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drm/rockchip: dsi: add support dual dsi

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Signed-off-by: Guochun Huang <hero.huang@rock-chips.com>
Change-Id: I6c929771a7f45c778f84f549e28cea74312ad9b8
This commit is contained in:
Guochun Huang
2021-07-10 15:28:19 +08:00
committed by Tao Huang
parent c65c0584b6
commit 292f792757
1 changed files with 16 additions and 69 deletions
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85
drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
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@@ -879,60 +879,25 @@ static int rockchip_dsi_drm_create_encoder(struct dw_mipi_dsi_rockchip *dsi,
static struct device
*dw_mipi_dsi_rockchip_find_second(struct dw_mipi_dsi_rockchip *dsi)
{
const struct of_device_id *match;
struct device_node *node = NULL, *local;
struct device_node *node = NULL;
struct platform_device *pdev;
struct dw_mipi_dsi_rockchip *dsi2;
match = of_match_device(dsi->dev->driver->of_match_table, dsi->dev);
node = of_parse_phandle(dsi->dev->of_node, "rockchip,dual-channel", 0);
if (node) {
pdev = of_find_device_by_node(node);
if (!pdev)
return ERR_PTR(-EPROBE_DEFER);
local = of_graph_get_remote_node(dsi->dev->of_node, 1, 0);
if (!local)
return NULL;
while ((node = of_find_compatible_node(node, NULL,
match->compatible))) {
struct device_node *remote;
/* found ourself */
if (node == dsi->dev->of_node)
continue;
remote = of_graph_get_remote_node(node, 1, 0);
if (!remote)
continue;
/* same display device in port1-ep0 for both */
if (remote == local) {
struct dw_mipi_dsi_rockchip *dsi2;
struct platform_device *pdev;
pdev = of_find_device_by_node(node);
/*
* we have found the second, so will either return it
* or return with an error. In any case won't need the
* nodes anymore nor continue the loop.
*/
of_node_put(remote);
of_node_put(node);
of_node_put(local);
if (!pdev)
return ERR_PTR(-EPROBE_DEFER);
dsi2 = platform_get_drvdata(pdev);
if (!dsi2) {
platform_device_put(pdev);
return ERR_PTR(-EPROBE_DEFER);
}
return &pdev->dev;
dsi2 = platform_get_drvdata(pdev);
if (!dsi2) {
platform_device_put(pdev);
return ERR_PTR(-EPROBE_DEFER);
}
of_node_put(remote);
return &pdev->dev;
}
of_node_put(local);
return NULL;
}
@@ -943,7 +908,6 @@ static int dw_mipi_dsi_rockchip_bind(struct device *dev,
struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
struct device *second;
bool master1, master2;
int ret;
second = dw_mipi_dsi_rockchip_find_second(dsi);
@@ -951,27 +915,7 @@ static int dw_mipi_dsi_rockchip_bind(struct device *dev,
return PTR_ERR(second);
if (second) {
master1 = of_property_read_bool(dsi->dev->of_node,
"clock-master");
master2 = of_property_read_bool(second->of_node,
"clock-master");
if (master1 && master2) {
DRM_DEV_ERROR(dsi->dev, "only one clock-master allowed\n");
return -EINVAL;
}
if (!master1 && !master2) {
DRM_DEV_ERROR(dsi->dev, "no clock-master defined\n");
return -EINVAL;
}
/* we are the slave in dual-DSI */
if (!master1) {
dsi->is_slave = true;
return 0;
}
dsi->slave = dev_get_drvdata(second);
if (!dsi->slave) {
DRM_DEV_ERROR(dev, "could not get slaves data\n");
@@ -983,6 +927,9 @@ static int dw_mipi_dsi_rockchip_bind(struct device *dev,
put_device(second);
}
if (dsi->is_slave)
return 0;
ret = clk_prepare_enable(dsi->pllref_clk);
if (ret) {
DRM_DEV_ERROR(dev, "Failed to enable pllref_clk: %d\n", ret);