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video: ti: am335x: Support OF graph

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Add support for OF graph parsing. When using OF graph the default
tilcdc_panel_info is used which is the same as defined in Linux.

Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@baylibre.com>
This commit is contained in:
Markus Schneider-Pargmann (TI.com) 2026-01-05 10:36:29 +01:00 committed by Tom Rini
parent fe2547b78d
commit de3f687e6e
1 changed files with 38 additions and 8 deletions
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46
drivers/video/ti/tilcdc.c
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@ -6,6 +6,7 @@
#include <clk.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/ofnode_graph.h>
#include <log.h>
#include <panel.h>
#include <video.h>
@ -113,6 +114,18 @@ struct tilcdc_priv {
DECLARE_GLOBAL_DATA_PTR;
static const struct tilcdc_panel_info tilcdc_panel_info_default = {
.ac_bias = 255,
.ac_bias_intrpt = 0,
.dma_burst_sz = 16,
.bpp = 16,
.fdd = 0x80,
.tft_alt_mode = 0,
.sync_edge = 0,
.sync_ctrl = 1,
.raster_order = 0,
};
static ulong tilcdc_set_pixel_clk_rate(struct udevice *dev, ulong rate)
{
struct tilcdc_priv *priv = dev_get_priv(dev);
@ -173,6 +186,8 @@ static int tilcdc_probe(struct udevice *dev)
struct udevice *panel, *clk_dev;
struct tilcdc_panel_info info;
struct display_timing timing;
bool is_legacy_panel = false;
ofnode remote;
ulong rate;
u32 reg;
int err;
@ -181,10 +196,21 @@ static int tilcdc_probe(struct udevice *dev)
if (!(gd->flags & GD_FLG_RELOC))
return 0;
err = uclass_get_device(UCLASS_PANEL, 0, &panel);
if (err) {
dev_err(dev, "failed to get panel\n");
return err;
/* Try using remote node first, then fall back to using UCLASS_PANEL */
remote = ofnode_graph_get_remote_node(dev_ofnode(dev), -1, -1);
if (ofnode_valid(remote)) {
err = uclass_get_device_by_ofnode(UCLASS_PANEL, remote, &panel);
if (err) {
dev_err(dev, "failed to get panel via OF graph\n");
return err;
}
} else {
err = uclass_get_device(UCLASS_PANEL, 0, &panel);
if (err) {
dev_err(dev, "failed to get panel\n");
return err;
}
is_legacy_panel = true;
}
err = panel_get_display_timing(panel, &timing);
@ -205,10 +231,14 @@ static int tilcdc_probe(struct udevice *dev)
if (timing.vactive.typ > LCDC_MAX_HEIGHT)
timing.vactive.typ = LCDC_MAX_HEIGHT;
err = tilcdc_panel_get_display_info(panel, &info);
if (err) {
dev_err(dev, "failed to get panel info\n");
return err;
if (is_legacy_panel) {
err = tilcdc_panel_get_display_info(panel, &info);
if (err) {
dev_err(dev, "failed to get panel info\n");
return err;
}
} else {
info = tilcdc_panel_info_default;
}
switch (info.bpp) {