_connector *connector)
>  	return &qxl_output->enc;
>  }
>  
> -static const struct drm_encoder_helper_funcs qxl_enc_helper_funcs = {
> -};
> -
>  static const struct drm_connector_helper_funcs qxl_connector_helper_funcs = {
>  	.get_modes = qxl_conn_get_modes,
>  	.mode_valid = qxl_conn_mode_valid,
> @@ -1059,15 +1057,6 @@ static const struct drm_connector_funcs qxl_connector_funcs = {
>  	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
>  };
>  
> -static void qxl_enc_destroy(struct drm_encoder *encoder)
> -{
> -	drm_encoder_cleanup(encoder);
> -}
> -
> -static const struct drm_encoder_funcs qxl_enc_funcs = {
> -	.destroy = qxl_enc_destroy,
> -};
> -
>  static int qxl_mode_create_hotplug_mode_update_property(struct qxl_device *qdev)
>  {
>  	if (qdev->hotplug_mode_update_property)
> @@ -1098,15 +1087,14 @@ static int qdev_output_init(struct drm_device *dev, int num_output)
>  	drm_connector_init(dev, &qxl_output->base,
>  			   &qxl_connector_funcs, DRM_MODE_CONNECTOR_VIRTUAL);
>  
> -	drm_encoder_init(dev, &qxl_output->enc, &qxl_enc_funcs,
> -			 DRM_MODE_ENCODER_VIRTUAL, NULL);
> +	drm_simple_encoder_init(dev, &qxl_output->enc,
> +				DRM_MODE_ENCODER_VIRTUAL);
>  
>  	/* we get HPD via client monitors config */
>  	connector->polled = DRM_CONNECTOR_POLL_HPD;
>  	encoder->possible_crtcs = 1 << num_output;
>  	drm_connector_attach_encoder(&qxl_output->base,
>  					  &qxl_output->enc);
> -	drm_encoder_helper_add(encoder, &qxl_enc_helper_funcs);
>  	drm_connector_helper_add(connector, &qxl_connector_helper_funcs);
>  
>  	drm_object_attach_property(&connector->base,
> -- 
> 2.25.0
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