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path: root/drivers/video/fbdev/exynos/exynos_mipi_dsi_common.c
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Diffstat (limited to 'drivers/video/fbdev/exynos/exynos_mipi_dsi_common.c')
-rw-r--r--drivers/video/fbdev/exynos/exynos_mipi_dsi_common.c880
1 files changed, 880 insertions, 0 deletions
diff --git a/drivers/video/fbdev/exynos/exynos_mipi_dsi_common.c b/drivers/video/fbdev/exynos/exynos_mipi_dsi_common.c
new file mode 100644
index 000000000000..85edabfdef5a
--- /dev/null
+++ b/drivers/video/fbdev/exynos/exynos_mipi_dsi_common.c
@@ -0,0 +1,880 @@
+/* linux/drivers/video/exynos/exynos_mipi_dsi_common.c
+ *
+ * Samsung SoC MIPI-DSI common driver.
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd
+ *
+ * InKi Dae, <inki.dae@samsung.com>
+ * Donghwa Lee, <dh09.lee@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/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/wait.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/ctype.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/memory.h>
+#include <linux/delay.h>
+#include <linux/irqreturn.h>
+#include <linux/kthread.h>
+
+#include <video/mipi_display.h>
+#include <video/exynos_mipi_dsim.h>
+
+#include "exynos_mipi_dsi_regs.h"
+#include "exynos_mipi_dsi_lowlevel.h"
+#include "exynos_mipi_dsi_common.h"
+
+#define MIPI_FIFO_TIMEOUT msecs_to_jiffies(250)
+#define MIPI_RX_FIFO_READ_DONE 0x30800002
+#define MIPI_MAX_RX_FIFO 20
+#define MHZ (1000 * 1000)
+#define FIN_HZ (24 * MHZ)
+
+#define DFIN_PLL_MIN_HZ (6 * MHZ)
+#define DFIN_PLL_MAX_HZ (12 * MHZ)
+
+#define DFVCO_MIN_HZ (500 * MHZ)
+#define DFVCO_MAX_HZ (1000 * MHZ)
+
+#define TRY_GET_FIFO_TIMEOUT (5000 * 2)
+#define TRY_FIFO_CLEAR (10)
+
+/* MIPI-DSIM status types. */
+enum {
+ DSIM_STATE_INIT, /* should be initialized. */
+ DSIM_STATE_STOP, /* CPU and LCDC are LP mode. */
+ DSIM_STATE_HSCLKEN, /* HS clock was enabled. */
+ DSIM_STATE_ULPS
+};
+
+/* define DSI lane types. */
+enum {
+ DSIM_LANE_CLOCK = (1 << 0),
+ DSIM_LANE_DATA0 = (1 << 1),
+ DSIM_LANE_DATA1 = (1 << 2),
+ DSIM_LANE_DATA2 = (1 << 3),
+ DSIM_LANE_DATA3 = (1 << 4)
+};
+
+static unsigned int dpll_table[15] = {
+ 100, 120, 170, 220, 270,
+ 320, 390, 450, 510, 560,
+ 640, 690, 770, 870, 950
+};
+
+irqreturn_t exynos_mipi_dsi_interrupt_handler(int irq, void *dev_id)
+{
+ struct mipi_dsim_device *dsim = dev_id;
+ unsigned int intsrc, intmsk;
+
+ intsrc = exynos_mipi_dsi_read_interrupt(dsim);
+ intmsk = exynos_mipi_dsi_read_interrupt_mask(dsim);
+ intmsk = ~intmsk & intsrc;
+
+ if (intsrc & INTMSK_RX_DONE) {
+ complete(&dsim_rd_comp);
+ dev_dbg(dsim->dev, "MIPI INTMSK_RX_DONE\n");
+ }
+ if (intsrc & INTMSK_FIFO_EMPTY) {
+ complete(&dsim_wr_comp);
+ dev_dbg(dsim->dev, "MIPI INTMSK_FIFO_EMPTY\n");
+ }
+
+ exynos_mipi_dsi_clear_interrupt(dsim, intmsk);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * write long packet to mipi dsi slave
+ * @dsim: mipi dsim device structure.
+ * @data0: packet data to send.
+ * @data1: size of packet data
+ */
+static void exynos_mipi_dsi_long_data_wr(struct mipi_dsim_device *dsim,
+ const unsigned char *data0, unsigned int data_size)
+{
+ unsigned int data_cnt = 0, payload = 0;
+
+ /* in case that data count is more then 4 */
+ for (data_cnt = 0; data_cnt < data_size; data_cnt += 4) {
+ /*
+ * after sending 4bytes per one time,
+ * send remainder data less then 4.
+ */
+ if ((data_size - data_cnt) < 4) {
+ if ((data_size - data_cnt) == 3) {
+ payload = data0[data_cnt] |
+ data0[data_cnt + 1] << 8 |
+ data0[data_cnt + 2] << 16;
+ dev_dbg(dsim->dev, "count = 3 payload = %x, %x %x %x\n",
+ payload, data0[data_cnt],
+ data0[data_cnt + 1],
+ data0[data_cnt + 2]);
+ } else if ((data_size - data_cnt) == 2) {
+ payload = data0[data_cnt] |
+ data0[data_cnt + 1] << 8;
+ dev_dbg(dsim->dev,
+ "count = 2 payload = %x, %x %x\n", payload,
+ data0[data_cnt],
+ data0[data_cnt + 1]);
+ } else if ((data_size - data_cnt) == 1) {
+ payload = data0[data_cnt];
+ }
+
+ exynos_mipi_dsi_wr_tx_data(dsim, payload);
+ /* send 4bytes per one time. */
+ } else {
+ payload = data0[data_cnt] |
+ data0[data_cnt + 1] << 8 |
+ data0[data_cnt + 2] << 16 |
+ data0[data_cnt + 3] << 24;
+
+ dev_dbg(dsim->dev,
+ "count = 4 payload = %x, %x %x %x %x\n",
+ payload, *(u8 *)(data0 + data_cnt),
+ data0[data_cnt + 1],
+ data0[data_cnt + 2],
+ data0[data_cnt + 3]);
+
+ exynos_mipi_dsi_wr_tx_data(dsim, payload);
+ }
+ }
+}
+
+int exynos_mipi_dsi_wr_data(struct mipi_dsim_device *dsim, unsigned int data_id,
+ const unsigned char *data0, unsigned int data_size)
+{
+ unsigned int check_rx_ack = 0;
+
+ if (dsim->state == DSIM_STATE_ULPS) {
+ dev_err(dsim->dev, "state is ULPS.\n");
+
+ return -EINVAL;
+ }
+
+ /* FIXME!!! why does it need this delay? */
+ msleep(20);
+
+ mutex_lock(&dsim->lock);
+
+ switch (data_id) {
+ /* short packet types of packet types for command. */
+ case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
+ case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
+ case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
+ case MIPI_DSI_DCS_SHORT_WRITE:
+ case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
+ case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
+ exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0[0], data0[1]);
+ if (check_rx_ack) {
+ /* process response func should be implemented */
+ mutex_unlock(&dsim->lock);
+ return 0;
+ } else {
+ mutex_unlock(&dsim->lock);
+ return -EINVAL;
+ }
+
+ /* general command */
+ case MIPI_DSI_COLOR_MODE_OFF:
+ case MIPI_DSI_COLOR_MODE_ON:
+ case MIPI_DSI_SHUTDOWN_PERIPHERAL:
+ case MIPI_DSI_TURN_ON_PERIPHERAL:
+ exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0[0], data0[1]);
+ if (check_rx_ack) {
+ /* process response func should be implemented. */
+ mutex_unlock(&dsim->lock);
+ return 0;
+ } else {
+ mutex_unlock(&dsim->lock);
+ return -EINVAL;
+ }
+
+ /* packet types for video data */
+ case MIPI_DSI_V_SYNC_START:
+ case MIPI_DSI_V_SYNC_END:
+ case MIPI_DSI_H_SYNC_START:
+ case MIPI_DSI_H_SYNC_END:
+ case MIPI_DSI_END_OF_TRANSMISSION:
+ mutex_unlock(&dsim->lock);
+ return 0;
+
+ /* long packet type and null packet */
+ case MIPI_DSI_NULL_PACKET:
+ case MIPI_DSI_BLANKING_PACKET:
+ mutex_unlock(&dsim->lock);
+ return 0;
+ case MIPI_DSI_GENERIC_LONG_WRITE:
+ case MIPI_DSI_DCS_LONG_WRITE:
+ {
+ unsigned int size, payload = 0;
+ reinit_completion(&dsim_wr_comp);
+
+ size = data_size * 4;
+
+ /* if data count is less then 4, then send 3bytes data. */
+ if (data_size < 4) {
+ payload = data0[0] |
+ data0[1] << 8 |
+ data0[2] << 16;
+
+ exynos_mipi_dsi_wr_tx_data(dsim, payload);
+
+ dev_dbg(dsim->dev, "count = %d payload = %x,%x %x %x\n",
+ data_size, payload, data0[0],
+ data0[1], data0[2]);
+
+ /* in case that data count is more then 4 */
+ } else
+ exynos_mipi_dsi_long_data_wr(dsim, data0, data_size);
+
+ /* put data into header fifo */
+ exynos_mipi_dsi_wr_tx_header(dsim, data_id, data_size & 0xff,
+ (data_size & 0xff00) >> 8);
+
+ if (!wait_for_completion_interruptible_timeout(&dsim_wr_comp,
+ MIPI_FIFO_TIMEOUT)) {
+ dev_warn(dsim->dev, "command write timeout.\n");
+ mutex_unlock(&dsim->lock);
+ return -EAGAIN;
+ }
+
+ if (check_rx_ack) {
+ /* process response func should be implemented. */
+ mutex_unlock(&dsim->lock);
+ return 0;
+ } else {
+ mutex_unlock(&dsim->lock);
+ return -EINVAL;
+ }
+ }
+
+ /* packet typo for video data */
+ case MIPI_DSI_PACKED_PIXEL_STREAM_16:
+ case MIPI_DSI_PACKED_PIXEL_STREAM_18:
+ case MIPI_DSI_PIXEL_STREAM_3BYTE_18:
+ case MIPI_DSI_PACKED_PIXEL_STREAM_24:
+ if (check_rx_ack) {
+ /* process response func should be implemented. */
+ mutex_unlock(&dsim->lock);
+ return 0;
+ } else {
+ mutex_unlock(&dsim->lock);
+ return -EINVAL;
+ }
+ default:
+ dev_warn(dsim->dev,
+ "data id %x is not supported current DSI spec.\n",
+ data_id);
+
+ mutex_unlock(&dsim->lock);
+ return -EINVAL;
+ }
+}
+
+static unsigned int exynos_mipi_dsi_long_data_rd(struct mipi_dsim_device *dsim,
+ unsigned int req_size, unsigned int rx_data, u8 *rx_buf)
+{
+ unsigned int rcv_pkt, i, j;
+ u16 rxsize;
+
+ /* for long packet */
+ rxsize = (u16)((rx_data & 0x00ffff00) >> 8);
+ dev_dbg(dsim->dev, "mipi dsi rx size : %d\n", rxsize);
+ if (rxsize != req_size) {
+ dev_dbg(dsim->dev,
+ "received size mismatch received: %d, requested: %d\n",
+ rxsize, req_size);
+ goto err;
+ }
+
+ for (i = 0; i < (rxsize >> 2); i++) {
+ rcv_pkt = exynos_mipi_dsi_rd_rx_fifo(dsim);
+ dev_dbg(dsim->dev, "received pkt : %08x\n", rcv_pkt);
+ for (j = 0; j < 4; j++) {
+ rx_buf[(i * 4) + j] =
+ (u8)(rcv_pkt >> (j * 8)) & 0xff;
+ dev_dbg(dsim->dev, "received value : %02x\n",
+ (rcv_pkt >> (j * 8)) & 0xff);
+ }
+ }
+ if (rxsize % 4) {
+ rcv_pkt = exynos_mipi_dsi_rd_rx_fifo(dsim);
+ dev_dbg(dsim->dev, "received pkt : %08x\n", rcv_pkt);
+ for (j = 0; j < (rxsize % 4); j++) {
+ rx_buf[(i * 4) + j] =
+ (u8)(rcv_pkt >> (j * 8)) & 0xff;
+ dev_dbg(dsim->dev, "received value : %02x\n",
+ (rcv_pkt >> (j * 8)) & 0xff);
+ }
+ }
+
+ return rxsize;
+
+err:
+ return -EINVAL;
+}
+
+static unsigned int exynos_mipi_dsi_response_size(unsigned int req_size)
+{
+ switch (req_size) {
+ case 1:
+ return MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE;
+ case 2:
+ return MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE;
+ default:
+ return MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE;
+ }
+}
+
+int exynos_mipi_dsi_rd_data(struct mipi_dsim_device *dsim, unsigned int data_id,
+ unsigned int data0, unsigned int req_size, u8 *rx_buf)
+{
+ unsigned int rx_data, rcv_pkt, i;
+ u8 response = 0;
+ u16 rxsize;
+
+ if (dsim->state == DSIM_STATE_ULPS) {
+ dev_err(dsim->dev, "state is ULPS.\n");
+
+ return -EINVAL;
+ }
+
+ /* FIXME!!! */
+ msleep(20);
+
+ mutex_lock(&dsim->lock);
+ reinit_completion(&dsim_rd_comp);
+ exynos_mipi_dsi_rd_tx_header(dsim,
+ MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, req_size);
+
+ response = exynos_mipi_dsi_response_size(req_size);
+
+ switch (data_id) {
+ case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
+ case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
+ case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
+ case MIPI_DSI_DCS_READ:
+ exynos_mipi_dsi_rd_tx_header(dsim,
+ data_id, data0);
+ /* process response func should be implemented. */
+ break;
+ default:
+ dev_warn(dsim->dev,
+ "data id %x is not supported current DSI spec.\n",
+ data_id);
+
+ mutex_unlock(&dsim->lock);
+ return -EINVAL;
+ }
+
+ if (!wait_for_completion_interruptible_timeout(&dsim_rd_comp,
+ MIPI_FIFO_TIMEOUT)) {
+ pr_err("RX done interrupt timeout\n");
+ mutex_unlock(&dsim->lock);
+ return 0;
+ }
+
+ msleep(20);
+
+ rx_data = exynos_mipi_dsi_rd_rx_fifo(dsim);
+
+ if ((u8)(rx_data & 0xff) != response) {
+ printk(KERN_ERR
+ "mipi dsi wrong response rx_data : %x, response:%x\n",
+ rx_data, response);
+ goto clear_rx_fifo;
+ }
+
+ if (req_size <= 2) {
+ /* for short packet */
+ for (i = 0; i < req_size; i++)
+ rx_buf[i] = (rx_data >> (8 + (i * 8))) & 0xff;
+ rxsize = req_size;
+ } else {
+ /* for long packet */
+ rxsize = exynos_mipi_dsi_long_data_rd(dsim, req_size, rx_data,
+ rx_buf);
+ if (rxsize != req_size)
+ goto clear_rx_fifo;
+ }
+
+ rcv_pkt = exynos_mipi_dsi_rd_rx_fifo(dsim);
+
+ msleep(20);
+
+ if (rcv_pkt != MIPI_RX_FIFO_READ_DONE) {
+ dev_info(dsim->dev,
+ "Can't found RX FIFO READ DONE FLAG : %x\n", rcv_pkt);
+ goto clear_rx_fifo;
+ }
+
+ mutex_unlock(&dsim->lock);
+
+ return rxsize;
+
+clear_rx_fifo:
+ i = 0;
+ while (1) {
+ rcv_pkt = exynos_mipi_dsi_rd_rx_fifo(dsim);
+ if ((rcv_pkt == MIPI_RX_FIFO_READ_DONE)
+ || (i > MIPI_MAX_RX_FIFO))
+ break;
+ dev_dbg(dsim->dev,
+ "mipi dsi clear rx fifo : %08x\n", rcv_pkt);
+ i++;
+ }
+ dev_info(dsim->dev,
+ "mipi dsi rx done count : %d, rcv_pkt : %08x\n", i, rcv_pkt);
+
+ mutex_unlock(&dsim->lock);
+
+ return 0;
+}
+
+static int exynos_mipi_dsi_pll_on(struct mipi_dsim_device *dsim,
+ unsigned int enable)
+{
+ int sw_timeout;
+
+ if (enable) {
+ sw_timeout = 1000;
+
+ exynos_mipi_dsi_enable_pll(dsim, 1);
+ while (1) {
+ sw_timeout--;
+ if (exynos_mipi_dsi_is_pll_stable(dsim))
+ return 0;
+ if (sw_timeout == 0)
+ return -EINVAL;
+ }
+ } else
+ exynos_mipi_dsi_enable_pll(dsim, 0);
+
+ return 0;
+}
+
+static unsigned long exynos_mipi_dsi_change_pll(struct mipi_dsim_device *dsim,
+ unsigned int pre_divider, unsigned int main_divider,
+ unsigned int scaler)
+{
+ unsigned long dfin_pll, dfvco, dpll_out;
+ unsigned int i, freq_band = 0xf;
+
+ dfin_pll = (FIN_HZ / pre_divider);
+
+ /******************************************************
+ * Serial Clock(=ByteClk X 8) FreqBand[3:0] *
+ ******************************************************
+ * ~ 99.99 MHz 0000
+ * 100 ~ 119.99 MHz 0001
+ * 120 ~ 159.99 MHz 0010
+ * 160 ~ 199.99 MHz 0011
+ * 200 ~ 239.99 MHz 0100
+ * 140 ~ 319.99 MHz 0101
+ * 320 ~ 389.99 MHz 0110
+ * 390 ~ 449.99 MHz 0111
+ * 450 ~ 509.99 MHz 1000
+ * 510 ~ 559.99 MHz 1001
+ * 560 ~ 639.99 MHz 1010
+ * 640 ~ 689.99 MHz 1011
+ * 690 ~ 769.99 MHz 1100
+ * 770 ~ 869.99 MHz 1101
+ * 870 ~ 949.99 MHz 1110
+ * 950 ~ 1000 MHz 1111
+ ******************************************************/
+ if (dfin_pll < DFIN_PLL_MIN_HZ || dfin_pll > DFIN_PLL_MAX_HZ) {
+ dev_warn(dsim->dev, "fin_pll range should be 6MHz ~ 12MHz\n");
+ exynos_mipi_dsi_enable_afc(dsim, 0, 0);
+ } else {
+ if (dfin_pll < 7 * MHZ)
+ exynos_mipi_dsi_enable_afc(dsim, 1, 0x1);
+ else if (dfin_pll < 8 * MHZ)
+ exynos_mipi_dsi_enable_afc(dsim, 1, 0x0);
+ else if (dfin_pll < 9 * MHZ)
+ exynos_mipi_dsi_enable_afc(dsim, 1, 0x3);
+ else if (dfin_pll < 10 * MHZ)
+ exynos_mipi_dsi_enable_afc(dsim, 1, 0x2);
+ else if (dfin_pll < 11 * MHZ)
+ exynos_mipi_dsi_enable_afc(dsim, 1, 0x5);
+ else
+ exynos_mipi_dsi_enable_afc(dsim, 1, 0x4);
+ }
+
+ dfvco = dfin_pll * main_divider;
+ dev_dbg(dsim->dev, "dfvco = %lu, dfin_pll = %lu, main_divider = %d\n",
+ dfvco, dfin_pll, main_divider);
+ if (dfvco < DFVCO_MIN_HZ || dfvco > DFVCO_MAX_HZ)
+ dev_warn(dsim->dev, "fvco range should be 500MHz ~ 1000MHz\n");
+
+ dpll_out = dfvco / (1 << scaler);
+ dev_dbg(dsim->dev, "dpll_out = %lu, dfvco = %lu, scaler = %d\n",
+ dpll_out, dfvco, scaler);
+
+ for (i = 0; i < ARRAY_SIZE(dpll_table); i++) {
+ if (dpll_out < dpll_table[i] * MHZ) {
+ freq_band = i;
+ break;
+ }
+ }
+
+ dev_dbg(dsim->dev, "freq_band = %d\n", freq_band);
+
+ exynos_mipi_dsi_pll_freq(dsim, pre_divider, main_divider, scaler);
+
+ exynos_mipi_dsi_hs_zero_ctrl(dsim, 0);
+ exynos_mipi_dsi_prep_ctrl(dsim, 0);
+
+ /* Freq Band */
+ exynos_mipi_dsi_pll_freq_band(dsim, freq_band);
+
+ /* Stable time */
+ exynos_mipi_dsi_pll_stable_time(dsim, dsim->dsim_config->pll_stable_time);
+
+ /* Enable PLL */
+ dev_dbg(dsim->dev, "FOUT of mipi dphy pll is %luMHz\n",
+ (dpll_out / MHZ));
+
+ return dpll_out;
+}
+
+static int exynos_mipi_dsi_set_clock(struct mipi_dsim_device *dsim,
+ unsigned int byte_clk_sel, unsigned int enable)
+{
+ unsigned int esc_div;
+ unsigned long esc_clk_error_rate;
+ unsigned long hs_clk = 0, byte_clk = 0, escape_clk = 0;
+
+ if (enable) {
+ dsim->e_clk_src = byte_clk_sel;
+
+ /* Escape mode clock and byte clock source */
+ exynos_mipi_dsi_set_byte_clock_src(dsim, byte_clk_sel);
+
+ /* DPHY, DSIM Link : D-PHY clock out */
+ if (byte_clk_sel == DSIM_PLL_OUT_DIV8) {
+ hs_clk = exynos_mipi_dsi_change_pll(dsim,
+ dsim->dsim_config->p, dsim->dsim_config->m,
+ dsim->dsim_config->s);
+ if (hs_clk == 0) {
+ dev_err(dsim->dev,
+ "failed to get hs clock.\n");
+ return -EINVAL;
+ }
+
+ byte_clk = hs_clk / 8;
+ exynos_mipi_dsi_enable_pll_bypass(dsim, 0);
+ exynos_mipi_dsi_pll_on(dsim, 1);
+ /* DPHY : D-PHY clock out, DSIM link : external clock out */
+ } else if (byte_clk_sel == DSIM_EXT_CLK_DIV8) {
+ dev_warn(dsim->dev, "this project is not support\n");
+ dev_warn(dsim->dev,
+ "external clock source for MIPI DSIM.\n");
+ } else if (byte_clk_sel == DSIM_EXT_CLK_BYPASS) {
+ dev_warn(dsim->dev, "this project is not support\n");
+ dev_warn(dsim->dev,
+ "external clock source for MIPI DSIM\n");
+ }
+
+ /* escape clock divider */
+ esc_div = byte_clk / (dsim->dsim_config->esc_clk);
+ dev_dbg(dsim->dev,
+ "esc_div = %d, byte_clk = %lu, esc_clk = %lu\n",
+ esc_div, byte_clk, dsim->dsim_config->esc_clk);
+ if ((byte_clk / esc_div) >= (20 * MHZ) ||
+ (byte_clk / esc_div) >
+ dsim->dsim_config->esc_clk)
+ esc_div += 1;
+
+ escape_clk = byte_clk / esc_div;
+ dev_dbg(dsim->dev,
+ "escape_clk = %lu, byte_clk = %lu, esc_div = %d\n",
+ escape_clk, byte_clk, esc_div);
+
+ /* enable escape clock. */
+ exynos_mipi_dsi_enable_byte_clock(dsim, 1);
+
+ /* enable byte clk and escape clock */
+ exynos_mipi_dsi_set_esc_clk_prs(dsim, 1, esc_div);
+ /* escape clock on lane */
+ exynos_mipi_dsi_enable_esc_clk_on_lane(dsim,
+ (DSIM_LANE_CLOCK | dsim->data_lane), 1);
+
+ dev_dbg(dsim->dev, "byte clock is %luMHz\n",
+ (byte_clk / MHZ));
+ dev_dbg(dsim->dev, "escape clock that user's need is %lu\n",
+ (dsim->dsim_config->esc_clk / MHZ));
+ dev_dbg(dsim->dev, "escape clock divider is %x\n", esc_div);
+ dev_dbg(dsim->dev, "escape clock is %luMHz\n",
+ ((byte_clk / esc_div) / MHZ));
+
+ if ((byte_clk / esc_div) > escape_clk) {
+ esc_clk_error_rate = escape_clk /
+ (byte_clk / esc_div);
+ dev_warn(dsim->dev, "error rate is %lu over.\n",
+ (esc_clk_error_rate / 100));
+ } else if ((byte_clk / esc_div) < (escape_clk)) {
+ esc_clk_error_rate = (byte_clk / esc_div) /
+ escape_clk;
+ dev_warn(dsim->dev, "error rate is %lu under.\n",
+ (esc_clk_error_rate / 100));
+ }
+ } else {
+ exynos_mipi_dsi_enable_esc_clk_on_lane(dsim,
+ (DSIM_LANE_CLOCK | dsim->data_lane), 0);
+ exynos_mipi_dsi_set_esc_clk_prs(dsim, 0, 0);
+
+ /* disable escape clock. */
+ exynos_mipi_dsi_enable_byte_clock(dsim, 0);
+
+ if (byte_clk_sel == DSIM_PLL_OUT_DIV8)
+ exynos_mipi_dsi_pll_on(dsim, 0);
+ }
+
+ return 0;
+}
+
+int exynos_mipi_dsi_init_dsim(struct mipi_dsim_device *dsim)
+{
+ dsim->state = DSIM_STATE_INIT;
+
+ switch (dsim->dsim_config->e_no_data_lane) {
+ case DSIM_DATA_LANE_1:
+ dsim->data_lane = DSIM_LANE_DATA0;
+ break;
+ case DSIM_DATA_LANE_2:
+ dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1;
+ break;
+ case DSIM_DATA_LANE_3:
+ dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1 |
+ DSIM_LANE_DATA2;
+ break;
+ case DSIM_DATA_LANE_4:
+ dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1 |
+ DSIM_LANE_DATA2 | DSIM_LANE_DATA3;
+ break;
+ default:
+ dev_info(dsim->dev, "data lane is invalid.\n");
+ return -EINVAL;
+ }
+
+ exynos_mipi_dsi_sw_reset(dsim);
+ exynos_mipi_dsi_func_reset(dsim);
+
+ exynos_mipi_dsi_dp_dn_swap(dsim, 0);
+
+ return 0;
+}
+
+void exynos_mipi_dsi_init_interrupt(struct mipi_dsim_device *dsim)
+{
+ unsigned int src = 0;
+
+ src = (INTSRC_SFR_FIFO_EMPTY | INTSRC_RX_DATA_DONE);
+ exynos_mipi_dsi_set_interrupt(dsim, src, 1);
+
+ src = 0;
+ src = ~(INTMSK_RX_DONE | INTMSK_FIFO_EMPTY);
+ exynos_mipi_dsi_set_interrupt_mask(dsim, src, 1);
+}
+
+int exynos_mipi_dsi_enable_frame_done_int(struct mipi_dsim_device *dsim,
+ unsigned int enable)
+{
+ /* enable only frame done interrupt */
+ exynos_mipi_dsi_set_interrupt_mask(dsim, INTMSK_FRAME_DONE, enable);
+
+ return 0;
+}
+
+void exynos_mipi_dsi_stand_by(struct mipi_dsim_device *dsim,
+ unsigned int enable)
+{
+
+ /* consider Main display and Sub display. */
+
+ exynos_mipi_dsi_set_main_stand_by(dsim, enable);
+}
+
+int exynos_mipi_dsi_set_display_mode(struct mipi_dsim_device *dsim,
+ struct mipi_dsim_config *dsim_config)
+{
+ struct mipi_dsim_platform_data *dsim_pd;
+ struct fb_videomode *timing;
+
+ dsim_pd = (struct mipi_dsim_platform_data *)dsim->pd;
+ timing = (struct fb_videomode *)dsim_pd->lcd_panel_info;
+
+ /* in case of VIDEO MODE (RGB INTERFACE), it sets polarities. */
+ if (dsim_config->e_interface == (u32) DSIM_VIDEO) {
+ if (dsim_config->auto_vertical_cnt == 0) {
+ exynos_mipi_dsi_set_main_disp_vporch(dsim,
+ dsim_config->cmd_allow,
+ timing->lower_margin,
+ timing->upper_margin);
+ exynos_mipi_dsi_set_main_disp_hporch(dsim,
+ timing->right_margin,
+ timing->left_margin);
+ exynos_mipi_dsi_set_main_disp_sync_area(dsim,
+ timing->vsync_len,
+ timing->hsync_len);
+ }
+ }
+
+ exynos_mipi_dsi_set_main_disp_resol(dsim, timing->xres,
+ timing->yres);
+
+ exynos_mipi_dsi_display_config(dsim, dsim_config);
+
+ dev_info(dsim->dev, "lcd panel ==> width = %d, height = %d\n",
+ timing->xres, timing->yres);
+
+ return 0;
+}
+
+int exynos_mipi_dsi_init_link(struct mipi_dsim_device *dsim)
+{
+ unsigned int time_out = 100;
+
+ switch (dsim->state) {
+ case DSIM_STATE_INIT:
+ exynos_mipi_dsi_init_fifo_pointer(dsim, 0x1f);
+
+ /* dsi configuration */
+ exynos_mipi_dsi_init_config(dsim);
+ exynos_mipi_dsi_enable_lane(dsim, DSIM_LANE_CLOCK, 1);
+ exynos_mipi_dsi_enable_lane(dsim, dsim->data_lane, 1);
+
+ /* set clock configuration */
+ exynos_mipi_dsi_set_clock(dsim, dsim->dsim_config->e_byte_clk, 1);
+
+ /* check clock and data lane state are stop state */
+ while (!(exynos_mipi_dsi_is_lane_state(dsim))) {
+ time_out--;
+ if (time_out == 0) {
+ dev_err(dsim->dev,
+ "DSI Master is not stop state.\n");
+ dev_err(dsim->dev,
+ "Check initialization process\n");
+
+ return -EINVAL;
+ }
+ }
+ if (time_out != 0) {
+ dev_info(dsim->dev,
+ "DSI Master driver has been completed.\n");
+ dev_info(dsim->dev, "DSI Master state is stop state\n");
+ }
+
+ dsim->state = DSIM_STATE_STOP;
+
+ /* BTA sequence counters */
+ exynos_mipi_dsi_set_stop_state_counter(dsim,
+ dsim->dsim_config->stop_holding_cnt);
+ exynos_mipi_dsi_set_bta_timeout(dsim,
+ dsim->dsim_config->bta_timeout);
+ exynos_mipi_dsi_set_lpdr_timeout(dsim,
+ dsim->dsim_config->rx_timeout);
+
+ return 0;
+ default:
+ dev_info(dsim->dev, "DSI Master is already init.\n");
+ return 0;
+ }
+
+ return 0;
+}
+
+int exynos_mipi_dsi_set_hs_enable(struct mipi_dsim_device *dsim)
+{
+ if (dsim->state != DSIM_STATE_STOP) {
+ dev_warn(dsim->dev, "DSIM is not in stop state.\n");
+ return 0;
+ }
+
+ if (dsim->e_clk_src == DSIM_EXT_CLK_BYPASS) {
+ dev_warn(dsim->dev, "clock source is external bypass.\n");
+ return 0;
+ }
+
+ dsim->state = DSIM_STATE_HSCLKEN;
+
+ /* set LCDC and CPU transfer mode to HS. */
+ exynos_mipi_dsi_set_lcdc_transfer_mode(dsim, 0);
+ exynos_mipi_dsi_set_cpu_transfer_mode(dsim, 0);
+ exynos_mipi_dsi_enable_hs_clock(dsim, 1);
+
+ return 0;
+}
+
+int exynos_mipi_dsi_set_data_transfer_mode(struct mipi_dsim_device *dsim,
+ unsigned int mode)
+{
+ if (mode) {
+ if (dsim->state != DSIM_STATE_HSCLKEN) {
+ dev_err(dsim->dev, "HS Clock lane is not enabled.\n");
+ return -EINVAL;
+ }
+
+ exynos_mipi_dsi_set_lcdc_transfer_mode(dsim, 0);
+ } else {
+ if (dsim->state == DSIM_STATE_INIT || dsim->state ==
+ DSIM_STATE_ULPS) {
+ dev_err(dsim->dev,
+ "DSI Master is not STOP or HSDT state.\n");
+ return -EINVAL;
+ }
+
+ exynos_mipi_dsi_set_cpu_transfer_mode(dsim, 0);
+ }
+
+ return 0;
+}
+
+int exynos_mipi_dsi_get_frame_done_status(struct mipi_dsim_device *dsim)
+{
+ return _exynos_mipi_dsi_get_frame_done_status(dsim);
+}
+
+int exynos_mipi_dsi_clear_frame_done(struct mipi_dsim_device *dsim)
+{
+ _exynos_mipi_dsi_clear_frame_done(dsim);
+
+ return 0;
+}
+
+int exynos_mipi_dsi_fifo_clear(struct mipi_dsim_device *dsim,
+ unsigned int val)
+{
+ int try = TRY_FIFO_CLEAR;
+
+ exynos_mipi_dsi_sw_reset_release(dsim);
+ exynos_mipi_dsi_func_reset(dsim);
+
+ do {
+ if (exynos_mipi_dsi_get_sw_reset_release(dsim)) {
+ exynos_mipi_dsi_init_interrupt(dsim);
+ dev_dbg(dsim->dev, "reset release done.\n");
+ return 0;
+ }
+ } while (--try);
+
+ dev_err(dsim->dev, "failed to clear dsim fifo.\n");
+ return -EAGAIN;
+}
+
+MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>");
+MODULE_DESCRIPTION("Samusung SoC MIPI-DSI common driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 08:05:51 +0100