diff options
| author | Stephen Boyd <swboyd@chromium.org> | 2020-11-02 10:11:43 -0800 |
|---|---|---|
| committer | Sam Ravnborg <sam@ravnborg.org> | 2020-11-07 12:06:10 +0100 |
| commit | 58074b08c04af1817ab34be986a80279e7267d07 (patch) | |
| tree | 9c21cfbfc2b391c6fdf7073381eb83193a077542 /drivers/gpu/drm/bridge | |
| parent | b38558e3059a37e356e39f29fa79591d1030ee7d (diff) | |
| download | linux-58074b08c04af1817ab34be986a80279e7267d07.tar.bz2 | |
drm/bridge: ti-sn65dsi86: Read EDID blob over DDC
Use the DDC connection to read the EDID from the eDP panel instead of
relying on the panel to tell us the modes.
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Sean Paul <seanpaul@chromium.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201102181144.3469197-4-swboyd@chromium.org
Diffstat (limited to 'drivers/gpu/drm/bridge')
| -rw-r--r-- | drivers/gpu/drm/bridge/ti-sn65dsi86.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index fbc3fe427d1a..22d38df27a11 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -121,6 +121,7 @@ * @debugfs: Used for managing our debugfs. * @host_node: Remote DSI node. * @dsi: Our MIPI DSI source. + * @edid: Detected EDID of eDP panel. * @refclk: Our reference clock. * @panel: Our panel. * @enable_gpio: The GPIO we toggle to enable the bridge. @@ -146,6 +147,7 @@ struct ti_sn_bridge { struct drm_bridge bridge; struct drm_connector connector; struct dentry *debugfs; + struct edid *edid; struct device_node *host_node; struct mipi_dsi_device *dsi; struct clk *refclk; @@ -267,6 +269,23 @@ connector_to_ti_sn_bridge(struct drm_connector *connector) static int ti_sn_bridge_connector_get_modes(struct drm_connector *connector) { struct ti_sn_bridge *pdata = connector_to_ti_sn_bridge(connector); + struct edid *edid = pdata->edid; + int num, ret; + + if (!edid) { + pm_runtime_get_sync(pdata->dev); + edid = pdata->edid = drm_get_edid(connector, &pdata->aux.ddc); + pm_runtime_put(pdata->dev); + } + + if (edid && drm_edid_is_valid(edid)) { + ret = drm_connector_update_edid_property(connector, edid); + if (!ret) { + num = drm_add_edid_modes(connector, edid); + if (num) + return num; + } + } return drm_panel_get_modes(pdata->panel, connector); } @@ -1262,6 +1281,7 @@ static int ti_sn_bridge_remove(struct i2c_client *client) if (!pdata) return -EINVAL; + kfree(pdata->edid); ti_sn_debugfs_remove(pdata); of_node_put(pdata->host_node); |