From: Mythri P K <mythripk@xxxxxx> picodlp_i2c_client needs to send commands over i2c as a part of initialiazation. system controller dlp pico processor dpp2600 is used. It configures the splash screen of picodlp using a sequence of commands. A programmer's guide is available at: http://focus.ti.com/lit/ug/dlpu002a/dlpu002a.pdf API is defined for sending command over i2c as an i2c_write operation. Signed-off-by: Mythri P K <mythripk@xxxxxx> Signed-off-by: Mayuresh Janorkar <mayur@xxxxxx> --- drivers/video/omap2/displays/panel-picodlp.c | 317 ++++++++++++++++++++++++++ 1 files changed, 317 insertions(+), 0 deletions(-) diff --git a/drivers/video/omap2/displays/panel-picodlp.c b/drivers/video/omap2/displays/panel-picodlp.c index e361674..785e406 100644 --- a/drivers/video/omap2/displays/panel-picodlp.c +++ b/drivers/video/omap2/displays/panel-picodlp.c @@ -32,7 +32,15 @@ #include <plat/display.h> #include <plat/panel-picodlp.h> +#include "panel-picodlp.h" + #define DRIVER_NAME "picodlp_i2c_driver" + +/* This defines the minit of data which is allowed into single write block */ +#define MAX_I2C_WRITE_BLOCK_SIZE 32 +#define PICO_MAJOR 1 /* 2 bits */ +#define PICO_MINOR 1 /* 2 bits */ + struct picodlp_data { struct mutex lock; struct i2c_client *picodlp_i2c_client; @@ -50,6 +58,11 @@ struct i2c_device_id picodlp_i2c_id[] = { { "picodlp_i2c_driver", 0 }, }; +struct picodlp_i2c_command { + u8 reg; + u32 value; +}; + static struct omap_video_timings pico_ls_timings = { .x_res = 864, .y_res = 480, @@ -70,6 +83,305 @@ static inline struct picodlp_panel_data return (struct picodlp_panel_data *) dssdev->data; } +static int picodlp_i2c_write_block(struct i2c_client *client, + u8 *data, int len) +{ + struct i2c_msg msg; + int i, r; + + struct picodlp_i2c_data *picodlp_i2c_data = i2c_get_clientdata(client); + + if (len < 1 || len > MAX_I2C_WRITE_BLOCK_SIZE) { + dev_err(&client->dev, + "too long syn_write_block len %d\n", len); + return -EIO; + } + + mutex_lock(&picodlp_i2c_data->xfer_lock); + + msg.addr = client->addr; + msg.flags = 0; + msg.len = len; + msg.buf = data; + + r = i2c_transfer(client->adapter, &msg, 1); + mutex_unlock(&picodlp_i2c_data->xfer_lock); + + if (r == 1) { + for (i = 0; i < len; i++) + dev_dbg(&client->dev, + "addr %x bw 0x%02x[%d]: 0x%02x\n", + client->addr, data[0] + i, i, data[i]); + return 0; + } + + dev_err(&client->dev, " picodlp_i2c_write error\n"); + return r; +} + +static int picodlp_i2c_write(struct i2c_client *client, u8 reg, u32 value) +{ + u8 data[5]; + + data[0] = reg; + data[1] = (value & 0xFF000000) >> 24; + data[2] = (value & 0x00FF0000) >> 16; + data[3] = (value & 0x0000FF00) >> 8; + data[4] = (value & 0x000000FF); + + return picodlp_i2c_write_block(client, data, 5); +} + +static int picodlp_i2c_write_array(struct i2c_client *client, + const struct picodlp_i2c_command commands[], + int count) +{ + int i, r = 0; + for (i = 0; i < count; i++) { + r = picodlp_i2c_write(client, commands[i].reg, + commands[i].value); + if (r) + return r; + } + return r; +} + +/** + * picodlp_dpp2600_flash_dma - return parameter as 0 on success or error code + * Configure datapath for splash image operation + * dpp2600 : digitally programmable potentiometer + * It is a system controller used for picodlp + * + * @client: i2c_client required for operations + * @flash_address: splash image to be loaded from flash + * @flash_num_bytes: size in bytes for flash + * @cmt_seqz: select mailbox to load data to + * 0 = sequence/DRC, + * 1 = CMT/splash + * @table_number: table_number to load flash + * + * @return + * 0 - no errors + * -ENXIO - invalid flash address specified + * -EINVAL - invalid mailbox specified OR invalid table_number + * OR mailbox combination + */ +static int picodlp_dpp2600_flash_dma(struct i2c_client *client, + int flash_address, int flash_num_bytes, int cmt_seqz, + int table_number) +{ + int mailbox_address, mailbox_select; + int r = 0; + + /* check argument validity */ + if (flash_address > 0x1fffff) + return -ENXIO; + + if ((cmt_seqz > 1) || (cmt_seqz == 0 && table_number > 6) || + (cmt_seqz == 1 && table_number > 5)) + return -EINVAL; + + /* set mailbox parameters */ + if (cmt_seqz) { + mailbox_address = CMT_SPLASH_LUT_START_ADDR; + mailbox_select = CMT_SPLASH_LUT_DEST_SELECT; + } else { + mailbox_address = SEQ_RESET_LUT_START_ADDR; + mailbox_select = SEQ_RESET_LUT_DEST_SELECT; + } + + /* configure DMA from flash to LUT */ + r = picodlp_i2c_write(client, PBC_CONTROL, 0); + if (r) + return r; + + r = picodlp_i2c_write(client, FLASH_START_ADDR, flash_address); + if (r) + return r; + + r = picodlp_i2c_write(client, FLASH_READ_BYTES, flash_num_bytes); + if (r) + return r; + + r = picodlp_i2c_write(client, mailbox_address, 0); + if (r) + return r; + + r = picodlp_i2c_write(client, mailbox_select, table_number); + if (r) + return r; + + /* transfer control to flash controller */ + r = picodlp_i2c_write(client, PBC_CONTROL, 1); + if (r) + return r; + + /** + * wait for control transfer + * this usually takes close to 5ms + */ + msleep(5); + + /* return register access to i2c client */ + r = picodlp_i2c_write(client, PBC_CONTROL, 0); + if (r) + return r; + + /* close LUT access */ + r = picodlp_i2c_write(client, mailbox_select, 0); + if (r) + return r; + + return 0; +} + +/** + * picodlp_dpp2600_config_rgb: returns 0 on success and error code on failure + * Configure datapath for parallel RGB operation + * dpp2600 : digitally programmable potentiometer + * It is a system controller used for picodlp + * + * @client: i2c_client: i2c_client required for communication + * @return: + * 0 : Success, no error + * error code : Failure + */ +static int picodlp_dpp2600_config_rgb(struct i2c_client *client) +{ + int r = 0; + + static const struct picodlp_i2c_command config_commands[] = { + {SEQ_CONTROL, 0}, {ACTGEN_CONTROL, 0x10}, + {SEQUENCE_MODE, SEQ_LOCK}, {DATA_FORMAT, RGB888}, + {INPUT_RESOLUTION, WVGA_864_LANDSCAPE}, + {INPUT_SOURCE, PARALLEL_RGB}, {CPU_IF_SYNC_METHOD, 1}, + {SEQ_CONTROL, 1} + }; + + r = picodlp_i2c_write_array(client, config_commands, + ARRAY_SIZE(config_commands)); + return r; +} + +/** + * picodlp_dpp2600_config_splash returns 0 on success and + * error code in case of failure + * Configure datapath for splash image operation + * dpp2600 : digitally programmable potentiometer + * It is a system controller used for picodlp + * + * @return + * 0 - no errors + * -EINVAL - invalid image_number specified + */ +static int picodlp_dpp2600_config_splash(struct i2c_client *client) +{ + int r; + + static const struct picodlp_i2c_command splash_cmd[] = { + {SEQ_CONTROL, 0}, {SEQUENCE_MODE, SEQ_FREE_RUN}, + {DATA_FORMAT, RGB565}, {INPUT_RESOLUTION, QWVGA_LANDSCAPE}, + {INPUT_SOURCE, SPLASH_SCREEN} + }; + + r = picodlp_i2c_write_array(client, splash_cmd, + ARRAY_SIZE(splash_cmd)); + if (r) + return r; + + r = picodlp_dpp2600_flash_dma(client, SPLASH_1_START_ADDR, + SPLASH_1_SIZE, 1, SPLASH_LUT); + if (r) + return r; + + /* turn image back on */ + r = picodlp_i2c_write(client, SEQ_CONTROL, 1); + if (r) + return r; + + return 0; +} + +/** + * picodlp_i2c_init: i2c_initialization routine + * client: i2c_client for communication + * + * @return + * 0 : Success, no error + * error code : Failure + */ +static int picodlp_i2c_init(struct i2c_client *client) +{ + int r; + static const struct picodlp_i2c_command init_cmd_set1[] = { + {SOFT_RESET, 1}, {DMD_PARK_TRIGGER, 1}, + {MISC_REG, (PICO_MAJOR << 2 | PICO_MINOR)}, {SEQ_CONTROL, 0}, + {SEQ_VECTOR, 0x100}, {DMD_BLOCK_COUNT, 7}, + {DMD_VCC_CONTROL, 0x109}, {DMD_PARK_PULSE_COUNT, 0xA}, + {DMD_PARK_PULSE_WIDTH, 0xB}, {DMD_PARK_DELAY, 0x2ED}, + {DMD_SHADOW_ENABLE, 0}, {FLASH_OPCODE, 0xB}, + {FLASH_DUMMY_BYTES, 1}, {FLASH_ADDR_BYTES, 3}, + }; + + static const struct picodlp_i2c_command init_cmd_set2[] = { + {SDC_ENABLE, 1}, {AGC_CTRL, 7}, {CCA_C1A, 0x100}, + {CCA_C1B, 0x0}, {CCA_C1C, 0x0}, {CCA_C2A, 0x0}, + {CCA_C2B, 0x100}, {CCA_C2C, 0x0}, {CCA_C3A, 0x0}, + {CCA_C3B, 0x0}, {CCA_C3C, 0x100}, {CCA_C7A, 0x100}, + {CCA_C7B, 0x100}, {CCA_C7C, 0x100}, {CCA_ENABLE, 1}, + {CPU_IF_MODE, 1}, {SHORT_FLIP, 1}, {CURTAIN_CONTROL, 0}, + }; + + static const struct picodlp_i2c_command init_cmd_set3[] = { + {DMD_PARK_TRIGGER, 0}, {R_DRIVE_CURRENT, 0x298}, + {G_DRIVE_CURRENT, 0x298}, {B_DRIVE_CURRENT, 0x298}, + {RGB_DRIVER_ENABLE, 7}, + }; + + r = picodlp_i2c_write_array(client, init_cmd_set1, + ARRAY_SIZE(init_cmd_set1)); + if (r) + return r; + + /* configure DMA from flash to LUT */ + r = picodlp_dpp2600_flash_dma(client, CMT_LUT_0_START_ADDR, + CMT_LUT_0_SIZE, 1, CMT_LUT_ALL); + if (r) + return r; + + /* SEQ and DRC look-up tables */ + r = picodlp_dpp2600_flash_dma(client, SEQUENCE_0_START_ADDR, + SEQUENCE_0_SIZE, 0, SEQ_SEQ_LUT); + if (r) + return r; + + r = picodlp_dpp2600_flash_dma(client, DRC_TABLE_0_START_ADDR, + DRC_TABLE_0_SIZE, 0, SEQ_DRC_LUT_ALL); + if (r) + return r; + + r = picodlp_i2c_write_array(client, init_cmd_set2, + ARRAY_SIZE(init_cmd_set2)); + if (r) + return r; + + /* display logo splash image */ + r = picodlp_dpp2600_config_splash(client); + if (r) + return r; + + r = picodlp_i2c_write_array(client, init_cmd_set3, + ARRAY_SIZE(init_cmd_set3)); + if (r) + return r; + + r = picodlp_dpp2600_config_rgb(client); + if (r) + return r; + + return 0; +} + static int picodlp_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -134,6 +446,11 @@ static int picodlp_panel_power_on(struct omap_dss_device *dssdev) picodlp_i2c_data = i2c_get_clientdata(picod->picodlp_i2c_client); + msleep(700); /* sleep till panel is settled */ + r = picodlp_i2c_init(picod->picodlp_i2c_client); + if (r) + goto err; + return r; err: if (dssdev->platform_disable) -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
