Updates for U-Boot RGxx3

0001-board-rockchip-Make-panel-auto-detect-error-non-fata.patch

[PATCH 1/2] board: rockchip: Make panel auto detect error non fatal

Make the inability to detect a panel using the auto detection code not
fail the entire boot process. This means that if the panel ID cannot
be read we don't set an environment variable for the panel, and if an
environment variable for the panel is not set we don't attempt to
update the compatible string. Changes to the code also ensure that
when there are multiple compatible strings required for the panel
we can use them both.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c | 114 +++++++++++++--------
 1 file changed, 73 insertions(+), 41 deletions(-)

diff --git a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
index 3f1a42d184..7b6860193e 100644
--- a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
+++ b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
@@ -40,6 +40,7 @@ struct rg3xx_model {
 	const char *board;
 	const char *board_name;
 	const char *fdtfile;
+	const bool detect_panel;
 };
 
 enum rgxx3_device_id {
@@ -54,52 +55,66 @@ enum rgxx3_device_id {
 
 static const struct rg3xx_model rg3xx_model_details[] = {
 	[RG353M] = {
-		517, /* Observed average from device */
-		"rk3566-anbernic-rg353m",
-		"RG353M",
-		DTB_DIR "rk3566-anbernic-rg353p.dtb", /* Identical devices */
+		.adc_value = 517, /* Observed average from device */
+		.board = "rk3566-anbernic-rg353m",
+		.board_name = "RG353M",
+		.fdtfile = DTB_DIR "rk3566-anbernic-rg353p.dtb", /* Identical devices */
+		.detect_panel = 1,
 	},
 	[RG353P] = {
-		860, /* Documented value of 860 */
-		"rk3566-anbernic-rg353p",
-		"RG353P",
-		DTB_DIR "rk3566-anbernic-rg353p.dtb",
+		.adc_value = 860, /* Documented value of 860 */
+		.board = "rk3566-anbernic-rg353p",
+		.board_name = "RG353P",
+		.fdtfile = DTB_DIR "rk3566-anbernic-rg353p.dtb",
+		.detect_panel = 1,
 	},
 	[RG353V] = {
-		695, /* Observed average from device */
-		"rk3566-anbernic-rg353v",
-		"RG353V",
-		DTB_DIR "rk3566-anbernic-rg353v.dtb",
+		.adc_value = 695, /* Observed average from device */
+		.board = "rk3566-anbernic-rg353v",
+		.board_name = "RG353V",
+		.fdtfile = DTB_DIR "rk3566-anbernic-rg353v.dtb",
+		.detect_panel = 1,
 	},
 	[RG503] = {
-		1023, /* Observed average from device */
-		"rk3566-anbernic-rg503",
-		"RG503",
-		DTB_DIR "rk3566-anbernic-rg503.dtb",
+		.adc_value = 1023, /* Observed average from device */
+		.board = "rk3566-anbernic-rg503",
+		.board_name = "RG503",
+		.fdtfile = DTB_DIR "rk3566-anbernic-rg503.dtb",
+		.detect_panel = 0,
 	},
 	/* Devices with duplicate ADC value */
 	[RG353PS] = {
-		860, /* Observed average from device */
-		"rk3566-anbernic-rg353ps",
-		"RG353PS",
-		DTB_DIR "rk3566-anbernic-rg353ps.dtb",
+		.adc_value = 860, /* Observed average from device */
+		.board = "rk3566-anbernic-rg353ps",
+		.board_name = "RG353PS",
+		.fdtfile = DTB_DIR "rk3566-anbernic-rg353ps.dtb",
+		.detect_panel = 1,
 	},
 	[RG353VS] = {
-		695, /* Gathered from second hand information */
-		"rk3566-anbernic-rg353vs",
-		"RG353VS",
-		DTB_DIR "rk3566-anbernic-rg353vs.dtb",
+		.adc_value = 695, /* Gathered from second hand information */
+		.board = "rk3566-anbernic-rg353vs",
+		.board_name = "RG353VS",
+		.fdtfile = DTB_DIR "rk3566-anbernic-rg353vs.dtb",
+		.detect_panel = 1,
 	},
 };
 
 struct rg353_panel {
 	const u16 id;
-	const char *panel_compat;
+	const char *panel_compat[2];
 };
 
 static const struct rg353_panel rg353_panel_details[] = {
-	{ .id = 0x3052, .panel_compat = "newvision,nv3051d"},
-	{ .id = 0x3821, .panel_compat = "anbernic,rg353v-panel-v2"},
+	{
+		.id = 0x3052,
+		.panel_compat[0] = "anbernic,rg353p-panel",
+		.panel_compat[1] = "newvision,nv3051d",
+	},
+	{
+		.id = 0x3821,
+		.panel_compat[0] = "anbernic,rg353v-panel-v2",
+		.panel_compat[1] = NULL,
+	},
 };
 
 /*
@@ -298,11 +313,10 @@ int rgxx3_detect_display(void)
 	if (!panel) {
 		printf("Unable to identify panel_id %x\n",
 		       (panel_id[0] << 8) | panel_id[1]);
-		env_set("panel", "unknown");
 		return -EINVAL;
 	}
 
-	env_set("panel", panel->panel_compat);
+	env_set("panel", panel->panel_compat[0]);
 
 	return 0;
 }
@@ -367,13 +381,14 @@ int rgxx3_detect_device(void)
 		rg3xx_model_details[board_id].board_name);
 	env_set("fdtfile", rg3xx_model_details[board_id].fdtfile);
 
-	/* Detect the panel type for any device that isn't a 503. */
-	if (board_id == RG503)
+	/* Skip panel detection for when it is not needed. */
+	if (!rg3xx_model_details[board_id].detect_panel)
 		return 0;
 
+	/* Warn but don't fail for errors in auto-detection of the panel. */
 	ret = rgxx3_detect_display();
 	if (ret)
-		return ret;
+		printf("Failed to detect panel type\n");
 
 	return 0;
 }
@@ -400,7 +415,8 @@ int rk_board_late_init(void)
 
 int ft_board_setup(void *blob, struct bd_info *bd)
 {
-	int node, ret;
+	const struct rg353_panel *panel = NULL;
+	int node, ret, i;
 	char *env;
 
 	/* No fixups necessary for the RG503 */
@@ -414,6 +430,12 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 			    rg3xx_model_details[RG353M].board_name,
 			    sizeof(rg3xx_model_details[RG353M].board_name));
 
+	env = env_get("panel");
+	if (!env) {
+		printf("Can't get panel env\n");
+		return 0;
+	}
+
 	/*
 	 * Check if the environment variable doesn't equal the panel.
 	 * If it doesn't, update the devicetree to the correct panel.
@@ -424,12 +446,6 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 		return -ENODEV;
 	}
 
-	env = env_get("panel");
-	if (!env) {
-		printf("Can't get panel env\n");
-		return -ENODEV;
-	}
-
 	ret = fdt_node_check_compatible(blob, node, env);
 	if (ret < 0)
 		return -ENODEV;
@@ -438,8 +454,24 @@ int ft_board_setup(void *blob, struct bd_info *bd)
 	if (!ret)
 		return 0;
 
-	do_fixup_by_path_string(blob, "/dsi@fe060000/panel@0",
-				"compatible", env);
+	/* Panels don't match, search by first compatible value. */
+	for (i = 0; i < ARRAY_SIZE(rg353_panel_details); i++) {
+		if (!strcmp(env, rg353_panel_details[i].panel_compat[0])) {
+			panel = &rg353_panel_details[i];
+			break;
+		}
+	}
+
+	if (!panel) {
+		printf("Unable to identify panel by compat string\n");
+		return -ENODEV;
+	}
+
+	/* Set the compatible with the auto-detected values */
+	fdt_setprop_string(blob, node, "compatible", panel->panel_compat[0]);
+	if (panel->panel_compat[1])
+		fdt_appendprop_string(blob, node, "compatible",
+				      panel->panel_compat[1]);
 
 	return 0;
 }
-- 
2.34.1

0002-board-rockchip-Add-Maskrom-Mode-for-Anbernic-RGxx3.patch

[PATCH 2/2] board: rockchip: Add Maskrom Mode for Anbernic RGxx3

Add support for users to enter maskrom mode by holding the function
button when they power up the device.

Since the device has soldered eMMC and sometimes does not expose a clk
pin on the mainboard there is a small chance that a user who flashes a
bad bootloader may not be able to recover if the headers themselves
are valid. As a result this check is done during spl_early_init() to
ensure that it runs as early as possible, and it does so by directly
manipulating the ADC hardware in lieu of loading the ADC driver.

Ideally, once we have an open source TPL stage we can move this to
the TPL stage.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c | 64 ++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
index 7b6860193e..92994794cd 100644
--- a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
+++ b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
@@ -6,12 +6,14 @@
 #include <abuf.h>
 #include <adc.h>
 #include <asm/io.h>
+#include <command.h>
 #include <display.h>
 #include <dm.h>
 #include <dm/lists.h>
 #include <env.h>
 #include <fdt_support.h>
 #include <linux/delay.h>
+#include <linux/iopoll.h>
 #include <mipi_dsi.h>
 #include <mmc.h>
 #include <panel.h>
@@ -20,6 +22,8 @@
 #include <stdlib.h>
 #include <video_bridge.h>
 
+#define BOOT_BROM_DOWNLOAD	0xef08a53c
+
 #define GPIO0_BASE		0xfdd60000
 #define GPIO4_BASE		0xfe770000
 #define GPIO_SWPORT_DR_L	0x0000
@@ -33,6 +37,14 @@
 
 #define GPIO_WRITEMASK(bits)	((bits) << 16)
 
+#define SARADC_BASE		0xfe720000
+#define SARADC_DATA		0x0000
+#define SARADC_STAS		0x0004
+#define SARADC_ADC_STATUS	BIT(0)
+#define SARADC_CTRL		0x0008
+#define SARADC_INPUT_SRC_MSK	0x7
+#define SARADC_POWER_CTRL	BIT(3)
+
 #define DTB_DIR			"rockchip/"
 
 struct rg3xx_model {
@@ -117,12 +129,64 @@ static const struct rg353_panel rg353_panel_details[] = {
 	},
 };
 
+/*
+ * The device has internal eMMC, and while some devices have an exposed
+ * clk pin you can ground to force a bypass not all devices do. As a
+ * result it may be possible for some devices to become a perma-brick
+ * if a corrupted TPL or SPL stage with a valid header is flashed to
+ * the internal eMMC. Add functionality to read ADC channel 0 (the func
+ * button) as early as possible in the boot process to provide some
+ * protection against this. If we ever get an open TPL stage, we should
+ * consider moving this function there.
+ */
+void read_func_button(void)
+{
+	int ret;
+	u32 reg;
+
+	/* Turn off SARADC to reset it. */
+	writel(0, (SARADC_BASE + SARADC_CTRL));
+
+	/* Enable channel 0 and power on SARADC. */
+	writel(((0 & SARADC_INPUT_SRC_MSK) | SARADC_POWER_CTRL),
+	       (SARADC_BASE + SARADC_CTRL));
+
+	/*
+	 * Wait for data to be ready. Use timeout of 20000us from
+	 * rockchip_saradc driver.
+	 */
+	ret = readl_poll_timeout((SARADC_BASE + SARADC_STAS), reg,
+				 !(reg & SARADC_ADC_STATUS), 20000);
+	if (ret) {
+		printf("ADC Timeout");
+		return;
+	}
+
+	/* Read the data from the SARADC. */
+	reg = readl((SARADC_BASE + SARADC_DATA));
+
+	/* Turn the SARADC back off so it's ready to be used again. */
+	writel(0, (SARADC_BASE + SARADC_CTRL));
+
+	/*
+	 * If the value is less than 30 the button is being pressed.
+	 * Reset the device back into Rockchip download mode.
+	 */
+	if (reg <= 30) {
+		printf("download key pressed, entering download mode...");
+		writel(BOOT_BROM_DOWNLOAD, CONFIG_ROCKCHIP_BOOT_MODE_REG);
+		do_reset(NULL, 0, 0, NULL);
+	}
+};
+
 /*
  * Start LED very early so user knows device is on. Set color
  * to red.
  */
 void spl_board_init(void)
 {
+	read_func_button();
+
 	/* Set GPIO0_C5, GPIO0_C6, and GPIO0_C7 to output. */
 	writel(GPIO_WRITEMASK(GPIO_C7 | GPIO_C6 | GPIO_C5) | \
 	       (GPIO_C7 | GPIO_C6 | GPIO_C5),
-- 
2.34.1