[U-Boot] [PATCH v3 1/3] rockchip: video: mipi: Add rk3288 soc specific driver for mipi dsi
Eric Gao
eric.gao at rock-chips.com
Wed Jun 21 03:22:01 UTC 2017
Add rk3288 soc specific driver for mipi dsi.
Signed-off-by: Eric Gao <eric.gao at rock-chips.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
Changes in v2:
-Cancel the force convert for dev_read_addr return value type.
-Change regs type from "void __iomem" to "uintptr_t".
Changes in v1:
-Change function name from rk_display_enable to rk_mipi_enable.
-Use IS_ERR to judge the return status.
-Use dev_read_addr to replace devfdt_get_addr.
drivers/video/rockchip/rk3288_mipi.c | 191 +++++++++++++++++++++++++++++++++++
drivers/video/rockchip/rk_mipi.h | 2 +-
2 files changed, 192 insertions(+), 1 deletion(-)
create mode 100644 drivers/video/rockchip/rk3288_mipi.c
diff --git a/drivers/video/rockchip/rk3288_mipi.c b/drivers/video/rockchip/rk3288_mipi.c
new file mode 100644
index 0000000..953b47f
--- /dev/null
+++ b/drivers/video/rockchip/rk3288_mipi.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ * Author: Eric Gao <eric.gao at rock-chips.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <display.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <panel.h>
+#include <regmap.h>
+#include "rk_mipi.h"
+#include <syscon.h>
+#include <asm/gpio.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <dm/uclass-internal.h>
+#include <linux/kernel.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/cru_rk3288.h>
+#include <asm/arch/grf_rk3288.h>
+#include <asm/arch/rockchip_mipi_dsi.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define MHz 1000000
+
+/* Select mipi dsi source, big or little vop */
+static int rk_mipi_dsi_source_select(struct udevice *dev)
+{
+ struct rk_mipi_priv *priv = dev_get_priv(dev);
+ struct rk3288_grf *grf = priv->grf;
+ struct display_plat *disp_uc_plat = dev_get_uclass_platdata(dev);
+
+ /* Select the video source */
+ switch (disp_uc_plat->source_id) {
+ case VOP_B:
+ rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK,
+ RK3288_DSI0_LCDC_SEL_BIG
+ << RK3288_DSI0_LCDC_SEL_SHIFT);
+ break;
+ case VOP_L:
+ rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK,
+ RK3288_DSI0_LCDC_SEL_LIT
+ << RK3288_DSI0_LCDC_SEL_SHIFT);
+ break;
+ default:
+ debug("%s: Invalid VOP id\n", __func__);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Setup mipi dphy working mode */
+static void rk_mipi_dphy_mode_set(struct udevice *dev)
+{
+ struct rk_mipi_priv *priv = dev_get_priv(dev);
+ struct rk3288_grf *grf = priv->grf;
+ int val;
+
+ /* Set Controller as TX mode */
+ val = RK3288_DPHY_TX0_RXMODE_DIS << RK3288_DPHY_TX0_RXMODE_SHIFT;
+ rk_clrsetreg(&grf->soc_con8, RK3288_DPHY_TX0_RXMODE_MASK, val);
+
+ /* Exit tx stop mode */
+ val |= RK3288_DPHY_TX0_TXSTOPMODE_EN
+ << RK3288_DPHY_TX0_TXSTOPMODE_SHIFT;
+ rk_clrsetreg(&grf->soc_con8,
+ RK3288_DPHY_TX0_TXSTOPMODE_MASK, val);
+
+ /* Disable turnequest */
+ val |= RK3288_DPHY_TX0_TURNREQUEST_EN
+ << RK3288_DPHY_TX0_TURNREQUEST_SHIFT;
+ rk_clrsetreg(&grf->soc_con8,
+ RK3288_DPHY_TX0_TURNREQUEST_MASK, val);
+}
+
+/*
+ * This function is called by rk_display_init() using rk_mipi_dsi_enable() and
+ * rk_mipi_phy_enable() to initialize mipi controller and dphy. If success,
+ * enable backlight.
+ */
+static int rk_mipi_enable(struct udevice *dev, int panel_bpp,
+ const struct display_timing *timing)
+{
+ int ret;
+ struct rk_mipi_priv *priv = dev_get_priv(dev);
+
+ /* Fill the mipi controller parameter */
+ priv->ref_clk = 24 * MHz;
+ priv->sys_clk = priv->ref_clk;
+ priv->pix_clk = timing->pixelclock.typ;
+ priv->phy_clk = priv->pix_clk * 6;
+ priv->txbyte_clk = priv->phy_clk / 8;
+ priv->txesc_clk = 20 * MHz;
+
+ /* Select vop port, big or little */
+ rk_mipi_dsi_source_select(dev);
+
+ /* Set mipi dphy work mode */
+ rk_mipi_dphy_mode_set(dev);
+
+ /* Config and enable mipi dsi according to timing */
+ ret = rk_mipi_dsi_enable(dev, timing);
+ if (ret) {
+ debug("%s: rk_mipi_dsi_enable() failed (err=%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* Config and enable mipi phy */
+ ret = rk_mipi_phy_enable(dev);
+ if (ret) {
+ debug("%s: rk_mipi_phy_enable() failed (err=%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* Enable backlight */
+ ret = panel_enable_backlight(priv->panel);
+ if (ret) {
+ debug("%s: panel_enable_backlight() failed (err=%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rk_mipi_ofdata_to_platdata(struct udevice *dev)
+{
+ struct rk_mipi_priv *priv = dev_get_priv(dev);
+
+ priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+ if (IS_ERR(priv->grf)) {
+ debug("%s: Get syscon grf failed (ret=%p)\n",
+ __func__, priv->grf);
+ return -ENXIO;
+ }
+ priv->regs = dev_read_addr(dev);
+ if (priv->regs == FDT_ADDR_T_NONE) {
+ debug("%s: Get MIPI dsi address failed (ret=%lu)\n", __func__,
+ priv->regs);
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+/*
+ * Probe function: check panel existence and readingit's timing. Then config
+ * mipi dsi controller and enable it according to the timing parameter.
+ */
+static int rk_mipi_probe(struct udevice *dev)
+{
+ int ret;
+ struct rk_mipi_priv *priv = dev_get_priv(dev);
+
+ ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
+ &priv->panel);
+ if (ret) {
+ debug("%s: Can not find panel (err=%d)\n", __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct dm_display_ops rk_mipi_dsi_ops = {
+ .read_timing = rk_mipi_read_timing,
+ .enable = rk_mipi_enable,
+};
+
+static const struct udevice_id rk_mipi_dsi_ids[] = {
+ { .compatible = "rockchip,rk3288_mipi_dsi" },
+ { }
+};
+
+U_BOOT_DRIVER(rk_mipi_dsi) = {
+ .name = "rk_mipi_dsi",
+ .id = UCLASS_DISPLAY,
+ .of_match = rk_mipi_dsi_ids,
+ .ofdata_to_platdata = rk_mipi_ofdata_to_platdata,
+ .probe = rk_mipi_probe,
+ .ops = &rk_mipi_dsi_ops,
+ .priv_auto_alloc_size = sizeof(struct rk_mipi_priv),
+};
diff --git a/drivers/video/rockchip/rk_mipi.h b/drivers/video/rockchip/rk_mipi.h
index 906aaaa..de6ac52 100644
--- a/drivers/video/rockchip/rk_mipi.h
+++ b/drivers/video/rockchip/rk_mipi.h
@@ -8,7 +8,7 @@
#define __RK_MIPI_H
struct rk_mipi_priv {
- void __iomem *regs;
+ uintptr_t regs;
void *grf;
struct udevice *panel;
struct mipi_dsi *dsi;
--
1.9.1
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