[PATCH] board: rockchip: Add Support for RG353PS and Panel Auto Detection
Chris Morgan
macroalpha82 at gmail.com
Fri May 12 18:34:11 CEST 2023
From: Chris Morgan <macromorgan at hotmail.com>
Add support for panel auto detection for the Anbernic RGxx3 series.
This requires us to probe the DSI and DSI-DPHY controllers so that
we may send a MIPI_DCS_GET_DISPLAY_ID command to the panel to find
out which panel we are running. This requires creating a kind of
"skeleton" driver for the panel so we have just enough information
about it to issue the necessary command.
Once the panel type is determined the panel type is saved as an
environment variable, and additionally the panel compatible string
is automatically fixed-up in the devicetree if it is found to be
incompatible. There is a table of panel IDs and compatible strings,
support for a new panel only requires knowing the ID and the string.
Additionally, the device auto detection was changed so that it
mimicks the panel auto detection, requiring only defining a few
new values to add support for a new compatible board. This is done
while also adding a new board, the RG353PS.
Tested the auto detection on an RG353P, RG353PS (2nd revision panel),
RG353V, RG353V (2nd revision panel), RG353M, and RG503. As long as
the correct devicetrees were located in ${boot}/rockchip/. U-Boot
was able to automatically detect the correct board and panel and
boot each device correctly.
Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
---
.../arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi | 10 +
board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c | 322 +++++++++++++++---
configs/anbernic-rgxx3_defconfig | 15 +
3 files changed, 307 insertions(+), 40 deletions(-)
diff --git a/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi b/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
index a18e5d1cf7..f986e1941e 100644
--- a/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
+++ b/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
@@ -46,7 +46,17 @@
<&pmucru CLK_RTC32K_FRAC>;
};
+&dsi_dphy0 {
+ status = "okay";
+};
+
+&dsi0 {
+ status = "okay";
+};
+
&i2c2 {
+ pinctrl-0 = <&i2c2m1_xfer>;
+ pinctrl-names = "default";
status = "okay";
};
diff --git a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
index decc46db78..027f4872bb 100644
--- a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
+++ b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
@@ -6,25 +6,37 @@
#include <abuf.h>
#include <adc.h>
#include <asm/io.h>
+#include <display.h>
#include <dm.h>
+#include <dm/lists.h>
+#include <env.h>
+#include <fdt_support.h>
#include <linux/delay.h>
+#include <mipi_dsi.h>
+#include <mmc.h>
+#include <panel.h>
#include <pwm.h>
#include <rng.h>
#include <stdlib.h>
-#include <mmc.h>
-#include <env.h>
+#include <video_bridge.h>
#define GPIO0_BASE 0xfdd60000
+#define GPIO4_BASE 0xfe770000
+#define GPIO_SWPORT_DR_L 0x0000
#define GPIO_SWPORT_DR_H 0x0004
+#define GPIO_SWPORT_DDR_L 0x0008
#define GPIO_SWPORT_DDR_H 0x000c
-#define GPIO_A5 BIT(5)
-#define GPIO_A6 BIT(6)
+#define GPIO_A0 BIT(0)
+#define GPIO_C5 BIT(5)
+#define GPIO_C6 BIT(6)
+#define GPIO_C7 BIT(7)
#define GPIO_WRITEMASK(bits) ((bits) << 16)
#define DTB_DIR "rockchip/"
struct rg3xx_model {
+ const u16 adc_value;
const char *board;
const char *board_name;
const char *fdtfile;
@@ -34,49 +46,74 @@ enum rgxx3_device_id {
RG353M,
RG353P,
RG353V,
- RG353VS,
RG503,
+ /* Devices with duplicate ADC value */
+ RG353PS,
+ RG353VS,
};
static const struct rg3xx_model rg3xx_model_details[] = {
[RG353M] = {
+ 517, /* Observed average from device */
"rk3566-anbernic-rg353m",
"RG353M",
- DTB_DIR "rk3566-anbernic-rg353m.dtb",
+ DTB_DIR "rk3566-anbernic-rg353p.dtb", /* Identical devices */
},
[RG353P] = {
+ 860, /* Documented value of 860 */
"rk3566-anbernic-rg353p",
"RG353P",
DTB_DIR "rk3566-anbernic-rg353p.dtb",
},
[RG353V] = {
+ 695, /* Observed average from device */
"rk3566-anbernic-rg353v",
"RG353V",
DTB_DIR "rk3566-anbernic-rg353v.dtb",
},
- [RG353VS] = {
- "rk3566-anbernic-rg353vs",
- "RG353VS",
- DTB_DIR "rk3566-anbernic-rg353vs.dtb",
- },
[RG503] = {
+ 1023, /* Observed average from device */
"rk3566-anbernic-rg503",
"RG503",
DTB_DIR "rk3566-anbernic-rg503.dtb",
},
+ /* Devices with duplicate ADC value */
+ [RG353PS] = {
+ 860, /* Gathered from second hand information */
+ "rk3566-anbernic-rg353ps",
+ "RG353PS",
+ DTB_DIR "rk3566-anbernic-rg353ps.dtb",
+ },
+ [RG353VS] = {
+ 695, /* Gathered from second hand information */
+ "rk3566-anbernic-rg353vs",
+ "RG353VS",
+ DTB_DIR "rk3566-anbernic-rg353vs.dtb",
+ },
+};
+
+struct rg353_panel {
+ const u16 id;
+ const char *panel_compat;
+};
+
+static const struct rg353_panel rg353_panel_details[] = {
+ { .id = 0x3052, .panel_compat = "newvision,nv3051d"},
+ { .id = 0x3821, .panel_compat = "anbernic,rg353v-panel-v2"},
};
/*
* Start LED very early so user knows device is on. Set color
- * to amber.
+ * to red.
*/
void spl_board_init(void)
{
- /* Set GPIO0_A5 and GPIO0_A6 to output. */
- writel(GPIO_WRITEMASK(GPIO_A6 | GPIO_A5) | (GPIO_A6 | GPIO_A5),
+ /* 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),
(GPIO0_BASE + GPIO_SWPORT_DDR_H));
- /* Set GPIO0_A5 to 0 and GPIO0_A6 to 1. */
- writel(GPIO_WRITEMASK(GPIO_A6 | GPIO_A5) | GPIO_A6,
+ /* Set GPIO0_C5 and GPIO_C6 to 0 and GPIO0_C7 to 1. */
+ writel(GPIO_WRITEMASK(GPIO_C7 | GPIO_C6 | GPIO_C5) | GPIO_C7,
(GPIO0_BASE + GPIO_SWPORT_DR_H));
}
@@ -126,15 +163,159 @@ void __maybe_unused startup_buzz(void)
pwm_set_enable(dev, 0, 0);
}
+/*
+ * Provide the bare minimum to identify the panel for the RG353
+ * series. Since we don't have a working framebuffer device, no
+ * need to init the panel; just identify it and provide the
+ * clocks so we know what to set the different clock values to.
+ */
+
+static const struct display_timing rg353_default_timing = {
+ .pixelclock.typ = 24150000,
+ .hactive.typ = 640,
+ .hfront_porch.typ = 40,
+ .hback_porch.typ = 80,
+ .hsync_len.typ = 2,
+ .vactive.typ = 480,
+ .vfront_porch.typ = 18,
+ .vback_porch.typ = 28,
+ .vsync_len.typ = 2,
+ .flags = DISPLAY_FLAGS_HSYNC_HIGH |
+ DISPLAY_FLAGS_VSYNC_HIGH,
+};
+
+static int anbernic_rg353_panel_get_timing(struct udevice *dev,
+ struct display_timing *timings)
+{
+ memcpy(timings, &rg353_default_timing, sizeof(*timings));
+
+ return 0;
+}
+
+static int anbernic_rg353_panel_probe(struct udevice *dev)
+{
+ struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
+
+ plat->lanes = 4;
+ plat->format = MIPI_DSI_FMT_RGB888;
+ plat->mode_flags = MIPI_DSI_MODE_VIDEO |
+ MIPI_DSI_MODE_VIDEO_BURST |
+ MIPI_DSI_MODE_EOT_PACKET |
+ MIPI_DSI_MODE_LPM;
+
+ return 0;
+}
+
+static const struct panel_ops anbernic_rg353_panel_ops = {
+ .get_display_timing = anbernic_rg353_panel_get_timing,
+};
+
+U_BOOT_DRIVER(anbernic_rg353_panel) = {
+ .name = "anbernic_rg353_panel",
+ .id = UCLASS_PANEL,
+ .ops = &anbernic_rg353_panel_ops,
+ .probe = anbernic_rg353_panel_probe,
+ .plat_auto = sizeof(struct mipi_dsi_panel_plat),
+};
+
+int rgxx3_detect_display(void)
+{
+ struct udevice *dev;
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_panel_plat *mplat;
+ const struct rg353_panel *panel;
+ int ret = 0;
+ int i;
+ u8 panel_id[2];
+
+ /*
+ * Take panel out of reset status.
+ * Set GPIO4_A0 to output.
+ */
+ writel(GPIO_WRITEMASK(GPIO_A0) | GPIO_A0,
+ (GPIO4_BASE + GPIO_SWPORT_DDR_L));
+ /* Set GPIO4_A0 to 1. */
+ writel(GPIO_WRITEMASK(GPIO_A0) | GPIO_A0,
+ (GPIO4_BASE + GPIO_SWPORT_DR_L));
+
+ /* Probe the DSI controller. */
+ ret = uclass_get_device_by_name(UCLASS_VIDEO_BRIDGE,
+ "dsi at fe060000", &dev);
+ if (ret) {
+ printf("DSI host not probed: %d\n", ret);
+ return ret;
+ }
+
+ /* Probe the DSI panel. */
+ ret = device_bind_driver_to_node(dev, "anbernic_rg353_panel",
+ "anbernic_rg353_panel",
+ dev_ofnode(dev), NULL);
+ if (ret) {
+ printf("Failed to probe RG353 panel: %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Attach the DSI controller which will also probe and attach
+ * the DSIDPHY.
+ */
+ ret = video_bridge_attach(dev);
+ if (ret) {
+ printf("Failed to attach DSI controller: %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * Get the panel which should have already been probed by the
+ * video_bridge_attach() function.
+ */
+ ret = uclass_first_device_err(UCLASS_PANEL, &dev);
+ if (ret) {
+ printf("Panel device error: %d\n", ret);
+ return ret;
+ }
+
+ /* Now call the panel via DSI commands to get the panel ID. */
+ mplat = dev_get_plat(dev);
+ dsi = mplat->device;
+ mipi_dsi_set_maximum_return_packet_size(dsi, sizeof(panel_id));
+ ret = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_ID, &panel_id,
+ sizeof(panel_id));
+ if (ret < 0) {
+ printf("Unable to read panel ID: %d\n", ret);
+ return ret;
+ }
+
+ /* Get the correct panel compatible from the table. */
+ for (i = 0; i < ARRAY_SIZE(rg353_panel_details); i++) {
+ if (rg353_panel_details[i].id == ((panel_id[0] << 8) |
+ panel_id[1])) {
+ panel = &rg353_panel_details[i];
+ break;
+ }
+ }
+
+ 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);
+
+ return 0;
+}
+
/* Detect which Anbernic RGXX3 device we are using so as to load the
* correct devicetree for Linux. Set an environment variable once
* found. The detection depends on the value of ADC channel 1, the
- * presence of an eMMC on mmc0, and querying the DSI panel (TODO).
+ * presence of an eMMC on mmc0, and querying the DSI panel.
*/
int rgxx3_detect_device(void)
{
u32 adc_info;
- int ret;
+ int ret, i;
int board_id = -ENXIO;
struct mmc *mmc;
@@ -144,30 +325,37 @@ int rgxx3_detect_device(void)
return ret;
}
- /* Observed value 517. */
- if (adc_info > 505 && adc_info < 530)
- board_id = RG353M;
- /* Observed value 695. */
- if (adc_info > 680 && adc_info < 710)
- board_id = RG353V;
- /* Documented value 860. */
- if (adc_info > 850 && adc_info < 870)
- board_id = RG353P;
- /* Observed value 1023. */
- if (adc_info > 1010)
- board_id = RG503;
+ /*
+ * Get the correct device from the table. The ADC value is
+ * determined by a resistor on ADC channel 0. The hardware
+ * design calls for no more than a 1% variance on the
+ * resistor, so assume a +- value of 15 should be enough.
+ */
+ for (i = 0; i < ARRAY_SIZE(rg3xx_model_details); i++) {
+ u32 adc_min = rg3xx_model_details[i].adc_value - 15;
+ u32 adc_max = rg3xx_model_details[i].adc_value + 15;
+
+ if (adc_min < adc_info && adc_max > adc_info) {
+ board_id = i;
+ break;
+ }
+ }
/*
- * Try to access the eMMC on an RG353V. If it's missing, it's
- * an RG353VS. Note we could also check for a touchscreen at
- * 0x1a on i2c2.
+ * Try to access the eMMC on an RG353V or RG353P. If it's
+ * missing, it's an RG353VS or RG353PS. Note we could also
+ * check for a touchscreen at 0x1a on i2c2.
*/
- if (board_id == RG353V) {
+ if (board_id == RG353V || board_id == RG353P) {
mmc = find_mmc_device(0);
if (mmc) {
ret = mmc_init(mmc);
- if (ret)
- board_id = RG353VS;
+ if (ret) {
+ if (board_id == RG353V)
+ board_id = RG353VS;
+ else
+ board_id = RG353PS;
+ }
}
}
@@ -179,6 +367,14 @@ 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)
+ return 0;
+
+ ret = rgxx3_detect_display();
+ if (ret)
+ return ret;
+
return 0;
}
@@ -186,18 +382,64 @@ int rk_board_late_init(void)
{
int ret;
- /* Turn off orange LED and turn on green LED. */
- writel(GPIO_WRITEMASK(GPIO_A6 | GPIO_A5) | GPIO_A5,
- (GPIO0_BASE + GPIO_SWPORT_DR_H));
-
ret = rgxx3_detect_device();
if (ret) {
printf("Unable to detect device type: %d\n", ret);
return ret;
}
+ /* Turn off red LED and turn on orange LED. */
+ writel(GPIO_WRITEMASK(GPIO_C7 | GPIO_C6 | GPIO_C5) | GPIO_C6,
+ (GPIO0_BASE + GPIO_SWPORT_DR_H));
+
if (IS_ENABLED(CONFIG_DM_PWM))
startup_buzz();
return 0;
}
+
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+ int node, ret;
+ char *env;
+
+ /* No fixups necessary for the RG503 */
+ env = env_get("board_name");
+ if (env && (!strcmp(env, rg3xx_model_details[RG503].board_name)))
+ return 0;
+
+ /* Change the model name of the RG353M */
+ if (env && (!strcmp(env, rg3xx_model_details[RG353M].board_name)))
+ fdt_setprop(blob, 0, "model",
+ rg3xx_model_details[RG353M].board_name,
+ sizeof(rg3xx_model_details[RG353M].board_name));
+
+ /*
+ * Check if the environment variable doesn't equal the panel.
+ * If it doesn't, update the devicetree to the correct panel.
+ */
+ node = fdt_path_offset(blob, "/dsi at fe060000/panel at 0");
+ if (!(node > 0)) {
+ printf("Can't find the DSI node\n");
+ 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;
+
+ /* Panels match, return 0. */
+ if (!ret)
+ return 0;
+
+ do_fixup_by_path_string(blob, "/dsi at fe060000/panel at 0",
+ "compatible", env);
+
+ return 0;
+}
diff --git a/configs/anbernic-rgxx3_defconfig b/configs/anbernic-rgxx3_defconfig
index b17e917914..ed6643d9d4 100644
--- a/configs/anbernic-rgxx3_defconfig
+++ b/configs/anbernic-rgxx3_defconfig
@@ -12,6 +12,7 @@ CONFIG_DEFAULT_DEVICE_TREE="rk3566-anbernic-rgxx3"
CONFIG_ROCKCHIP_RK3568=y
CONFIG_SPL_ROCKCHIP_BACK_TO_BROM=y
CONFIG_SPL_ROCKCHIP_COMMON_BOARD=y
+CONFIG_ROCKCHIP_RK8XX_DISABLE_BOOT_ON_POWERON=y
CONFIG_SPL_MMC=y
CONFIG_SPL_SERIAL=y
CONFIG_SPL_STACK_R_ADDR=0x600000
@@ -24,9 +25,13 @@ CONFIG_DEBUG_UART=y
CONFIG_FIT=y
CONFIG_FIT_VERBOSE=y
CONFIG_SPL_LOAD_FIT=y
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_OF_STDOUT_VIA_ALIAS=y
CONFIG_DEFAULT_FDT_FILE="rockchip/rk3566-anbernic-rgxx3.dtb"
+# CONFIG_CONSOLE_MUX is not set
# CONFIG_DISPLAY_CPUINFO is not set
CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_BOARD_RNG_SEED=y
CONFIG_SPL_MAX_SIZE=0x20000
CONFIG_SPL_PAD_TO=0x7f8000
CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
@@ -41,6 +46,7 @@ CONFIG_CMD_PWM=y
CONFIG_CMD_GPT=y
CONFIG_CMD_MMC=y
# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_CLS is not set
# CONFIG_SPL_DOS_PARTITION is not set
CONFIG_SPL_OF_CONTROL=y
CONFIG_OF_LIVE=y
@@ -60,6 +66,7 @@ CONFIG_MMC_DW_ROCKCHIP=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_SDMA=y
CONFIG_MMC_SDHCI_ROCKCHIP=y
+CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY=y
CONFIG_DM_PMIC=y
CONFIG_DM_PMIC_FAN53555=y
CONFIG_PMIC_RK8XX=y
@@ -69,10 +76,18 @@ CONFIG_REGULATOR_RK8XX=y
CONFIG_DM_REGULATOR_SCMI=y
CONFIG_PWM_ROCKCHIP=y
CONFIG_SPL_RAM=y
+# CONFIG_RAM_ROCKCHIP_DEBUG is not set
+CONFIG_DM_RNG=y
+CONFIG_RNG_ROCKCHIP=y
+# CONFIG_RNG_SMCCC_TRNG is not set
CONFIG_BAUDRATE=1500000
CONFIG_DEBUG_UART_SHIFT=2
CONFIG_SYS_NS16550_MEM32=y
CONFIG_SYSRESET=y
+CONFIG_VIDEO=y
+CONFIG_VIDEO_ROCKCHIP=y
+CONFIG_DISPLAY_ROCKCHIP_DW_MIPI=y
+CONFIG_VIDEO_BRIDGE=y
CONFIG_REGEX=y
CONFIG_ERRNO_STR=y
# CONFIG_EFI_LOADER is not set
--
2.34.1
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