Hi Sam,
Thank you for the patch.
On Fri, Jul 03, 2020 at 09:24:02PM +0200, Sam Ravnborg wrote:
> Prepare the bridge driver for use in a chained setup by
> replacing direct use of drm_panel with drm_panel_bridge support.
>
> The bridge driver assume the panel is optional.
> The relevant tests are migrated over to check for the
> pnale bridge to keep the same functionality.
s/pnale/panel/
> Note: the bridge panel will use the connector type from the panel.
>
> Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
> Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
> Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: Jonas Karlman <jonas@xxxxxxxxx>
> Cc: Jernej Skrabec <jernej.skrabec@xxxxxxxx>
> ---
> drivers/gpu/drm/bridge/tc358767.c | 57 +++++++++++++++----------------
> 1 file changed, 27 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
> index c2777b226c75..08d483664258 100644
> --- a/drivers/gpu/drm/bridge/tc358767.c
> +++ b/drivers/gpu/drm/bridge/tc358767.c
> @@ -244,8 +244,8 @@ struct tc_data {
> struct drm_dp_aux aux;
>
> struct drm_bridge bridge;
> + struct drm_bridge *panel_bridge;
> struct drm_connector connector;
> - struct drm_panel *panel;
>
> /* link settings */
> struct tc_edp_link link;
> @@ -1236,13 +1236,6 @@ static int tc_stream_disable(struct tc_data *tc)
> return 0;
> }
>
> -static void tc_bridge_pre_enable(struct drm_bridge *bridge)
> -{
> - struct tc_data *tc = bridge_to_tc(bridge);
> -
> - drm_panel_prepare(tc->panel);
> -}
> -
> static void tc_bridge_enable(struct drm_bridge *bridge)
> {
> struct tc_data *tc = bridge_to_tc(bridge);
> @@ -1266,8 +1259,6 @@ static void tc_bridge_enable(struct drm_bridge *bridge)
> tc_main_link_disable(tc);
> return;
> }
> -
> - drm_panel_enable(tc->panel);
> }
>
> static void tc_bridge_disable(struct drm_bridge *bridge)
> @@ -1275,8 +1266,6 @@ static void tc_bridge_disable(struct drm_bridge *bridge)
> struct tc_data *tc = bridge_to_tc(bridge);
> int ret;
>
> - drm_panel_disable(tc->panel);
> -
> ret = tc_stream_disable(tc);
> if (ret < 0)
> dev_err(tc->dev, "main link stream stop error: %d\n", ret);
> @@ -1286,13 +1275,6 @@ static void tc_bridge_disable(struct drm_bridge *bridge)
> dev_err(tc->dev, "main link disable error: %d\n", ret);
> }
>
> -static void tc_bridge_post_disable(struct drm_bridge *bridge)
> -{
> - struct tc_data *tc = bridge_to_tc(bridge);
> -
> - drm_panel_unprepare(tc->panel);
> -}
> -
> static bool tc_bridge_mode_fixup(struct drm_bridge *bridge,
> const struct drm_display_mode *mode,
> struct drm_display_mode *adj)
> @@ -1348,9 +1330,11 @@ static int tc_connector_get_modes(struct drm_connector *connector)
> return 0;
> }
>
> - count = drm_panel_get_modes(tc->panel, connector);
> - if (count > 0)
> - return count;
> + if (tc->panel_bridge) {
> + count = drm_bridge_get_modes(tc->panel_bridge, connector);
> + if (count > 0)
> + return count;
> + }
>
> edid = drm_get_edid(connector, &tc->aux.ddc);
>
> @@ -1378,7 +1362,7 @@ static enum drm_connector_status tc_connector_detect(struct drm_connector *conne
> int ret;
>
> if (tc->hpd_pin < 0) {
> - if (tc->panel)
> + if (tc->panel_bridge)
> return connector_status_connected;
> else
> return connector_status_unknown;
> @@ -1413,6 +1397,13 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
> struct drm_device *drm = bridge->dev;
> int ret;
>
> + if (tc->panel_bridge) {
> + ret = drm_bridge_attach(tc->bridge.encoder, tc->panel_bridge,
> + &tc->bridge, flags);
> + if (ret < 0)
> + return ret;
> + }
With this both this driver and the panel bridge driver will create a
connector. The simplest way to handle that is probably to pass
flags & ~DRM_BRIDGE_ATTACH_NO_CONNECTOR to drm_bridge_attach(). It's a
bit of a hack, but should go away once all users are converted to
!DRM_BRIDGE_ATTACH_NO_CONNECTOR.
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> +
> if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) {
> DRM_ERROR("Fix bridge driver to make connector optional!");
> return -EINVAL;
> @@ -1421,7 +1412,7 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
> /* Create DP/eDP connector */
> drm_connector_helper_add(&tc->connector, &tc_connector_helper_funcs);
> ret = drm_connector_init(drm, &tc->connector, &tc_connector_funcs,
> - tc->panel ? DRM_MODE_CONNECTOR_eDP :
> + tc->panel_bridge ? DRM_MODE_CONNECTOR_eDP :
> DRM_MODE_CONNECTOR_DisplayPort);
> if (ret)
> return ret;
> @@ -1435,9 +1426,6 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
> DRM_CONNECTOR_POLL_DISCONNECT;
> }
>
> - if (tc->panel)
> - drm_panel_attach(tc->panel, &tc->connector);
> -
> drm_display_info_set_bus_formats(&tc->connector.display_info,
> &bus_format, 1);
> tc->connector.display_info.bus_flags =
> @@ -1453,10 +1441,8 @@ static const struct drm_bridge_funcs tc_bridge_funcs = {
> .attach = tc_bridge_attach,
> .mode_valid = tc_mode_valid,
> .mode_set = tc_bridge_mode_set,
> - .pre_enable = tc_bridge_pre_enable,
> .enable = tc_bridge_enable,
> .disable = tc_bridge_disable,
> - .post_disable = tc_bridge_post_disable,
> .mode_fixup = tc_bridge_mode_fixup,
> };
>
> @@ -1547,6 +1533,7 @@ static irqreturn_t tc_irq_handler(int irq, void *arg)
> static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
> {
> struct device *dev = &client->dev;
> + struct drm_panel *panel;
> struct tc_data *tc;
> int ret;
>
> @@ -1557,10 +1544,20 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)
> tc->dev = dev;
>
> /* port@2 is the output port */
> - ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &tc->panel, NULL);
> + ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, NULL);
> if (ret && ret != -ENODEV)
> return ret;
>
> + if (panel) {
> + struct drm_bridge *pbridge;
> +
> + pbridge = devm_drm_panel_bridge_add(dev, panel);
> + if (IS_ERR(pbridge))
> + return PTR_ERR(pbridge);
> +
> + tc->panel_bridge = pbridge;
> + }
> +
> /* Shut down GPIO is optional */
> tc->sd_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
> if (IS_ERR(tc->sd_gpio))
--
Regards,
Laurent Pinchart
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