[RFC PATCH 3/4] video: display: Add exynos-dsi video source driver
Tomasz Figa
t.figa at samsung.com
Wed Jan 30 07:39:02 PST 2013
This patch adds new driver for DSI master block available in Samsung
Exynos SoCs. The driver is designed and written specifically for Common
Display Framework.
Signed-off-by: Tomasz Figa <t.figa at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
---
drivers/video/display/Kconfig | 3 +
drivers/video/display/Makefile | 1 +
drivers/video/display/source-exynos_dsi.c | 1313 +++++++++++++++++++++++++++++
include/video/exynos_dsi.h | 41 +
4 files changed, 1358 insertions(+)
create mode 100644 drivers/video/display/source-exynos_dsi.c
create mode 100644 include/video/exynos_dsi.h
diff --git a/drivers/video/display/Kconfig b/drivers/video/display/Kconfig
index 477192d..b14527a 100644
--- a/drivers/video/display/Kconfig
+++ b/drivers/video/display/Kconfig
@@ -6,5 +6,8 @@ menuconfig DISPLAY_CORE
if DISPLAY_CORE
+config DISPLAY_SOURCE_EXYNOS_DSI
+ tristate "Samsung SoC MIPI DSI Master"
+
endif # DISPLAY_CORE
diff --git a/drivers/video/display/Makefile b/drivers/video/display/Makefile
index bd93496..40a283a 100644
--- a/drivers/video/display/Makefile
+++ b/drivers/video/display/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_DISPLAY_CORE) += display-core.o
+obj-$(CONFIG_DISPLAY_SOURCE_EXYNOS_DSI) += source-exynos_dsi.o
diff --git a/drivers/video/display/source-exynos_dsi.c b/drivers/video/display/source-exynos_dsi.c
new file mode 100644
index 0000000..30b15bf
--- /dev/null
+++ b/drivers/video/display/source-exynos_dsi.c
@@ -0,0 +1,1313 @@
+/*
+ * Samsung SoC MIPI DSI Master driver.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd
+ *
+ * Contacts: Tomasz Figa <t.figa at samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/memory.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spinlock.h>
+#include <linux/videomode.h>
+#include <linux/wait.h>
+
+#include <video/display.h>
+#include <video/exynos_dsi.h>
+#include <video/mipi_display.h>
+
+#define DSIM_STATUS_REG 0x0 /* Status register */
+#define DSIM_SWRST_REG 0x4 /* Software reset register */
+#define DSIM_CLKCTRL_REG 0x8 /* Clock control register */
+#define DSIM_TIMEOUT_REG 0xc /* Time out register */
+#define DSIM_CONFIG_REG 0x10 /* Configuration register */
+#define DSIM_ESCMODE_REG 0x14 /* Escape mode register */
+
+/* Main display image resolution register */
+#define DSIM_MDRESOL_REG 0x18
+#define DSIM_MVPORCH_REG 0x1c /* Main display Vporch register */
+#define DSIM_MHPORCH_REG 0x20 /* Main display Hporch register */
+#define DSIM_MSYNC_REG 0x24 /* Main display sync area register */
+
+/* Sub display image resolution register */
+#define DSIM_SDRESOL_REG 0x28
+#define DSIM_INTSRC_REG 0x2c /* Interrupt source register */
+#define DSIM_INTMSK_REG 0x30 /* Interrupt mask register */
+#define DSIM_PKTHDR_REG 0x34 /* Packet Header FIFO register */
+#define DSIM_PAYLOAD_REG 0x38 /* Payload FIFO register */
+#define DSIM_RXFIFO_REG 0x3c /* Read FIFO register */
+#define DSIM_FIFOTHLD_REG 0x40 /* FIFO threshold level register */
+#define DSIM_FIFOCTRL_REG 0x44 /* FIFO status and control register */
+
+/* FIFO memory AC characteristic register */
+#define DSIM_PLLCTRL_REG 0x4c /* PLL control register */
+#define DSIM_PLLTMR_REG 0x50 /* PLL timer register */
+#define DSIM_PHYACCHR_REG 0x54 /* D-PHY AC characteristic register */
+#define DSIM_PHYACCHR1_REG 0x58 /* D-PHY AC characteristic register1 */
+
+/* DSIM_STATUS */
+#define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0)
+#define DSIM_STOP_STATE_CLK (1 << 8)
+#define DSIM_TX_READY_HS_CLK (1 << 10)
+#define DSIM_PLL_STABLE (1 << 31)
+
+/* DSIM_SWRST */
+#define DSIM_FUNCRST (1 << 16)
+#define DSIM_SWRST (1 << 0)
+
+/* DSIM_TIMEOUT */
+#define DSIM_LPDR_TOUT(x) ((x) << 0)
+#define DSIM_BTA_TOUT(x) ((x) << 16)
+
+/* DSIM_CLKCTRL */
+#define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
+#define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
+#define DSIM_LANE_ESC_CLK_EN_CLK (1 << 19)
+#define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20)
+#define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20)
+#define DSIM_BYTE_CLKEN (1 << 24)
+#define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
+#define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
+#define DSIM_PLL_BYPASS (1 << 27)
+#define DSIM_ESC_CLKEN (1 << 28)
+#define DSIM_TX_REQUEST_HSCLK (1 << 31)
+
+/* DSIM_CONFIG */
+#define DSIM_LANE_EN_CLK (1 << 0)
+#define DSIM_LANE_EN(x) (((x) & 0xf) << 1)
+#define DSIM_NUM_OF_DATA_LANE(x) (((x) & 0x3) << 5)
+#define DSIM_SUB_PIX_FORMAT(x) (((x) & 0x7) << 8)
+#define DSIM_MAIN_PIX_FORMAT_MASK (0x7 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB888 (0x7 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB666 (0x6 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB666_P (0x5 << 12)
+#define DSIM_MAIN_PIX_FORMAT_RGB565 (0x4 << 12)
+#define DSIM_SUB_VC (((x) & 0x3) << 16)
+#define DSIM_MAIN_VC (((x) & 0x3) << 18)
+#define DSIM_HSA_MODE (1 << 20)
+#define DSIM_HBP_MODE (1 << 21)
+#define DSIM_HFP_MODE (1 << 22)
+#define DSIM_HSE_MODE (1 << 23)
+#define DSIM_AUTO_MODE (1 << 24)
+#define DSIM_VIDEO_MODE (1 << 25)
+#define DSIM_BURST_MODE (1 << 26)
+#define DSIM_SYNC_INFORM (1 << 27)
+#define DSIM_EOT_DISABLE (1 << 28)
+#define DSIM_MFLUSH_VS (1 << 29)
+
+/* DSIM_ESCMODE */
+#define DSIM_TX_LPDT_LP (1 << 6)
+#define DSIM_CMD_LPDT_LP (1 << 7)
+#define DSIM_FORCE_STOP_STATE (1 << 20)
+#define DSIM_STOP_STATE_CNT(x) (((x) & 0x7ff) << 21)
+#define DSIM_STOP_STATE_CNT_MASK (0x7ff << 21)
+
+/* DSIM_MDRESOL */
+#define DSIM_MAIN_STAND_BY (1 << 31)
+#define DSIM_MAIN_VRESOL(x) (((x) & 0x7ff) << 16)
+#define DSIM_MAIN_HRESOL(x) (((x) & 0X7ff) << 0)
+
+/* DSIM_MVPORCH */
+#define DSIM_CMD_ALLOW(x) ((x) << 28)
+#define DSIM_STABLE_VFP(x) ((x) << 16)
+#define DSIM_MAIN_VBP(x) ((x) << 0)
+#define DSIM_CMD_ALLOW_MASK (0xf << 28)
+#define DSIM_STABLE_VFP_MASK (0x7ff << 16)
+#define DSIM_MAIN_VBP_MASK (0x7ff << 0)
+
+/* DSIM_MHPORCH */
+#define DSIM_MAIN_HFP(x) ((x) << 16)
+#define DSIM_MAIN_HBP(x) ((x) << 0)
+#define DSIM_MAIN_HFP_MASK ((0xffff) << 16)
+#define DSIM_MAIN_HBP_MASK ((0xffff) << 0)
+
+/* DSIM_MSYNC */
+#define DSIM_MAIN_VSA(x) ((x) << 22)
+#define DSIM_MAIN_HSA(x) ((x) << 0)
+#define DSIM_MAIN_VSA_MASK ((0x3ff) << 22)
+#define DSIM_MAIN_HSA_MASK ((0xffff) << 0)
+
+/* DSIM_SDRESOL */
+#define DSIM_SUB_STANDY(x) ((x) << 31)
+#define DSIM_SUB_VRESOL(x) ((x) << 16)
+#define DSIM_SUB_HRESOL(x) ((x) << 0)
+#define DSIM_SUB_STANDY_MASK ((0x1) << 31)
+#define DSIM_SUB_VRESOL_MASK ((0x7ff) << 16)
+#define DSIM_SUB_HRESOL_MASK ((0x7ff) << 0)
+
+/* DSIM_INTSRC */
+#define DSIM_INT_PLL_STABLE (1 << 31)
+#define DSIM_INT_SW_RST_RELEASE (1 << 30)
+#define DSIM_INT_SFR_FIFO_EMPTY (1 << 29)
+#define DSIM_INT_BTA (1 << 25)
+#define DSIM_INT_FRAME_DONE (1 << 24)
+#define DSIM_INT_RX_TIMEOUT (1 << 21)
+#define DSIM_INT_BTA_TIMEOUT (1 << 20)
+#define DSIM_INT_RX_DONE (1 << 18)
+#define DSIM_INT_RX_TE (1 << 17)
+#define DSIM_INT_RX_ACK (1 << 16)
+#define DSIM_INT_RX_ECC_ERR (1 << 15)
+#define DSIM_INT_RX_CRC_ERR (1 << 14)
+
+/* DSIM_FIFOCTRL */
+#define SFR_HEADER_EMPTY (1 << 22)
+
+/* DSIM_PHYACCHR */
+#define DSIM_AFC_EN (1 << 14)
+#define DSIM_AFC_CTL(x) (((x) & 0x7) << 5)
+
+/* DSIM_PLLCTRL */
+#define DSIM_FREQ_BAND(x) ((x) << 24)
+#define DSIM_PLL_EN (1 << 23)
+#define DSIM_PLL_P(x) ((x) << 13)
+#define DSIM_PLL_M(x) ((x) << 4)
+#define DSIM_PLL_S(x) ((x) << 1)
+
+#define DSI_MAX_BUS_WIDTH 4
+#define DSI_NUM_VIRTUAL_CHANNELS 4
+#define DSI_TX_FIFO_SIZE 2048
+#define DSI_XFER_TIMEOUT_MS 100
+
+enum exynos_dsi_transfer_type {
+ EXYNOS_DSI_TX,
+ EXYNOS_DSI_RX,
+};
+
+struct exynos_dsi_transfer {
+ struct list_head list;
+ struct completion completed;
+ int result;
+ u8 type;
+ u8 data[2];
+
+ const u8 *tx_payload;
+ u16 tx_len;
+ u16 tx_done;
+
+ u8 *rx_payload;
+ u16 rx_len;
+ u16 rx_done;
+};
+
+struct exynos_dsi {
+ struct video_source out;
+ struct mipi_dsi_interface_params params;
+ bool streaming;
+
+ struct device *dev;
+ struct resource *res;
+ struct clk *pll_clk;
+ struct clk *bus_clk;
+ unsigned int irq;
+ void __iomem *reg_base;
+ struct regulator_bulk_data supplies[2];
+ struct exynos_dsi_platform_data *pd;
+
+ spinlock_t transfer_lock;
+ struct list_head transfer_list;
+ bool hs_mode;
+};
+
+#define src_to_dsi(src) container_of(src, struct exynos_dsi, out)
+
+/*
+ * H/W control
+ */
+
+static void exynos_dsi_reset(struct exynos_dsi *dsi)
+{
+ writel(DSIM_SWRST, dsi->reg_base + DSIM_SWRST_REG);
+
+ udelay(10);
+}
+
+#ifndef MHZ
+#define MHZ (1000*1000)
+#endif
+
+static const unsigned long freq_bands[] = {
+ 100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
+ 270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
+ 510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
+ 770 * MHZ, 870 * MHZ, 950 * MHZ,
+};
+
+static const int afc_settings[] = {
+ 1, 0, 3, 2, 5, 4,
+};
+
+static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi *dsi,
+ unsigned long fin, unsigned long fout, u8 *p, u16 *m, u8 *s)
+{
+ unsigned long best_freq = 0;
+ u32 min_delta = 0xffffffff;
+ u8 p_min, p_max;
+ u8 _p, best_p;
+ u16 _m, best_m;
+ u8 _s, best_s;
+
+ p_min = DIV_ROUND_UP(fin, (12 * MHZ));
+ p_max = fin / (6 * MHZ);
+
+ for (_p = p_min; _p <= p_max; ++_p) {
+ for (_s = 0; _s <= 5; ++_s) {
+ u64 tmp;
+ u32 delta;
+ u16 div;
+
+ tmp = (u64)fout * (_p << _s);
+ do_div(tmp, fin);
+ _m = tmp;
+ if (_m < 41 || _m > 125)
+ continue;
+
+ tmp = (u64)_m * fin;
+ do_div(tmp, _p);
+ if (tmp < 500 * MHZ || tmp > 1000 * MHZ)
+ continue;
+
+ tmp = (u64)_m * fin;
+ div = (_p << _s);
+ do_div(tmp, div);
+
+ delta = abs(fout - tmp);
+ if (delta < min_delta) {
+ best_p = _p;
+ best_m = _m;
+ best_s = _s;
+ min_delta = delta;
+ best_freq = tmp;
+ }
+ }
+ }
+
+ if (best_freq) {
+ *p = best_p;
+ *m = best_m;
+ *s = best_s;
+ }
+
+ return best_freq;
+}
+
+static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi,
+ unsigned long freq)
+{
+ unsigned long fin, fout, fin_pll;
+ int timeout;
+ u8 p;
+ u16 m;
+ u8 s;
+ int band;
+ int afc;
+ u32 reg;
+
+ clk_set_rate(dsi->pll_clk, dsi->pd->pll_clk_rate);
+
+ fin = clk_get_rate(dsi->pll_clk);
+ if (!fin) {
+ dev_err(dsi->dev, "failed to get PLL clock frequency\n");
+ return 0;
+ }
+
+ dev_dbg(dsi->dev, "PLL input frequency: %lu\n", fin);
+
+ fout = exynos_dsi_pll_find_pms(dsi, fin, freq, &p, &m, &s);
+ if (!fout) {
+ dev_err(dsi->dev,
+ "failed to find PLL coefficients for requested frequency\n");
+ return -EFAULT;
+ }
+
+ dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s);
+
+ for (band = 0; band < ARRAY_SIZE(freq_bands); ++band)
+ if (fout < freq_bands[band])
+ break;
+
+ fin_pll = DIV_ROUND_CLOSEST(fin, p);
+ fin_pll /= MHZ;
+ if (fin_pll > 6)
+ fin_pll -= 6;
+ else
+ fin_pll = 0;
+ if (fin_pll >= ARRAY_SIZE(afc_settings))
+ fin_pll = ARRAY_SIZE(afc_settings) - 1;
+
+ afc = afc_settings[fin_pll];
+
+ dev_dbg(dsi->dev, "freq band %d, afc_setting %d\n", band, afc);
+
+ writel(dsi->pd->pll_stable_time, dsi->reg_base + DSIM_PLLTMR_REG);
+
+ reg = DSIM_AFC_CTL(afc) | DSIM_AFC_EN;
+ writel(reg, dsi->reg_base + DSIM_PHYACCHR_REG);
+
+ reg = DSIM_FREQ_BAND(band) | DSIM_PLL_EN
+ | DSIM_PLL_P(p) | DSIM_PLL_M(m) | DSIM_PLL_S(s);
+ writel(reg, dsi->reg_base + DSIM_PLLCTRL_REG);
+
+ timeout = 1000;
+ do {
+ if (timeout-- == 0) {
+ dev_err(dsi->dev, "PLL failed to stabilize\n");
+ return -EFAULT;
+ }
+ reg = readl(dsi->reg_base + DSIM_STATUS_REG);
+ } while ((reg & DSIM_PLL_STABLE) == 0);
+
+ return fout;
+}
+
+static int exynos_dsi_enable_clock(struct exynos_dsi *dsi)
+{
+ unsigned long hs_clk, byte_clk, esc_clk;
+ unsigned long esc_div;
+ u32 reg;
+
+ hs_clk = exynos_dsi_set_pll(dsi, dsi->params.hs_clk_freq);
+ if (!hs_clk) {
+ dev_err(dsi->dev, "failed to configure DSI PLL\n");
+ return -EFAULT;
+ }
+
+ byte_clk = hs_clk / 8;
+ esc_div = DIV_ROUND_UP(byte_clk, dsi->params.esc_clk_freq);
+ esc_clk = byte_clk / esc_div;
+
+ if (esc_clk > 20 * MHZ) {
+ ++esc_div;
+ esc_clk = byte_clk / esc_div;
+ }
+
+ dev_dbg(dsi->dev, "hs_clk = %lu, byte_clk = %lu, esc_clk = %lu\n",
+ hs_clk, byte_clk, esc_clk);
+
+ reg = readl(dsi->reg_base + DSIM_CLKCTRL_REG);
+ reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK
+ | DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS
+ | DSIM_BYTE_CLK_SRC_MASK);
+ reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN
+ | DSIM_ESC_PRESCALER(esc_div)
+ | DSIM_LANE_ESC_CLK_EN_CLK
+ | DSIM_LANE_ESC_CLK_EN_DATA(dsi->params.data_lanes)
+ | DSIM_BYTE_CLK_SRC(0)
+ | DSIM_TX_REQUEST_HSCLK;
+ writel(reg, dsi->reg_base + DSIM_CLKCTRL_REG);
+
+ return 0;
+}
+
+static void exynos_dsi_disable_clock(struct exynos_dsi *dsi)
+{
+ u32 reg;
+
+ reg = readl(dsi->reg_base + DSIM_CLKCTRL_REG);
+ reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK |
+ DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN);
+ writel(reg, dsi->reg_base + DSIM_CLKCTRL_REG);
+
+ reg = readl(dsi->reg_base + DSIM_PLLCTRL_REG);
+ reg &= ~DSIM_PLL_EN;
+ writel(reg, dsi->reg_base + DSIM_PLLCTRL_REG);
+}
+
+static int exynos_dsi_init_link(struct exynos_dsi *dsi)
+{
+ u32 reg;
+ int timeout;
+
+ /* Initialize FIFO pointers */
+ reg = readl(dsi->reg_base + DSIM_FIFOCTRL_REG);
+ reg &= ~0x1f;
+ writel(reg, dsi->reg_base + DSIM_FIFOCTRL_REG);
+
+ msleep(10);
+
+ reg |= 0x1f;
+ writel(reg, dsi->reg_base + DSIM_FIFOCTRL_REG);
+
+ msleep(10);
+
+ /* DSI configuration */
+ reg = 0;
+
+ if (dsi->params.mode & DSI_MODE_VIDEO) {
+ reg |= DSIM_VIDEO_MODE;
+
+ if (!(dsi->params.mode & DSI_MODE_VSYNC_FLUSH))
+ reg |= DSIM_MFLUSH_VS;
+ if (!(dsi->params.mode & DSI_MODE_EOT_PACKET))
+ reg |= DSIM_EOT_DISABLE;
+ if (dsi->params.mode & DSI_MODE_VIDEO_SYNC_PULSE)
+ reg |= DSIM_SYNC_INFORM;
+ if (dsi->params.mode & DSI_MODE_VIDEO_BURST)
+ reg |= DSIM_BURST_MODE;
+ if (dsi->params.mode & DSI_MODE_VIDEO_AUTO_VERT)
+ reg |= DSIM_AUTO_MODE;
+ if (dsi->params.mode & DSI_MODE_VIDEO_HSE)
+ reg |= DSIM_HSE_MODE;
+ if (!(dsi->params.mode & DSI_MODE_VIDEO_HFP))
+ reg |= DSIM_HFP_MODE;
+ if (!(dsi->params.mode & DSI_MODE_VIDEO_HBP))
+ reg |= DSIM_HBP_MODE;
+ if (!(dsi->params.mode & DSI_MODE_VIDEO_HSA))
+ reg |= DSIM_HSA_MODE;
+ }
+
+ switch (dsi->params.format) {
+ case DSI_FMT_RGB888:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB888;
+ break;
+ case DSI_FMT_RGB666:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB666;
+ break;
+ case DSI_FMT_RGB666_PACKED:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB666_P;
+ break;
+ case DSI_FMT_RGB565:
+ reg |= DSIM_MAIN_PIX_FORMAT_RGB565;
+ break;
+ default:
+ dev_err(dsi->dev, "invalid pixel format\n");
+ return -EINVAL;
+ }
+
+ switch (dsi->params.data_lanes) {
+ case 0x1:
+ reg |= DSIM_NUM_OF_DATA_LANE(0);
+ break;
+ case 0x3:
+ reg |= DSIM_NUM_OF_DATA_LANE(1);
+ break;
+ case 0x7:
+ reg |= DSIM_NUM_OF_DATA_LANE(2);
+ break;
+ case 0xf:
+ reg |= DSIM_NUM_OF_DATA_LANE(3);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ writel(reg, dsi->reg_base + DSIM_CONFIG_REG);
+
+ reg |= DSIM_LANE_EN_CLK;
+ writel(reg, dsi->reg_base + DSIM_CONFIG_REG);
+
+ reg |= DSIM_LANE_EN(dsi->params.data_lanes);
+ writel(reg, dsi->reg_base + DSIM_CONFIG_REG);
+
+ /* Clock configuration */
+ exynos_dsi_enable_clock(dsi);
+
+ /* Check clock and data lane state are stop state */
+ timeout = 100;
+ do {
+ if (timeout-- == 0) {
+ dev_err(dsi->dev, "waiting for bus lanes timed out\n");
+ return -EFAULT;
+ }
+
+ reg = readl(dsi->reg_base + DSIM_STATUS_REG);
+ if ((reg & DSIM_STOP_STATE_DAT(dsi->params.data_lanes))
+ != DSIM_STOP_STATE_DAT(dsi->params.data_lanes))
+ continue;
+ } while (!(reg & (DSIM_STOP_STATE_CLK | DSIM_TX_READY_HS_CLK)));
+
+ reg = readl(dsi->reg_base + DSIM_ESCMODE_REG);
+ reg &= ~DSIM_STOP_STATE_CNT_MASK;
+ reg |= DSIM_STOP_STATE_CNT(dsi->pd->stop_holding_cnt);
+ writel(reg, dsi->reg_base + DSIM_ESCMODE_REG);
+
+ reg = DSIM_BTA_TOUT(dsi->pd->bta_timeout)
+ | DSIM_LPDR_TOUT(dsi->pd->rx_timeout);
+ writel(reg, dsi->reg_base + DSIM_TIMEOUT_REG);
+
+ return 0;
+}
+
+static int exynos_dsi_set_display_mode(struct exynos_dsi *dsi)
+{
+ const struct videomode *mode;
+ u32 reg;
+ int ret;
+
+ ret = display_entity_get_modes(dsi->out.sink, &mode);
+ if (ret < 0) {
+ dev_err(dsi->dev, "failed to get display video mode\n");
+ return ret;
+ }
+
+ if (dsi->params.mode & DSI_MODE_VIDEO) {
+ reg = DSIM_CMD_ALLOW(dsi->params.cmd_allow)
+ | DSIM_STABLE_VFP(mode->vfront_porch)
+ | DSIM_MAIN_VBP(mode->vback_porch);
+ writel(reg, dsi->reg_base + DSIM_MVPORCH_REG);
+
+ reg = DSIM_MAIN_HFP(mode->hfront_porch)
+ | DSIM_MAIN_HBP(mode->hback_porch);
+ writel(reg, dsi->reg_base + DSIM_MHPORCH_REG);
+
+ reg = DSIM_MAIN_VSA(mode->vsync_len)
+ | DSIM_MAIN_HSA(mode->hsync_len);
+ writel(reg, dsi->reg_base + DSIM_MSYNC_REG);
+ }
+
+ reg = DSIM_MAIN_HRESOL(mode->hactive) | DSIM_MAIN_VRESOL(mode->vactive);
+ writel(reg, dsi->reg_base + DSIM_MDRESOL_REG);
+
+ dev_dbg(dsi->dev, "LCD width = %d, height = %d\n",
+ mode->hactive, mode->vactive);
+
+ return 0;
+}
+
+static void exynos_dsi_set_display_enable(struct exynos_dsi *dsi, bool enable)
+{
+ u32 reg;
+
+ reg = readl(dsi->reg_base + DSIM_MDRESOL_REG);
+ if (enable)
+ reg |= DSIM_MAIN_STAND_BY;
+ else
+ reg &= ~DSIM_MAIN_STAND_BY;
+ writel(reg, dsi->reg_base +DSIM_MDRESOL_REG);
+}
+
+/*
+ * FIFO
+ */
+
+static void exynos_dsi_send_to_fifo(struct exynos_dsi *dsi,
+ struct exynos_dsi_transfer *xfer)
+{
+ const u8 *payload = xfer->tx_payload + xfer->tx_done;
+ u16 length = xfer->tx_len - xfer->tx_done;
+ bool first = !xfer->tx_done;
+ u32 reg;
+
+ dev_dbg(dsi->dev,
+ "< xfer %p, tx_len %u, tx_done %u, rx_len %u, rx_done %u\n",
+ xfer, xfer->tx_len, xfer->tx_done, xfer->rx_len, xfer->rx_done);
+
+ if (length > DSI_TX_FIFO_SIZE)
+ length = DSI_TX_FIFO_SIZE;
+
+ xfer->tx_done += length;
+
+ /* Send payload */
+ while (length >= 4) {
+ reg = (payload[3] << 24) | (payload[2] << 16)
+ | (payload[1] << 8) | payload[0];
+ writel(reg, dsi->reg_base + DSIM_PAYLOAD_REG);
+ payload += 4;
+ length -= 4;
+ }
+
+ reg = 0;
+ switch (length) {
+ case 3:
+ reg |= payload[2] << 16;
+ /* Fall through */
+ case 2:
+ reg |= payload[1] << 8;
+ /* Fall through */
+ case 1:
+ reg |= payload[0];
+ writel(reg, dsi->reg_base + DSIM_PAYLOAD_REG);
+ break;
+ case 0:
+ /* Do nothing */
+ break;
+ }
+
+ /* Send packet header */
+ if (first) {
+ if (xfer->rx_len) {
+ reg = (xfer->rx_len << 8)
+ | MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE;
+ writel(reg, dsi->reg_base + DSIM_PKTHDR_REG);
+ }
+ reg = (xfer->data[1] << 16) | (xfer->data[0] << 8) | xfer->type;
+ writel(reg, dsi->reg_base + DSIM_PKTHDR_REG);
+ }
+}
+
+static void exynos_readl_from_fifo(struct exynos_dsi *dsi,
+ struct exynos_dsi_transfer *xfer)
+{
+ u8 *payload = xfer->rx_payload + xfer->rx_done;
+ bool first = !xfer->rx_done;
+ u16 length;
+ u32 reg;
+
+ if (first) {
+ reg = readl(dsi->reg_base + DSIM_RXFIFO_REG);
+ length = (reg >> 8) & 0xffff;
+ if (length > xfer->rx_len)
+ dev_dbg(dsi->dev,
+ "response too long (expected %u, got %u bytes)\n",
+ xfer->rx_len, length);
+ if (length < xfer->rx_len)
+ xfer->rx_len = length;
+ }
+
+ length = xfer->rx_len - xfer->rx_done;
+ xfer->rx_done += length;
+
+ /* Receive payload */
+ while (length >= 4) {
+ reg = readl(dsi->reg_base + DSIM_RXFIFO_REG);
+ payload[0] = (reg >> 0) & 0xff;
+ payload[1] = (reg >> 8) & 0xff;
+ payload[2] = (reg >> 16) & 0xff;
+ payload[3] = (reg >> 24) & 0xff;
+ payload += 4;
+ length -= 4;
+ }
+
+ if (length) {
+ reg = readl(dsi->reg_base + DSIM_RXFIFO_REG);
+ switch (length) {
+ case 3:
+ payload[2] = (reg >> 16) & 0xff;
+ /* Fall through */
+ case 2:
+ payload[1] = (reg >> 8) & 0xff;
+ /* Fall through */
+ case 1:
+ payload[0] = reg & 0xff;
+ }
+ }
+
+ do {
+ reg = readl(dsi->reg_base + DSIM_RXFIFO_REG);
+ } while (reg != 0x30800002);
+}
+
+/*
+ * Transfer
+ */
+
+static void exynos_dsi_transfer_cancel(struct exynos_dsi *dsi,
+ struct exynos_dsi_transfer *xfer)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ if (!list_empty(&xfer->list))
+ list_del_init(&xfer->list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+}
+
+static void exynos_dsi_transfer_start(struct exynos_dsi *dsi)
+{
+ unsigned long flags;
+ struct exynos_dsi_transfer *xfer;
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ if (list_empty(&dsi->transfer_list)) {
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+ return;
+ }
+
+ xfer = list_first_entry(&dsi->transfer_list,
+ struct exynos_dsi_transfer, list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ if (xfer->tx_len && xfer->tx_done == xfer->tx_len)
+ /* waiting for RX */
+ return;
+
+ exynos_dsi_send_to_fifo(dsi, xfer);
+}
+
+static void exynos_dsi_transfer_finish(struct exynos_dsi *dsi,
+ enum exynos_dsi_transfer_type type)
+{
+ struct exynos_dsi_transfer *xfer;
+ unsigned long flags;
+ bool start = true;
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ if (list_empty(&dsi->transfer_list)) {
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+ dev_warn(dsi->dev, "unexpected TX/RX interrupt\n");
+ return;
+ }
+
+ xfer = list_first_entry(&dsi->transfer_list,
+ struct exynos_dsi_transfer, list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ dev_dbg(dsi->dev,
+ "> xfer %p, tx_len %u, tx_done %u, rx_len %u, rx_done %u\n",
+ xfer, xfer->tx_len, xfer->tx_done, xfer->rx_len, xfer->rx_done);
+
+ if (type == EXYNOS_DSI_RX)
+ exynos_readl_from_fifo(dsi, xfer);
+
+ if (xfer->tx_done == xfer->tx_len && xfer->rx_done == xfer->rx_len) {
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+ list_del_init(&xfer->list);
+ start = !list_empty(&dsi->transfer_list);
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+ xfer->result = 0;
+ complete(&xfer->completed);
+ }
+
+ if (type == EXYNOS_DSI_TX && xfer->tx_done != xfer->tx_len)
+ exynos_dsi_send_to_fifo(dsi, xfer);
+
+ if (start)
+ exynos_dsi_transfer_start(dsi);
+}
+
+static int exynos_dsi_transfer(struct exynos_dsi *dsi,
+ struct exynos_dsi_transfer *xfers, unsigned int num_xfers)
+{
+ unsigned long flags;
+ bool stopped;
+ LIST_HEAD(xfer_list);
+
+ for (; num_xfers; --num_xfers, ++xfers) {
+ xfers->tx_done = 0;
+ xfers->rx_done = 0;
+ xfers->result = -ETIMEDOUT;
+ init_completion(&xfers->completed);
+
+ list_add_tail(&xfers->list, &xfer_list);
+ }
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ stopped = list_empty(&dsi->transfer_list);
+ list_splice_tail(&xfer_list, &dsi->transfer_list);
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+
+ if (stopped)
+ exynos_dsi_transfer_start(dsi);
+
+ return 0;
+}
+
+/*
+ * Interrupt handler
+ */
+
+static irqreturn_t exynos_dsi_irq(int irq, void *dev_id)
+{
+ struct exynos_dsi *dsi = dev_id;
+ u32 status;
+
+ status = readl(dsi->reg_base + DSIM_INTSRC_REG);
+ writel(status, dsi->reg_base + DSIM_INTSRC_REG);
+
+ if (status & DSIM_INT_SW_RST_RELEASE) {
+ u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY);
+ writel(mask, dsi->reg_base + DSIM_INTMSK_REG);
+ return IRQ_HANDLED;
+ }
+
+ if (status & DSIM_INT_RX_DONE) {
+ exynos_dsi_transfer_finish(dsi, EXYNOS_DSI_RX);
+ return IRQ_HANDLED;
+ }
+
+ if (status & DSIM_INT_SFR_FIFO_EMPTY) {
+ exynos_dsi_transfer_finish(dsi, EXYNOS_DSI_TX);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+/*
+ * Display source
+ */
+
+static int exynos_dsi_set_stream(struct video_source *src,
+ enum video_source_stream_state state)
+{
+ struct exynos_dsi *dsi = src_to_dsi(src);
+
+ if (pm_runtime_suspended(dsi->dev))
+ return -EINVAL;
+
+ switch (state) {
+ case DISPLAY_ENTITY_STREAM_STOPPED:
+ exynos_dsi_set_display_enable(dsi, false);
+ dsi->streaming = false;
+ break;
+
+ case DISPLAY_ENTITY_STREAM_CONTINUOUS:
+ exynos_dsi_set_display_mode(dsi);
+ exynos_dsi_set_display_enable(dsi, true);
+ dsi->streaming = true;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* enable/disable dsi bus */
+static int exynos_dsi_enable(struct video_source *src)
+{
+ struct display_entity_interface_params params;
+ struct exynos_dsi *dsi = src_to_dsi(src);
+ int ret;
+
+ ret = display_entity_get_params(src->sink, ¶ms);
+ if (ret < 0)
+ return ret;
+ dsi->params = params.p.dsi;
+
+ ret = pm_runtime_get_sync(dsi->dev);
+ if (ret < 0)
+ return ret;
+
+ exynos_dsi_reset(dsi);
+ exynos_dsi_init_link(dsi);
+
+ return 0;
+}
+
+static int exynos_dsi_disable(struct video_source *src)
+{
+ struct exynos_dsi *dsi = src_to_dsi(src);
+
+ if (dsi->streaming)
+ return -EBUSY;
+
+ exynos_dsi_disable_clock(dsi);
+
+ return pm_runtime_put_sync(dsi->dev);
+}
+
+static void exynos_dsi_enable_hs(struct video_source *src, bool enable)
+{
+ struct exynos_dsi *dsi = src_to_dsi(src);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+ dsi->hs_mode = enable;
+
+ spin_unlock_irqrestore(&dsi->transfer_lock, flags);
+}
+
+/* data transfer */
+static int exynos_dsi_dcs_write(struct video_source *src, int channel,
+ const u8 *data, size_t len)
+{
+ struct exynos_dsi *dsi = src_to_dsi(src);
+ struct exynos_dsi_transfer xfer;
+ long ret;
+
+ if (!len)
+ return -EINVAL;
+
+ switch (len) {
+#if 0
+ /* FIXME: Fix handling of short packets */
+ case 1:
+ len = 0;
+ xfer.type = MIPI_DSI_DCS_SHORT_WRITE;
+ xfer.data[0] = data[0];
+ xfer.data[1] = 0;
+ break;
+ case 2:
+ len = 0;
+ xfer.type = MIPI_DSI_DCS_SHORT_WRITE_PARAM;
+ xfer.data[0] = data[0];
+ xfer.data[1] = data[1];
+ break;
+#endif
+ default:
+ xfer.type = MIPI_DSI_DCS_LONG_WRITE;
+ xfer.data[0] = len & 0xff;
+ xfer.data[1] = len >> 8;
+ }
+
+ xfer.tx_payload = data;
+ xfer.tx_len = len;
+ xfer.rx_len = 0;
+
+ ret = exynos_dsi_transfer(dsi, &xfer, 1);
+ if (ret < 0)
+ return ret;
+
+ wait_for_completion_timeout(&xfer.completed,
+ msecs_to_jiffies(DSI_XFER_TIMEOUT_MS));
+ if (xfer.result == -ETIMEDOUT) {
+ exynos_dsi_transfer_cancel(dsi, &xfer);
+ dev_err(dsi->dev, "xfer timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ /* Also covers timeout condition */
+ return xfer.result;
+}
+
+static int exynos_dsi_dcs_read(struct video_source *src,
+ int channel, u8 dcs_cmd, u8 *data, size_t len)
+{
+ struct exynos_dsi *dsi = src_to_dsi(src);
+ struct exynos_dsi_transfer xfer;
+ long ret;
+
+ xfer.type = MIPI_DSI_DCS_READ;
+ xfer.tx_len = 0;
+ xfer.rx_payload = data;
+ xfer.rx_len = len;
+ xfer.data[0] = dcs_cmd;
+ xfer.data[1] = 0x00;
+
+ ret = exynos_dsi_transfer(dsi, &xfer, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = wait_for_completion_timeout(&xfer.completed,
+ msecs_to_jiffies(DSI_XFER_TIMEOUT_MS));
+ if (xfer.result == -ETIMEDOUT) {
+ exynos_dsi_transfer_cancel(dsi, &xfer);
+ dev_err(dsi->dev, "xfer timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ /* Also covers timeout condition */
+ return xfer.result;
+}
+
+static const struct common_video_source_ops exynos_dsi_common_ops = {
+ .set_stream = exynos_dsi_set_stream,
+};
+
+static const struct dsi_video_source_ops exynos_dsi_ops = {
+ .enable = exynos_dsi_enable,
+ .disable = exynos_dsi_disable,
+
+ .enable_hs = exynos_dsi_enable_hs,
+
+ .dcs_write = exynos_dsi_dcs_write,
+ .dcs_read = exynos_dsi_dcs_read,
+};
+
+#ifdef CONFIG_OF
+/*
+ * Device Tree
+ */
+
+static int (* const of_phy_enables[])(struct platform_device *, bool) = {
+#ifdef CONFIG_S5P_SETUP_MIPIPHY
+ [0] = s5p_dsim_phy_enable,
+#endif
+};
+
+static struct exynos_dsi_platform_data *exynos_dsi_parse_dt(
+ struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct exynos_dsi_platform_data *dsi_pd;
+ struct device *dev = &pdev->dev;
+ const __be32 *prop_data;
+ u32 val;
+
+ dsi_pd = kzalloc(sizeof(*dsi_pd), GFP_KERNEL);
+ if (!dsi_pd) {
+ dev_err(dev, "failed to allocate dsi platform data\n");
+ return NULL;
+ }
+
+ prop_data = of_get_property(node, "samsung,phy-type", NULL);
+ if (!prop_data) {
+ dev_err(dev, "failed to get phy-type property\n");
+ goto err_free_pd;
+ }
+
+ val = be32_to_cpu(*prop_data);
+ if (val >= ARRAY_SIZE(of_phy_enables) || !of_phy_enables[val]) {
+ dev_err(dev, "Invalid phy-type %u\n", val);
+ goto err_free_pd;
+ }
+ dsi_pd->phy_enable = of_phy_enables[val];
+
+ prop_data = of_get_property(node, "samsung,pll-stable-time", NULL);
+ if (!prop_data) {
+ dev_err(dev, "failed to get pll-stable-time property\n");
+ goto err_free_pd;
+ }
+ dsi_pd->pll_stable_time = be32_to_cpu(*prop_data);
+
+ prop_data = of_get_property(node, "samsung,stop-holding-count", NULL);
+ if (!prop_data) {
+ dev_err(dev, "failed to get stop-holding-count property\n");
+ goto err_free_pd;
+ }
+ dsi_pd->stop_holding_cnt = be32_to_cpu(*prop_data);
+
+ prop_data = of_get_property(node, "samsung,bta-timeout", NULL);
+ if (!prop_data) {
+ dev_err(dev, "failed to get bta-timeout property\n");
+ goto err_free_pd;
+ }
+ dsi_pd->bta_timeout = be32_to_cpu(*prop_data);
+
+ prop_data = of_get_property(node, "samsung,rx-timeout", NULL);
+ if (!prop_data) {
+ dev_err(dev, "failed to get rx-timeout property\n");
+ goto err_free_pd;
+ }
+ dsi_pd->rx_timeout = be32_to_cpu(*prop_data);
+
+ prop_data = of_get_property(node, "samsung,pll-clk-freq", NULL);
+ if (!prop_data) {
+ dev_err(dev, "failed to get pll-clk-freq property\n");
+ goto err_free_pd;
+ }
+ dsi_pd->pll_clk_rate = be32_to_cpu(*prop_data);
+
+ return dsi_pd;
+
+err_free_pd:
+ kfree(dsi_pd);
+
+ return NULL;
+}
+
+static struct of_device_id exynos_dsi_of_match[] = {
+ { .compatible = "samsung,exynos4210-mipi-dsi" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
+#else
+static struct exynos_dsi_platform_data *exynos_dsi_parse_dt(
+ struct platform_device *pdev)
+{
+ return NULL;
+}
+#endif
+
+/*
+ * Platform driver
+ */
+
+static int exynos_dsi_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct exynos_dsi *dsi;
+ int ret;
+
+ dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi) {
+ dev_err(&pdev->dev, "failed to allocate dsi object.\n");
+ return -ENOMEM;
+ }
+
+ spin_lock_init(&dsi->transfer_lock);
+ INIT_LIST_HEAD(&dsi->transfer_list);
+
+ dsi->dev = &pdev->dev;
+ dsi->pd = pdev->dev.platform_data;
+
+ if (dsi->pd == NULL && pdev->dev.of_node)
+ dsi->pd = exynos_dsi_parse_dt(pdev);
+
+ if (dsi->pd == NULL) {
+ dev_err(&pdev->dev, "failed to get platform data for dsi.\n");
+ return -EINVAL;
+ }
+
+ dsi->supplies[0].supply = "vdd11";
+ dsi->supplies[1].supply = "vdd18";
+ ret = devm_regulator_bulk_get(&pdev->dev,
+ ARRAY_SIZE(dsi->supplies), dsi->supplies);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to get regulators: %d\n", ret);
+ return ret;
+ }
+
+ dsi->pll_clk = devm_clk_get(&pdev->dev, "pll_clk");
+ if (IS_ERR(dsi->pll_clk)) {
+ dev_err(&pdev->dev, "failed to get dsi pll input clock\n");
+ return -ENODEV;
+ }
+
+ dsi->bus_clk = devm_clk_get(&pdev->dev, "bus_clk");
+ if (IS_ERR(dsi->bus_clk)) {
+ dev_err(&pdev->dev, "failed to get dsi bus clock\n");
+ return -ENODEV;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to get io memory region\n");
+ return -ENODEV;
+ }
+
+ dsi->reg_base = devm_request_and_ioremap(&pdev->dev, res);
+ if (!dsi->reg_base) {
+ dev_err(&pdev->dev, "failed to remap io region\n");
+ return -ENOMEM;
+ }
+
+ platform_set_drvdata(pdev, dsi);
+
+ pm_runtime_set_suspended(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ pm_runtime_get_sync(&pdev->dev);
+ writel(~0, dsi->reg_base + DSIM_INTMSK_REG);
+ pm_runtime_put_sync(&pdev->dev);
+
+ dsi->irq = platform_get_irq(pdev, 0);
+ if (dsi->irq < 0) {
+ dev_err(&pdev->dev, "failed to request dsi irq resource\n");
+ return -EINVAL;
+ }
+
+ ret = devm_request_irq(&pdev->dev, dsi->irq, exynos_dsi_irq,
+ 0, dev_name(&pdev->dev), dsi);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request dsi irq\n");
+ return ret;
+ }
+
+ dsi->out.name = dev_name(&pdev->dev);
+ dsi->out.id = -1;
+ dsi->out.of_node = pdev->dev.of_node;
+ dsi->out.common_ops = &exynos_dsi_common_ops;
+ dsi->out.ops.dsi = &exynos_dsi_ops;
+
+ ret = video_source_register(&dsi->out);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register video source\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devexit exynos_dsi_remove(struct platform_device *pdev)
+{
+ struct exynos_dsi *dsi = platform_get_drvdata(pdev);
+
+ video_source_unregister(&dsi->out);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+/*
+ * Power management
+ */
+
+static int exynos_dsi_runtime_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct exynos_dsi *dsi = platform_get_drvdata(pdev);
+
+ dev_info(dev, "%s\n", __func__);
+
+ if (dsi->pd->phy_enable)
+ dsi->pd->phy_enable(pdev, false);
+
+ clk_disable_unprepare(dsi->pll_clk);
+ clk_disable_unprepare(dsi->bus_clk);
+
+ regulator_bulk_disable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+
+ return 0;
+}
+
+static int exynos_dsi_runtime_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct exynos_dsi *dsi = platform_get_drvdata(pdev);
+
+ dev_info(dev, "%s\n", __func__);
+
+ regulator_bulk_enable(ARRAY_SIZE(dsi->supplies), dsi->supplies);
+
+ clk_prepare_enable(dsi->bus_clk);
+ clk_prepare_enable(dsi->pll_clk);
+
+ if (dsi->pd->phy_enable)
+ dsi->pd->phy_enable(pdev, true);
+
+ return 0;
+}
+
+static int exynos_dsi_suspend(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return exynos_dsi_runtime_suspend(dev);
+}
+
+static int exynos_dsi_resume(struct device *dev)
+{
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return exynos_dsi_runtime_resume(dev);
+}
+
+static const struct dev_pm_ops exynos_dsi_pm_ops = {
+ SET_RUNTIME_PM_OPS(exynos_dsi_runtime_suspend,
+ exynos_dsi_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(exynos_dsi_suspend, exynos_dsi_resume)
+};
+
+/*
+ * Module
+ */
+
+static struct platform_driver exynos_dsi_driver = {
+ .probe = exynos_dsi_probe,
+ .remove = __devexit_p(exynos_dsi_remove),
+ .driver = {
+ .name = "exynos-dsi",
+ .owner = THIS_MODULE,
+ .pm = &exynos_dsi_pm_ops,
+ .of_match_table = of_match_ptr(exynos_dsi_of_match),
+ },
+};
+
+module_platform_driver(exynos_dsi_driver);
+
+MODULE_AUTHOR("Tomasz Figa <t.figa at samsung.com>");
+MODULE_DESCRIPTION("Samsung SoC MIPI DSI Master");
+MODULE_LICENSE("GPL");
diff --git a/include/video/exynos_dsi.h b/include/video/exynos_dsi.h
new file mode 100644
index 0000000..95e1568
--- /dev/null
+++ b/include/video/exynos_dsi.h
@@ -0,0 +1,41 @@
+/* include/video/exynos_mipi_dsim.h
+ *
+ * Platform data header for Samsung SoC MIPI-DSIM.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd
+ *
+ * InKi Dae <inki.dae at samsung.com>
+ * Donghwa Lee <dh09.lee at samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef _EXYNOS_MIPI_DSIM_H
+#define _EXYNOS_MIPI_DSIM_H
+
+#include <linux/device.h>
+
+/*
+ * struct exynos_dsi_platform_data - interface to platform data
+ * for mipi-dsi driver.
+ *
+ * TODO
+ */
+struct exynos_dsi_platform_data {
+ unsigned int enabled;
+
+ int (*phy_enable)(struct platform_device *pdev, bool on);
+
+ unsigned int pll_stable_time;
+ unsigned long pll_clk_rate;
+ unsigned long esc_clk_rate;
+ unsigned short stop_holding_cnt;
+ unsigned char bta_timeout;
+ unsigned short rx_timeout;
+};
+
+int s5p_dsim_phy_enable(struct platform_device *pdev, bool on);
+
+#endif /* _EXYNOS_MIPI_DSIM_H */
--
1.8.1
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