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video: stm32: ltdc: support new hardware version for STM32MP25 SoC

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STM32MP2 SoCs feature a new version of the LTDC IP.  This new version
features a bus clock, as well as a 150MHz pad frequency.  Add its
compatible to the list of device to probe and handle quirks.  The new
hardware version features a bus clock.

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Acked-by: Yannick Fertre <yannick.fertre@foss.st.com>
Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
This commit is contained in:
Raphael Gallais-Pou
2025-09-04 14:53:08 +02:00
committed by Tom Rini
parent 16cfbbbe2b
commit b3316f6053
1 changed files with 20 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/video/stm32/stm32_ltdc.c
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@@ -262,6 +262,7 @@ static const u32 layer_regs_a2[] = {
#define HWVER_10300 0x010300
#define HWVER_20101 0x020101
#define HWVER_40100 0x040100
#define HWVER_40101 0x040101
enum stm32_ltdc_pix_fmt {
PF_ARGB8888 = 0, /* ARGB [32 bits] */
@@ -529,7 +530,7 @@ static int stm32_ltdc_probe(struct udevice *dev)
struct udevice *bridge = NULL;
struct udevice *panel = NULL;
struct display_timing timings;
struct clk pclk;
struct clk pclk, bclk;
struct reset_ctl rst;
ulong rate;
int ret;
@@ -540,7 +541,21 @@ static int stm32_ltdc_probe(struct udevice *dev)
return -EINVAL;
}
ret = clk_get_by_index(dev, 0, &pclk);
ret = clk_get_by_name(dev, "bus", &bclk);
if (ret) {
if (ret != -ENODATA) {
dev_err(dev, "bus clock get error %d\n", ret);
return ret;
}
} else {
ret = clk_enable(&bclk);
if (ret) {
dev_err(dev, "bus clock enable error %d\n", ret);
return ret;
}
}
ret = clk_get_by_name(dev, "lcd", &pclk);
if (ret) {
dev_err(dev, "peripheral clock get error %d\n", ret);
return ret;
@@ -566,6 +581,7 @@ static int stm32_ltdc_probe(struct udevice *dev)
priv->pix_fmt_hw = pix_fmt_a1;
break;
case HWVER_40100:
case HWVER_40101:
priv->layer_regs = layer_regs_a2;
priv->pix_fmt_hw = pix_fmt_a2;
break;
@@ -688,6 +704,8 @@ static int stm32_ltdc_bind(struct udevice *dev)
static const struct udevice_id stm32_ltdc_ids[] = {
{ .compatible = "st,stm32-ltdc" },
{ .compatible = "st,stm32mp251-ltdc" },
{ .compatible = "st,stm32mp255-ltdc" },
{ }
};