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drm/panel: simple: Add 'panel-timing' support

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Fixes: dd03e97b25 ("drm/panel: simple: Get panel-desc data from DT")
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: If018e3dc650def01708bcc0e2672af9506c858c5
This commit is contained in:
Wyon Bi
2021-09-26 16:42:48 +08:00
parent 9b386f8693
commit 2ab2d84fc0
1 changed files with 42 additions and 9 deletions
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51
drivers/gpu/drm/panel/panel-simple.c
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@@ -4533,26 +4533,59 @@ static const struct of_device_id platform_of_match[] = {
};
MODULE_DEVICE_TABLE(of, platform_of_match);
static bool of_child_node_is_present(const struct device_node *node,
const char *name)
{
struct device_node *child;
child = of_get_child_by_name(node, name);
of_node_put(child);
return !!child;
}
static int panel_simple_of_get_desc_data(struct device *dev,
struct panel_desc *desc)
{
struct device_node *np = dev->of_node;
struct drm_display_mode *mode;
u32 bus_flags;
const void *data;
int len;
int err;
mode = devm_kzalloc(dev, sizeof(*mode), GFP_KERNEL);
if (!mode)
return -ENOMEM;
if (of_child_node_is_present(np, "display-timings")) {
struct drm_display_mode *mode;
err = of_get_drm_display_mode(np, mode, &bus_flags, OF_USE_NATIVE_MODE);
if (!err) {
desc->modes = mode;
desc->num_modes = 1;
desc->bus_flags = bus_flags;
mode = devm_kzalloc(dev, sizeof(*mode), GFP_KERNEL);
if (!mode)
return -ENOMEM;
if (!of_get_drm_display_mode(np, mode, &bus_flags,
OF_USE_NATIVE_MODE)) {
desc->modes = mode;
desc->num_modes = 1;
desc->bus_flags = bus_flags;
}
} else if (of_child_node_is_present(np, "panel-timing")) {
struct display_timing *timing;
struct videomode vm;
timing = devm_kzalloc(dev, sizeof(*timing), GFP_KERNEL);
if (!timing)
return -ENOMEM;
if (!of_get_display_timing(np, "panel-timing", timing)) {
desc->timings = timing;
desc->num_timings = 1;
bus_flags = 0;
vm.flags = timing->flags;
drm_bus_flags_from_videomode(&vm, &bus_flags);
desc->bus_flags = bus_flags;
}
}
if (desc->num_modes || desc->num_timings) {
of_property_read_u32(np, "bpc", &desc->bpc);
of_property_read_u32(np, "bus-format", &desc->bus_format);
of_property_read_u32(np, "width-mm", &desc->size.width);