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linux/drivers/video/sh_mobile_hdmi.c
Bruno Prémont 4a47a0e09c fb: sh-mobile: Fix deadlock risk between lock_fb_info() and console_lock() 
Following on Herton's patch "fb: avoid possible deadlock caused by
fb_set_suspend" which moves lock_fb_info() out of fb_set_suspend()
to its callers, correct sh-mobile's locking around call to
fb_set_suspend() and the same sort of deaklocks with console_lock()
due to order of taking the lock.

console_lock() must be taken while fb_info is already locked and fb_info
must be locked while calling fb_set_suspend().

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: stable@kernel.org
2011-09-02 18:21:21 +00:00

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/*
* SH-Mobile High-Definition Multimedia Interface (HDMI) driver
* for SLISHDMI13T and SLIPHDMIT IP cores
*
* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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/console.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <video/sh_mobile_hdmi.h>
#include <video/sh_mobile_lcdc.h>
#include "sh_mobile_lcdcfb.h"
#define HDMI_SYSTEM_CTRL 0x00 /* System control */
#define HDMI_L_R_DATA_SWAP_CTRL_RPKT 0x01 /* L/R data swap control,
bits 19..16 of 20-bit N for Audio Clock Regeneration packet */
#define HDMI_20_BIT_N_FOR_AUDIO_RPKT_15_8 0x02 /* bits 15..8 of 20-bit N for Audio Clock Regeneration packet */
#define HDMI_20_BIT_N_FOR_AUDIO_RPKT_7_0 0x03 /* bits 7..0 of 20-bit N for Audio Clock Regeneration packet */
#define HDMI_SPDIF_AUDIO_SAMP_FREQ_CTS 0x04 /* SPDIF audio sampling frequency,
bits 19..16 of Internal CTS */
#define HDMI_INTERNAL_CTS_15_8 0x05 /* bits 15..8 of Internal CTS */
#define HDMI_INTERNAL_CTS_7_0 0x06 /* bits 7..0 of Internal CTS */
#define HDMI_EXTERNAL_CTS_19_16 0x07 /* External CTS */
#define HDMI_EXTERNAL_CTS_15_8 0x08 /* External CTS */
#define HDMI_EXTERNAL_CTS_7_0 0x09 /* External CTS */
#define HDMI_AUDIO_SETTING_1 0x0A /* Audio setting.1 */
#define HDMI_AUDIO_SETTING_2 0x0B /* Audio setting.2 */
#define HDMI_I2S_AUDIO_SET 0x0C /* I2S audio setting */
#define HDMI_DSD_AUDIO_SET 0x0D /* DSD audio setting */
#define HDMI_DEBUG_MONITOR_1 0x0E /* Debug monitor.1 */
#define HDMI_DEBUG_MONITOR_2 0x0F /* Debug monitor.2 */
#define HDMI_I2S_INPUT_PIN_SWAP 0x10 /* I2S input pin swap */
#define HDMI_AUDIO_STATUS_BITS_SETTING_1 0x11 /* Audio status bits setting.1 */
#define HDMI_AUDIO_STATUS_BITS_SETTING_2 0x12 /* Audio status bits setting.2 */
#define HDMI_CATEGORY_CODE 0x13 /* Category code */
#define HDMI_SOURCE_NUM_AUDIO_WORD_LEN 0x14 /* Source number/Audio word length */
#define HDMI_AUDIO_VIDEO_SETTING_1 0x15 /* Audio/Video setting.1 */
#define HDMI_VIDEO_SETTING_1 0x16 /* Video setting.1 */
#define HDMI_DEEP_COLOR_MODES 0x17 /* Deep Color Modes */
/* 12 16- and 10-bit Color space conversion parameters: 0x18..0x2f */
#define HDMI_COLOR_SPACE_CONVERSION_PARAMETERS 0x18
#define HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS 0x30 /* External video parameter settings */
#define HDMI_EXTERNAL_H_TOTAL_7_0 0x31 /* External horizontal total (LSB) */
#define HDMI_EXTERNAL_H_TOTAL_11_8 0x32 /* External horizontal total (MSB) */
#define HDMI_EXTERNAL_H_BLANK_7_0 0x33 /* External horizontal blank (LSB) */
#define HDMI_EXTERNAL_H_BLANK_9_8 0x34 /* External horizontal blank (MSB) */
#define HDMI_EXTERNAL_H_DELAY_7_0 0x35 /* External horizontal delay (LSB) */
#define HDMI_EXTERNAL_H_DELAY_9_8 0x36 /* External horizontal delay (MSB) */
#define HDMI_EXTERNAL_H_DURATION_7_0 0x37 /* External horizontal duration (LSB) */
#define HDMI_EXTERNAL_H_DURATION_9_8 0x38 /* External horizontal duration (MSB) */
#define HDMI_EXTERNAL_V_TOTAL_7_0 0x39 /* External vertical total (LSB) */
#define HDMI_EXTERNAL_V_TOTAL_9_8 0x3A /* External vertical total (MSB) */
#define HDMI_AUDIO_VIDEO_SETTING_2 0x3B /* Audio/Video setting.2 */
#define HDMI_EXTERNAL_V_BLANK 0x3D /* External vertical blank */
#define HDMI_EXTERNAL_V_DELAY 0x3E /* External vertical delay */
#define HDMI_EXTERNAL_V_DURATION 0x3F /* External vertical duration */
#define HDMI_CTRL_PKT_MANUAL_SEND_CONTROL 0x40 /* Control packet manual send control */
#define HDMI_CTRL_PKT_AUTO_SEND 0x41 /* Control packet auto send with VSYNC control */
#define HDMI_AUTO_CHECKSUM_OPTION 0x42 /* Auto checksum option */
#define HDMI_VIDEO_SETTING_2 0x45 /* Video setting.2 */
#define HDMI_OUTPUT_OPTION 0x46 /* Output option */
#define HDMI_SLIPHDMIT_PARAM_OPTION 0x51 /* SLIPHDMIT parameter option */
#define HDMI_HSYNC_PMENT_AT_EMB_7_0 0x52 /* HSYNC placement at embedded sync (LSB) */
#define HDMI_HSYNC_PMENT_AT_EMB_15_8 0x53 /* HSYNC placement at embedded sync (MSB) */
#define HDMI_VSYNC_PMENT_AT_EMB_7_0 0x54 /* VSYNC placement at embedded sync (LSB) */
#define HDMI_VSYNC_PMENT_AT_EMB_14_8 0x55 /* VSYNC placement at embedded sync (MSB) */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_1 0x56 /* SLIPHDMIT parameter settings.1 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_2 0x57 /* SLIPHDMIT parameter settings.2 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_3 0x58 /* SLIPHDMIT parameter settings.3 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_5 0x59 /* SLIPHDMIT parameter settings.5 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_6 0x5A /* SLIPHDMIT parameter settings.6 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_7 0x5B /* SLIPHDMIT parameter settings.7 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_8 0x5C /* SLIPHDMIT parameter settings.8 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_9 0x5D /* SLIPHDMIT parameter settings.9 */
#define HDMI_SLIPHDMIT_PARAM_SETTINGS_10 0x5E /* SLIPHDMIT parameter settings.10 */
#define HDMI_CTRL_PKT_BUF_INDEX 0x5F /* Control packet buffer index */
#define HDMI_CTRL_PKT_BUF_ACCESS_HB0 0x60 /* Control packet data buffer access window - HB0 */
#define HDMI_CTRL_PKT_BUF_ACCESS_HB1 0x61 /* Control packet data buffer access window - HB1 */
#define HDMI_CTRL_PKT_BUF_ACCESS_HB2 0x62 /* Control packet data buffer access window - HB2 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB0 0x63 /* Control packet data buffer access window - PB0 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB1 0x64 /* Control packet data buffer access window - PB1 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB2 0x65 /* Control packet data buffer access window - PB2 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB3 0x66 /* Control packet data buffer access window - PB3 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB4 0x67 /* Control packet data buffer access window - PB4 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB5 0x68 /* Control packet data buffer access window - PB5 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB6 0x69 /* Control packet data buffer access window - PB6 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB7 0x6A /* Control packet data buffer access window - PB7 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB8 0x6B /* Control packet data buffer access window - PB8 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB9 0x6C /* Control packet data buffer access window - PB9 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB10 0x6D /* Control packet data buffer access window - PB10 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB11 0x6E /* Control packet data buffer access window - PB11 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB12 0x6F /* Control packet data buffer access window - PB12 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB13 0x70 /* Control packet data buffer access window - PB13 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB14 0x71 /* Control packet data buffer access window - PB14 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB15 0x72 /* Control packet data buffer access window - PB15 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB16 0x73 /* Control packet data buffer access window - PB16 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB17 0x74 /* Control packet data buffer access window - PB17 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB18 0x75 /* Control packet data buffer access window - PB18 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB19 0x76 /* Control packet data buffer access window - PB19 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB20 0x77 /* Control packet data buffer access window - PB20 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB21 0x78 /* Control packet data buffer access window - PB21 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB22 0x79 /* Control packet data buffer access window - PB22 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB23 0x7A /* Control packet data buffer access window - PB23 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB24 0x7B /* Control packet data buffer access window - PB24 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB25 0x7C /* Control packet data buffer access window - PB25 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB26 0x7D /* Control packet data buffer access window - PB26 */
#define HDMI_CTRL_PKT_BUF_ACCESS_PB27 0x7E /* Control packet data buffer access window - PB27 */
#define HDMI_EDID_KSV_FIFO_ACCESS_WINDOW 0x80 /* EDID/KSV FIFO access window */
#define HDMI_DDC_BUS_ACCESS_FREQ_CTRL_7_0 0x81 /* DDC bus access frequency control (LSB) */
#define HDMI_DDC_BUS_ACCESS_FREQ_CTRL_15_8 0x82 /* DDC bus access frequency control (MSB) */
#define HDMI_INTERRUPT_MASK_1 0x92 /* Interrupt mask.1 */
#define HDMI_INTERRUPT_MASK_2 0x93 /* Interrupt mask.2 */
#define HDMI_INTERRUPT_STATUS_1 0x94 /* Interrupt status.1 */
#define HDMI_INTERRUPT_STATUS_2 0x95 /* Interrupt status.2 */
#define HDMI_INTERRUPT_MASK_3 0x96 /* Interrupt mask.3 */
#define HDMI_INTERRUPT_MASK_4 0x97 /* Interrupt mask.4 */
#define HDMI_INTERRUPT_STATUS_3 0x98 /* Interrupt status.3 */
#define HDMI_INTERRUPT_STATUS_4 0x99 /* Interrupt status.4 */
#define HDMI_SOFTWARE_HDCP_CONTROL_1 0x9A /* Software HDCP control.1 */
#define HDMI_FRAME_COUNTER 0x9C /* Frame counter */
#define HDMI_FRAME_COUNTER_FOR_RI_CHECK 0x9D /* Frame counter for Ri check */
#define HDMI_HDCP_CONTROL 0xAF /* HDCP control */
#define HDMI_RI_FRAME_COUNT_REGISTER 0xB2 /* Ri frame count register */
#define HDMI_DDC_BUS_CONTROL 0xB7 /* DDC bus control */
#define HDMI_HDCP_STATUS 0xB8 /* HDCP status */
#define HDMI_SHA0 0xB9 /* sha0 */
#define HDMI_SHA1 0xBA /* sha1 */
#define HDMI_SHA2 0xBB /* sha2 */
#define HDMI_SHA3 0xBC /* sha3 */
#define HDMI_SHA4 0xBD /* sha4 */
#define HDMI_BCAPS_READ 0xBE /* BCAPS read / debug */
#define HDMI_AKSV_BKSV_7_0_MONITOR 0xBF /* AKSV/BKSV[7:0] monitor */
#define HDMI_AKSV_BKSV_15_8_MONITOR 0xC0 /* AKSV/BKSV[15:8] monitor */
#define HDMI_AKSV_BKSV_23_16_MONITOR 0xC1 /* AKSV/BKSV[23:16] monitor */
#define HDMI_AKSV_BKSV_31_24_MONITOR 0xC2 /* AKSV/BKSV[31:24] monitor */
#define HDMI_AKSV_BKSV_39_32_MONITOR 0xC3 /* AKSV/BKSV[39:32] monitor */
#define HDMI_EDID_SEGMENT_POINTER 0xC4 /* EDID segment pointer */
#define HDMI_EDID_WORD_ADDRESS 0xC5 /* EDID word address */
#define HDMI_EDID_DATA_FIFO_ADDRESS 0xC6 /* EDID data FIFO address */
#define HDMI_NUM_OF_HDMI_DEVICES 0xC7 /* Number of HDMI devices */
#define HDMI_HDCP_ERROR_CODE 0xC8 /* HDCP error code */
#define HDMI_100MS_TIMER_SET 0xC9 /* 100ms timer setting */
#define HDMI_5SEC_TIMER_SET 0xCA /* 5sec timer setting */
#define HDMI_RI_READ_COUNT 0xCB /* Ri read count */
#define HDMI_AN_SEED 0xCC /* An seed */
#define HDMI_MAX_NUM_OF_RCIVRS_ALLOWED 0xCD /* Maximum number of receivers allowed */
#define HDMI_HDCP_MEMORY_ACCESS_CONTROL_1 0xCE /* HDCP memory access control.1 */
#define HDMI_HDCP_MEMORY_ACCESS_CONTROL_2 0xCF /* HDCP memory access control.2 */
#define HDMI_HDCP_CONTROL_2 0xD0 /* HDCP Control 2 */
#define HDMI_HDCP_KEY_MEMORY_CONTROL 0xD2 /* HDCP Key Memory Control */
#define HDMI_COLOR_SPACE_CONV_CONFIG_1 0xD3 /* Color space conversion configuration.1 */
#define HDMI_VIDEO_SETTING_3 0xD4 /* Video setting.3 */
#define HDMI_RI_7_0 0xD5 /* Ri[7:0] */
#define HDMI_RI_15_8 0xD6 /* Ri[15:8] */
#define HDMI_PJ 0xD7 /* Pj */
#define HDMI_SHA_RD 0xD8 /* sha_rd */
#define HDMI_RI_7_0_SAVED 0xD9 /* Ri[7:0] saved */
#define HDMI_RI_15_8_SAVED 0xDA /* Ri[15:8] saved */
#define HDMI_PJ_SAVED 0xDB /* Pj saved */
#define HDMI_NUM_OF_DEVICES 0xDC /* Number of devices */
#define HDMI_HOT_PLUG_MSENS_STATUS 0xDF /* Hot plug/MSENS status */
#define HDMI_BCAPS_WRITE 0xE0 /* bcaps */
#define HDMI_BSTAT_7_0 0xE1 /* bstat[7:0] */
#define HDMI_BSTAT_15_8 0xE2 /* bstat[15:8] */
#define HDMI_BKSV_7_0 0xE3 /* bksv[7:0] */
#define HDMI_BKSV_15_8 0xE4 /* bksv[15:8] */
#define HDMI_BKSV_23_16 0xE5 /* bksv[23:16] */
#define HDMI_BKSV_31_24 0xE6 /* bksv[31:24] */
#define HDMI_BKSV_39_32 0xE7 /* bksv[39:32] */
#define HDMI_AN_7_0 0xE8 /* An[7:0] */
#define HDMI_AN_15_8 0xE9 /* An [15:8] */
#define HDMI_AN_23_16 0xEA /* An [23:16] */
#define HDMI_AN_31_24 0xEB /* An [31:24] */
#define HDMI_AN_39_32 0xEC /* An [39:32] */
#define HDMI_AN_47_40 0xED /* An [47:40] */
#define HDMI_AN_55_48 0xEE /* An [55:48] */
#define HDMI_AN_63_56 0xEF /* An [63:56] */
#define HDMI_PRODUCT_ID 0xF0 /* Product ID */
#define HDMI_REVISION_ID 0xF1 /* Revision ID */
#define HDMI_TEST_MODE 0xFE /* Test mode */
enum hotplug_state {
HDMI_HOTPLUG_DISCONNECTED,
HDMI_HOTPLUG_CONNECTED,
HDMI_HOTPLUG_EDID_DONE,
};
struct sh_hdmi {
void __iomem *base;
enum hotplug_state hp_state; /* hot-plug status */
u8 preprogrammed_vic; /* use a pre-programmed VIC or
the external mode */
u8 edid_block_addr;
u8 edid_segment_nr;
u8 edid_blocks;
struct clk *hdmi_clk;
struct device *dev;
struct fb_info *info;
struct mutex mutex; /* Protect the info pointer */
struct delayed_work edid_work;
struct fb_var_screeninfo var;
struct fb_monspecs monspec;
struct notifier_block notifier;
};
static void hdmi_write(struct sh_hdmi *hdmi, u8 data, u8 reg)
{
iowrite8(data, hdmi->base + reg);
}
static u8 hdmi_read(struct sh_hdmi *hdmi, u8 reg)
{
return ioread8(hdmi->base + reg);
}
/*
* HDMI sound
*/
static unsigned int sh_hdmi_snd_read(struct snd_soc_codec *codec,
unsigned int reg)
{
struct sh_hdmi *hdmi = snd_soc_codec_get_drvdata(codec);
return hdmi_read(hdmi, reg);
}
static int sh_hdmi_snd_write(struct snd_soc_codec *codec,
unsigned int reg,
unsigned int value)
{
struct sh_hdmi *hdmi = snd_soc_codec_get_drvdata(codec);
hdmi_write(hdmi, value, reg);
return 0;
}
static struct snd_soc_dai_driver sh_hdmi_dai = {
.name = "sh_mobile_hdmi-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
},
};
static int sh_hdmi_snd_probe(struct snd_soc_codec *codec)
{
dev_info(codec->dev, "SH Mobile HDMI Audio Codec");
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_sh_hdmi = {
.probe = sh_hdmi_snd_probe,
.read = sh_hdmi_snd_read,
.write = sh_hdmi_snd_write,
};
/*
* HDMI video
*/
/* External video parameter settings */
static void sh_hdmi_external_video_param(struct sh_hdmi *hdmi)
{
struct fb_var_screeninfo *var = &hdmi->var;
u16 htotal, hblank, hdelay, vtotal, vblank, vdelay, voffset;
u8 sync = 0;
htotal = var->xres + var->right_margin + var->left_margin + var->hsync_len;
hdelay = var->hsync_len + var->left_margin;
hblank = var->right_margin + hdelay;
/*
* Vertical timing looks a bit different in Figure 18,
* but let's try the same first by setting offset = 0
*/
vtotal = var->yres + var->upper_margin + var->lower_margin + var->vsync_len;
vdelay = var->vsync_len + var->upper_margin;
vblank = var->lower_margin + vdelay;
voffset = min(var->upper_margin / 2, 6U);
/*
* [3]: VSYNC polarity: Positive
* [2]: HSYNC polarity: Positive
* [1]: Interlace/Progressive: Progressive
* [0]: External video settings enable: used.
*/
if (var->sync & FB_SYNC_HOR_HIGH_ACT)
sync |= 4;
if (var->sync & FB_SYNC_VERT_HIGH_ACT)
sync |= 8;
dev_dbg(hdmi->dev, "H: %u, %u, %u, %u; V: %u, %u, %u, %u; sync 0x%x\n",
htotal, hblank, hdelay, var->hsync_len,
vtotal, vblank, vdelay, var->vsync_len, sync);
hdmi_write(hdmi, sync | (voffset << 4), HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS);
hdmi_write(hdmi, htotal, HDMI_EXTERNAL_H_TOTAL_7_0);
hdmi_write(hdmi, htotal >> 8, HDMI_EXTERNAL_H_TOTAL_11_8);
hdmi_write(hdmi, hblank, HDMI_EXTERNAL_H_BLANK_7_0);
hdmi_write(hdmi, hblank >> 8, HDMI_EXTERNAL_H_BLANK_9_8);
hdmi_write(hdmi, hdelay, HDMI_EXTERNAL_H_DELAY_7_0);
hdmi_write(hdmi, hdelay >> 8, HDMI_EXTERNAL_H_DELAY_9_8);
hdmi_write(hdmi, var->hsync_len, HDMI_EXTERNAL_H_DURATION_7_0);
hdmi_write(hdmi, var->hsync_len >> 8, HDMI_EXTERNAL_H_DURATION_9_8);
hdmi_write(hdmi, vtotal, HDMI_EXTERNAL_V_TOTAL_7_0);
hdmi_write(hdmi, vtotal >> 8, HDMI_EXTERNAL_V_TOTAL_9_8);
hdmi_write(hdmi, vblank, HDMI_EXTERNAL_V_BLANK);
hdmi_write(hdmi, vdelay, HDMI_EXTERNAL_V_DELAY);
hdmi_write(hdmi, var->vsync_len, HDMI_EXTERNAL_V_DURATION);
/* Set bit 0 of HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS here for external mode */
if (!hdmi->preprogrammed_vic)
hdmi_write(hdmi, sync | 1 | (voffset << 4),
HDMI_EXTERNAL_VIDEO_PARAM_SETTINGS);
}
/**
* sh_hdmi_video_config()
*/
static void sh_hdmi_video_config(struct sh_hdmi *hdmi)
{
/*
* [7:4]: Audio sampling frequency: 48kHz
* [3:1]: Input video format: RGB and YCbCr 4:4:4 (Y on Green)
* [0]: Internal/External DE select: internal
*/
hdmi_write(hdmi, 0x20, HDMI_AUDIO_VIDEO_SETTING_1);
/*
* [7:6]: Video output format: RGB 4:4:4
* [5:4]: Input video data width: 8 bit
* [3:1]: EAV/SAV location: channel 1
* [0]: Video input color space: RGB
*/
hdmi_write(hdmi, 0x34, HDMI_VIDEO_SETTING_1);
/*
* [7:6]: Together with bit [6] of HDMI_AUDIO_VIDEO_SETTING_2, which is
* left at 0 by default, this configures 24bpp and sets the Color Depth
* (CD) field in the General Control Packet
*/
hdmi_write(hdmi, 0x20, HDMI_DEEP_COLOR_MODES);
}
/**
* sh_hdmi_audio_config()
*/
static void sh_hdmi_audio_config(struct sh_hdmi *hdmi)
{
u8 data;
struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
/*
* [7:4] L/R data swap control
* [3:0] appropriate N[19:16]
*/
hdmi_write(hdmi, 0x00, HDMI_L_R_DATA_SWAP_CTRL_RPKT);
/* appropriate N[15:8] */
hdmi_write(hdmi, 0x18, HDMI_20_BIT_N_FOR_AUDIO_RPKT_15_8);
/* appropriate N[7:0] */
hdmi_write(hdmi, 0x00, HDMI_20_BIT_N_FOR_AUDIO_RPKT_7_0);
/* [7:4] 48 kHz SPDIF not used */
hdmi_write(hdmi, 0x20, HDMI_SPDIF_AUDIO_SAMP_FREQ_CTS);
/*
* [6:5] set required down sampling rate if required
* [4:3] set required audio source
*/
switch (pdata->flags & HDMI_SND_SRC_MASK) {
default:
/* fall through */
case HDMI_SND_SRC_I2S:
data = 0x0 << 3;
break;
case HDMI_SND_SRC_SPDIF:
data = 0x1 << 3;
break;
case HDMI_SND_SRC_DSD:
data = 0x2 << 3;
break;
case HDMI_SND_SRC_HBR:
data = 0x3 << 3;
break;
}
hdmi_write(hdmi, data, HDMI_AUDIO_SETTING_1);
/* [3:0] set sending channel number for channel status */
hdmi_write(hdmi, 0x40, HDMI_AUDIO_SETTING_2);
/*
* [5:2] set valid I2S source input pin
* [1:0] set input I2S source mode
*/
hdmi_write(hdmi, 0x04, HDMI_I2S_AUDIO_SET);
/* [7:4] set valid DSD source input pin */
hdmi_write(hdmi, 0x00, HDMI_DSD_AUDIO_SET);
/* [7:0] set appropriate I2S input pin swap settings if required */
hdmi_write(hdmi, 0x00, HDMI_I2S_INPUT_PIN_SWAP);
/*
* [7] set validity bit for channel status
* [3:0] set original sample frequency for channel status
*/
hdmi_write(hdmi, 0x00, HDMI_AUDIO_STATUS_BITS_SETTING_1);
/*
* [7] set value for channel status
* [6] set value for channel status
* [5] set copyright bit for channel status
* [4:2] set additional information for channel status
* [1:0] set clock accuracy for channel status
*/
hdmi_write(hdmi, 0x00, HDMI_AUDIO_STATUS_BITS_SETTING_2);
/* [7:0] set category code for channel status */
hdmi_write(hdmi, 0x00, HDMI_CATEGORY_CODE);
/*
* [7:4] set source number for channel status
* [3:0] set word length for channel status
*/
hdmi_write(hdmi, 0x00, HDMI_SOURCE_NUM_AUDIO_WORD_LEN);
/* [7:4] set sample frequency for channel status */
hdmi_write(hdmi, 0x20, HDMI_AUDIO_VIDEO_SETTING_1);
}
/**
* sh_hdmi_phy_config() - configure the HDMI PHY for the used video mode
*/
static void sh_hdmi_phy_config(struct sh_hdmi *hdmi)
{
if (hdmi->var.pixclock < 10000) {
/* for 1080p8bit 148MHz */
hdmi_write(hdmi, 0x1d, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
hdmi_write(hdmi, 0x4c, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
hdmi_write(hdmi, 0x1e, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
hdmi_write(hdmi, 0x48, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
hdmi_write(hdmi, 0x0e, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
hdmi_write(hdmi, 0x25, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
} else if (hdmi->var.pixclock < 30000) {
/* 720p, 8bit, 74.25MHz. Might need to be adjusted for other formats */
/*
* [1:0] Speed_A
* [3:2] Speed_B
* [4] PLLA_Bypass
* [6] DRV_TEST_EN
* [7] DRV_TEST_IN
*/
hdmi_write(hdmi, 0x0f, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
/* PLLB_CONFIG[17], PLLA_CONFIG[17] - not in PHY datasheet */
hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
/*
* [2:0] BGR_I_OFFSET
* [6:4] BGR_V_OFFSET
*/
hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
/* PLLA_CONFIG[7:0]: VCO gain, VCO offset, LPF resistance[0] */
hdmi_write(hdmi, 0x44, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
/*
* PLLA_CONFIG[15:8]: regulator voltage[0], CP current,
* LPF capacitance, LPF resistance[1]
*/
hdmi_write(hdmi, 0x32, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
/* PLLB_CONFIG[7:0]: LPF resistance[0], VCO offset, VCO gain */
hdmi_write(hdmi, 0x4A, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
/*
* PLLB_CONFIG[15:8]: regulator voltage[0], CP current,
* LPF capacitance, LPF resistance[1]
*/
hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
/* DRV_CONFIG, PE_CONFIG */
hdmi_write(hdmi, 0x25, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
/*
* [2:0] AMON_SEL (4 == LPF voltage)
* [4] PLLA_CONFIG[16]
* [5] PLLB_CONFIG[16]
*/
hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
} else {
/* for 480p8bit 27MHz */
hdmi_write(hdmi, 0x19, HDMI_SLIPHDMIT_PARAM_SETTINGS_1);
hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_2);
hdmi_write(hdmi, 0x00, HDMI_SLIPHDMIT_PARAM_SETTINGS_3);
hdmi_write(hdmi, 0x44, HDMI_SLIPHDMIT_PARAM_SETTINGS_5);
hdmi_write(hdmi, 0x32, HDMI_SLIPHDMIT_PARAM_SETTINGS_6);
hdmi_write(hdmi, 0x48, HDMI_SLIPHDMIT_PARAM_SETTINGS_7);
hdmi_write(hdmi, 0x0F, HDMI_SLIPHDMIT_PARAM_SETTINGS_8);
hdmi_write(hdmi, 0x20, HDMI_SLIPHDMIT_PARAM_SETTINGS_9);
hdmi_write(hdmi, 0x04, HDMI_SLIPHDMIT_PARAM_SETTINGS_10);
}
}
/**
* sh_hdmi_avi_infoframe_setup() - Auxiliary Video Information InfoFrame CONTROL PACKET
*/
static void sh_hdmi_avi_infoframe_setup(struct sh_hdmi *hdmi)
{
u8 vic;
/* AVI InfoFrame */
hdmi_write(hdmi, 0x06, HDMI_CTRL_PKT_BUF_INDEX);
/* Packet Type = 0x82 */
hdmi_write(hdmi, 0x82, HDMI_CTRL_PKT_BUF_ACCESS_HB0);
/* Version = 0x02 */
hdmi_write(hdmi, 0x02, HDMI_CTRL_PKT_BUF_ACCESS_HB1);
/* Length = 13 (0x0D) */
hdmi_write(hdmi, 0x0D, HDMI_CTRL_PKT_BUF_ACCESS_HB2);
/* N. A. Checksum */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB0);
/*
* Y = RGB
* A0 = No Data
* B = Bar Data not valid
* S = No Data
*/
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB1);
/*
* [7:6] C = Colorimetry: no data
* [5:4] M = 2: 16:9, 1: 4:3 Picture Aspect Ratio
* [3:0] R = 8: Active Frame Aspect Ratio: same as picture aspect ratio
*/
hdmi_write(hdmi, 0x28, HDMI_CTRL_PKT_BUF_ACCESS_PB2);
/*
* ITC = No Data
* EC = xvYCC601
* Q = Default (depends on video format)
* SC = No Known non_uniform Scaling
*/
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB3);
/*
* VIC should be ignored if external config is used, so, we could just use 0,
* but play safe and use a valid value in any case just in case
*/
if (hdmi->preprogrammed_vic)
vic = hdmi->preprogrammed_vic;
else
vic = 4;
hdmi_write(hdmi, vic, HDMI_CTRL_PKT_BUF_ACCESS_PB4);
/* PR = No Repetition */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB5);
/* Line Number of End of Top Bar (lower 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB6);
/* Line Number of End of Top Bar (upper 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB7);
/* Line Number of Start of Bottom Bar (lower 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB8);
/* Line Number of Start of Bottom Bar (upper 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB9);
/* Pixel Number of End of Left Bar (lower 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB10);
/* Pixel Number of End of Left Bar (upper 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB11);
/* Pixel Number of Start of Right Bar (lower 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB12);
/* Pixel Number of Start of Right Bar (upper 8 bits) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB13);
}
/**
* sh_hdmi_audio_infoframe_setup() - Audio InfoFrame of CONTROL PACKET
*/
static void sh_hdmi_audio_infoframe_setup(struct sh_hdmi *hdmi)
{
/* Audio InfoFrame */
hdmi_write(hdmi, 0x08, HDMI_CTRL_PKT_BUF_INDEX);
/* Packet Type = 0x84 */
hdmi_write(hdmi, 0x84, HDMI_CTRL_PKT_BUF_ACCESS_HB0);
/* Version Number = 0x01 */
hdmi_write(hdmi, 0x01, HDMI_CTRL_PKT_BUF_ACCESS_HB1);
/* 0 Length = 10 (0x0A) */
hdmi_write(hdmi, 0x0A, HDMI_CTRL_PKT_BUF_ACCESS_HB2);
/* n. a. Checksum */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB0);
/* Audio Channel Count = Refer to Stream Header */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB1);
/* Refer to Stream Header */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB2);
/* Format depends on coding type (i.e. CT0...CT3) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB3);
/* Speaker Channel Allocation = Front Right + Front Left */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB4);
/* Level Shift Value = 0 dB, Down - mix is permitted or no information */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB5);
/* Reserved (0) */
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB6);
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB7);
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB8);
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB9);
hdmi_write(hdmi, 0x00, HDMI_CTRL_PKT_BUF_ACCESS_PB10);
}
/**
* sh_hdmi_configure() - Initialise HDMI for output
*/
static void sh_hdmi_configure(struct sh_hdmi *hdmi)
{
/* Configure video format */
sh_hdmi_video_config(hdmi);
/* Configure audio format */
sh_hdmi_audio_config(hdmi);
/* Configure PHY */
sh_hdmi_phy_config(hdmi);
/* Auxiliary Video Information (AVI) InfoFrame */
sh_hdmi_avi_infoframe_setup(hdmi);
/* Audio InfoFrame */
sh_hdmi_audio_infoframe_setup(hdmi);
/*
* Control packet auto send with VSYNC control: auto send
* General control, Gamut metadata, ISRC, and ACP packets
*/
hdmi_write(hdmi, 0x8E, HDMI_CTRL_PKT_AUTO_SEND);
/* FIXME */
msleep(10);
/* PS mode b->d, reset PLLA and PLLB */
hdmi_write(hdmi, 0x4C, HDMI_SYSTEM_CTRL);
udelay(10);
hdmi_write(hdmi, 0x40, HDMI_SYSTEM_CTRL);
}
static unsigned long sh_hdmi_rate_error(struct sh_hdmi *hdmi,
const struct fb_videomode *mode,
unsigned long *hdmi_rate, unsigned long *parent_rate)
{
unsigned long target = PICOS2KHZ(mode->pixclock) * 1000, rate_error;
struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
*hdmi_rate = clk_round_rate(hdmi->hdmi_clk, target);
if ((long)*hdmi_rate < 0)
*hdmi_rate = clk_get_rate(hdmi->hdmi_clk);
rate_error = (long)*hdmi_rate > 0 ? abs(*hdmi_rate - target) : ULONG_MAX;
if (rate_error && pdata->clk_optimize_parent)
rate_error = pdata->clk_optimize_parent(target, hdmi_rate, parent_rate);
else if (clk_get_parent(hdmi->hdmi_clk))
*parent_rate = clk_get_rate(clk_get_parent(hdmi->hdmi_clk));
dev_dbg(hdmi->dev, "%u-%u-%u-%u x %u-%u-%u-%u\n",
mode->left_margin, mode->xres,
mode->right_margin, mode->hsync_len,
mode->upper_margin, mode->yres,
mode->lower_margin, mode->vsync_len);
dev_dbg(hdmi->dev, "\t@%lu(+/-%lu)Hz, e=%lu / 1000, r=%uHz, p=%luHz\n", target,
rate_error, rate_error ? 10000 / (10 * target / rate_error) : 0,
mode->refresh, *parent_rate);
return rate_error;
}
static int sh_hdmi_read_edid(struct sh_hdmi *hdmi, unsigned long *hdmi_rate,
unsigned long *parent_rate)
{
struct fb_var_screeninfo tmpvar;
struct fb_var_screeninfo *var = &tmpvar;
const struct fb_videomode *mode, *found = NULL;
struct fb_info *info = hdmi->info;
struct fb_modelist *modelist = NULL;
unsigned int f_width = 0, f_height = 0, f_refresh = 0;
unsigned long found_rate_error = ULONG_MAX; /* silly compiler... */
bool scanning = false, preferred_bad = false;
u8 edid[128];
char *forced;
int i;
/* Read EDID */
dev_dbg(hdmi->dev, "Read back EDID code:");
for (i = 0; i < 128; i++) {
edid[i] = hdmi_read(hdmi, HDMI_EDID_KSV_FIFO_ACCESS_WINDOW);
#ifdef DEBUG
if ((i % 16) == 0) {
printk(KERN_CONT "\n");
printk(KERN_DEBUG "%02X | %02X", i, edid[i]);
} else {
printk(KERN_CONT " %02X", edid[i]);
}
#endif
}
#ifdef DEBUG
printk(KERN_CONT "\n");
#endif
if (!hdmi->edid_blocks) {
fb_edid_to_monspecs(edid, &hdmi->monspec);
hdmi->edid_blocks = edid[126] + 1;
dev_dbg(hdmi->dev, "%d main modes, %d extension blocks\n",
hdmi->monspec.modedb_len, hdmi->edid_blocks - 1);
} else {
dev_dbg(hdmi->dev, "Extension %u detected, DTD start %u\n",
edid[0], edid[2]);
fb_edid_add_monspecs(edid, &hdmi->monspec);
}
if (hdmi->edid_blocks > hdmi->edid_segment_nr * 2 +
(hdmi->edid_block_addr >> 7) + 1) {
/* More blocks to read */
if (hdmi->edid_block_addr) {
hdmi->edid_block_addr = 0;
hdmi->edid_segment_nr++;
} else {
hdmi->edid_block_addr = 0x80;
}
/* Set EDID word address */
hdmi_write(hdmi, hdmi->edid_block_addr, HDMI_EDID_WORD_ADDRESS);
/* Enable EDID interrupt */
hdmi_write(hdmi, 0xC6, HDMI_INTERRUPT_MASK_1);
/* Set EDID segment pointer - starts reading EDID */
hdmi_write(hdmi, hdmi->edid_segment_nr, HDMI_EDID_SEGMENT_POINTER);
return -EAGAIN;
}
/* All E-EDID blocks ready */
dev_dbg(hdmi->dev, "%d main and extended modes\n", hdmi->monspec.modedb_len);
fb_get_options("sh_mobile_lcdc", &forced);
if (forced && *forced) {
/* Only primitive parsing so far */
i = sscanf(forced, "%ux%u@%u",
&f_width, &f_height, &f_refresh);
if (i < 2) {
f_width = 0;
f_height = 0;
} else {
/* The user wants us to use the EDID data */
scanning = true;
}
dev_dbg(hdmi->dev, "Forced mode %ux%u@%uHz\n",
f_width, f_height, f_refresh);
}
/* Walk monitor modes to find the best or the exact match */
for (i = 0, mode = hdmi->monspec.modedb;
i < hdmi->monspec.modedb_len && scanning;
i++, mode++) {
unsigned long rate_error;
if (!f_width && !f_height) {
/*
* A parameter string "video=sh_mobile_lcdc:0x0" means
* use the preferred EDID mode. If it is rejected by
* .fb_check_var(), keep looking, until an acceptable
* one is found.
*/
if ((mode->flag & FB_MODE_IS_FIRST) || preferred_bad)
scanning = false;
else
continue;
} else if (f_width != mode->xres || f_height != mode->yres) {
/* No interest in unmatching modes */
continue;
}
rate_error = sh_hdmi_rate_error(hdmi, mode, hdmi_rate, parent_rate);
if (scanning) {
if (f_refresh == mode->refresh || (!f_refresh && !rate_error))
/*
* Exact match if either the refresh rate
* matches or it hasn't been specified and we've
* found a mode, for which we can configure the
* clock precisely
*/
scanning = false;
else if (found && found_rate_error <= rate_error)
/*
* We otherwise search for the closest matching
* clock rate - either if no refresh rate has
* been specified or we cannot find an exactly
* matching one
*/
continue;
}
/* Check if supported: sufficient fb memory, supported clock-rate */
fb_videomode_to_var(var, mode);
var->bits_per_pixel = info->var.bits_per_pixel;
if (info && info->fbops->fb_check_var &&
info->fbops->fb_check_var(var, info)) {
scanning = true;
preferred_bad = true;
continue;
}
found = mode;
found_rate_error = rate_error;
}
hdmi->var.width = hdmi->monspec.max_x * 10;
hdmi->var.height = hdmi->monspec.max_y * 10;
/*
* TODO 1: if no ->info is present, postpone running the config until
* after ->info first gets registered.
* TODO 2: consider registering the HDMI platform device from the LCDC
* driver, and passing ->info with HDMI platform data.
*/
if (info && !found) {
modelist = info->modelist.next &&
!list_empty(&info->modelist) ?
list_entry(info->modelist.next,
struct fb_modelist, list) :
NULL;
if (modelist) {
found = &modelist->mode;
found_rate_error = sh_hdmi_rate_error(hdmi, found, hdmi_rate, parent_rate);
}
}
/* No cookie today */
if (!found)
return -ENXIO;
if (found->xres == 640 && found->yres == 480 && found->refresh == 60)
hdmi->preprogrammed_vic = 1;
else if (found->xres == 720 && found->yres == 480 && found->refresh == 60)
hdmi->preprogrammed_vic = 2;
else if (found->xres == 720 && found->yres == 576 && found->refresh == 50)
hdmi->preprogrammed_vic = 17;
else if (found->xres == 1280 && found->yres == 720 && found->refresh == 60)
hdmi->preprogrammed_vic = 4;
else if (found->xres == 1920 && found->yres == 1080 && found->refresh == 24)
hdmi->preprogrammed_vic = 32;
else if (found->xres == 1920 && found->yres == 1080 && found->refresh == 50)
hdmi->preprogrammed_vic = 31;
else if (found->xres == 1920 && found->yres == 1080 && found->refresh == 60)
hdmi->preprogrammed_vic = 16;
else
hdmi->preprogrammed_vic = 0;
dev_dbg(hdmi->dev, "Using %s %s mode %ux%u@%uHz (%luHz), clock error %luHz\n",
modelist ? "default" : "EDID", hdmi->preprogrammed_vic ? "VIC" : "external",
found->xres, found->yres, found->refresh,
PICOS2KHZ(found->pixclock) * 1000, found_rate_error);
fb_videomode_to_var(&hdmi->var, found);
sh_hdmi_external_video_param(hdmi);
return 0;
}
static irqreturn_t sh_hdmi_hotplug(int irq, void *dev_id)
{
struct sh_hdmi *hdmi = dev_id;
u8 status1, status2, mask1, mask2;
/* mode_b and PLLA and PLLB reset */
hdmi_write(hdmi, 0x2C, HDMI_SYSTEM_CTRL);
/* How long shall reset be held? */
udelay(10);
/* mode_b and PLLA and PLLB reset release */
hdmi_write(hdmi, 0x20, HDMI_SYSTEM_CTRL);
status1 = hdmi_read(hdmi, HDMI_INTERRUPT_STATUS_1);
status2 = hdmi_read(hdmi, HDMI_INTERRUPT_STATUS_2);
mask1 = hdmi_read(hdmi, HDMI_INTERRUPT_MASK_1);
mask2 = hdmi_read(hdmi, HDMI_INTERRUPT_MASK_2);
/* Correct would be to ack only set bits, but the datasheet requires 0xff */
hdmi_write(hdmi, 0xFF, HDMI_INTERRUPT_STATUS_1);
hdmi_write(hdmi, 0xFF, HDMI_INTERRUPT_STATUS_2);
if (printk_ratelimit())
dev_dbg(hdmi->dev, "IRQ #%d: Status #1: 0x%x & 0x%x, #2: 0x%x & 0x%x\n",
irq, status1, mask1, status2, mask2);
if (!((status1 & mask1) | (status2 & mask2))) {
return IRQ_NONE;
} else if (status1 & 0xc0) {
u8 msens;
/* Datasheet specifies 10ms... */
udelay(500);
msens = hdmi_read(hdmi, HDMI_HOT_PLUG_MSENS_STATUS);
dev_dbg(hdmi->dev, "MSENS 0x%x\n", msens);
/* Check, if hot plug & MSENS pin status are both high */
if ((msens & 0xC0) == 0xC0) {
/* Display plug in */
hdmi->edid_segment_nr = 0;
hdmi->edid_block_addr = 0;
hdmi->edid_blocks = 0;
hdmi->hp_state = HDMI_HOTPLUG_CONNECTED;
/* Set EDID word address */
hdmi_write(hdmi, 0x00, HDMI_EDID_WORD_ADDRESS);
/* Enable EDID interrupt */
hdmi_write(hdmi, 0xC6, HDMI_INTERRUPT_MASK_1);
/* Set EDID segment pointer - starts reading EDID */
hdmi_write(hdmi, 0x00, HDMI_EDID_SEGMENT_POINTER);
} else if (!(status1 & 0x80)) {
/* Display unplug, beware multiple interrupts */
if (hdmi->hp_state != HDMI_HOTPLUG_DISCONNECTED) {
hdmi->hp_state = HDMI_HOTPLUG_DISCONNECTED;
schedule_delayed_work(&hdmi->edid_work, 0);
}
/* display_off will switch back to mode_a */
}
} else if (status1 & 2) {
/* EDID error interrupt: retry */
/* Set EDID word address */
hdmi_write(hdmi, hdmi->edid_block_addr, HDMI_EDID_WORD_ADDRESS);
/* Set EDID segment pointer */
hdmi_write(hdmi, hdmi->edid_segment_nr, HDMI_EDID_SEGMENT_POINTER);
} else if (status1 & 4) {
/* Disable EDID interrupt */
hdmi_write(hdmi, 0xC0, HDMI_INTERRUPT_MASK_1);
schedule_delayed_work(&hdmi->edid_work, msecs_to_jiffies(10));
}
return IRQ_HANDLED;
}
/* locking: called with info->lock held, or before register_framebuffer() */
static void sh_hdmi_display_on(void *arg, struct fb_info *info)
{
/*
* info is guaranteed to be valid, when we are called, because our
* FB_EVENT_FB_UNBIND notify is also called with info->lock held
*/
struct sh_hdmi *hdmi = arg;
struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
struct sh_mobile_lcdc_chan *ch = info->par;
dev_dbg(hdmi->dev, "%s(%p): state %x\n", __func__,
pdata->lcd_dev, info->state);
/* No need to lock */
hdmi->info = info;
/*
* hp_state can be set to
* HDMI_HOTPLUG_DISCONNECTED: on monitor unplug
* HDMI_HOTPLUG_CONNECTED: on monitor plug-in
* HDMI_HOTPLUG_EDID_DONE: on EDID read completion
*/
switch (hdmi->hp_state) {
case HDMI_HOTPLUG_EDID_DONE:
/* PS mode d->e. All functions are active */
hdmi_write(hdmi, 0x80, HDMI_SYSTEM_CTRL);
dev_dbg(hdmi->dev, "HDMI running\n");
break;
case HDMI_HOTPLUG_DISCONNECTED:
info->state = FBINFO_STATE_SUSPENDED;
default:
hdmi->var = ch->display_var;
}
}
/* locking: called with info->lock held */
static void sh_hdmi_display_off(void *arg)
{
struct sh_hdmi *hdmi = arg;
struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
dev_dbg(hdmi->dev, "%s(%p)\n", __func__, pdata->lcd_dev);
/* PS mode e->a */
hdmi_write(hdmi, 0x10, HDMI_SYSTEM_CTRL);
}
static bool sh_hdmi_must_reconfigure(struct sh_hdmi *hdmi)
{
struct fb_info *info = hdmi->info;
struct sh_mobile_lcdc_chan *ch = info->par;
struct fb_var_screeninfo *new_var = &hdmi->var, *old_var = &ch->display_var;
struct fb_videomode mode1, mode2;
fb_var_to_videomode(&mode1, old_var);
fb_var_to_videomode(&mode2, new_var);
dev_dbg(info->dev, "Old %ux%u, new %ux%u\n",
mode1.xres, mode1.yres, mode2.xres, mode2.yres);
if (fb_mode_is_equal(&mode1, &mode2)) {
/* It can be a different monitor with an equal video-mode */
old_var->width = new_var->width;
old_var->height = new_var->height;
return false;
}
dev_dbg(info->dev, "Switching %u -> %u lines\n",
mode1.yres, mode2.yres);
*old_var = *new_var;
return true;
}
/**
* sh_hdmi_clk_configure() - set HDMI clock frequency and enable the clock
* @hdmi: driver context
* @hdmi_rate: HDMI clock frequency in Hz
* @parent_rate: if != 0 - set parent clock rate for optimal precision
* return: configured positive rate if successful
* 0 if couldn't set the rate, but managed to enable the
* clock, negative error, if couldn't enable the clock
*/
static long sh_hdmi_clk_configure(struct sh_hdmi *hdmi, unsigned long hdmi_rate,
unsigned long parent_rate)
{
int ret;
if (parent_rate && clk_get_parent(hdmi->hdmi_clk)) {
ret = clk_set_rate(clk_get_parent(hdmi->hdmi_clk), parent_rate);
if (ret < 0) {
dev_warn(hdmi->dev, "Cannot set parent rate %ld: %d\n", parent_rate, ret);
hdmi_rate = clk_round_rate(hdmi->hdmi_clk, hdmi_rate);
} else {
dev_dbg(hdmi->dev, "HDMI set parent frequency %lu\n", parent_rate);
}
}
ret = clk_set_rate(hdmi->hdmi_clk, hdmi_rate);
if (ret < 0) {
dev_warn(hdmi->dev, "Cannot set rate %ld: %d\n", hdmi_rate, ret);
hdmi_rate = 0;
} else {
dev_dbg(hdmi->dev, "HDMI set frequency %lu\n", hdmi_rate);
}
return hdmi_rate;
}
/* Hotplug interrupt occurred, read EDID */
static void sh_hdmi_edid_work_fn(struct work_struct *work)
{
struct sh_hdmi *hdmi = container_of(work, struct sh_hdmi, edid_work.work);
struct fb_info *info;
struct sh_mobile_hdmi_info *pdata = hdmi->dev->platform_data;
struct sh_mobile_lcdc_chan *ch;
int ret;
dev_dbg(hdmi->dev, "%s(%p): begin, hotplug status %d\n", __func__,
pdata->lcd_dev, hdmi->hp_state);
if (!pdata->lcd_dev)
return;
mutex_lock(&hdmi->mutex);
info = hdmi->info;
if (hdmi->hp_state == HDMI_HOTPLUG_CONNECTED) {
unsigned long parent_rate = 0, hdmi_rate;
ret = sh_hdmi_read_edid(hdmi, &hdmi_rate, &parent_rate);
if (ret < 0)
goto out;
hdmi->hp_state = HDMI_HOTPLUG_EDID_DONE;
/* Reconfigure the clock */
ret = sh_hdmi_clk_configure(hdmi, hdmi_rate, parent_rate);
if (ret < 0)
goto out;
msleep(10);
sh_hdmi_configure(hdmi);
/* Switched to another (d) power-save mode */
msleep(10);
if (!info)
goto out;
ch = info->par;
if (lock_fb_info(info)) {
console_lock();
/* HDMI plug in */
if (!sh_hdmi_must_reconfigure(hdmi) &&
info->state == FBINFO_STATE_RUNNING) {
/*
* First activation with the default monitor - just turn
* on, if we run a resume here, the logo disappears
*/
info->var.width = hdmi->var.width;
info->var.height = hdmi->var.height;
sh_hdmi_display_on(hdmi, info);
} else {
/* New monitor or have to wake up */
fb_set_suspend(info, 0);
}
console_unlock();
unlock_fb_info(info);
}
} else {
ret = 0;
if (!info)
goto out;
hdmi->monspec.modedb_len = 0;
fb_destroy_modedb(hdmi->monspec.modedb);
hdmi->monspec.modedb = NULL;
if (lock_fb_info(info)) {
console_lock();
/* HDMI disconnect */
fb_set_suspend(info, 1);
console_unlock();
unlock_fb_info(info);
}
}
out:
if (ret < 0 && ret != -EAGAIN)
hdmi->hp_state = HDMI_HOTPLUG_DISCONNECTED;
mutex_unlock(&hdmi->mutex);
dev_dbg(hdmi->dev, "%s(%p): end\n", __func__, pdata->lcd_dev);
}
static int sh_hdmi_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
struct fb_event *event = data;
struct fb_info *info = event->info;
struct sh_mobile_lcdc_chan *ch = info->par;
struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
struct sh_hdmi *hdmi = board_cfg->board_data;
if (!hdmi || nb != &hdmi->notifier || hdmi->info != info)
return NOTIFY_DONE;
switch(action) {
case FB_EVENT_FB_REGISTERED:
/* Unneeded, activation taken care by sh_hdmi_display_on() */
break;
case FB_EVENT_FB_UNREGISTERED:
/*
* We are called from unregister_framebuffer() with the
* info->lock held. This is bad for us, because we can race with
* the scheduled work, which has to call fb_set_suspend(), which
* takes info->lock internally, so, sh_hdmi_edid_work_fn()
* cannot take and hold info->lock for the whole function
* duration. Using an additional lock creates a classical AB-BA
* lock up. Therefore, we have to release the info->lock
* temporarily, synchronise with the work queue and re-acquire
* the info->lock.
*/
unlock_fb_info(info);
mutex_lock(&hdmi->mutex);
hdmi->info = NULL;
mutex_unlock(&hdmi->mutex);
lock_fb_info(info);
return NOTIFY_OK;
}
return NOTIFY_DONE;
}
static int __init sh_hdmi_probe(struct platform_device *pdev)
{
struct sh_mobile_hdmi_info *pdata = pdev->dev.platform_data;
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct sh_mobile_lcdc_board_cfg *board_cfg;
int irq = platform_get_irq(pdev, 0), ret;
struct sh_hdmi *hdmi;
long rate;
if (!res || !pdata || irq < 0)
return -ENODEV;
hdmi = kzalloc(sizeof(*hdmi), GFP_KERNEL);
if (!hdmi) {
dev_err(&pdev->dev, "Cannot allocate device data\n");
return -ENOMEM;
}
mutex_init(&hdmi->mutex);
hdmi->dev = &pdev->dev;
hdmi->hdmi_clk = clk_get(&pdev->dev, "ick");
if (IS_ERR(hdmi->hdmi_clk)) {
ret = PTR_ERR(hdmi->hdmi_clk);
dev_err(&pdev->dev, "Unable to get clock: %d\n", ret);
goto egetclk;
}
/* An arbitrary relaxed pixclock just to get things started: from standard 480p */
rate = clk_round_rate(hdmi->hdmi_clk, PICOS2KHZ(37037));
if (rate > 0)
rate = sh_hdmi_clk_configure(hdmi, rate, 0);
if (rate < 0) {
ret = rate;
goto erate;
}
ret = clk_enable(hdmi->hdmi_clk);
if (ret < 0) {
dev_err(hdmi->dev, "Cannot enable clock: %d\n", ret);
goto erate;
}
dev_dbg(&pdev->dev, "Enabled HDMI clock at %luHz\n", rate);
if (!request_mem_region(res->start, resource_size(res), dev_name(&pdev->dev))) {
dev_err(&pdev->dev, "HDMI register region already claimed\n");
ret = -EBUSY;
goto ereqreg;
}
hdmi->base = ioremap(res->start, resource_size(res));
if (!hdmi->base) {
dev_err(&pdev->dev, "HDMI register region already claimed\n");
ret = -ENOMEM;
goto emap;
}
platform_set_drvdata(pdev, hdmi);
/* Set up LCDC callbacks */
board_cfg = &pdata->lcd_chan->board_cfg;
board_cfg->owner = THIS_MODULE;
board_cfg->board_data = hdmi;
board_cfg->display_on = sh_hdmi_display_on;
board_cfg->display_off = sh_hdmi_display_off;
INIT_DELAYED_WORK(&hdmi->edid_work, sh_hdmi_edid_work_fn);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
/* Product and revision IDs are 0 in sh-mobile version */
dev_info(&pdev->dev, "Detected HDMI controller 0x%x:0x%x\n",
hdmi_read(hdmi, HDMI_PRODUCT_ID), hdmi_read(hdmi, HDMI_REVISION_ID));
ret = request_irq(irq, sh_hdmi_hotplug, 0,
dev_name(&pdev->dev), hdmi);
if (ret < 0) {
dev_err(&pdev->dev, "Unable to request irq: %d\n", ret);
goto ereqirq;
}
ret = snd_soc_register_codec(&pdev->dev,
&soc_codec_dev_sh_hdmi, &sh_hdmi_dai, 1);
if (ret < 0) {
dev_err(&pdev->dev, "codec registration failed\n");
goto ecodec;
}
hdmi->notifier.notifier_call = sh_hdmi_notify;
fb_register_client(&hdmi->notifier);
return 0;
ecodec:
free_irq(irq, hdmi);
ereqirq:
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
iounmap(hdmi->base);
emap:
release_mem_region(res->start, resource_size(res));
ereqreg:
clk_disable(hdmi->hdmi_clk);
erate:
clk_put(hdmi->hdmi_clk);
egetclk:
mutex_destroy(&hdmi->mutex);
kfree(hdmi);
return ret;
}
static int __exit sh_hdmi_remove(struct platform_device *pdev)
{
struct sh_mobile_hdmi_info *pdata = pdev->dev.platform_data;
struct sh_hdmi *hdmi = platform_get_drvdata(pdev);
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct sh_mobile_lcdc_board_cfg *board_cfg = &pdata->lcd_chan->board_cfg;
int irq = platform_get_irq(pdev, 0);
snd_soc_unregister_codec(&pdev->dev);
fb_unregister_client(&hdmi->notifier);
board_cfg->display_on = NULL;
board_cfg->display_off = NULL;
board_cfg->board_data = NULL;
board_cfg->owner = NULL;
/* No new work will be scheduled, wait for running ISR */
free_irq(irq, hdmi);
/* Wait for already scheduled work */
cancel_delayed_work_sync(&hdmi->edid_work);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
clk_disable(hdmi->hdmi_clk);
clk_put(hdmi->hdmi_clk);
iounmap(hdmi->base);
release_mem_region(res->start, resource_size(res));
mutex_destroy(&hdmi->mutex);
kfree(hdmi);
return 0;
}
static struct platform_driver sh_hdmi_driver = {
.remove = __exit_p(sh_hdmi_remove),
.driver = {
.name = "sh-mobile-hdmi",
},
};
static int __init sh_hdmi_init(void)
{
return platform_driver_probe(&sh_hdmi_driver, sh_hdmi_probe);
}
module_init(sh_hdmi_init);
static void __exit sh_hdmi_exit(void)
{
platform_driver_unregister(&sh_hdmi_driver);
}
module_exit(sh_hdmi_exit);
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_DESCRIPTION("SuperH / ARM-shmobile HDMI driver");
MODULE_LICENSE("GPL v2");
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