leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/bridge: ti-sn65dsi86: Read EDID blob over DDC

Browse Source 
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
This commit is contained in:
Stephen Boyd 2020-11-02 10:11:43 -08:00 committed by Sam Ravnborg
parent b38558e305
commit 58074b08c0
1 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/gpu/drm/bridge/ti-sn65dsi86.c
View File

@ -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);