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d30555d24e
linux-next/drivers/video/sh_mobile_hdmi.c
Laurent Pinchart d30555d24e fbdev: sh_mobile_hdmi: Don't set sh_hdmi::mode in the display on handler 
The struct sh_hdmi mode field is only used after being assigned by the
EDID read code. There is thus no need to initialize it from the LCDC
display var in the display on handler.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2012-03-12 22:40:54 +01:00

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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 {
struct sh_mobile_lcdc_entity entity;
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 delayed_work edid_work;
struct fb_videomode mode;
struct fb_monspecs monspec;
};
#define entity_to_sh_hdmi(e) container_of(e, struct sh_hdmi, entity)
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_videomode *mode = &hdmi->mode;
u16 htotal, hblank, hdelay, vtotal, vblank, vdelay, voffset;
u8 sync = 0;
htotal = mode->xres + mode->right_margin + mode->left_margin
+ mode->hsync_len;
hdelay = mode->hsync_len + mode->left_margin;
hblank = mode->right_margin + hdelay;
/*
* Vertical timing looks a bit different in Figure 18,
* but let's try the same first by setting offset = 0
*/
vtotal = mode->yres + mode->upper_margin + mode->lower_margin
+ mode->vsync_len;
vdelay = mode->vsync_len + mode->upper_margin;
vblank = mode->lower_margin + vdelay;
voffset = min(mode->upper_margin / 2, 6U);
/*
* [3]: VSYNC polarity: Positive
* [2]: HSYNC polarity: Positive
* [1]: Interlace/Progressive: Progressive
* [0]: External video settings enable: used.
*/
if (mode->sync & FB_SYNC_HOR_HIGH_ACT)
sync |= 4;
if (mode->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, mode->hsync_len,
vtotal, vblank, vdelay, mode->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, mode->hsync_len, HDMI_EXTERNAL_H_DURATION_7_0);
hdmi_write(hdmi, mode->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, mode->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->mode.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->mode.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 sh_mobile_lcdc_chan *ch = hdmi->entity.lcdc;
struct fb_info *info = ch ? ch->info : NULL;
const struct fb_videomode *mode, *found = NULL;
const 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 */
if (ch && ch->notify &&
ch->notify(ch, SH_MOBILE_LCDC_EVENT_DISPLAY_MODE, mode,
NULL)) {
scanning = true;
preferred_bad = true;
continue;
}
found = mode;
found_rate_error = rate_error;
}
/*
* 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);
hdmi->mode = *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;
}
static int sh_hdmi_display_on(struct sh_mobile_lcdc_entity *entity)
{
struct sh_hdmi *hdmi = entity_to_sh_hdmi(entity);
dev_dbg(hdmi->dev, "%s(%p): state %x\n", __func__, hdmi,
hdmi->hp_state);
/*
* 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
*/
if (hdmi->hp_state == 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");
}
return hdmi->hp_state == HDMI_HOTPLUG_DISCONNECTED
? SH_MOBILE_LCDC_DISPLAY_DISCONNECTED
: SH_MOBILE_LCDC_DISPLAY_CONNECTED;
}
static void sh_hdmi_display_off(struct sh_mobile_lcdc_entity *entity)
{
struct sh_hdmi *hdmi = entity_to_sh_hdmi(entity);
dev_dbg(hdmi->dev, "%s(%p)\n", __func__, hdmi);
/* PS mode e->a */
hdmi_write(hdmi, 0x10, HDMI_SYSTEM_CTRL);
}
static const struct sh_mobile_lcdc_entity_ops sh_hdmi_ops = {
.display_on = sh_hdmi_display_on,
.display_off = sh_hdmi_display_off,
};
/**
* 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 sh_mobile_lcdc_chan *ch = hdmi->entity.lcdc;
int ret;
dev_dbg(hdmi->dev, "%s(%p): begin, hotplug status %d\n", __func__, hdmi,
hdmi->hp_state);
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 (ch && ch->notify)
ch->notify(ch, SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT,
&hdmi->mode, &hdmi->monspec);
} else {
hdmi->monspec.modedb_len = 0;
fb_destroy_modedb(hdmi->monspec.modedb);
hdmi->monspec.modedb = NULL;
if (ch && ch->notify)
ch->notify(ch, SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT,
NULL, NULL);
ret = 0;
}
out:
if (ret < 0 && ret != -EAGAIN)
hdmi->hp_state = HDMI_HOTPLUG_DISCONNECTED;
dev_dbg(hdmi->dev, "%s(%p): end\n", __func__, hdmi);
}
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);
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;
}
hdmi->dev = &pdev->dev;
hdmi->entity.owner = THIS_MODULE;
hdmi->entity.ops = &sh_hdmi_ops;
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->entity);
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;
}
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:
kfree(hdmi);
return ret;
}
static int __exit sh_hdmi_remove(struct platform_device *pdev)
{
struct sh_hdmi *hdmi = entity_to_sh_hdmi(platform_get_drvdata(pdev));
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
int irq = platform_get_irq(pdev, 0);
snd_soc_unregister_codec(&pdev->dev);
/* 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));
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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