Hi Rob,
Thank you for the patch.
On Wed, Aug 11, 2021 at 04:52:49PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@xxxxxxxxxxxx>
>
> For the brave new world of bridges not creating their own connectors, we
> need to implement the max clock limitation via bridge->mode_valid()
> instead of connector->mode_valid().
>
> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/bridge/ti-sn65dsi86.c | 24 +++++++++++++++++++-----
> 1 file changed, 19 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index 5d3b30b2f547..38dcc49eccaf 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -595,6 +595,15 @@ static struct auxiliary_driver ti_sn_aux_driver = {
> .id_table = ti_sn_aux_id_table,
> };
>
> +static enum drm_mode_status check_mode(const struct drm_display_mode *mode)
> +{
> + /* maximum supported resolution is 4K at 60 fps */
> + if (mode->clock > 594000)
> + return MODE_CLOCK_HIGH;
> +
> + return MODE_OK;
> +}
> +
> /* -----------------------------------------------------------------------------
> * DRM Connector Operations
> */
> @@ -616,11 +625,7 @@ static enum drm_mode_status
> ti_sn_bridge_connector_mode_valid(struct drm_connector *connector,
> struct drm_display_mode *mode)
> {
> - /* maximum supported resolution is 4K at 60 fps */
> - if (mode->clock > 594000)
> - return MODE_CLOCK_HIGH;
> -
> - return MODE_OK;
> + return check_mode(mode);
Do we need to implement the connector .mode_valid() operation, given
that the bridge is linked in the chain ?
> }
>
> static struct drm_connector_helper_funcs ti_sn_bridge_connector_helper_funcs = {
> @@ -763,6 +768,14 @@ static void ti_sn_bridge_detach(struct drm_bridge *bridge)
> drm_dp_aux_unregister(&bridge_to_ti_sn65dsi86(bridge)->aux);
> }
>
> +static enum drm_mode_status
> +ti_sn_bridge_mode_valid(struct drm_bridge *bridge,
> + const struct drm_display_info *info,
> + const struct drm_display_mode *mode)
> +{
> + return check_mode(mode);
> +}
> +
> static void ti_sn_bridge_disable(struct drm_bridge *bridge)
> {
> struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
> @@ -1118,6 +1131,7 @@ static void ti_sn_bridge_post_disable(struct drm_bridge *bridge)
> static const struct drm_bridge_funcs ti_sn_bridge_funcs = {
> .attach = ti_sn_bridge_attach,
> .detach = ti_sn_bridge_detach,
> + .mode_valid = ti_sn_bridge_mode_valid,
> .pre_enable = ti_sn_bridge_pre_enable,
> .enable = ti_sn_bridge_enable,
> .disable = ti_sn_bridge_disable,
--
Regards,
Laurent Pinchart
