On 26/03/18 19:21, Benoit Parrot wrote:
> Currently available display mode from a connector are filtered out
> based only on pixel clock capability. However we also need to filter
> out wider mode if we cannot handle them based on available pipeline
> capabilities.
>
> Signed-off-by: Benoit Parrot <bparrot@xxxxxx>
> ---
> drivers/gpu/drm/omapdrm/dss/dispc.c | 27 +++++++++++++++++++++++++++
> drivers/gpu/drm/omapdrm/dss/omapdss.h | 1 +
> drivers/gpu/drm/omapdrm/omap_connector.c | 10 ++++++++++
> 3 files changed, 38 insertions(+)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
> index 624dee22f46b..35541d4441df 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dispc.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
> @@ -100,6 +100,8 @@ 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;
> @@ -2465,6 +2467,12 @@ static int dispc_ovl_calc_scaling(unsigned long pclk, unsigned long lclk,
> return 0;
> }
>
> +static void dispc_ovl_get_max_size(u16 *width, u16 *height)
> +{
> + *width = dispc.feat->ovl_width_max;
> + *height = dispc.feat->ovl_height_max;
> +}
> +
> static int dispc_ovl_setup_common(enum omap_plane_id plane,
> enum omap_overlay_caps caps, u32 paddr, u32 p_uv_addr,
> u16 screen_width, int pos_x, int pos_y, u16 width, u16 height,
> @@ -2500,6 +2508,10 @@ static int dispc_ovl_setup_common(enum omap_plane_id plane,
> out_width = out_width == 0 ? width : out_width;
> out_height = out_height == 0 ? height : out_height;
>
> + 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);
Why don't you return an error here? I don't see a need for WARN here.
> void dispc_set_ops(const struct dispc_ops *o);
> diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
> index a0d7b1d905e8..d5e059abb555 100644
> --- a/drivers/gpu/drm/omapdrm/omap_connector.c
> +++ b/drivers/gpu/drm/omapdrm/omap_connector.c
> @@ -197,6 +197,16 @@ static int omap_connector_mode_valid(struct drm_connector *connector,
> r = 0;
> }
>
> + /* Check if the advertised width exceed what the pipeline can do */
> + if (!r) {
> + struct omap_drm_private *priv = dev->dev_private;
> + u16 width, height;
> +
> + priv->dispc_ops->ovl_get_max_size(&width, &height);
> + if (mode->hdisplay > width)
> + r = -EINVAL;
You should check the height also.
Tomi
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