1077 lines
30 KiB
C
1077 lines
30 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2018 Renesas Electronics
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*
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* Copyright (C) 2016 Atmel
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* Bo Shen <voice.shen@atmel.com>
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*
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* Authors: Bo Shen <voice.shen@atmel.com>
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* Boris Brezillon <boris.brezillon@free-electrons.com>
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* Wu, Songjun <Songjun.Wu@atmel.com>
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*
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* Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
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*/
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#include <linux/gpio/consumer.h>
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#include <linux/i2c-mux.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/clk.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_print.h>
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#include <drm/drm_probe_helper.h>
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#include <sound/hdmi-codec.h>
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#define SII902X_TPI_VIDEO_DATA 0x0
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#define SII902X_TPI_PIXEL_REPETITION 0x8
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#define SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT BIT(5)
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#define SII902X_TPI_AVI_PIXEL_REP_RISING_EDGE BIT(4)
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#define SII902X_TPI_AVI_PIXEL_REP_4X 3
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#define SII902X_TPI_AVI_PIXEL_REP_2X 1
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#define SII902X_TPI_AVI_PIXEL_REP_NONE 0
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#define SII902X_TPI_CLK_RATIO_HALF (0 << 6)
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#define SII902X_TPI_CLK_RATIO_1X (1 << 6)
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#define SII902X_TPI_CLK_RATIO_2X (2 << 6)
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#define SII902X_TPI_CLK_RATIO_4X (3 << 6)
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#define SII902X_TPI_AVI_IN_FORMAT 0x9
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#define SII902X_TPI_AVI_INPUT_BITMODE_12BIT BIT(7)
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#define SII902X_TPI_AVI_INPUT_DITHER BIT(6)
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#define SII902X_TPI_AVI_INPUT_RANGE_LIMITED (2 << 2)
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#define SII902X_TPI_AVI_INPUT_RANGE_FULL (1 << 2)
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#define SII902X_TPI_AVI_INPUT_RANGE_AUTO (0 << 2)
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#define SII902X_TPI_AVI_INPUT_COLORSPACE_BLACK (3 << 0)
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#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV422 (2 << 0)
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#define SII902X_TPI_AVI_INPUT_COLORSPACE_YUV444 (1 << 0)
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#define SII902X_TPI_AVI_INPUT_COLORSPACE_RGB (0 << 0)
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#define SII902X_TPI_AVI_INFOFRAME 0x0c
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#define SII902X_SYS_CTRL_DATA 0x1a
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#define SII902X_SYS_CTRL_PWR_DWN BIT(4)
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#define SII902X_SYS_CTRL_AV_MUTE BIT(3)
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#define SII902X_SYS_CTRL_DDC_BUS_REQ BIT(2)
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#define SII902X_SYS_CTRL_DDC_BUS_GRTD BIT(1)
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#define SII902X_SYS_CTRL_OUTPUT_MODE BIT(0)
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#define SII902X_SYS_CTRL_OUTPUT_HDMI 1
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#define SII902X_SYS_CTRL_OUTPUT_DVI 0
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#define SII902X_REG_CHIPID(n) (0x1b + (n))
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#define SII902X_PWR_STATE_CTRL 0x1e
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#define SII902X_AVI_POWER_STATE_MSK GENMASK(1, 0)
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#define SII902X_AVI_POWER_STATE_D(l) ((l) & SII902X_AVI_POWER_STATE_MSK)
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/* Audio */
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#define SII902X_TPI_I2S_ENABLE_MAPPING_REG 0x1f
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#define SII902X_TPI_I2S_CONFIG_FIFO0 (0 << 0)
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#define SII902X_TPI_I2S_CONFIG_FIFO1 (1 << 0)
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#define SII902X_TPI_I2S_CONFIG_FIFO2 (2 << 0)
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#define SII902X_TPI_I2S_CONFIG_FIFO3 (3 << 0)
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#define SII902X_TPI_I2S_LEFT_RIGHT_SWAP (1 << 2)
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#define SII902X_TPI_I2S_AUTO_DOWNSAMPLE (1 << 3)
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#define SII902X_TPI_I2S_SELECT_SD0 (0 << 4)
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#define SII902X_TPI_I2S_SELECT_SD1 (1 << 4)
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#define SII902X_TPI_I2S_SELECT_SD2 (2 << 4)
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#define SII902X_TPI_I2S_SELECT_SD3 (3 << 4)
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#define SII902X_TPI_I2S_FIFO_ENABLE (1 << 7)
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#define SII902X_TPI_I2S_INPUT_CONFIG_REG 0x20
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#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES (0 << 0)
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#define SII902X_TPI_I2S_FIRST_BIT_SHIFT_NO (1 << 0)
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#define SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST (0 << 1)
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#define SII902X_TPI_I2S_SD_DIRECTION_LSB_FIRST (1 << 1)
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#define SII902X_TPI_I2S_SD_JUSTIFY_LEFT (0 << 2)
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#define SII902X_TPI_I2S_SD_JUSTIFY_RIGHT (1 << 2)
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#define SII902X_TPI_I2S_WS_POLARITY_LOW (0 << 3)
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#define SII902X_TPI_I2S_WS_POLARITY_HIGH (1 << 3)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_128 (0 << 4)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_256 (1 << 4)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_384 (2 << 4)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_512 (3 << 4)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_768 (4 << 4)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1024 (5 << 4)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_1152 (6 << 4)
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#define SII902X_TPI_I2S_MCLK_MULTIPLIER_192 (7 << 4)
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#define SII902X_TPI_I2S_SCK_EDGE_FALLING (0 << 7)
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#define SII902X_TPI_I2S_SCK_EDGE_RISING (1 << 7)
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#define SII902X_TPI_I2S_STRM_HDR_BASE 0x21
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#define SII902X_TPI_I2S_STRM_HDR_SIZE 5
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#define SII902X_TPI_AUDIO_CONFIG_BYTE2_REG 0x26
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#define SII902X_TPI_AUDIO_CODING_STREAM_HEADER (0 << 0)
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#define SII902X_TPI_AUDIO_CODING_PCM (1 << 0)
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#define SII902X_TPI_AUDIO_CODING_AC3 (2 << 0)
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#define SII902X_TPI_AUDIO_CODING_MPEG1 (3 << 0)
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#define SII902X_TPI_AUDIO_CODING_MP3 (4 << 0)
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#define SII902X_TPI_AUDIO_CODING_MPEG2 (5 << 0)
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#define SII902X_TPI_AUDIO_CODING_AAC (6 << 0)
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#define SII902X_TPI_AUDIO_CODING_DTS (7 << 0)
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#define SII902X_TPI_AUDIO_CODING_ATRAC (8 << 0)
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#define SII902X_TPI_AUDIO_MUTE_DISABLE (0 << 4)
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#define SII902X_TPI_AUDIO_MUTE_ENABLE (1 << 4)
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#define SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS (0 << 5)
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#define SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS (1 << 5)
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#define SII902X_TPI_AUDIO_INTERFACE_DISABLE (0 << 6)
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#define SII902X_TPI_AUDIO_INTERFACE_SPDIF (1 << 6)
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#define SII902X_TPI_AUDIO_INTERFACE_I2S (2 << 6)
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#define SII902X_TPI_AUDIO_CONFIG_BYTE3_REG 0x27
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#define SII902X_TPI_AUDIO_FREQ_STREAM (0 << 3)
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#define SII902X_TPI_AUDIO_FREQ_32KHZ (1 << 3)
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#define SII902X_TPI_AUDIO_FREQ_44KHZ (2 << 3)
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#define SII902X_TPI_AUDIO_FREQ_48KHZ (3 << 3)
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#define SII902X_TPI_AUDIO_FREQ_88KHZ (4 << 3)
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#define SII902X_TPI_AUDIO_FREQ_96KHZ (5 << 3)
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#define SII902X_TPI_AUDIO_FREQ_176KHZ (6 << 3)
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#define SII902X_TPI_AUDIO_FREQ_192KHZ (7 << 3)
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#define SII902X_TPI_AUDIO_SAMPLE_SIZE_STREAM (0 << 6)
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#define SII902X_TPI_AUDIO_SAMPLE_SIZE_16 (1 << 6)
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#define SII902X_TPI_AUDIO_SAMPLE_SIZE_20 (2 << 6)
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#define SII902X_TPI_AUDIO_SAMPLE_SIZE_24 (3 << 6)
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#define SII902X_TPI_AUDIO_CONFIG_BYTE4_REG 0x28
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#define SII902X_INT_ENABLE 0x3c
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#define SII902X_INT_STATUS 0x3d
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#define SII902X_HOTPLUG_EVENT BIT(0)
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#define SII902X_PLUGGED_STATUS BIT(2)
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#define SII902X_REG_TPI_RQB 0xc7
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/* Indirect internal register access */
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#define SII902X_IND_SET_PAGE 0xbc
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#define SII902X_IND_OFFSET 0xbd
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#define SII902X_IND_VALUE 0xbe
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#define SII902X_TPI_MISC_INFOFRAME_BASE 0xbf
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#define SII902X_TPI_MISC_INFOFRAME_END 0xde
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#define SII902X_TPI_MISC_INFOFRAME_SIZE \
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(SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
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#define SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS 500
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#define SII902X_AUDIO_PORT_INDEX 3
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struct sii902x {
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struct i2c_client *i2c;
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struct regmap *regmap;
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struct drm_bridge bridge;
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struct drm_connector connector;
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struct gpio_desc *reset_gpio;
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struct i2c_mux_core *i2cmux;
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/*
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* Mutex protects audio and video functions from interfering
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* each other, by keeping their i2c command sequences atomic.
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*/
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struct mutex mutex;
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struct sii902x_audio {
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struct platform_device *pdev;
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struct clk *mclk;
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u32 i2s_fifo_sequence[4];
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} audio;
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};
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static int sii902x_read_unlocked(struct i2c_client *i2c, u8 reg, u8 *val)
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{
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union i2c_smbus_data data;
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int ret;
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ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
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I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, &data);
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if (ret < 0)
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return ret;
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*val = data.byte;
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return 0;
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}
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static int sii902x_write_unlocked(struct i2c_client *i2c, u8 reg, u8 val)
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{
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union i2c_smbus_data data;
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data.byte = val;
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return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,
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I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA,
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&data);
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}
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static int sii902x_update_bits_unlocked(struct i2c_client *i2c, u8 reg, u8 mask,
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u8 val)
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{
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int ret;
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u8 status;
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ret = sii902x_read_unlocked(i2c, reg, &status);
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if (ret)
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return ret;
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status &= ~mask;
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status |= val & mask;
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return sii902x_write_unlocked(i2c, reg, status);
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}
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static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
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{
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return container_of(bridge, struct sii902x, bridge);
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}
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static inline struct sii902x *connector_to_sii902x(struct drm_connector *con)
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{
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return container_of(con, struct sii902x, connector);
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}
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static void sii902x_reset(struct sii902x *sii902x)
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{
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if (!sii902x->reset_gpio)
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return;
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gpiod_set_value(sii902x->reset_gpio, 1);
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/* The datasheet says treset-min = 100us. Make it 150us to be sure. */
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usleep_range(150, 200);
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gpiod_set_value(sii902x->reset_gpio, 0);
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}
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static enum drm_connector_status
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sii902x_connector_detect(struct drm_connector *connector, bool force)
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{
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struct sii902x *sii902x = connector_to_sii902x(connector);
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unsigned int status;
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mutex_lock(&sii902x->mutex);
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regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
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mutex_unlock(&sii902x->mutex);
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return (status & SII902X_PLUGGED_STATUS) ?
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connector_status_connected : connector_status_disconnected;
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}
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static const struct drm_connector_funcs sii902x_connector_funcs = {
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.detect = sii902x_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = drm_connector_cleanup,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static int sii902x_get_modes(struct drm_connector *connector)
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{
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struct sii902x *sii902x = connector_to_sii902x(connector);
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u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
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u8 output_mode = SII902X_SYS_CTRL_OUTPUT_DVI;
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struct edid *edid;
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int num = 0, ret;
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mutex_lock(&sii902x->mutex);
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edid = drm_get_edid(connector, sii902x->i2cmux->adapter[0]);
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drm_connector_update_edid_property(connector, edid);
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if (edid) {
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if (drm_detect_hdmi_monitor(edid))
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output_mode = SII902X_SYS_CTRL_OUTPUT_HDMI;
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num = drm_add_edid_modes(connector, edid);
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kfree(edid);
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}
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ret = drm_display_info_set_bus_formats(&connector->display_info,
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&bus_format, 1);
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if (ret)
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goto error_out;
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ret = regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
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SII902X_SYS_CTRL_OUTPUT_MODE, output_mode);
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if (ret)
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goto error_out;
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ret = num;
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error_out:
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mutex_unlock(&sii902x->mutex);
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return ret;
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}
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static enum drm_mode_status sii902x_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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/* TODO: check mode */
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return MODE_OK;
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}
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static const struct drm_connector_helper_funcs sii902x_connector_helper_funcs = {
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.get_modes = sii902x_get_modes,
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.mode_valid = sii902x_mode_valid,
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};
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static void sii902x_bridge_disable(struct drm_bridge *bridge)
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{
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struct sii902x *sii902x = bridge_to_sii902x(bridge);
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mutex_lock(&sii902x->mutex);
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regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
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SII902X_SYS_CTRL_PWR_DWN,
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SII902X_SYS_CTRL_PWR_DWN);
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mutex_unlock(&sii902x->mutex);
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}
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static void sii902x_bridge_enable(struct drm_bridge *bridge)
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{
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struct sii902x *sii902x = bridge_to_sii902x(bridge);
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mutex_lock(&sii902x->mutex);
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regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,
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SII902X_AVI_POWER_STATE_MSK,
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SII902X_AVI_POWER_STATE_D(0));
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regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,
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SII902X_SYS_CTRL_PWR_DWN, 0);
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mutex_unlock(&sii902x->mutex);
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}
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static void sii902x_bridge_mode_set(struct drm_bridge *bridge,
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const struct drm_display_mode *mode,
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const struct drm_display_mode *adj)
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{
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struct sii902x *sii902x = bridge_to_sii902x(bridge);
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struct regmap *regmap = sii902x->regmap;
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u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
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struct hdmi_avi_infoframe frame;
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u16 pixel_clock_10kHz = adj->clock / 10;
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int ret;
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buf[0] = pixel_clock_10kHz & 0xff;
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buf[1] = pixel_clock_10kHz >> 8;
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buf[2] = adj->vrefresh;
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buf[3] = 0x00;
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buf[4] = adj->hdisplay;
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buf[5] = adj->hdisplay >> 8;
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buf[6] = adj->vdisplay;
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buf[7] = adj->vdisplay >> 8;
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buf[8] = SII902X_TPI_CLK_RATIO_1X | SII902X_TPI_AVI_PIXEL_REP_NONE |
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SII902X_TPI_AVI_PIXEL_REP_BUS_24BIT;
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buf[9] = SII902X_TPI_AVI_INPUT_RANGE_AUTO |
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SII902X_TPI_AVI_INPUT_COLORSPACE_RGB;
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mutex_lock(&sii902x->mutex);
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ret = regmap_bulk_write(regmap, SII902X_TPI_VIDEO_DATA, buf, 10);
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if (ret)
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goto out;
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ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
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&sii902x->connector, adj);
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if (ret < 0) {
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DRM_ERROR("couldn't fill AVI infoframe\n");
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goto out;
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}
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ret = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
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if (ret < 0) {
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DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
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goto out;
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}
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/* Do not send the infoframe header, but keep the CRC field. */
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regmap_bulk_write(regmap, SII902X_TPI_AVI_INFOFRAME,
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buf + HDMI_INFOFRAME_HEADER_SIZE - 1,
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HDMI_AVI_INFOFRAME_SIZE + 1);
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out:
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mutex_unlock(&sii902x->mutex);
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}
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static int sii902x_bridge_attach(struct drm_bridge *bridge)
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{
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|
struct sii902x *sii902x = bridge_to_sii902x(bridge);
|
|
struct drm_device *drm = bridge->dev;
|
|
int ret;
|
|
|
|
drm_connector_helper_add(&sii902x->connector,
|
|
&sii902x_connector_helper_funcs);
|
|
|
|
if (!drm_core_check_feature(drm, DRIVER_ATOMIC)) {
|
|
dev_err(&sii902x->i2c->dev,
|
|
"sii902x driver is only compatible with DRM devices supporting atomic updates\n");
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
ret = drm_connector_init(drm, &sii902x->connector,
|
|
&sii902x_connector_funcs,
|
|
DRM_MODE_CONNECTOR_HDMIA);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (sii902x->i2c->irq > 0)
|
|
sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;
|
|
else
|
|
sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;
|
|
|
|
drm_connector_attach_encoder(&sii902x->connector, bridge->encoder);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct drm_bridge_funcs sii902x_bridge_funcs = {
|
|
.attach = sii902x_bridge_attach,
|
|
.mode_set = sii902x_bridge_mode_set,
|
|
.disable = sii902x_bridge_disable,
|
|
.enable = sii902x_bridge_enable,
|
|
};
|
|
|
|
static int sii902x_mute(struct sii902x *sii902x, bool mute)
|
|
{
|
|
struct device *dev = &sii902x->i2c->dev;
|
|
unsigned int val = mute ? SII902X_TPI_AUDIO_MUTE_ENABLE :
|
|
SII902X_TPI_AUDIO_MUTE_DISABLE;
|
|
|
|
dev_dbg(dev, "%s: %s\n", __func__, mute ? "Muted" : "Unmuted");
|
|
|
|
return regmap_update_bits(sii902x->regmap,
|
|
SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
|
|
SII902X_TPI_AUDIO_MUTE_ENABLE, val);
|
|
}
|
|
|
|
static const int sii902x_mclk_div_table[] = {
|
|
128, 256, 384, 512, 768, 1024, 1152, 192 };
|
|
|
|
static int sii902x_select_mclk_div(u8 *i2s_config_reg, unsigned int rate,
|
|
unsigned int mclk)
|
|
{
|
|
int div = mclk / rate;
|
|
int distance = 100000;
|
|
u8 i, nearest = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sii902x_mclk_div_table); i++) {
|
|
unsigned int d = abs(div - sii902x_mclk_div_table[i]);
|
|
|
|
if (d >= distance)
|
|
continue;
|
|
|
|
nearest = i;
|
|
distance = d;
|
|
if (d == 0)
|
|
break;
|
|
}
|
|
|
|
*i2s_config_reg |= nearest << 4;
|
|
|
|
return sii902x_mclk_div_table[nearest];
|
|
}
|
|
|
|
static const struct sii902x_sample_freq {
|
|
u32 freq;
|
|
u8 val;
|
|
} sii902x_sample_freq[] = {
|
|
{ .freq = 32000, .val = SII902X_TPI_AUDIO_FREQ_32KHZ },
|
|
{ .freq = 44000, .val = SII902X_TPI_AUDIO_FREQ_44KHZ },
|
|
{ .freq = 48000, .val = SII902X_TPI_AUDIO_FREQ_48KHZ },
|
|
{ .freq = 88000, .val = SII902X_TPI_AUDIO_FREQ_88KHZ },
|
|
{ .freq = 96000, .val = SII902X_TPI_AUDIO_FREQ_96KHZ },
|
|
{ .freq = 176000, .val = SII902X_TPI_AUDIO_FREQ_176KHZ },
|
|
{ .freq = 192000, .val = SII902X_TPI_AUDIO_FREQ_192KHZ },
|
|
};
|
|
|
|
static int sii902x_audio_hw_params(struct device *dev, void *data,
|
|
struct hdmi_codec_daifmt *daifmt,
|
|
struct hdmi_codec_params *params)
|
|
{
|
|
struct sii902x *sii902x = dev_get_drvdata(dev);
|
|
u8 i2s_config_reg = SII902X_TPI_I2S_SD_DIRECTION_MSB_FIRST;
|
|
u8 config_byte2_reg = (SII902X_TPI_AUDIO_INTERFACE_I2S |
|
|
SII902X_TPI_AUDIO_MUTE_ENABLE |
|
|
SII902X_TPI_AUDIO_CODING_PCM);
|
|
u8 config_byte3_reg = 0;
|
|
u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];
|
|
unsigned long mclk_rate;
|
|
int i, ret;
|
|
|
|
if (daifmt->bit_clk_master || daifmt->frame_clk_master) {
|
|
dev_dbg(dev, "%s: I2S master mode not supported\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (daifmt->fmt) {
|
|
case HDMI_I2S:
|
|
i2s_config_reg |= SII902X_TPI_I2S_FIRST_BIT_SHIFT_YES |
|
|
SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
|
|
break;
|
|
case HDMI_RIGHT_J:
|
|
i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_RIGHT;
|
|
break;
|
|
case HDMI_LEFT_J:
|
|
i2s_config_reg |= SII902X_TPI_I2S_SD_JUSTIFY_LEFT;
|
|
break;
|
|
default:
|
|
dev_dbg(dev, "%s: Unsupported i2s format %u\n", __func__,
|
|
daifmt->fmt);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (daifmt->bit_clk_inv)
|
|
i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_FALLING;
|
|
else
|
|
i2s_config_reg |= SII902X_TPI_I2S_SCK_EDGE_RISING;
|
|
|
|
if (daifmt->frame_clk_inv)
|
|
i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_LOW;
|
|
else
|
|
i2s_config_reg |= SII902X_TPI_I2S_WS_POLARITY_HIGH;
|
|
|
|
if (params->channels > 2)
|
|
config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_8_CHANNELS;
|
|
else
|
|
config_byte2_reg |= SII902X_TPI_AUDIO_LAYOUT_2_CHANNELS;
|
|
|
|
switch (params->sample_width) {
|
|
case 16:
|
|
config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_16;
|
|
break;
|
|
case 20:
|
|
config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_20;
|
|
break;
|
|
case 24:
|
|
case 32:
|
|
config_byte3_reg |= SII902X_TPI_AUDIO_SAMPLE_SIZE_24;
|
|
break;
|
|
default:
|
|
dev_err(dev, "%s: Unsupported sample width %u\n", __func__,
|
|
params->sample_width);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sii902x_sample_freq); i++) {
|
|
if (params->sample_rate == sii902x_sample_freq[i].freq) {
|
|
config_byte3_reg |= sii902x_sample_freq[i].val;
|
|
break;
|
|
}
|
|
}
|
|
|
|
ret = clk_prepare_enable(sii902x->audio.mclk);
|
|
if (ret) {
|
|
dev_err(dev, "Enabling mclk failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (sii902x->audio.mclk) {
|
|
mclk_rate = clk_get_rate(sii902x->audio.mclk);
|
|
ret = sii902x_select_mclk_div(&i2s_config_reg,
|
|
params->sample_rate, mclk_rate);
|
|
if (mclk_rate != ret * params->sample_rate)
|
|
dev_dbg(dev, "Inaccurate reference clock (%ld/%d != %u)\n",
|
|
mclk_rate, ret, params->sample_rate);
|
|
}
|
|
|
|
mutex_lock(&sii902x->mutex);
|
|
|
|
ret = regmap_write(sii902x->regmap,
|
|
SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
|
|
config_byte2_reg);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,
|
|
i2s_config_reg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&
|
|
sii902x->audio.i2s_fifo_sequence[i]; i++)
|
|
regmap_write(sii902x->regmap,
|
|
SII902X_TPI_I2S_ENABLE_MAPPING_REG,
|
|
sii902x->audio.i2s_fifo_sequence[i]);
|
|
|
|
ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,
|
|
config_byte3_reg);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,
|
|
params->iec.status,
|
|
min((size_t) SII902X_TPI_I2S_STRM_HDR_SIZE,
|
|
sizeof(params->iec.status)));
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = hdmi_audio_infoframe_pack(¶ms->cea, infoframe_buf,
|
|
sizeof(infoframe_buf));
|
|
if (ret < 0) {
|
|
dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",
|
|
__func__, ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = regmap_bulk_write(sii902x->regmap,
|
|
SII902X_TPI_MISC_INFOFRAME_BASE,
|
|
infoframe_buf,
|
|
min(ret, SII902X_TPI_MISC_INFOFRAME_SIZE));
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* Decode Level 0 Packets */
|
|
ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);
|
|
if (ret)
|
|
goto out;
|
|
|
|
dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);
|
|
out:
|
|
mutex_unlock(&sii902x->mutex);
|
|
|
|
if (ret) {
|
|
clk_disable_unprepare(sii902x->audio.mclk);
|
|
dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,
|
|
ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void sii902x_audio_shutdown(struct device *dev, void *data)
|
|
{
|
|
struct sii902x *sii902x = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&sii902x->mutex);
|
|
|
|
regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,
|
|
SII902X_TPI_AUDIO_INTERFACE_DISABLE);
|
|
|
|
mutex_unlock(&sii902x->mutex);
|
|
|
|
clk_disable_unprepare(sii902x->audio.mclk);
|
|
}
|
|
|
|
static int sii902x_audio_digital_mute(struct device *dev,
|
|
void *data, bool enable)
|
|
{
|
|
struct sii902x *sii902x = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&sii902x->mutex);
|
|
|
|
sii902x_mute(sii902x, enable);
|
|
|
|
mutex_unlock(&sii902x->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sii902x_audio_get_eld(struct device *dev, void *data,
|
|
uint8_t *buf, size_t len)
|
|
{
|
|
struct sii902x *sii902x = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&sii902x->mutex);
|
|
|
|
memcpy(buf, sii902x->connector.eld,
|
|
min(sizeof(sii902x->connector.eld), len));
|
|
|
|
mutex_unlock(&sii902x->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sii902x_audio_get_dai_id(struct snd_soc_component *component,
|
|
struct device_node *endpoint)
|
|
{
|
|
struct of_endpoint of_ep;
|
|
int ret;
|
|
|
|
ret = of_graph_parse_endpoint(endpoint, &of_ep);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* HDMI sound should be located at reg = <3>
|
|
* Return expected DAI index 0.
|
|
*/
|
|
if (of_ep.port == SII902X_AUDIO_PORT_INDEX)
|
|
return 0;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct hdmi_codec_ops sii902x_audio_codec_ops = {
|
|
.hw_params = sii902x_audio_hw_params,
|
|
.audio_shutdown = sii902x_audio_shutdown,
|
|
.digital_mute = sii902x_audio_digital_mute,
|
|
.get_eld = sii902x_audio_get_eld,
|
|
.get_dai_id = sii902x_audio_get_dai_id,
|
|
};
|
|
|
|
static int sii902x_audio_codec_init(struct sii902x *sii902x,
|
|
struct device *dev)
|
|
{
|
|
static const u8 audio_fifo_id[] = {
|
|
SII902X_TPI_I2S_CONFIG_FIFO0,
|
|
SII902X_TPI_I2S_CONFIG_FIFO1,
|
|
SII902X_TPI_I2S_CONFIG_FIFO2,
|
|
SII902X_TPI_I2S_CONFIG_FIFO3,
|
|
};
|
|
static const u8 i2s_lane_id[] = {
|
|
SII902X_TPI_I2S_SELECT_SD0,
|
|
SII902X_TPI_I2S_SELECT_SD1,
|
|
SII902X_TPI_I2S_SELECT_SD2,
|
|
SII902X_TPI_I2S_SELECT_SD3,
|
|
};
|
|
struct hdmi_codec_pdata codec_data = {
|
|
.ops = &sii902x_audio_codec_ops,
|
|
.i2s = 1, /* Only i2s support for now. */
|
|
.spdif = 0,
|
|
.max_i2s_channels = 0,
|
|
};
|
|
u8 lanes[4];
|
|
int num_lanes, i;
|
|
|
|
if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
|
|
dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
|
|
__func__);
|
|
return 0;
|
|
}
|
|
|
|
num_lanes = of_property_read_variable_u8_array(dev->of_node,
|
|
"sil,i2s-data-lanes",
|
|
lanes, 1,
|
|
ARRAY_SIZE(lanes));
|
|
|
|
if (num_lanes == -EINVAL) {
|
|
dev_dbg(dev,
|
|
"%s: No \"sil,i2s-data-lanes\", use default <0>\n",
|
|
__func__);
|
|
num_lanes = 1;
|
|
lanes[0] = 0;
|
|
} else if (num_lanes < 0) {
|
|
dev_err(dev,
|
|
"%s: Error gettin \"sil,i2s-data-lanes\": %d\n",
|
|
__func__, num_lanes);
|
|
return num_lanes;
|
|
}
|
|
codec_data.max_i2s_channels = 2 * num_lanes;
|
|
|
|
for (i = 0; i < num_lanes; i++)
|
|
sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |
|
|
i2s_lane_id[lanes[i]] | SII902X_TPI_I2S_FIFO_ENABLE;
|
|
|
|
sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");
|
|
if (IS_ERR(sii902x->audio.mclk)) {
|
|
dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",
|
|
__func__, PTR_ERR(sii902x->audio.mclk));
|
|
return PTR_ERR(sii902x->audio.mclk);
|
|
}
|
|
|
|
sii902x->audio.pdev = platform_device_register_data(
|
|
dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
|
|
&codec_data, sizeof(codec_data));
|
|
|
|
return PTR_ERR_OR_ZERO(sii902x->audio.pdev);
|
|
}
|
|
|
|
static const struct regmap_range sii902x_volatile_ranges[] = {
|
|
{ .range_min = 0, .range_max = 0xff },
|
|
};
|
|
|
|
static const struct regmap_access_table sii902x_volatile_table = {
|
|
.yes_ranges = sii902x_volatile_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(sii902x_volatile_ranges),
|
|
};
|
|
|
|
static const struct regmap_config sii902x_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.disable_locking = true, /* struct sii902x mutex should be enough */
|
|
.max_register = SII902X_TPI_MISC_INFOFRAME_END,
|
|
.volatile_table = &sii902x_volatile_table,
|
|
.cache_type = REGCACHE_NONE,
|
|
};
|
|
|
|
static irqreturn_t sii902x_interrupt(int irq, void *data)
|
|
{
|
|
struct sii902x *sii902x = data;
|
|
unsigned int status = 0;
|
|
|
|
mutex_lock(&sii902x->mutex);
|
|
|
|
regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
|
|
regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
|
|
|
|
mutex_unlock(&sii902x->mutex);
|
|
|
|
if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev)
|
|
drm_helper_hpd_irq_event(sii902x->bridge.dev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* The purpose of sii902x_i2c_bypass_select is to enable the pass through
|
|
* mode of the HDMI transmitter. Do not use regmap from within this function,
|
|
* only use sii902x_*_unlocked functions to read/modify/write registers.
|
|
* We are holding the parent adapter lock here, keep this in mind before
|
|
* adding more i2c transactions.
|
|
*
|
|
* Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
|
|
* in this driver, we need to make sure that we only touch 0x1A[2:1] from
|
|
* within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
|
|
* we leave the remaining bits as we have found them.
|
|
*/
|
|
static int sii902x_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
|
|
{
|
|
struct sii902x *sii902x = i2c_mux_priv(mux);
|
|
struct device *dev = &sii902x->i2c->dev;
|
|
unsigned long timeout;
|
|
u8 status;
|
|
int ret;
|
|
|
|
ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
|
|
SII902X_SYS_CTRL_DDC_BUS_REQ,
|
|
SII902X_SYS_CTRL_DDC_BUS_REQ);
|
|
if (ret)
|
|
return ret;
|
|
|
|
timeout = jiffies +
|
|
msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
|
|
do {
|
|
ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
|
|
&status);
|
|
if (ret)
|
|
return ret;
|
|
} while (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
|
|
time_before(jiffies, timeout));
|
|
|
|
if (!(status & SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
|
|
dev_err(dev, "Failed to acquire the i2c bus\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
|
|
status);
|
|
}
|
|
|
|
/*
|
|
* The purpose of sii902x_i2c_bypass_deselect is to disable the pass through
|
|
* mode of the HDMI transmitter. Do not use regmap from within this function,
|
|
* only use sii902x_*_unlocked functions to read/modify/write registers.
|
|
* We are holding the parent adapter lock here, keep this in mind before
|
|
* adding more i2c transactions.
|
|
*
|
|
* Also, since SII902X_SYS_CTRL_DATA is used with regmap_update_bits elsewhere
|
|
* in this driver, we need to make sure that we only touch 0x1A[2:1] from
|
|
* within sii902x_i2c_bypass_select and sii902x_i2c_bypass_deselect, and that
|
|
* we leave the remaining bits as we have found them.
|
|
*/
|
|
static int sii902x_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
|
|
{
|
|
struct sii902x *sii902x = i2c_mux_priv(mux);
|
|
struct device *dev = &sii902x->i2c->dev;
|
|
unsigned long timeout;
|
|
unsigned int retries;
|
|
u8 status;
|
|
int ret;
|
|
|
|
/*
|
|
* When the HDMI transmitter is in pass through mode, we need an
|
|
* (undocumented) additional delay between STOP and START conditions
|
|
* to guarantee the bus won't get stuck.
|
|
*/
|
|
udelay(30);
|
|
|
|
/*
|
|
* Sometimes the I2C bus can stall after failure to use the
|
|
* EDID channel. Retry a few times to see if things clear
|
|
* up, else continue anyway.
|
|
*/
|
|
retries = 5;
|
|
do {
|
|
ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
|
|
&status);
|
|
retries--;
|
|
} while (ret && retries);
|
|
if (ret) {
|
|
dev_err(dev, "failed to read status (%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
|
|
SII902X_SYS_CTRL_DDC_BUS_REQ |
|
|
SII902X_SYS_CTRL_DDC_BUS_GRTD, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
timeout = jiffies +
|
|
msecs_to_jiffies(SII902X_I2C_BUS_ACQUISITION_TIMEOUT_MS);
|
|
do {
|
|
ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,
|
|
&status);
|
|
if (ret)
|
|
return ret;
|
|
} while (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
|
|
SII902X_SYS_CTRL_DDC_BUS_GRTD) &&
|
|
time_before(jiffies, timeout));
|
|
|
|
if (status & (SII902X_SYS_CTRL_DDC_BUS_REQ |
|
|
SII902X_SYS_CTRL_DDC_BUS_GRTD)) {
|
|
dev_err(dev, "failed to release the i2c bus\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct drm_bridge_timings default_sii902x_timings = {
|
|
.input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE
|
|
| DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
|
|
| DRM_BUS_FLAG_DE_HIGH,
|
|
};
|
|
|
|
static int sii902x_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
unsigned int status = 0;
|
|
struct sii902x *sii902x;
|
|
u8 chipid[4];
|
|
int ret;
|
|
|
|
ret = i2c_check_functionality(client->adapter,
|
|
I2C_FUNC_SMBUS_BYTE_DATA);
|
|
if (!ret) {
|
|
dev_err(dev, "I2C adapter not suitable\n");
|
|
return -EIO;
|
|
}
|
|
|
|
sii902x = devm_kzalloc(dev, sizeof(*sii902x), GFP_KERNEL);
|
|
if (!sii902x)
|
|
return -ENOMEM;
|
|
|
|
sii902x->i2c = client;
|
|
sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);
|
|
if (IS_ERR(sii902x->regmap))
|
|
return PTR_ERR(sii902x->regmap);
|
|
|
|
sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(sii902x->reset_gpio)) {
|
|
dev_err(dev, "Failed to retrieve/request reset gpio: %ld\n",
|
|
PTR_ERR(sii902x->reset_gpio));
|
|
return PTR_ERR(sii902x->reset_gpio);
|
|
}
|
|
|
|
mutex_init(&sii902x->mutex);
|
|
|
|
sii902x_reset(sii902x);
|
|
|
|
ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
|
|
&chipid, 4);
|
|
if (ret) {
|
|
dev_err(dev, "regmap_read failed %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (chipid[0] != 0xb0) {
|
|
dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
|
|
chipid[0]);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Clear all pending interrupts */
|
|
regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);
|
|
regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);
|
|
|
|
if (client->irq > 0) {
|
|
regmap_write(sii902x->regmap, SII902X_INT_ENABLE,
|
|
SII902X_HOTPLUG_EVENT);
|
|
|
|
ret = devm_request_threaded_irq(dev, client->irq, NULL,
|
|
sii902x_interrupt,
|
|
IRQF_ONESHOT, dev_name(dev),
|
|
sii902x);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
sii902x->bridge.funcs = &sii902x_bridge_funcs;
|
|
sii902x->bridge.of_node = dev->of_node;
|
|
sii902x->bridge.timings = &default_sii902x_timings;
|
|
drm_bridge_add(&sii902x->bridge);
|
|
|
|
sii902x_audio_codec_init(sii902x, dev);
|
|
|
|
i2c_set_clientdata(client, sii902x);
|
|
|
|
sii902x->i2cmux = i2c_mux_alloc(client->adapter, dev,
|
|
1, 0, I2C_MUX_GATE,
|
|
sii902x_i2c_bypass_select,
|
|
sii902x_i2c_bypass_deselect);
|
|
if (!sii902x->i2cmux)
|
|
return -ENOMEM;
|
|
|
|
sii902x->i2cmux->priv = sii902x;
|
|
return i2c_mux_add_adapter(sii902x->i2cmux, 0, 0, 0);
|
|
}
|
|
|
|
static int sii902x_remove(struct i2c_client *client)
|
|
|
|
{
|
|
struct sii902x *sii902x = i2c_get_clientdata(client);
|
|
|
|
i2c_mux_del_adapters(sii902x->i2cmux);
|
|
drm_bridge_remove(&sii902x->bridge);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sii902x_dt_ids[] = {
|
|
{ .compatible = "sil,sii9022", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sii902x_dt_ids);
|
|
|
|
static const struct i2c_device_id sii902x_i2c_ids[] = {
|
|
{ "sii9022", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, sii902x_i2c_ids);
|
|
|
|
static struct i2c_driver sii902x_driver = {
|
|
.probe = sii902x_probe,
|
|
.remove = sii902x_remove,
|
|
.driver = {
|
|
.name = "sii902x",
|
|
.of_match_table = sii902x_dt_ids,
|
|
},
|
|
.id_table = sii902x_i2c_ids,
|
|
};
|
|
module_i2c_driver(sii902x_driver);
|
|
|
|
MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
|
|
MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");
|
|
MODULE_LICENSE("GPL");
|