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drm/sun4i: Don't skip TCONs if they don't have channel 0 

TV TCONs (channel 1 only) are always connected to TV or HDMI encoder.
Because of that, all output endpoints on such TCON node will point to a
encoder which is part of component framework.

Correct current graph traversing algorithm in such way that it doesn't
skip output enpoints with id 0 on TV TCONs.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180625120304.7543-10-jernej.skrabec@siol.net
This commit is contained in:
Jernej Skrabec 2018-06-25 14:02:49 +02:00 committed by Maxime Ripard
parent ef0cf6441f
commit c5cf04df56
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GPG Key ID: D2B4C094214DAF74
1 changed files with 34 additions and 16 deletions
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32
drivers/gpu/drm/sun4i/sun4i_drv.c
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@ -198,6 +198,22 @@ static bool sun4i_drv_node_is_tcon(struct device_node *node)
return !!of_match_node(sun4i_tcon_of_table, node);
}
static bool sun4i_drv_node_is_tcon_with_ch0(struct device_node *node)
{
const struct of_device_id *match;
match = of_match_node(sun4i_tcon_of_table, node);
if (match) {
struct sun4i_tcon_quirks *quirks;
quirks = (struct sun4i_tcon_quirks *)match->data;
return quirks->has_channel_0;
}
return false;
}
static bool sun4i_drv_node_is_tcon_top(struct device_node *node)
{
return !!of_match_node(sun8i_tcon_top_of_table, node);
@ -256,14 +272,7 @@ static void sun4i_drv_traverse_endpoints(struct endpoint_list *list,
continue;
}
/*
* If the node is our TCON, the first port is used for
* panel or bridges, and will not be part of the
* component framework.
*/
if (sun4i_drv_node_is_tcon(node)) {
struct of_endpoint endpoint;
/*
* TCON TOP is always probed before TCON. However, TCON
* points back to TCON TOP when it is source for HDMI.
@ -276,6 +285,14 @@ static void sun4i_drv_traverse_endpoints(struct endpoint_list *list,
continue;
}
/*
* If the node is our TCON with channel 0, the first
* port is used for panel or bridges, and will not be
* part of the component framework.
*/
if (sun4i_drv_node_is_tcon_with_ch0(node)) {
struct of_endpoint endpoint;
if (of_graph_parse_endpoint(ep, &endpoint)) {
DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
of_node_put(remote);
@ -288,6 +305,7 @@ static void sun4i_drv_traverse_endpoints(struct endpoint_list *list,
continue;
}
}
}
kfifo_put(&list->fifo, remote);
}