Hi,
On 29/06/18 20:02, Benoit Parrot wrote:
> We currently assumed that an overlay has the same width and height as
same _maximum_.
> the overlay manager. This assumption is incorrect. On some variant the
> overlay manager is twice the width that the overlay can handle. We need
The maximum width supported is twice the max width that an overlay can
handle.
> to add the appropriate data per variant as well as export a helper
> function to retrieve the data so check can be made dynamically. We
> currently add such a check in the dispc_ovl_setup() which will return an
> error along with a WARN in case the required width exceed the overlay's
> ability.
>
> Signed-off-by: Benoit Parrot <bpar...@ti.com>
> ---
> drivers/gpu/drm/omapdrm/dss/dispc.c | 29 +++++++++++++++++++++++++++++
> drivers/gpu/drm/omapdrm/dss/omapdss.h | 2 ++
> 2 files changed, 31 insertions(+)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c
> b/drivers/gpu/drm/omapdrm/dss/dispc.c
> index cfdcc3681494..1b7a6ef7897f 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dispc.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
> @@ -103,6 +103,8 @@ struct dispc_features {
> u8 mgr_height_start;
> u16 mgr_width_max;
> u16 mgr_height_max;
> + u16 ovl_width_max;
> + u16 ovl_height_max;
> unsigned long max_lcd_pclk;
> unsigned long max_tv_pclk;
> unsigned int max_downscale;
> @@ -2605,6 +2607,13 @@ static int dispc_ovl_calc_scaling(struct dispc_device
> *dispc,
> return 0;
> }
>
> +static void dispc_ovl_get_max_size(struct dispc_device *dispc,
> + u16 *width, u16 *height)
> +{
> + *width = dispc->feat->ovl_width_max;
> + *height = dispc->feat->ovl_height_max;
> +}
> +
> static int dispc_ovl_setup_common(struct dispc_device *dispc,
> enum omap_plane_id plane,
> enum omap_overlay_caps caps,
> @@ -2648,6 +2657,11 @@ static int dispc_ovl_setup_common(struct dispc_device
> *dispc,
> out_width = out_width == 0 ? width : out_width;
> out_height = out_height == 0 ? height : out_height;
>
> + if (WARN(out_width > dispc->feat->ovl_width_max,
> + "Requested OVL width (%d) is larger than can be supported
> (%d).\n",
> + out_width, dispc->feat->ovl_width_max))
> + return -EINVAL;
We should do this check in the omap_plane_atomic_check().
Tomi
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