[Spice-devel] [drm/qxl 6/6] qxl: Allow resolution which are not multiple of 8

[Frediano Ziglio]

> 
> The use of drm_cvt_mode() in qxl_add_monitors_config_modes() means that
> the resolutions we are going to present to user-space are going to be
> rounded down to a multiple of 8. In the QXL arbitrary resolution case,
> this is not useful.
> This commit forces the actual width/height that was requested by the
> client in the drm_display_mode structure rather than keeping the
> rounded version.
> 
> Signed-off-by: Christophe Fergeau <cfergeau at redhat.com>
> ---
> 
> I know this is very hacky, but I have no idea what is important to be set in
> the mode struct,
> if there is a better way to create it without getting the rounding to a
> multiple of 8, ...
> 
> 
>  drivers/gpu/drm/qxl/qxl_display.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c
> b/drivers/gpu/drm/qxl/qxl_display.c
> index edb90f6..fc5b01e 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -202,6 +202,9 @@ static int qxl_add_monitors_config_modes(struct
> drm_connector *connector,
>  	mode = drm_cvt_mode(dev, head->width, head->height, 60, false, false,
>  			    false);
>  	mode->type |= DRM_MODE_TYPE_PREFERRED;
> +	mode->hdisplay = head->width;
> +	mode->vdisplay = head->height;
> +	drm_mode_set_name(mode);
>  	*pwidth = head->width;
>  	*pheight = head->height;
>  	drm_mode_probed_add(connector, mode);

If I remember I was discussing with Pavel some time ago about the implementation
of this.
And if I remember he tested some code.
Pavel, do you remember something about?

Frediano