*/
#include <config.h>
+#include <dm.h>
#include <common.h>
+#include <display.h>
+#include <fdtdec.h>
+#include <libfdt.h>
#include <malloc.h>
+#include <video_bridge.h>
#include <linux/compat.h>
#include <linux/err.h>
#include <asm/arch/clk.h>
#include <asm/arch/cpu.h>
#include <asm/arch/dp_info.h>
#include <asm/arch/dp.h>
+#include <asm/arch/pinmux.h>
#include <asm/arch/power.h>
-#include <fdtdec.h>
-#include <libfdt.h>
#include "exynos_dp_lowlevel.h"
return ret;
}
-int exynos_dp_parse_dt(const void *blob, struct exynos_dp_priv *priv)
+static int exynos_dp_ofdata_to_platdata(struct udevice *dev)
{
- unsigned int node = fdtdec_next_compatible(blob, 0,
- COMPAT_SAMSUNG_EXYNOS5_DP);
- if (node <= 0) {
- debug("exynos_dp: Can't get device node for dp\n");
- return -ENODEV;
- }
+ struct exynos_dp_priv *priv = dev_get_priv(dev);
+ const void *blob = gd->fdt_blob;
+ unsigned int node = dev->of_offset;
+ fdt_addr_t addr;
+ addr = dev_get_addr(dev);
+ if (addr == FDT_ADDR_T_NONE) {
+ debug("Can't get the DP base address\n");
+ return -EINVAL;
+ }
+ priv->regs = (struct exynos_dp *)addr;
priv->disp_info.h_res = fdtdec_get_int(blob, node,
"samsung,h-res", 0);
priv->disp_info.h_sync_width = fdtdec_get_int(blob, node,
return 0;
}
-unsigned int exynos_init_dp(void)
+static int exynos_dp_bridge_init(struct udevice *dev)
{
- unsigned int ret;
- struct exynos_dp_priv *priv;
- struct exynos_dp *regs;
- int node;
+ const int max_tries = 10;
+ int num_tries;
+ int ret;
- priv = kzalloc(sizeof(struct exynos_dp_priv), GFP_KERNEL);
- if (!priv) {
- debug("failed to allocate edp device object.\n");
- return -EFAULT;
+ debug("%s\n", __func__);
+ ret = video_bridge_attach(dev);
+ if (ret) {
+ debug("video bridge init failed: %d\n", ret);
+ return ret;
}
- if (exynos_dp_parse_dt(gd->fdt_blob, priv))
- debug("unable to parse DP DT node\n");
+ /*
+ * We need to wait for 90ms after bringing up the bridge since there
+ * is a phantom "high" on the HPD chip during its bootup. The phantom
+ * high comes within 7ms of de-asserting PD and persists for at least
+ * 15ms. The real high comes roughly 50ms after PD is de-asserted. The
+ * phantom high makes it hard for us to know when the NXP chip is up.
+ */
+ mdelay(90);
- node = fdtdec_next_compatible(gd->fdt_blob, 0,
- COMPAT_SAMSUNG_EXYNOS5_DP);
- if (node <= 0)
- debug("exynos_dp: Can't get device node for dp\n");
+ for (num_tries = 0; num_tries < max_tries; num_tries++) {
+ /* Check HPD. If it's high, or we don't have it, all is well */
+ ret = video_bridge_check_attached(dev);
+ if (!ret || ret == -ENOENT)
+ return 0;
- regs = (struct exynos_dp *)fdtdec_get_addr(gd->fdt_blob, node,
- "reg");
- if (regs == NULL)
- debug("Can't get the DP base address\n");
+ debug("%s: eDP bridge failed to come up; try %d of %d\n",
+ __func__, num_tries, max_tries);
+ }
+
+ /* Immediately go into bridge reset if the hp line is not high */
+ return -EIO;
+}
+
+static int exynos_dp_bridge_setup(const void *blob)
+{
+ const int max_tries = 2;
+ int num_tries;
+ struct udevice *dev;
+ int ret;
+
+ /* Configure I2C registers for Parade bridge */
+ ret = uclass_get_device(UCLASS_VIDEO_BRIDGE, 0, &dev);
+ if (ret) {
+ debug("video bridge init failed: %d\n", ret);
+ return ret;
+ }
+
+ if (strncmp(dev->driver->name, "parade", 6)) {
+ /* Mux HPHPD to the special hotplug detect mode */
+ exynos_pinmux_config(PERIPH_ID_DPHPD, 0);
+ }
+
+ for (num_tries = 0; num_tries < max_tries; num_tries++) {
+ ret = exynos_dp_bridge_init(dev);
+ if (!ret)
+ return 0;
+ if (num_tries == max_tries - 1)
+ break;
+
+ /*
+ * If we're here, the bridge chip failed to initialise.
+ * Power down the bridge in an attempt to reset.
+ */
+ video_bridge_set_active(dev, false);
+
+ /*
+ * Arbitrarily wait 300ms here with DP_N low. Don't know for
+ * sure how long we should wait, but we're being paranoid.
+ */
+ mdelay(300);
+ }
+ return ret;
+}
+int exynos_dp_enable(struct udevice *dev, int panel_bpp,
+ const struct display_timing *timing)
+{
+ struct exynos_dp_priv *priv = dev_get_priv(dev);
+ struct exynos_dp *regs = priv->regs;
+ unsigned int ret;
+
+ debug("%s: start\n", __func__);
exynos_dp_disp_info(&priv->disp_info);
+ ret = exynos_dp_bridge_setup(gd->fdt_blob);
+ if (ret && ret != -ENODEV)
+ printf("LCD bridge failed to enable: %d\n", ret);
+
exynos_dp_phy_ctrl(1);
ret = exynos_dp_init_dp(regs);
return ret;
}
+
+
+static const struct dm_display_ops exynos_dp_ops = {
+ .enable = exynos_dp_enable,
+};
+
+static const struct udevice_id exynos_dp_ids[] = {
+ { .compatible = "samsung,exynos5-dp" },
+ { }
+};
+
+U_BOOT_DRIVER(exynos_dp) = {
+ .name = "eexynos_dp",
+ .id = UCLASS_DISPLAY,
+ .of_match = exynos_dp_ids,
+ .ops = &exynos_dp_ops,
+ .ofdata_to_platdata = exynos_dp_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct exynos_dp_priv),
+};
projects / oweals / u-boot.git / blobdiff