To simplify interfacing with the panel, wrap it in a panel-bridge and let the DRM bridge helpers handle chaining of operations.
This also prepares for support of DRM_BRIDGE_ATTACH_NO_CONNECTOR, which requires all components in the display pipeline to be represented by bridges.
Signed-off-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com Reviewed-by: Jagan Teki jagan@amarulasolutions.com --- Changes since v1:
- Drop error message when drm_bridge_attach() fails (now printed by the function) - Return ERR_PTR() directly - Clarify which bridge is the next bridge - Drop ti_sn65dsi86.panel field --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 32 +++++++++++++++++---------- 1 file changed, 20 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 28c1ea370ae4..18b4420cc6b3 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -127,7 +127,7 @@ * @host_node: Remote DSI node. * @dsi: Our MIPI DSI source. * @refclk: Our reference clock. - * @panel: Our panel. + * @next_bridge: The bridge on the eDP side. * @enable_gpio: The GPIO we toggle to enable the bridge. * @supplies: Data for bulk enabling/disabling our regulators. * @dp_lanes: Count of dp_lanes we're using. @@ -159,7 +159,7 @@ struct ti_sn65dsi86 { struct device_node *host_node; struct mipi_dsi_device *dsi; struct clk *refclk; - struct drm_panel *panel; + struct drm_bridge *next_bridge; struct gpio_desc *enable_gpio; struct regulator_bulk_data supplies[SN_REGULATOR_SUPPLY_NUM]; int dp_lanes; @@ -404,7 +404,8 @@ connector_to_ti_sn65dsi86(struct drm_connector *connector) static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector) { struct ti_sn65dsi86 *pdata = connector_to_ti_sn65dsi86(connector); - return drm_panel_get_modes(pdata->panel, connector); + + return drm_bridge_get_modes(pdata->next_bridge, connector); }
static enum drm_mode_status @@ -530,8 +531,16 @@ static int ti_sn_bridge_attach(struct drm_bridge *bridge, } pdata->dsi = dsi;
+ /* Attach the next bridge */ + ret = drm_bridge_attach(bridge->encoder, pdata->next_bridge, + &pdata->bridge, flags); + if (ret < 0) + goto err_dsi_detach; + return 0;
+err_dsi_detach: + mipi_dsi_detach(dsi); err_dsi_attach: mipi_dsi_device_unregister(dsi); err_dsi_host: @@ -550,8 +559,6 @@ static void ti_sn_bridge_disable(struct drm_bridge *bridge) { struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
- drm_panel_disable(pdata->panel); - /* disable video stream */ regmap_update_bits(pdata->regmap, SN_ENH_FRAME_REG, VSTREAM_ENABLE, 0); /* semi auto link training mode OFF */ @@ -878,8 +885,6 @@ static void ti_sn_bridge_enable(struct drm_bridge *bridge) /* enable video stream */ regmap_update_bits(pdata->regmap, SN_ENH_FRAME_REG, VSTREAM_ENABLE, VSTREAM_ENABLE); - - drm_panel_enable(pdata->panel); }
static void ti_sn_bridge_pre_enable(struct drm_bridge *bridge) @@ -890,16 +895,12 @@ static void ti_sn_bridge_pre_enable(struct drm_bridge *bridge)
if (!pdata->refclk) ti_sn65dsi86_enable_comms(pdata); - - drm_panel_prepare(pdata->panel); }
static void ti_sn_bridge_post_disable(struct drm_bridge *bridge) { struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
- drm_panel_unprepare(pdata->panel); - if (!pdata->refclk) ti_sn65dsi86_disable_comms(pdata);
@@ -1304,13 +1305,20 @@ static int ti_sn_bridge_probe(struct auxiliary_device *adev, { struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); struct device_node *np = pdata->dev->of_node; + struct drm_panel *panel; int ret;
- ret = drm_of_find_panel_or_bridge(np, 1, 0, &pdata->panel, NULL); + ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL); if (ret) return dev_err_probe(&adev->dev, ret, "could not find any panel node\n");
+ pdata->next_bridge = devm_drm_panel_bridge_add(pdata->dev, panel); + if (IS_ERR(pdata->next_bridge)) { + DRM_ERROR("failed to create panel bridge\n"); + return PTR_ERR(pdata->next_bridge); + } + ti_sn_bridge_parse_lanes(pdata, np);
ret = ti_sn_bridge_parse_dsi_host(pdata);