Test environment
i.MX8MP EVK LVDS0
LVDS-HDMI bridge(it6263)
L5.15.5_1.0.0
Background
Some customers need show logo using LVDS panel.
Current BSP doesn't support LVDS driver in Uboot.
This patch provides i.MX8MPlus LVDS driver support in Uboot.
If you want to connect it to LVDS panel , you need port your lvds panel driver like simple-panel.c
Update
[2022.9.19] Verify on L5.15.32_2.0.0
0001-L5.15.32-Add-i.MX8MP-LVDS-driver-in-uboot
'probe device is failed, ret -2, probe video device failed, ret -19' is caused by below code. It has been merged in attachment.
// /* Only handle devices that have a valid ofnode */
// if (dev_has_ofnode(dev) && !(dev->driver->flags & DM_FLAG_IGNORE_DEFAULT_CLKS)) {
// /*
// * Process 'assigned-{clocks/clock-parents/clock-rates}'
// * properties
// */
// ret = clk_set_defaults(dev, CLK_DEFAULTS_PRE);
// if (ret)
// goto fail;
// }
[2023.3.14] Verify on L5.15.71
0001-L5.15.71-Add-i.MX8MP-LVDS-support-in-uboot
[2023.9.12]
For some panel with low DE, you need uncomment CTRL_INV_DE line and set this bit to 1.
#include <linux/string.h>
@@ -110,9 +111,8 @@ static void lcdifv3_set_mode(struct lcdifv3_priv *priv,
writel(CTRL_INV_HS, (ulong)(priv->reg_base + LCDIFV3_CTRL_SET));
/* SEC MIPI DSI specific */
- writel(CTRL_INV_PXCK, (ulong)(priv->reg_base + LCDIFV3_CTRL_CLR));
- writel(CTRL_INV_DE, (ulong)(priv->reg_base + LCDIFV3_CTRL_CLR));
-
+ //writel(CTRL_INV_PXCK, (ulong)(priv->reg_base + LCDIFV3_CTRL_CLR));
+ //writel(CTRL_INV_DE, (ulong)(priv->reg_base + LCDIFV3_CTRL_CLR));
}
