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linux/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c

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/*
* 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 <drm/drm_panel.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"
struct vbt_panel {
struct drm_panel panel;
struct intel_dsi *intel_dsi;
};
static inline struct vbt_panel *to_vbt_panel(struct drm_panel *panel)
{
return container_of(panel, struct vbt_panel, panel);
}
#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 inline enum port intel_dsi_seq_port_to_port(u8 port)
{
return port ? PORT_C : PORT_A;
}
static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi,
const u8 *data)
{
struct mipi_dsi_device *dsi_device;
u8 type, flags, seq_port;
u16 len;
enum port port;
flags = *data++;
type = *data++;
len = *((u16 *) data);
data += 2;
seq_port = (flags >> MIPI_PORT_SHIFT) & 3;
/* For DSI single link on Port A & C, the seq_port value which is
* parsed from Sequence Block#53 of VBT has been set to 0
* Now, read/write of packets for the DSI single link on Port A and
* Port C will based on the DVO port from VBT block 2.
*/
if (intel_dsi->ports == (1 << PORT_C))
port = PORT_C;
else
port = intel_dsi_seq_port_to_port(seq_port);
dsi_device = intel_dsi->dsi_hosts[port]->device;
if (!dsi_device) {
DRM_DEBUG_KMS("no dsi device for port %c\n", port_name(port));
goto out;
}
if ((flags >> MIPI_TRANSFER_MODE_SHIFT) & 1)
dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM;
else
dsi_device->mode_flags |= MIPI_DSI_MODE_LPM;
dsi_device->channel = (flags >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 3;
switch (type) {
case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
mipi_dsi_generic_write(dsi_device, NULL, 0);
break;
case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
mipi_dsi_generic_write(dsi_device, data, 1);
break;
case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
mipi_dsi_generic_write(dsi_device, data, 2);
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:
mipi_dsi_generic_write(dsi_device, data, len);
break;
case MIPI_DSI_DCS_SHORT_WRITE:
mipi_dsi_dcs_write_buffer(dsi_device, data, 1);
break;
case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
mipi_dsi_dcs_write_buffer(dsi_device, data, 2);
break;
case MIPI_DSI_DCS_READ:
DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
break;
case MIPI_DSI_DCS_LONG_WRITE:
mipi_dsi_dcs_write_buffer(dsi_device, data, len);
break;
}
out:
data += len;
return data;
}
static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
{
u32 delay = *((const u32 *) data);
usleep_range(delay, delay + 10);
data += 4;
return data;
}
static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const 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;
if (dev_priv->vbt.dsi.seq_version >= 3)
data++;
gpio = *data++;
/* pull up/down */
action = *data++ & 1;
if (gpio >= ARRAY_SIZE(gtable)) {
DRM_DEBUG_KMS("unknown gpio %u\n", gpio);
goto out;
}
if (!IS_VALLEYVIEW(dev_priv)) {
DRM_DEBUG_KMS("GPIO element not supported on this platform\n");
goto out;
}
if (dev_priv->vbt.dsi.seq_version >= 3) {
DRM_DEBUG_KMS("GPIO element v3 not supported\n");
goto out;
}
function = gtable[gpio].function_reg;
pad = gtable[gpio].pad_reg;
mutex_lock(&dev_priv->sb_lock);
if (!gtable[gpio].init) {
/* program the function */
/* FIXME: remove constant below */
vlv_iosf_sb_write(dev_priv, IOSF_PORT_GPIO_NC, function,
0x2000CC00);
gtable[gpio].init = 1;
}
val = 0x4 | action;
/* pull up/down */
vlv_iosf_sb_write(dev_priv, IOSF_PORT_GPIO_NC, pad, val);
mutex_unlock(&dev_priv->sb_lock);
out:
return data;
}
static const u8 *mipi_exec_i2c_skip(struct intel_dsi *intel_dsi, const u8 *data)
{
return data + *(data + 6) + 7;
}
typedef const u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi,
const u8 *data);
static const fn_mipi_elem_exec exec_elem[] = {
[MIPI_SEQ_ELEM_SEND_PKT] = mipi_exec_send_packet,
[MIPI_SEQ_ELEM_DELAY] = mipi_exec_delay,
[MIPI_SEQ_ELEM_GPIO] = mipi_exec_gpio,
[MIPI_SEQ_ELEM_I2C] = mipi_exec_i2c_skip,
};
/*
* 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[] = {
[MIPI_SEQ_ASSERT_RESET] = "MIPI_SEQ_ASSERT_RESET",
[MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP",
[MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON",
[MIPI_SEQ_DISPLAY_OFF] = "MIPI_SEQ_DISPLAY_OFF",
[MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET",
[MIPI_SEQ_BACKLIGHT_ON] = "MIPI_SEQ_BACKLIGHT_ON",
[MIPI_SEQ_BACKLIGHT_OFF] = "MIPI_SEQ_BACKLIGHT_OFF",
[MIPI_SEQ_TEAR_ON] = "MIPI_SEQ_TEAR_ON",
[MIPI_SEQ_TEAR_OFF] = "MIPI_SEQ_TEAR_OFF",
[MIPI_SEQ_POWER_ON] = "MIPI_SEQ_POWER_ON",
[MIPI_SEQ_POWER_OFF] = "MIPI_SEQ_POWER_OFF",
};
static const char *sequence_name(enum mipi_seq seq_id)
{
if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id])
return seq_name[seq_id];
else
return "(unknown)";
}
static void generic_exec_sequence(struct drm_panel *panel, enum mipi_seq seq_id)
{
struct vbt_panel *vbt_panel = to_vbt_panel(panel);
struct intel_dsi *intel_dsi = vbt_panel->intel_dsi;
struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
const u8 *data;
fn_mipi_elem_exec mipi_elem_exec;
if (WARN_ON(seq_id >= ARRAY_SIZE(dev_priv->vbt.dsi.sequence)))
return;
data = dev_priv->vbt.dsi.sequence[seq_id];
if (!data) {
DRM_DEBUG_KMS("MIPI sequence %d - %s not available\n",
seq_id, sequence_name(seq_id));
return;
}
WARN_ON(*data != seq_id);
DRM_DEBUG_KMS("Starting MIPI sequence %d - %s\n",
seq_id, sequence_name(seq_id));
/* Skip Sequence Byte. */
data++;
/* Skip Size of Sequence. */
if (dev_priv->vbt.dsi.seq_version >= 3)
data += 4;
while (1) {
u8 operation_byte = *data++;
u8 operation_size = 0;
if (operation_byte == MIPI_SEQ_ELEM_END)
break;
if (operation_byte < ARRAY_SIZE(exec_elem))
mipi_elem_exec = exec_elem[operation_byte];
else
mipi_elem_exec = NULL;
/* Size of Operation. */
if (dev_priv->vbt.dsi.seq_version >= 3)
operation_size = *data++;
if (mipi_elem_exec) {
data = mipi_elem_exec(intel_dsi, data);
} else if (operation_size) {
/* We have size, skip. */
DRM_DEBUG_KMS("Unsupported MIPI operation byte %u\n",
operation_byte);
data += operation_size;
} else {
/* No size, can't skip without parsing. */
DRM_ERROR("Unsupported MIPI operation byte %u\n",
operation_byte);
return;
}
}
}
static int vbt_panel_prepare(struct drm_panel *panel)
{
generic_exec_sequence(panel, MIPI_SEQ_ASSERT_RESET);
generic_exec_sequence(panel, MIPI_SEQ_INIT_OTP);
return 0;
}
static int vbt_panel_unprepare(struct drm_panel *panel)
{
generic_exec_sequence(panel, MIPI_SEQ_DEASSERT_RESET);
return 0;
}
static int vbt_panel_enable(struct drm_panel *panel)
{
generic_exec_sequence(panel, MIPI_SEQ_DISPLAY_ON);
return 0;
}
static int vbt_panel_disable(struct drm_panel *panel)
{
generic_exec_sequence(panel, MIPI_SEQ_DISPLAY_OFF);
return 0;
}
static int vbt_panel_get_modes(struct drm_panel *panel)
{
struct vbt_panel *vbt_panel = to_vbt_panel(panel);
struct intel_dsi *intel_dsi = vbt_panel->intel_dsi;
struct drm_device *dev = intel_dsi->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_display_mode *mode;
if (!panel->connector)
return 0;
mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
if (!mode)
return 0;
mode->type |= DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(panel->connector, mode);
return 1;
}
static const struct drm_panel_funcs vbt_panel_funcs = {
.disable = vbt_panel_disable,
.unprepare = vbt_panel_unprepare,
.prepare = vbt_panel_prepare,
.enable = vbt_panel_enable,
.get_modes = vbt_panel_get_modes,
};
/* XXX: This should be done when parsing the VBT in intel_bios.c */
static enum mipi_dsi_pixel_format pixel_format_from_vbt(u32 fmt)
{
/* It just so happens the VBT matches register contents. */
switch (fmt) {
case VID_MODE_FORMAT_RGB888:
return MIPI_DSI_FMT_RGB888;
case VID_MODE_FORMAT_RGB666:
return MIPI_DSI_FMT_RGB666;
case VID_MODE_FORMAT_RGB666_PACKED:
return MIPI_DSI_FMT_RGB666_PACKED;
case VID_MODE_FORMAT_RGB565:
return MIPI_DSI_FMT_RGB565;
default:
MISSING_CASE(fmt);
return MIPI_DSI_FMT_RGB666;
}
}
struct drm_panel *vbt_panel_init(struct intel_dsi *intel_dsi, u16 panel_id)
{
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;
struct vbt_panel *vbt_panel;
u32 bpp;
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;
u32 pclk, computed_ddr;
u16 burst_mode_ratio;
enum port port;
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 = pixel_format_from_vbt(mipi_config->videomode_color_format << 7);
bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
intel_dsi->dual_link = mipi_config->dual_link;
intel_dsi->pixel_overlap = mipi_config->pixel_overlap;
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;
pclk = mode->clock;
/* In dual link mode each port needs half of pixel clock */
if (intel_dsi->dual_link) {
pclk = pclk / 2;
/* we can enable pixel_overlap if needed by panel. In this
* case we need to increase the pixelclock for extra pixels
*/
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
pclk += DIV_ROUND_UP(mode->vtotal *
intel_dsi->pixel_overlap *
60, 1000);
}
}
/* Burst Mode Ratio
* Target ddr frequency from VBT / non burst ddr freq
* multiply by 100 to preserve remainder
*/
if (intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
if (mipi_config->target_burst_mode_freq) {
computed_ddr = (pclk * bpp) / intel_dsi->lane_count;
if (mipi_config->target_burst_mode_freq <
computed_ddr) {
DRM_ERROR("Burst mode freq is less than computed\n");
return NULL;
}
burst_mode_ratio = DIV_ROUND_UP(
mipi_config->target_burst_mode_freq * 100,
computed_ddr);
pclk = DIV_ROUND_UP(pclk * burst_mode_ratio, 100);
} else {
DRM_ERROR("Burst mode target is not set\n");
return NULL;
}
} else
burst_mode_ratio = 100;
intel_dsi->burst_mode_ratio = burst_mode_ratio;
intel_dsi->pclk = pclk;
bitrate = (pclk * bpp) / intel_dsi->lane_count;
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");
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_FRONT_BACK\n");
else if (intel_dsi->dual_link == DSI_DUAL_LINK_PIXEL_ALT)
DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_PIXEL_ALT\n");
else
DRM_DEBUG_KMS("Dual link: NONE\n");
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;
/* This is cheating a bit with the cleanup. */
vbt_panel = devm_kzalloc(dev->dev, sizeof(*vbt_panel), GFP_KERNEL);
if (!vbt_panel)
return NULL;
vbt_panel->intel_dsi = intel_dsi;
drm_panel_init(&vbt_panel->panel);
vbt_panel->panel.funcs = &vbt_panel_funcs;
drm_panel_add(&vbt_panel->panel);
/* a regular driver would get the device in probe */
for_each_dsi_port(port, intel_dsi->ports) {
mipi_dsi_attach(intel_dsi->dsi_hosts[port]->device);
}
return &vbt_panel->panel;
}
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