/*
* Copyright © 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Shobhit Kumar <shobhit.kumar@intel.com>
*
*/
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/i915_drm.h>
#include <linux/slab.h>
#include <video/mipi_display.h>
#include <asm/intel-mid.h>
#include <video/mipi_display.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include "intel_dsi.h"
#include "intel_dsi_cmd.h"
#define MIPI_TRANSFER_MODE_SHIFT 0
#define MIPI_VIRTUAL_CHANNEL_SHIFT 1
#define MIPI_PORT_SHIFT 3
#define PREPARE_CNT_MAX 0x3F
#define EXIT_ZERO_CNT_MAX 0x3F
#define CLK_ZERO_CNT_MAX 0xFF
#define TRAIL_CNT_MAX 0x1F
#define NS_KHZ_RATIO 1000000
#define GPI0_NC_0_HV_DDI0_HPD 0x4130
#define GPIO_NC_0_HV_DDI0_PAD 0x4138
#define GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120
#define GPIO_NC_1_HV_DDI0_DDC_SDA_PAD 0x4128
#define GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110
#define GPIO_NC_2_HV_DDI0_DDC_SCL_PAD 0x4118
#define GPIO_NC_3_PANEL0_VDDEN 0x4140
#define GPIO_NC_3_PANEL0_VDDEN_PAD 0x4148
#define GPIO_NC_4_PANEL0_BLKEN 0x4150
#define GPIO_NC_4_PANEL0_BLKEN_PAD 0x4158
#define GPIO_NC_5_PANEL0_BLKCTL 0x4160
#define GPIO_NC_5_PANEL0_BLKCTL_PAD 0x4168
#define GPIO_NC_6_PCONF0 0x4180
#define GPIO_NC_6_PAD 0x4188
#define GPIO_NC_7_PCONF0 0x4190
#define GPIO_NC_7_PAD 0x4198
#define GPIO_NC_8_PCONF0 0x4170
#define GPIO_NC_8_PAD 0x4178
#define GPIO_NC_9_PCONF0 0x4100
#define GPIO_NC_9_PAD 0x4108
#define GPIO_NC_10_PCONF0 0x40E0
#define GPIO_NC_10_PAD 0x40E8
#define GPIO_NC_11_PCONF0 0x40F0
#define GPIO_NC_11_PAD 0x40F8
struct gpio_table {
u16 function_reg;
u16 pad_reg;
u8 init;
};
static struct gpio_table gtable[] = {
{ GPI0_NC_0_HV_DDI0_HPD, GPIO_NC_0_HV_DDI0_PAD, 0 },
{ GPIO_NC_1_HV_DDI0_DDC_SDA, GPIO_NC_1_HV_DDI0_DDC_SDA_PAD, 0 },
{ GPIO_NC_2_HV_DDI0_DDC_SCL, GPIO_NC_2_HV_DDI0_DDC_SCL_PAD, 0 },
{ GPIO_NC_3_PANEL0_VDDEN, GPIO_NC_3_PANEL0_VDDEN_PAD, 0 },
{ GPIO_NC_4_PANEL0_BLKEN, GPIO_NC_4_PANEL0_BLKEN_PAD, 0 },
{ GPIO_NC_5_PANEL0_BLKCTL, GPIO_NC_5_PANEL0_BLKCTL_PAD, 0 },
{ GPIO_NC_6_PCONF0, GPIO_NC_6_PAD, 0 },
{ GPIO_NC_7_PCONF0, GPIO_NC_7_PAD, 0 },
{ GPIO_NC_8_PCONF0, GPIO_NC_8_PAD, 0 },
{ GPIO_NC_9_PCONF0, GPIO_NC_9_PAD, 0 },
{ GPIO_NC_10_PCONF0, GPIO_NC_10_PAD, 0},
{ GPIO_NC_11_PCONF0, GPIO_NC_11_PAD, 0}
};
static u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, u8 *data)
{
u8 type, byte, mode, vc, port;
u16 len;
byte = *data++;
mode = (byte >> MIPI_TRANSFER_MODE_SHIFT) & 0x1;
vc = (byte >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 0x3;
port = (byte >> MIPI_PORT_SHIFT) & 0x3;
/* LP or HS mode */
intel_dsi->hs = mode;
/* get packet type and increment the pointer */
type = *data++;
len = *((u16 *) data);
data += 2;
switch (type) {
case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
dsi_vc_generic_write_0(intel_dsi, vc);
break;
case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
dsi_vc_generic_write_1(intel_dsi, vc, *data);
break;
case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
dsi_vc_generic_write_2(intel_dsi, vc, *data, *(data + 1));
break;
case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
break;
case MIPI_DSI_GENERIC_LONG_WRITE:
dsi_vc_generic_write(intel_dsi, vc, data, len);
break;
case MIPI_DSI_DCS_SHORT_WRITE:
dsi_vc_dcs_write_0(intel_dsi, vc, *data);
break;
case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
dsi_vc_dcs_write_1(intel_dsi, vc, *data, *(data + 1));
break;
case MIPI_DSI_DCS_READ:
DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
break;
case MIPI_DSI_DCS_LONG_WRITE:
dsi_vc_dcs_write(intel_dsi, vc, data, len);
break;
}
data += len;
return data;
}
static u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, u8 *data)
{
u32 delay = *((u32 *) data);
usleep_range(delay, delay + 10);
data += 4;
return data;
}
static u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, u8 *data)
{
u8 gpio, action;
u16 function, pad;
u32 val;
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
gpio = *data++;
/* pull up/down */
action = *data++;
function = gtable[gpio].function_reg;
pad = gtable[gpio].pad_reg;
mutex_lock(&dev_priv->dpio_lock);
if (!gtable[gpio].init) {
/* program the function */
/* FIXME: remove constant below */
vlv_gpio_nc_write(dev_priv, function, 0x2000CC00);
gtable[gpio].init = 1;
}
val = 0x4 | action;
/* pull up/down */
vlv_gpio_nc_write(dev_priv, pad, val);
mutex_unlock(&dev_priv->dpio_lock);
return data;
}
typedef u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi, u8 *data);
static const fn_mipi_elem_exec exec_elem[] = {
NULL, /* reserved */
mipi_exec_send_packet,
mipi_exec_delay,
mipi_exec_gpio,
NULL, /* status read; later */
};
/*
* MIPI Sequence from VBT #53 parsing logic
* We have already separated each seqence during bios parsing
* Following is generic execution function for any sequence
*/
static const char * const seq_name[] = {
"UNDEFINED",
"MIPI_SEQ_ASSERT_RESET",
"MIPI_SEQ_INIT_OTP",
"MIPI_SEQ_DISPLAY_ON",
"MIPI_SEQ_DISPLAY_OFF",
"MIPI_SEQ_DEASSERT_RESET"
};
static void generic_exec_sequence(struct intel_dsi *intel_dsi, char *sequence)
{
u8 *data = sequence;
fn_mipi_elem_exec mipi_elem_exec;
int index;
if (!sequence)
return;
DRM_DEBUG_DRIVER("Starting MIPI sequence - %s\n", seq_name[*data]);
/* go to the first element of the sequence */
data++;
/* parse each byte till we reach end of sequence byte - 0x00 */
while (1) {
index = *data;
mipi_elem_exec = exec_elem[index];
if (!mipi_elem_exec) {
DRM_ERROR("Unsupported MIPI element, skipping sequence execution\n");
return;
}
/* goto element payload */
data++;
/* execute the element specific rotines */
data = mipi_elem_exec(intel_dsi, data);
/*
* After processing the element, data should point to
* next element or end of sequence
* check if have we reached end of sequence
*/
if (*data == 0x00)
break;
}
}
static bool generic_init(struct intel_dsi_device *dsi)
{
struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps;
struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode;
u32 bits_per_pixel = 24;
u32 tlpx_ns, extra_byte_count, bitrate, tlpx_ui;
u32 ui_num, ui_den;
u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
u32 ths_prepare_ns, tclk_trail_ns;
u32 tclk_prepare_clkzero, ths_prepare_hszero;
u32 lp_to_hs_switch, hs_to_lp_switch;
DRM_DEBUG_KMS("\n");
intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1;
intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0;
intel_dsi->lane_count = mipi_config->lane_cnt + 1;
intel_dsi->pixel_format = mipi_config->videomode_color_format << 7;
if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB666)
bits_per_pixel = 18;
else if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB565)
bits_per_pixel = 16;
bitrate = (mode->clock * bits_per_pixel) / intel_dsi->lane_count;
intel_dsi->operation_mode = mipi_config->is_cmd_mode;
intel_dsi->video_mode_format = mipi_config->video_transfer_mode;
intel_dsi->escape_clk_div = mipi_config->byte_clk_sel;
intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout;
intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout;
intel_dsi->rst_timer_val = mipi_config->device_reset_timer;
intel_dsi->init_count = mipi_config->master_init_timer;
intel_dsi->bw_timer = mipi_config->dbi_bw_timer;
intel_dsi->video_frmt_cfg_bits =
mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0;
switch (intel_dsi->escape_clk_div) {
case 0:
tlpx_ns = 50;
break;
case 1:
tlpx_ns = 100;
break;
case 2:
tlpx_ns = 200;
break;
default:
tlpx_ns = 50;
break;
}
switch (intel_dsi->lane_count) {
case 1:
case 2:
extra_byte_count = 2;
break;
case 3:
extra_byte_count = 4;
break;
case 4:
default:
extra_byte_count = 3;
break;
}
/*
* ui(s) = 1/f [f in hz]
* ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz)
*/
/* in Kbps */
ui_num = NS_KHZ_RATIO;
ui_den = bitrate;
tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
ths_prepare_hszero = mipi_config->ths_prepare_hszero;
/*
* B060
* LP byte clock = TLPX/ (8UI)
*/
intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
/* count values in UI = (ns value) * (bitrate / (2 * 10^6))
*
* Since txddrclkhs_i is 2xUI, all the count values programmed in
* DPHY param register are divided by 2
*
* prepare count
*/
ths_prepare_ns = max(mipi_config->ths_prepare,
mipi_config->tclk_prepare);
prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * 2);
/* exit zero count */
exit_zero_cnt = DIV_ROUND_UP(
(ths_prepare_hszero - ths_prepare_ns) * ui_den,
ui_num * 2
);
/*
* Exit zero is unified val ths_zero and ths_exit
* minimum value for ths_exit = 110ns
* min (exit_zero_cnt * 2) = 110/UI
* exit_zero_cnt = 55/UI
*/
if (exit_zero_cnt < (55 * ui_den / ui_num))
if ((55 * ui_den) % ui_num)
exit_zero_cnt += 1;
/* clk zero count */
clk_zero_cnt = DIV_ROUND_UP(
(tclk_prepare_clkzero - ths_prepare_ns)
* ui_den, 2 * ui_num);
/* trail count */
tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, 2 * ui_num);
if (prepare_cnt > PREPARE_CNT_MAX ||
exit_zero_cnt > EXIT_ZERO_CNT_MAX ||
clk_zero_cnt > CLK_ZERO_CNT_MAX ||
trail_cnt > TRAIL_CNT_MAX)
DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");
if (prepare_cnt > PREPARE_CNT_MAX)
prepare_cnt = PREPARE_CNT_MAX;
if (exit_zero_cnt > EXIT_ZERO_CNT_MAX)
exit_zero_cnt = EXIT_ZERO_CNT_MAX;
if (clk_zero_cnt > CLK_ZERO_CNT_MAX)
clk_zero_cnt = CLK_ZERO_CNT_MAX;
if (trail_cnt > TRAIL_CNT_MAX)
trail_cnt = TRAIL_CNT_MAX;
/* B080 */
intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
clk_zero_cnt << 8 | prepare_cnt;
/*
* LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2
* + 10UI + Extra Byte Count
*
* HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
* Extra Byte Count is calculated according to number of lanes.
* High Low Switch Count is the Max of LP to HS and
* HS to LP switch count
*
*/
tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
/* B044 */
/* FIXME:
* The comment above does not match with the code */
lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * 2 +
exit_zero_cnt * 2 + 10, 8);
hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
intel_dsi->hs_to_lp_count += extra_byte_count;
/* B088 */
/* LP -> HS for clock lanes
* LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
* extra byte count
* 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
* 2(in UI) + extra byte count
* In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
* 8 + extra byte count
*/
intel_dsi->clk_lp_to_hs_count =
DIV_ROUND_UP(
4 * tlpx_ui + prepare_cnt * 2 +
clk_zero_cnt * 2,
8);
intel_dsi->clk_lp_to_hs_count += extra_byte_count;
/* HS->LP for Clock Lanes
* Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
* Extra byte count
* 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
* In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
* Extra byte count
*/
intel_dsi->clk_hs_to_lp_count =
DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
8);
intel_dsi->clk_hs_to_lp_count += extra_byte_count;
DRM_DEBUG_KMS("Eot %s\n", intel_dsi->eotp_pkt ? "enabled" : "disabled");
DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi->clock_stop ?
"disabled" : "enabled");
DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format);
DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div);
DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout);
DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val);
DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count);
DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count);
DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk);
DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer);
DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count);
DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count);
DRM_DEBUG_KMS("BTA %s\n",
intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA ?
"disabled" : "enabled");
/* delays in VBT are in unit of 100us, so need to convert
* here in ms
* Delay (100us) * 100 /1000 = Delay / 10 (ms) */
intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10;
intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10;
intel_dsi->panel_on_delay = pps->panel_on_delay / 10;
intel_dsi->panel_off_delay = pps->panel_off_delay / 10;
intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10;
return true;
}
static int generic_mode_valid(struct intel_dsi_device *dsi,
struct drm_display_mode *mode)
{
return MODE_OK;
}
static bool generic_mode_fixup(struct intel_dsi_device *dsi,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode) {
return true;
}
static void generic_panel_reset(struct intel_dsi_device *dsi)
{
struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET];
generic_exec_sequence(intel_dsi, sequence);
}
static void generic_disable_panel_power(struct intel_dsi_device *dsi)
{
struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET];
generic_exec_sequence(intel_dsi, sequence);
}
static void generic_send_otp_cmds(struct intel_dsi_device *dsi)
{
struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
generic_exec_sequence(intel_dsi, sequence);
}
static void generic_enable(struct intel_dsi_device *dsi)
{
struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_ON];
generic_exec_sequence(intel_dsi, sequence);
}
static void generic_disable(struct intel_dsi_device *dsi)
{
struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_OFF];
generic_exec_sequence(intel_dsi, sequence);
}
static enum drm_connector_status generic_detect(struct intel_dsi_device *dsi)
{
return connector_status_connected;
}
static bool generic_get_hw_state(struct intel_dsi_device *dev)
{
return true;
}
static struct drm_display_mode *generic_get_modes(struct intel_dsi_device *dsi)
{
struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
dev_priv->vbt.lfp_lvds_vbt_mode->type |= DRM_MODE_TYPE_PREFERRED;
return dev_priv->vbt.lfp_lvds_vbt_mode;
}
static void generic_destroy(struct intel_dsi_device *dsi) { }
/* Callbacks. We might not need them all. */
struct intel_dsi_dev_ops vbt_generic_dsi_display_ops = {
.init = generic_init,
.mode_valid = generic_mode_valid,
.mode_fixup = generic_mode_fixup,
.panel_reset = generic_panel_reset,
.disable_panel_power = generic_disable_panel_power,
.send_otp_cmds = generic_send_otp_cmds,
.enable = generic_enable,
.disable = generic_disable,
.detect = generic_detect,
.get_hw_state = generic_get_hw_state,
.get_modes = generic_get_modes,
.destroy = generic_destroy,
};
