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drm: convert drivers to use drm_of_find_panel_or_bridge

Telusuri Sumber 
Similar to the previous commit, convert drivers open coding OF graph
parsing to use drm_of_find_panel_or_bridge instead.

This changes some error messages to debug messages (in the graph core).
Graph connections are often "no connects" depending on the particular
board, so we want to avoid spurious messages. Plus the kernel is not a
DT validator.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
[seanpaul dropped rockchip changes since they're now obsolete]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
This commit is contained in:
Rob Herring
2017-03-29 13:55:46 -05:00
committed by Sean Paul
orang tua 86418f90a4
melakukan ebc9446135
14 mengubah file dengan 93 tambahan dan 394 penghapusan
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90
drivers/gpu/drm/sun4i/sun4i_tcon.c
Melihat File

@@ -15,13 +15,12 @@
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_of.h>
#include <linux/component.h>
#include <linux/ioport.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>
#include <linux/reset.h>
@@ -405,74 +404,6 @@ static int sun4i_tcon_init_regmap(struct device *dev,
return 0;
}
struct drm_panel *sun4i_tcon_find_panel(struct device_node *node)
{
struct device_node *port, *remote, *child;
struct device_node *end_node = NULL;
/* Inputs are listed first, then outputs */
port = of_graph_get_port_by_id(node, 1);
/*
* Our first output is the RGB interface where the panel will
* be connected.
*/
for_each_child_of_node(port, child) {
u32 reg;
of_property_read_u32(child, "reg", &reg);
if (reg == 0)
end_node = child;
}
if (!end_node) {
DRM_DEBUG_DRIVER("Missing panel endpoint\n");
return ERR_PTR(-ENODEV);
}
remote = of_graph_get_remote_port_parent(end_node);
if (!remote) {
DRM_DEBUG_DRIVER("Unable to parse remote node\n");
return ERR_PTR(-EINVAL);
}
return of_drm_find_panel(remote) ?: ERR_PTR(-EPROBE_DEFER);
}
struct drm_bridge *sun4i_tcon_find_bridge(struct device_node *node)
{
struct device_node *port, *remote, *child;
struct device_node *end_node = NULL;
/* Inputs are listed first, then outputs */
port = of_graph_get_port_by_id(node, 1);
/*
* Our first output is the RGB interface where the panel will
* be connected.
*/
for_each_child_of_node(port, child) {
u32 reg;
of_property_read_u32(child, "reg", &reg);
if (reg == 0)
end_node = child;
}
if (!end_node) {
DRM_DEBUG_DRIVER("Missing bridge endpoint\n");
return ERR_PTR(-ENODEV);
}
remote = of_graph_get_remote_port_parent(end_node);
if (!remote) {
DRM_DEBUG_DRIVER("Enable to parse remote node\n");
return ERR_PTR(-EINVAL);
}
return of_drm_find_bridge(remote) ?: ERR_PTR(-EPROBE_DEFER);
}
static int sun4i_tcon_bind(struct device *dev, struct device *master,
void *data)
{
@@ -555,22 +486,11 @@ static int sun4i_tcon_probe(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
struct drm_bridge *bridge;
struct drm_panel *panel;
int ret;
/*
* Neither the bridge or the panel is ready.
* Defer the probe.
*/
panel = sun4i_tcon_find_panel(node);
bridge = sun4i_tcon_find_bridge(node);
/*
* If we don't have a panel endpoint, just go on
*/
if ((PTR_ERR(panel) == -EPROBE_DEFER) &&
(PTR_ERR(bridge) == -EPROBE_DEFER)) {
DRM_DEBUG_DRIVER("Still waiting for our panel/bridge. Deferring...\n");
return -EPROBE_DEFER;
}
ret = drm_of_find_panel_or_bridge(node, 1, 0, &panel, &bridge);
if (ret == -EPROBE_DEFER)
return ret;
return component_add(&pdev->dev, &sun4i_tcon_ops);
}