On 8/20/25 18:17, Raphael Gallais-Pou wrote:
> 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.
>
> Signed-off-by: Raphael Gallais-Pou <raphael.gallais-...@foss.st.com>
> ---
> drivers/video/stm32/stm32_ltdc.c | 21 +++++++++++++++++++--
> 1 file changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/video/stm32/stm32_ltdc.c
> b/drivers/video/stm32/stm32_ltdc.c
> index
> 0a062c8939dbe49b11aa50f5ca9701bdbe5c5b0b..d9ba5c4ef53558fe8b5565d47b022699d9e4ea0e
> 100644
> --- a/drivers/video/stm32/stm32_ltdc.c
> +++ b/drivers/video/stm32/stm32_ltdc.c
> @@ -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 +704,7 @@ static int stm32_ltdc_bind(struct udevice *dev)
>
> static const struct udevice_id stm32_ltdc_ids[] = {
> { .compatible = "st,stm32-ltdc" },
> + { .compatible = "st,stm32mp251-ltdc" },
> { }
> };
>
>
Reviewed-by: Patrice Chotard <patrice.chot...@foss.st.com>
Thanks
