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imx: ventana: update LVDS support

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Enable LVDS display detection and panel-specific configuration

Make I2C based LVDS detection and configuration model specific:
- not all boards support LVDS connectors; fail detection that do not
  support LVDS to avoid misdetecting an I2C device as a display
- GPIO configuration is panel specific; use panel name where needed

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
This commit is contained in:
Tim Harvey 2021-09-29 15:04:21 -07:00 committed by Stefano Babic
parent d75ebf3482
commit 397d697fd4
1 changed files with 42 additions and 17 deletions
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59
board/gateworks/gw_ventana/gw_ventana.c
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@ -158,25 +158,54 @@ static void enable_hdmi(struct display_info_t const *dev)
imx_enable_hdmi_phy();
}
static int detect_i2c(struct display_info_t const *dev)
static int detect_lvds(struct display_info_t const *dev)
{
/* only the following boards support LVDS connectors */
switch (board_type) {
case GW52xx:
case GW53xx:
case GW54xx:
case GW560x:
case GW5905:
case GW5909:
break;
default:
return 0;
}
return i2c_set_bus_num(dev->bus) == 0 &&
i2c_probe(dev->addr) == 0;
}
static void enable_lvds(struct display_info_t const *dev)
{
struct iomuxc *iomux = (struct iomuxc *)
IOMUXC_BASE_ADDR;
struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
/* set CH0 data width to 24bit (IOMUXC_GPR2:5 0=18bit, 1=24bit) */
u32 reg = readl(&iomux->gpr[2]);
reg |= IOMUXC_GPR2_DATA_WIDTH_CH0_24BIT;
writel(reg, &iomux->gpr[2]);
/* Enable Backlight */
gpio_request(IMX_GPIO_NR(1, 10), "bklt_gpio");
gpio_direction_output(IMX_GPIO_NR(1, 10), 0);
/* Configure GPIO */
switch (board_type) {
case GW52xx:
case GW53xx:
case GW54xx:
if (!strncmp(dev->mode.name, "Hannstar", 8)) {
SETUP_IOMUX_PAD(PAD_SD2_CLK__GPIO1_IO10 | DIO_PAD_CFG);
gpio_request(IMX_GPIO_NR(1, 10), "cabc");
gpio_direction_output(IMX_GPIO_NR(1, 10), 0);
} else if (!strncmp(dev->mode.name, "DLC", 3)) {
SETUP_IOMUX_PAD(PAD_SD2_CLK__GPIO1_IO10 | DIO_PAD_CFG);
gpio_request(IMX_GPIO_NR(1, 10), "touch_rst#");
gpio_direction_output(IMX_GPIO_NR(1, 10), 1);
}
break;
default:
break;
}
/* Configure backlight */
gpio_request(IMX_GPIO_NR(1, 18), "bklt_en");
SETUP_IOMUX_PAD(PAD_SD1_CMD__GPIO1_IO18 | DIO_PAD_CFG);
gpio_direction_output(IMX_GPIO_NR(1, 18), 1);
@ -208,7 +237,7 @@ struct display_info_t const displays[] = {{
.bus = 2,
.addr = 0x4,
.pixfmt = IPU_PIX_FMT_LVDS666,
.detect = detect_i2c,
.detect = detect_lvds,
.enable = enable_lvds,
.mode = {
.name = "Hannstar-XGA",
@ -228,7 +257,7 @@ struct display_info_t const displays[] = {{
/* DLC700JMG-T-4 */
.bus = 2,
.addr = 0x38,
.detect = NULL,
.detect = detect_lvds,
.enable = enable_lvds,
.pixfmt = IPU_PIX_FMT_LVDS666,
.mode = {
@ -247,9 +276,9 @@ struct display_info_t const displays[] = {{
.vmode = FB_VMODE_NONINTERLACED
} }, {
/* DLC0700XDP21LF-C-1 */
.bus = 0,
.addr = 0,
.detect = NULL,
.bus = 2,
.addr = 0x38,
.detect = detect_lvds,
.enable = enable_lvds,
.pixfmt = IPU_PIX_FMT_LVDS666,
.mode = {
@ -270,7 +299,7 @@ struct display_info_t const displays[] = {{
/* DLC800FIG-T-3 */
.bus = 2,
.addr = 0x14,
.detect = NULL,
.detect = detect_lvds,
.enable = enable_lvds,
.pixfmt = IPU_PIX_FMT_LVDS666,
.mode = {
@ -290,7 +319,7 @@ struct display_info_t const displays[] = {{
} }, {
.bus = 2,
.addr = 0x5d,
.detect = detect_i2c,
.detect = detect_lvds,
.enable = enable_lvds,
.pixfmt = IPU_PIX_FMT_LVDS666,
.mode = {
@ -358,10 +387,6 @@ static void setup_display(void)
| (IOMUXC_GPR3_MUX_SRC_IPU1_DI0
<<IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET);
writel(reg, &iomux->gpr[3]);
/* LVDS Backlight GPIO on LVDS connector - output low */
SETUP_IOMUX_PAD(PAD_SD2_CLK__GPIO1_IO10 | DIO_PAD_CFG);
gpio_direction_output(IMX_GPIO_NR(1, 10), 0);
}
#endif /* CONFIG_VIDEO_IPUV3 */