Hi Nikhil,
Thank you for the patch.
On Thu, Nov 19, 2020 at 09:31:30PM +0530, Nikhil Devshatwar wrote:
> With new connector model, tfp410 will not create the connector and
> SoC driver will rely on format negotiation to setup the encoder format.
>
> Support format negotiations hooks in the drm_bridge_funcs.
> Use helper functions for state management.
>
> Output format is expected to be MEDIA_BUS_FMT_FIXED
> Input format is the one selected by the bridge from DT properties.
>
> Signed-off-by: Nikhil Devshatwar <nikhil.nd@xxxxxx>
> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
>
> Notes:
> changes from v1:
> * Use only MEDIA_BUS_FMT_FIXED for output
>
> drivers/gpu/drm/bridge/ti-tfp410.c | 33 ++++++++++++++++++++++++++++++
> 1 file changed, 33 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
> index ba3fa2a9b8a4..3def9acba86b 100644
> --- a/drivers/gpu/drm/bridge/ti-tfp410.c
> +++ b/drivers/gpu/drm/bridge/ti-tfp410.c
> @@ -204,12 +204,45 @@ static enum drm_mode_status tfp410_mode_valid(struct drm_bridge *bridge,
> return MODE_OK;
> }
>
> +static u32 *tfp410_get_input_bus_fmts(struct drm_bridge *bridge,
> + struct drm_bridge_state *bridge_state,
> + struct drm_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state,
> + u32 output_fmt,
> + unsigned int *num_input_fmts)
> +{
> + struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);
> + u32 *input_fmts;
> +
> + *num_input_fmts = 0;
> +
> + /*
> + * Output of tfp410 is DVI, which is TMDS.
> + * There is no media format defined for this.
> + * Using MEDIA_BUS_FMT_FIXED for now.
> + */
> + if (output_fmt != MEDIA_BUS_FMT_FIXED)
> + return NULL;
> +
> + input_fmts = kzalloc(sizeof(*input_fmts), GFP_KERNEL);
> + if (!input_fmts)
> + return NULL;
> +
> + *num_input_fmts = 1;
> + input_fmts[0] = dvi->bus_format;
> + return input_fmts;
> +}
> +
> static const struct drm_bridge_funcs tfp410_bridge_funcs = {
> .attach = tfp410_attach,
> .detach = tfp410_detach,
> .enable = tfp410_enable,
> .disable = tfp410_disable,
> .mode_valid = tfp410_mode_valid,
> + .atomic_reset = drm_atomic_helper_bridge_reset,
> + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> + .atomic_get_input_bus_fmts = tfp410_get_input_bus_fmts,
> };
>
> static const struct drm_bridge_timings tfp410_default_timings = {
--
Regards,
Laurent Pinchart
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