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linux_dsm_epyc7002/drivers/gpu/drm/i2c/tda998x_drv.c
Russell King fcc22c5f9d drm/i2c: tda998x: improve correctness of quantisation range 
CEA-861 says: "A Source shall not send a non-zero Q value that does
not correspond to the default RGB Quantization Range for the
transmitted Picture unless the Sink indicates support for the Q bit
in a Video Capabilities Data Block."

Make TDA998x compliant by using the helper to set the quantisation
range in the infoframe, and using the TDA998x's colour scaling to
appropriately adjust the RGB values sent to the monitor.

This ensures that monitors that do not support the Q bit are sent
RGB values that are within the expected range.  Monitors with
support for the Q bit will be sent full-range RGB.

Reviewed-by: Brian Starkey <brian.starkey@arm.com>
Tested-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2019-06-13 21:55:07 +01:00

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/*
* Copyright (C) 2012 Texas Instruments
* Author: Rob Clark <robdclark@gmail.com>
*
* 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.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/component.h>
#include <linux/gpio/consumer.h>
#include <linux/hdmi.h>
#include <linux/module.h>
#include <linux/platform_data/tda9950.h>
#include <linux/irq.h>
#include <sound/asoundef.h>
#include <sound/hdmi-codec.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/i2c/tda998x.h>
#include <media/cec-notifier.h>
#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
enum {
AUDIO_ROUTE_I2S,
AUDIO_ROUTE_SPDIF,
AUDIO_ROUTE_NUM
};
struct tda998x_audio_route {
u8 ena_aclk;
u8 mux_ap;
u8 aip_clksel;
};
struct tda998x_audio_settings {
const struct tda998x_audio_route *route;
struct hdmi_audio_infoframe cea;
unsigned int sample_rate;
u8 status[5];
u8 ena_ap;
u8 i2s_format;
u8 cts_n;
};
struct tda998x_priv {
struct i2c_client *cec;
struct i2c_client *hdmi;
struct mutex mutex;
u16 rev;
u8 cec_addr;
u8 current_page;
bool is_on;
bool supports_infoframes;
bool sink_has_audio;
enum hdmi_quantization_range rgb_quant_range;
u8 vip_cntrl_0;
u8 vip_cntrl_1;
u8 vip_cntrl_2;
unsigned long tmds_clock;
struct tda998x_audio_settings audio;
struct platform_device *audio_pdev;
struct mutex audio_mutex;
struct mutex edid_mutex;
wait_queue_head_t wq_edid;
volatile int wq_edid_wait;
struct work_struct detect_work;
struct timer_list edid_delay_timer;
wait_queue_head_t edid_delay_waitq;
bool edid_delay_active;
struct drm_encoder encoder;
struct drm_bridge bridge;
struct drm_connector connector;
u8 audio_port_enable[AUDIO_ROUTE_NUM];
struct tda9950_glue cec_glue;
struct gpio_desc *calib;
struct cec_notifier *cec_notify;
};
#define conn_to_tda998x_priv(x) \
container_of(x, struct tda998x_priv, connector)
#define enc_to_tda998x_priv(x) \
container_of(x, struct tda998x_priv, encoder)
#define bridge_to_tda998x_priv(x) \
container_of(x, struct tda998x_priv, bridge)
/* The TDA9988 series of devices use a paged register scheme.. to simplify
* things we encode the page # in upper bits of the register #. To read/
* write a given register, we need to make sure CURPAGE register is set
* appropriately. Which implies reads/writes are not atomic. Fun!
*/
#define REG(page, addr) (((page) << 8) | (addr))
#define REG2ADDR(reg) ((reg) & 0xff)
#define REG2PAGE(reg) (((reg) >> 8) & 0xff)
#define REG_CURPAGE 0xff /* write */
/* Page 00h: General Control */
#define REG_VERSION_LSB REG(0x00, 0x00) /* read */
#define REG_MAIN_CNTRL0 REG(0x00, 0x01) /* read/write */
# define MAIN_CNTRL0_SR (1 << 0)
# define MAIN_CNTRL0_DECS (1 << 1)
# define MAIN_CNTRL0_DEHS (1 << 2)
# define MAIN_CNTRL0_CECS (1 << 3)
# define MAIN_CNTRL0_CEHS (1 << 4)
# define MAIN_CNTRL0_SCALER (1 << 7)
#define REG_VERSION_MSB REG(0x00, 0x02) /* read */
#define REG_SOFTRESET REG(0x00, 0x0a) /* write */
# define SOFTRESET_AUDIO (1 << 0)
# define SOFTRESET_I2C_MASTER (1 << 1)
#define REG_DDC_DISABLE REG(0x00, 0x0b) /* read/write */
#define REG_CCLK_ON REG(0x00, 0x0c) /* read/write */
#define REG_I2C_MASTER REG(0x00, 0x0d) /* read/write */
# define I2C_MASTER_DIS_MM (1 << 0)
# define I2C_MASTER_DIS_FILT (1 << 1)
# define I2C_MASTER_APP_STRT_LAT (1 << 2)
#define REG_FEAT_POWERDOWN REG(0x00, 0x0e) /* read/write */
# define FEAT_POWERDOWN_PREFILT BIT(0)
# define FEAT_POWERDOWN_CSC BIT(1)
# define FEAT_POWERDOWN_SPDIF (1 << 3)
#define REG_INT_FLAGS_0 REG(0x00, 0x0f) /* read/write */
#define REG_INT_FLAGS_1 REG(0x00, 0x10) /* read/write */
#define REG_INT_FLAGS_2 REG(0x00, 0x11) /* read/write */
# define INT_FLAGS_2_EDID_BLK_RD (1 << 1)
#define REG_ENA_ACLK REG(0x00, 0x16) /* read/write */
#define REG_ENA_VP_0 REG(0x00, 0x18) /* read/write */
#define REG_ENA_VP_1 REG(0x00, 0x19) /* read/write */
#define REG_ENA_VP_2 REG(0x00, 0x1a) /* read/write */
#define REG_ENA_AP REG(0x00, 0x1e) /* read/write */
#define REG_VIP_CNTRL_0 REG(0x00, 0x20) /* write */
# define VIP_CNTRL_0_MIRR_A (1 << 7)
# define VIP_CNTRL_0_SWAP_A(x) (((x) & 7) << 4)
# define VIP_CNTRL_0_MIRR_B (1 << 3)
# define VIP_CNTRL_0_SWAP_B(x) (((x) & 7) << 0)
#define REG_VIP_CNTRL_1 REG(0x00, 0x21) /* write */
# define VIP_CNTRL_1_MIRR_C (1 << 7)
# define VIP_CNTRL_1_SWAP_C(x) (((x) & 7) << 4)
# define VIP_CNTRL_1_MIRR_D (1 << 3)
# define VIP_CNTRL_1_SWAP_D(x) (((x) & 7) << 0)
#define REG_VIP_CNTRL_2 REG(0x00, 0x22) /* write */
# define VIP_CNTRL_2_MIRR_E (1 << 7)
# define VIP_CNTRL_2_SWAP_E(x) (((x) & 7) << 4)
# define VIP_CNTRL_2_MIRR_F (1 << 3)
# define VIP_CNTRL_2_SWAP_F(x) (((x) & 7) << 0)
#define REG_VIP_CNTRL_3 REG(0x00, 0x23) /* write */
# define VIP_CNTRL_3_X_TGL (1 << 0)
# define VIP_CNTRL_3_H_TGL (1 << 1)
# define VIP_CNTRL_3_V_TGL (1 << 2)
# define VIP_CNTRL_3_EMB (1 << 3)
# define VIP_CNTRL_3_SYNC_DE (1 << 4)
# define VIP_CNTRL_3_SYNC_HS (1 << 5)
# define VIP_CNTRL_3_DE_INT (1 << 6)
# define VIP_CNTRL_3_EDGE (1 << 7)
#define REG_VIP_CNTRL_4 REG(0x00, 0x24) /* write */
# define VIP_CNTRL_4_BLC(x) (((x) & 3) << 0)
# define VIP_CNTRL_4_BLANKIT(x) (((x) & 3) << 2)
# define VIP_CNTRL_4_CCIR656 (1 << 4)
# define VIP_CNTRL_4_656_ALT (1 << 5)
# define VIP_CNTRL_4_TST_656 (1 << 6)
# define VIP_CNTRL_4_TST_PAT (1 << 7)
#define REG_VIP_CNTRL_5 REG(0x00, 0x25) /* write */
# define VIP_CNTRL_5_CKCASE (1 << 0)
# define VIP_CNTRL_5_SP_CNT(x) (((x) & 3) << 1)
#define REG_MUX_AP REG(0x00, 0x26) /* read/write */
# define MUX_AP_SELECT_I2S 0x64
# define MUX_AP_SELECT_SPDIF 0x40
#define REG_MUX_VP_VIP_OUT REG(0x00, 0x27) /* read/write */
#define REG_MAT_CONTRL REG(0x00, 0x80) /* write */
# define MAT_CONTRL_MAT_SC(x) (((x) & 3) << 0)
# define MAT_CONTRL_MAT_BP (1 << 2)
#define REG_VIDFORMAT REG(0x00, 0xa0) /* write */
#define REG_REFPIX_MSB REG(0x00, 0xa1) /* write */
#define REG_REFPIX_LSB REG(0x00, 0xa2) /* write */
#define REG_REFLINE_MSB REG(0x00, 0xa3) /* write */
#define REG_REFLINE_LSB REG(0x00, 0xa4) /* write */
#define REG_NPIX_MSB REG(0x00, 0xa5) /* write */
#define REG_NPIX_LSB REG(0x00, 0xa6) /* write */
#define REG_NLINE_MSB REG(0x00, 0xa7) /* write */
#define REG_NLINE_LSB REG(0x00, 0xa8) /* write */
#define REG_VS_LINE_STRT_1_MSB REG(0x00, 0xa9) /* write */
#define REG_VS_LINE_STRT_1_LSB REG(0x00, 0xaa) /* write */
#define REG_VS_PIX_STRT_1_MSB REG(0x00, 0xab) /* write */
#define REG_VS_PIX_STRT_1_LSB REG(0x00, 0xac) /* write */
#define REG_VS_LINE_END_1_MSB REG(0x00, 0xad) /* write */
#define REG_VS_LINE_END_1_LSB REG(0x00, 0xae) /* write */
#define REG_VS_PIX_END_1_MSB REG(0x00, 0xaf) /* write */
#define REG_VS_PIX_END_1_LSB REG(0x00, 0xb0) /* write */
#define REG_VS_LINE_STRT_2_MSB REG(0x00, 0xb1) /* write */
#define REG_VS_LINE_STRT_2_LSB REG(0x00, 0xb2) /* write */
#define REG_VS_PIX_STRT_2_MSB REG(0x00, 0xb3) /* write */
#define REG_VS_PIX_STRT_2_LSB REG(0x00, 0xb4) /* write */
#define REG_VS_LINE_END_2_MSB REG(0x00, 0xb5) /* write */
#define REG_VS_LINE_END_2_LSB REG(0x00, 0xb6) /* write */
#define REG_VS_PIX_END_2_MSB REG(0x00, 0xb7) /* write */
#define REG_VS_PIX_END_2_LSB REG(0x00, 0xb8) /* write */
#define REG_HS_PIX_START_MSB REG(0x00, 0xb9) /* write */
#define REG_HS_PIX_START_LSB REG(0x00, 0xba) /* write */
#define REG_HS_PIX_STOP_MSB REG(0x00, 0xbb) /* write */
#define REG_HS_PIX_STOP_LSB REG(0x00, 0xbc) /* write */
#define REG_VWIN_START_1_MSB REG(0x00, 0xbd) /* write */
#define REG_VWIN_START_1_LSB REG(0x00, 0xbe) /* write */
#define REG_VWIN_END_1_MSB REG(0x00, 0xbf) /* write */
#define REG_VWIN_END_1_LSB REG(0x00, 0xc0) /* write */
#define REG_VWIN_START_2_MSB REG(0x00, 0xc1) /* write */
#define REG_VWIN_START_2_LSB REG(0x00, 0xc2) /* write */
#define REG_VWIN_END_2_MSB REG(0x00, 0xc3) /* write */
#define REG_VWIN_END_2_LSB REG(0x00, 0xc4) /* write */
#define REG_DE_START_MSB REG(0x00, 0xc5) /* write */
#define REG_DE_START_LSB REG(0x00, 0xc6) /* write */
#define REG_DE_STOP_MSB REG(0x00, 0xc7) /* write */
#define REG_DE_STOP_LSB REG(0x00, 0xc8) /* write */
#define REG_TBG_CNTRL_0 REG(0x00, 0xca) /* write */
# define TBG_CNTRL_0_TOP_TGL (1 << 0)
# define TBG_CNTRL_0_TOP_SEL (1 << 1)
# define TBG_CNTRL_0_DE_EXT (1 << 2)
# define TBG_CNTRL_0_TOP_EXT (1 << 3)
# define TBG_CNTRL_0_FRAME_DIS (1 << 5)
# define TBG_CNTRL_0_SYNC_MTHD (1 << 6)
# define TBG_CNTRL_0_SYNC_ONCE (1 << 7)
#define REG_TBG_CNTRL_1 REG(0x00, 0xcb) /* write */
# define TBG_CNTRL_1_H_TGL (1 << 0)
# define TBG_CNTRL_1_V_TGL (1 << 1)
# define TBG_CNTRL_1_TGL_EN (1 << 2)
# define TBG_CNTRL_1_X_EXT (1 << 3)
# define TBG_CNTRL_1_H_EXT (1 << 4)
# define TBG_CNTRL_1_V_EXT (1 << 5)
# define TBG_CNTRL_1_DWIN_DIS (1 << 6)
#define REG_ENABLE_SPACE REG(0x00, 0xd6) /* write */
#define REG_HVF_CNTRL_0 REG(0x00, 0xe4) /* write */
# define HVF_CNTRL_0_SM (1 << 7)
# define HVF_CNTRL_0_RWB (1 << 6)
# define HVF_CNTRL_0_PREFIL(x) (((x) & 3) << 2)
# define HVF_CNTRL_0_INTPOL(x) (((x) & 3) << 0)
#define REG_HVF_CNTRL_1 REG(0x00, 0xe5) /* write */
# define HVF_CNTRL_1_FOR (1 << 0)
# define HVF_CNTRL_1_YUVBLK (1 << 1)
# define HVF_CNTRL_1_VQR(x) (((x) & 3) << 2)
# define HVF_CNTRL_1_PAD(x) (((x) & 3) << 4)
# define HVF_CNTRL_1_SEMI_PLANAR (1 << 6)
#define REG_RPT_CNTRL REG(0x00, 0xf0) /* write */
# define RPT_CNTRL_REPEAT(x) ((x) & 15)
#define REG_I2S_FORMAT REG(0x00, 0xfc) /* read/write */
# define I2S_FORMAT_PHILIPS (0 << 0)
# define I2S_FORMAT_LEFT_J (2 << 0)
# define I2S_FORMAT_RIGHT_J (3 << 0)
#define REG_AIP_CLKSEL REG(0x00, 0xfd) /* write */
# define AIP_CLKSEL_AIP_SPDIF (0 << 3)
# define AIP_CLKSEL_AIP_I2S (1 << 3)
# define AIP_CLKSEL_FS_ACLK (0 << 0)
# define AIP_CLKSEL_FS_MCLK (1 << 0)
# define AIP_CLKSEL_FS_FS64SPDIF (2 << 0)
/* Page 02h: PLL settings */
#define REG_PLL_SERIAL_1 REG(0x02, 0x00) /* read/write */
# define PLL_SERIAL_1_SRL_FDN (1 << 0)
# define PLL_SERIAL_1_SRL_IZ(x) (((x) & 3) << 1)
# define PLL_SERIAL_1_SRL_MAN_IZ (1 << 6)
#define REG_PLL_SERIAL_2 REG(0x02, 0x01) /* read/write */
# define PLL_SERIAL_2_SRL_NOSC(x) ((x) << 0)
# define PLL_SERIAL_2_SRL_PR(x) (((x) & 0xf) << 4)
#define REG_PLL_SERIAL_3 REG(0x02, 0x02) /* read/write */
# define PLL_SERIAL_3_SRL_CCIR (1 << 0)
# define PLL_SERIAL_3_SRL_DE (1 << 2)
# define PLL_SERIAL_3_SRL_PXIN_SEL (1 << 4)
#define REG_SERIALIZER REG(0x02, 0x03) /* read/write */
#define REG_BUFFER_OUT REG(0x02, 0x04) /* read/write */
#define REG_PLL_SCG1 REG(0x02, 0x05) /* read/write */
#define REG_PLL_SCG2 REG(0x02, 0x06) /* read/write */
#define REG_PLL_SCGN1 REG(0x02, 0x07) /* read/write */
#define REG_PLL_SCGN2 REG(0x02, 0x08) /* read/write */
#define REG_PLL_SCGR1 REG(0x02, 0x09) /* read/write */
#define REG_PLL_SCGR2 REG(0x02, 0x0a) /* read/write */
#define REG_AUDIO_DIV REG(0x02, 0x0e) /* read/write */
# define AUDIO_DIV_SERCLK_1 0
# define AUDIO_DIV_SERCLK_2 1
# define AUDIO_DIV_SERCLK_4 2
# define AUDIO_DIV_SERCLK_8 3
# define AUDIO_DIV_SERCLK_16 4
# define AUDIO_DIV_SERCLK_32 5
#define REG_SEL_CLK REG(0x02, 0x11) /* read/write */
# define SEL_CLK_SEL_CLK1 (1 << 0)
# define SEL_CLK_SEL_VRF_CLK(x) (((x) & 3) << 1)
# define SEL_CLK_ENA_SC_CLK (1 << 3)
#define REG_ANA_GENERAL REG(0x02, 0x12) /* read/write */
/* Page 09h: EDID Control */
#define REG_EDID_DATA_0 REG(0x09, 0x00) /* read */
/* next 127 successive registers are the EDID block */
#define REG_EDID_CTRL REG(0x09, 0xfa) /* read/write */
#define REG_DDC_ADDR REG(0x09, 0xfb) /* read/write */
#define REG_DDC_OFFS REG(0x09, 0xfc) /* read/write */
#define REG_DDC_SEGM_ADDR REG(0x09, 0xfd) /* read/write */
#define REG_DDC_SEGM REG(0x09, 0xfe) /* read/write */
/* Page 10h: information frames and packets */
#define REG_IF1_HB0 REG(0x10, 0x20) /* read/write */
#define REG_IF2_HB0 REG(0x10, 0x40) /* read/write */
#define REG_IF3_HB0 REG(0x10, 0x60) /* read/write */
#define REG_IF4_HB0 REG(0x10, 0x80) /* read/write */
#define REG_IF5_HB0 REG(0x10, 0xa0) /* read/write */
/* Page 11h: audio settings and content info packets */
#define REG_AIP_CNTRL_0 REG(0x11, 0x00) /* read/write */
# define AIP_CNTRL_0_RST_FIFO (1 << 0)
# define AIP_CNTRL_0_SWAP (1 << 1)
# define AIP_CNTRL_0_LAYOUT (1 << 2)
# define AIP_CNTRL_0_ACR_MAN (1 << 5)
# define AIP_CNTRL_0_RST_CTS (1 << 6)
#define REG_CA_I2S REG(0x11, 0x01) /* read/write */
# define CA_I2S_CA_I2S(x) (((x) & 31) << 0)
# define CA_I2S_HBR_CHSTAT (1 << 6)
#define REG_LATENCY_RD REG(0x11, 0x04) /* read/write */
#define REG_ACR_CTS_0 REG(0x11, 0x05) /* read/write */
#define REG_ACR_CTS_1 REG(0x11, 0x06) /* read/write */
#define REG_ACR_CTS_2 REG(0x11, 0x07) /* read/write */
#define REG_ACR_N_0 REG(0x11, 0x08) /* read/write */
#define REG_ACR_N_1 REG(0x11, 0x09) /* read/write */
#define REG_ACR_N_2 REG(0x11, 0x0a) /* read/write */
#define REG_CTS_N REG(0x11, 0x0c) /* read/write */
# define CTS_N_K(x) (((x) & 7) << 0)
# define CTS_N_M(x) (((x) & 3) << 4)
#define REG_ENC_CNTRL REG(0x11, 0x0d) /* read/write */
# define ENC_CNTRL_RST_ENC (1 << 0)
# define ENC_CNTRL_RST_SEL (1 << 1)
# define ENC_CNTRL_CTL_CODE(x) (((x) & 3) << 2)
#define REG_DIP_FLAGS REG(0x11, 0x0e) /* read/write */
# define DIP_FLAGS_ACR (1 << 0)
# define DIP_FLAGS_GC (1 << 1)
#define REG_DIP_IF_FLAGS REG(0x11, 0x0f) /* read/write */
# define DIP_IF_FLAGS_IF1 (1 << 1)
# define DIP_IF_FLAGS_IF2 (1 << 2)
# define DIP_IF_FLAGS_IF3 (1 << 3)
# define DIP_IF_FLAGS_IF4 (1 << 4)
# define DIP_IF_FLAGS_IF5 (1 << 5)
#define REG_CH_STAT_B(x) REG(0x11, 0x14 + (x)) /* read/write */
/* Page 12h: HDCP and OTP */
#define REG_TX3 REG(0x12, 0x9a) /* read/write */
#define REG_TX4 REG(0x12, 0x9b) /* read/write */
# define TX4_PD_RAM (1 << 1)
#define REG_TX33 REG(0x12, 0xb8) /* read/write */
# define TX33_HDMI (1 << 1)
/* Page 13h: Gamut related metadata packets */
/* CEC registers: (not paged)
*/
#define REG_CEC_INTSTATUS 0xee /* read */
# define CEC_INTSTATUS_CEC (1 << 0)
# define CEC_INTSTATUS_HDMI (1 << 1)
#define REG_CEC_CAL_XOSC_CTRL1 0xf2
# define CEC_CAL_XOSC_CTRL1_ENA_CAL BIT(0)
#define REG_CEC_DES_FREQ2 0xf5
# define CEC_DES_FREQ2_DIS_AUTOCAL BIT(7)
#define REG_CEC_CLK 0xf6
# define CEC_CLK_FRO 0x11
#define REG_CEC_FRO_IM_CLK_CTRL 0xfb /* read/write */
# define CEC_FRO_IM_CLK_CTRL_GHOST_DIS (1 << 7)
# define CEC_FRO_IM_CLK_CTRL_ENA_OTP (1 << 6)
# define CEC_FRO_IM_CLK_CTRL_IMCLK_SEL (1 << 1)
# define CEC_FRO_IM_CLK_CTRL_FRO_DIV (1 << 0)
#define REG_CEC_RXSHPDINTENA 0xfc /* read/write */
#define REG_CEC_RXSHPDINT 0xfd /* read */
# define CEC_RXSHPDINT_RXSENS BIT(0)
# define CEC_RXSHPDINT_HPD BIT(1)
#define REG_CEC_RXSHPDLEV 0xfe /* read */
# define CEC_RXSHPDLEV_RXSENS (1 << 0)
# define CEC_RXSHPDLEV_HPD (1 << 1)
#define REG_CEC_ENAMODS 0xff /* read/write */
# define CEC_ENAMODS_EN_CEC_CLK (1 << 7)
# define CEC_ENAMODS_DIS_FRO (1 << 6)
# define CEC_ENAMODS_DIS_CCLK (1 << 5)
# define CEC_ENAMODS_EN_RXSENS (1 << 2)
# define CEC_ENAMODS_EN_HDMI (1 << 1)
# define CEC_ENAMODS_EN_CEC (1 << 0)
/* Device versions: */
#define TDA9989N2 0x0101
#define TDA19989 0x0201
#define TDA19989N2 0x0202
#define TDA19988 0x0301
static void
cec_write(struct tda998x_priv *priv, u16 addr, u8 val)
{
u8 buf[] = {addr, val};
struct i2c_msg msg = {
.addr = priv->cec_addr,
.len = 2,
.buf = buf,
};
int ret;
ret = i2c_transfer(priv->hdmi->adapter, &msg, 1);
if (ret < 0)
dev_err(&priv->hdmi->dev, "Error %d writing to cec:0x%x\n",
ret, addr);
}
static u8
cec_read(struct tda998x_priv *priv, u8 addr)
{
u8 val;
struct i2c_msg msg[2] = {
{
.addr = priv->cec_addr,
.len = 1,
.buf = &addr,
}, {
.addr = priv->cec_addr,
.flags = I2C_M_RD,
.len = 1,
.buf = &val,
},
};
int ret;
ret = i2c_transfer(priv->hdmi->adapter, msg, ARRAY_SIZE(msg));
if (ret < 0) {
dev_err(&priv->hdmi->dev, "Error %d reading from cec:0x%x\n",
ret, addr);
val = 0;
}
return val;
}
static void cec_enamods(struct tda998x_priv *priv, u8 mods, bool enable)
{
int val = cec_read(priv, REG_CEC_ENAMODS);
if (val < 0)
return;
if (enable)
val |= mods;
else
val &= ~mods;
cec_write(priv, REG_CEC_ENAMODS, val);
}
static void tda998x_cec_set_calibration(struct tda998x_priv *priv, bool enable)
{
if (enable) {
u8 val;
cec_write(priv, 0xf3, 0xc0);
cec_write(priv, 0xf4, 0xd4);
/* Enable automatic calibration mode */
val = cec_read(priv, REG_CEC_DES_FREQ2);
val &= ~CEC_DES_FREQ2_DIS_AUTOCAL;
cec_write(priv, REG_CEC_DES_FREQ2, val);
/* Enable free running oscillator */
cec_write(priv, REG_CEC_CLK, CEC_CLK_FRO);
cec_enamods(priv, CEC_ENAMODS_DIS_FRO, false);
cec_write(priv, REG_CEC_CAL_XOSC_CTRL1,
CEC_CAL_XOSC_CTRL1_ENA_CAL);
} else {
cec_write(priv, REG_CEC_CAL_XOSC_CTRL1, 0);
}
}
/*
* Calibration for the internal oscillator: we need to set calibration mode,
* and then pulse the IRQ line low for a 10ms ± 1% period.
*/
static void tda998x_cec_calibration(struct tda998x_priv *priv)
{
struct gpio_desc *calib = priv->calib;
mutex_lock(&priv->edid_mutex);
if (priv->hdmi->irq > 0)
disable_irq(priv->hdmi->irq);
gpiod_direction_output(calib, 1);
tda998x_cec_set_calibration(priv, true);
local_irq_disable();
gpiod_set_value(calib, 0);
mdelay(10);
gpiod_set_value(calib, 1);
local_irq_enable();
tda998x_cec_set_calibration(priv, false);
gpiod_direction_input(calib);
if (priv->hdmi->irq > 0)
enable_irq(priv->hdmi->irq);
mutex_unlock(&priv->edid_mutex);
}
static int tda998x_cec_hook_init(void *data)
{
struct tda998x_priv *priv = data;
struct gpio_desc *calib;
calib = gpiod_get(&priv->hdmi->dev, "nxp,calib", GPIOD_ASIS);
if (IS_ERR(calib)) {
dev_warn(&priv->hdmi->dev, "failed to get calibration gpio: %ld\n",
PTR_ERR(calib));
return PTR_ERR(calib);
}
priv->calib = calib;
return 0;
}
static void tda998x_cec_hook_exit(void *data)
{
struct tda998x_priv *priv = data;
gpiod_put(priv->calib);
priv->calib = NULL;
}
static int tda998x_cec_hook_open(void *data)
{
struct tda998x_priv *priv = data;
cec_enamods(priv, CEC_ENAMODS_EN_CEC_CLK | CEC_ENAMODS_EN_CEC, true);
tda998x_cec_calibration(priv);
return 0;
}
static void tda998x_cec_hook_release(void *data)
{
struct tda998x_priv *priv = data;
cec_enamods(priv, CEC_ENAMODS_EN_CEC_CLK | CEC_ENAMODS_EN_CEC, false);
}
static int
set_page(struct tda998x_priv *priv, u16 reg)
{
if (REG2PAGE(reg) != priv->current_page) {
struct i2c_client *client = priv->hdmi;
u8 buf[] = {
REG_CURPAGE, REG2PAGE(reg)
};
int ret = i2c_master_send(client, buf, sizeof(buf));
if (ret < 0) {
dev_err(&client->dev, "%s %04x err %d\n", __func__,
reg, ret);
return ret;
}
priv->current_page = REG2PAGE(reg);
}
return 0;
}
static int
reg_read_range(struct tda998x_priv *priv, u16 reg, char *buf, int cnt)
{
struct i2c_client *client = priv->hdmi;
u8 addr = REG2ADDR(reg);
int ret;
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, &addr, sizeof(addr));
if (ret < 0)
goto fail;
ret = i2c_master_recv(client, buf, cnt);
if (ret < 0)
goto fail;
goto out;
fail:
dev_err(&client->dev, "Error %d reading from 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
return ret;
}
#define MAX_WRITE_RANGE_BUF 32
static void
reg_write_range(struct tda998x_priv *priv, u16 reg, u8 *p, int cnt)
{
struct i2c_client *client = priv->hdmi;
/* This is the maximum size of the buffer passed in */
u8 buf[MAX_WRITE_RANGE_BUF + 1];
int ret;
if (cnt > MAX_WRITE_RANGE_BUF) {
dev_err(&client->dev, "Fixed write buffer too small (%d)\n",
MAX_WRITE_RANGE_BUF);
return;
}
buf[0] = REG2ADDR(reg);
memcpy(&buf[1], p, cnt);
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, buf, cnt + 1);
if (ret < 0)
dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
}
static int
reg_read(struct tda998x_priv *priv, u16 reg)
{
u8 val = 0;
int ret;
ret = reg_read_range(priv, reg, &val, sizeof(val));
if (ret < 0)
return ret;
return val;
}
static void
reg_write(struct tda998x_priv *priv, u16 reg, u8 val)
{
struct i2c_client *client = priv->hdmi;
u8 buf[] = {REG2ADDR(reg), val};
int ret;
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, buf, sizeof(buf));
if (ret < 0)
dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
}
static void
reg_write16(struct tda998x_priv *priv, u16 reg, u16 val)
{
struct i2c_client *client = priv->hdmi;
u8 buf[] = {REG2ADDR(reg), val >> 8, val};
int ret;
mutex_lock(&priv->mutex);
ret = set_page(priv, reg);
if (ret < 0)
goto out;
ret = i2c_master_send(client, buf, sizeof(buf));
if (ret < 0)
dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
out:
mutex_unlock(&priv->mutex);
}
static void
reg_set(struct tda998x_priv *priv, u16 reg, u8 val)
{
int old_val;
old_val = reg_read(priv, reg);
if (old_val >= 0)
reg_write(priv, reg, old_val | val);
}
static void
reg_clear(struct tda998x_priv *priv, u16 reg, u8 val)
{
int old_val;
old_val = reg_read(priv, reg);
if (old_val >= 0)
reg_write(priv, reg, old_val & ~val);
}
static void
tda998x_reset(struct tda998x_priv *priv)
{
/* reset audio and i2c master: */
reg_write(priv, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
msleep(50);
reg_write(priv, REG_SOFTRESET, 0);
msleep(50);
/* reset transmitter: */
reg_set(priv, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
reg_clear(priv, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
/* PLL registers common configuration */
reg_write(priv, REG_PLL_SERIAL_1, 0x00);
reg_write(priv, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(1));
reg_write(priv, REG_PLL_SERIAL_3, 0x00);
reg_write(priv, REG_SERIALIZER, 0x00);
reg_write(priv, REG_BUFFER_OUT, 0x00);
reg_write(priv, REG_PLL_SCG1, 0x00);
reg_write(priv, REG_AUDIO_DIV, AUDIO_DIV_SERCLK_8);
reg_write(priv, REG_SEL_CLK, SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
reg_write(priv, REG_PLL_SCGN1, 0xfa);
reg_write(priv, REG_PLL_SCGN2, 0x00);
reg_write(priv, REG_PLL_SCGR1, 0x5b);
reg_write(priv, REG_PLL_SCGR2, 0x00);
reg_write(priv, REG_PLL_SCG2, 0x10);
/* Write the default value MUX register */
reg_write(priv, REG_MUX_VP_VIP_OUT, 0x24);
}
/*
* The TDA998x has a problem when trying to read the EDID close to a
* HPD assertion: it needs a delay of 100ms to avoid timing out while
* trying to read EDID data.
*
* However, tda998x_connector_get_modes() may be called at any moment
* after tda998x_connector_detect() indicates that we are connected, so
* we need to delay probing modes in tda998x_connector_get_modes() after
* we have seen a HPD inactive->active transition. This code implements
* that delay.
*/
static void tda998x_edid_delay_done(struct timer_list *t)
{
struct tda998x_priv *priv = from_timer(priv, t, edid_delay_timer);
priv->edid_delay_active = false;
wake_up(&priv->edid_delay_waitq);
schedule_work(&priv->detect_work);
}
static void tda998x_edid_delay_start(struct tda998x_priv *priv)
{
priv->edid_delay_active = true;
mod_timer(&priv->edid_delay_timer, jiffies + HZ/10);
}
static int tda998x_edid_delay_wait(struct tda998x_priv *priv)
{
return wait_event_killable(priv->edid_delay_waitq, !priv->edid_delay_active);
}
/*
* We need to run the KMS hotplug event helper outside of our threaded
* interrupt routine as this can call back into our get_modes method,
* which will want to make use of interrupts.
*/
static void tda998x_detect_work(struct work_struct *work)
{
struct tda998x_priv *priv =
container_of(work, struct tda998x_priv, detect_work);
struct drm_device *dev = priv->connector.dev;
if (dev)
drm_kms_helper_hotplug_event(dev);
}
/*
* only 2 interrupts may occur: screen plug/unplug and EDID read
*/
static irqreturn_t tda998x_irq_thread(int irq, void *data)
{
struct tda998x_priv *priv = data;
u8 sta, cec, lvl, flag0, flag1, flag2;
bool handled = false;
sta = cec_read(priv, REG_CEC_INTSTATUS);
if (sta & CEC_INTSTATUS_HDMI) {
cec = cec_read(priv, REG_CEC_RXSHPDINT);
lvl = cec_read(priv, REG_CEC_RXSHPDLEV);
flag0 = reg_read(priv, REG_INT_FLAGS_0);
flag1 = reg_read(priv, REG_INT_FLAGS_1);
flag2 = reg_read(priv, REG_INT_FLAGS_2);
DRM_DEBUG_DRIVER(
"tda irq sta %02x cec %02x lvl %02x f0 %02x f1 %02x f2 %02x\n",
sta, cec, lvl, flag0, flag1, flag2);
if (cec & CEC_RXSHPDINT_HPD) {
if (lvl & CEC_RXSHPDLEV_HPD) {
tda998x_edid_delay_start(priv);
} else {
schedule_work(&priv->detect_work);
cec_notifier_set_phys_addr(priv->cec_notify,
CEC_PHYS_ADDR_INVALID);
}
handled = true;
}
if ((flag2 & INT_FLAGS_2_EDID_BLK_RD) && priv->wq_edid_wait) {
priv->wq_edid_wait = 0;
wake_up(&priv->wq_edid);
handled = true;
}
}
return IRQ_RETVAL(handled);
}
static void
tda998x_write_if(struct tda998x_priv *priv, u8 bit, u16 addr,
union hdmi_infoframe *frame)
{
u8 buf[MAX_WRITE_RANGE_BUF];
ssize_t len;
len = hdmi_infoframe_pack(frame, buf, sizeof(buf));
if (len < 0) {
dev_err(&priv->hdmi->dev,
"hdmi_infoframe_pack() type=0x%02x failed: %zd\n",
frame->any.type, len);
return;
}
reg_clear(priv, REG_DIP_IF_FLAGS, bit);
reg_write_range(priv, addr, buf, len);
reg_set(priv, REG_DIP_IF_FLAGS, bit);
}
static void tda998x_write_aif(struct tda998x_priv *priv,
const struct hdmi_audio_infoframe *cea)
{
union hdmi_infoframe frame;
frame.audio = *cea;
tda998x_write_if(priv, DIP_IF_FLAGS_IF4, REG_IF4_HB0, &frame);
}
static void
tda998x_write_avi(struct tda998x_priv *priv, const struct drm_display_mode *mode)
{
union hdmi_infoframe frame;
drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
&priv->connector, mode);
frame.avi.quantization_range = HDMI_QUANTIZATION_RANGE_FULL;
drm_hdmi_avi_infoframe_quant_range(&frame.avi, &priv->connector, mode,
priv->rgb_quant_range);
tda998x_write_if(priv, DIP_IF_FLAGS_IF2, REG_IF2_HB0, &frame);
}
/* Audio support */
static const struct tda998x_audio_route tda998x_audio_route[AUDIO_ROUTE_NUM] = {
[AUDIO_ROUTE_I2S] = {
.ena_aclk = 1,
.mux_ap = MUX_AP_SELECT_I2S,
.aip_clksel = AIP_CLKSEL_AIP_I2S | AIP_CLKSEL_FS_ACLK,
},
[AUDIO_ROUTE_SPDIF] = {
.ena_aclk = 0,
.mux_ap = MUX_AP_SELECT_SPDIF,
.aip_clksel = AIP_CLKSEL_AIP_SPDIF | AIP_CLKSEL_FS_FS64SPDIF,
},
};
/* Configure the TDA998x audio data and clock routing. */
static int tda998x_derive_routing(struct tda998x_priv *priv,
struct tda998x_audio_settings *s,
unsigned int route)
{
s->route = &tda998x_audio_route[route];
s->ena_ap = priv->audio_port_enable[route];
if (s->ena_ap == 0) {
dev_err(&priv->hdmi->dev, "no audio configuration found\n");
return -EINVAL;
}
return 0;
}
/*
* The audio clock divisor register controls a divider producing Audio_Clk_Out
* from SERclk by dividing it by 2^n where 0 <= n <= 5. We don't know what
* Audio_Clk_Out or SERclk are. We guess SERclk is the same as TMDS clock.
*
* It seems that Audio_Clk_Out must be the smallest value that is greater
* than 128*fs, otherwise audio does not function. There is some suggestion
* that 126*fs is a better value.
*/
static u8 tda998x_get_adiv(struct tda998x_priv *priv, unsigned int fs)
{
unsigned long min_audio_clk = fs * 128;
unsigned long ser_clk = priv->tmds_clock * 1000;
u8 adiv;
for (adiv = AUDIO_DIV_SERCLK_32; adiv != AUDIO_DIV_SERCLK_1; adiv--)
if (ser_clk > min_audio_clk << adiv)
break;
dev_dbg(&priv->hdmi->dev,
"ser_clk=%luHz fs=%uHz min_aclk=%luHz adiv=%d\n",
ser_clk, fs, min_audio_clk, adiv);
return adiv;
}
/*
* In auto-CTS mode, the TDA998x uses a "measured time stamp" counter to
* generate the CTS value. It appears that the "measured time stamp" is
* the number of TDMS clock cycles within a number of audio input clock
* cycles defined by the k and N parameters defined below, in a similar
* way to that which is set out in the CTS generation in the HDMI spec.
*
* tmdsclk ----> mts -> /m ---> CTS
* ^
* sclk -> /k -> /N
*
* CTS = mts / m, where m is 2^M.
* /k is a divider based on the K value below, K+1 for K < 4, or 8 for K >= 4
* /N is a divider based on the HDMI specified N value.
*
* This produces the following equation:
* CTS = tmds_clock * k * N / (sclk * m)
*
* When combined with the sink-side equation, and realising that sclk is
* bclk_ratio * fs, we end up with:
* k = m * bclk_ratio / 128.
*
* Note: S/PDIF always uses a bclk_ratio of 64.
*/
static int tda998x_derive_cts_n(struct tda998x_priv *priv,
struct tda998x_audio_settings *settings,
unsigned int ratio)
{
switch (ratio) {
case 16:
settings->cts_n = CTS_N_M(3) | CTS_N_K(0);
break;
case 32:
settings->cts_n = CTS_N_M(3) | CTS_N_K(1);
break;
case 48:
settings->cts_n = CTS_N_M(3) | CTS_N_K(2);
break;
case 64:
settings->cts_n = CTS_N_M(3) | CTS_N_K(3);
break;
case 128:
settings->cts_n = CTS_N_M(0) | CTS_N_K(0);
break;
default:
dev_err(&priv->hdmi->dev, "unsupported bclk ratio %ufs\n",
ratio);
return -EINVAL;
}
return 0;
}
static void tda998x_audio_mute(struct tda998x_priv *priv, bool on)
{
if (on) {
reg_set(priv, REG_SOFTRESET, SOFTRESET_AUDIO);
reg_clear(priv, REG_SOFTRESET, SOFTRESET_AUDIO);
reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
} else {
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
}
}
static void tda998x_configure_audio(struct tda998x_priv *priv)
{
const struct tda998x_audio_settings *settings = &priv->audio;
u8 buf[6], adiv;
u32 n;
/* If audio is not configured, there is nothing to do. */
if (settings->ena_ap == 0)
return;
adiv = tda998x_get_adiv(priv, settings->sample_rate);
/* Enable audio ports */
reg_write(priv, REG_ENA_AP, settings->ena_ap);
reg_write(priv, REG_ENA_ACLK, settings->route->ena_aclk);
reg_write(priv, REG_MUX_AP, settings->route->mux_ap);
reg_write(priv, REG_I2S_FORMAT, settings->i2s_format);
reg_write(priv, REG_AIP_CLKSEL, settings->route->aip_clksel);
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_LAYOUT |
AIP_CNTRL_0_ACR_MAN); /* auto CTS */
reg_write(priv, REG_CTS_N, settings->cts_n);
reg_write(priv, REG_AUDIO_DIV, adiv);
/*
* This is the approximate value of N, which happens to be
* the recommended values for non-coherent clocks.
*/
n = 128 * settings->sample_rate / 1000;
/* Write the CTS and N values */
buf[0] = 0x44;
buf[1] = 0x42;
buf[2] = 0x01;
buf[3] = n;
buf[4] = n >> 8;
buf[5] = n >> 16;
reg_write_range(priv, REG_ACR_CTS_0, buf, 6);
/* Reset CTS generator */
reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
/* Write the channel status
* The REG_CH_STAT_B-registers skip IEC958 AES2 byte, because
* there is a separate register for each I2S wire.
*/
buf[0] = settings->status[0];
buf[1] = settings->status[1];
buf[2] = settings->status[3];
buf[3] = settings->status[4];
reg_write_range(priv, REG_CH_STAT_B(0), buf, 4);
tda998x_audio_mute(priv, true);
msleep(20);
tda998x_audio_mute(priv, false);
tda998x_write_aif(priv, &settings->cea);
}
static int tda998x_audio_hw_params(struct device *dev, void *data,
struct hdmi_codec_daifmt *daifmt,
struct hdmi_codec_params *params)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
unsigned int bclk_ratio;
bool spdif = daifmt->fmt == HDMI_SPDIF;
int ret;
struct tda998x_audio_settings audio = {
.sample_rate = params->sample_rate,
.cea = params->cea,
};
memcpy(audio.status, params->iec.status,
min(sizeof(audio.status), sizeof(params->iec.status)));
switch (daifmt->fmt) {
case HDMI_I2S:
audio.i2s_format = I2S_FORMAT_PHILIPS;
break;
case HDMI_LEFT_J:
audio.i2s_format = I2S_FORMAT_LEFT_J;
break;
case HDMI_RIGHT_J:
audio.i2s_format = I2S_FORMAT_RIGHT_J;
break;
case HDMI_SPDIF:
audio.i2s_format = 0;
break;
default:
dev_err(dev, "%s: Invalid format %d\n", __func__, daifmt->fmt);
return -EINVAL;
}
if (!spdif &&
(daifmt->bit_clk_inv || daifmt->frame_clk_inv ||
daifmt->bit_clk_master || daifmt->frame_clk_master)) {
dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
daifmt->bit_clk_inv, daifmt->frame_clk_inv,
daifmt->bit_clk_master,
daifmt->frame_clk_master);
return -EINVAL;
}
ret = tda998x_derive_routing(priv, &audio, AUDIO_ROUTE_I2S + spdif);
if (ret < 0)
return ret;
bclk_ratio = spdif ? 64 : params->sample_width * 2;
ret = tda998x_derive_cts_n(priv, &audio, bclk_ratio);
if (ret < 0)
return ret;
mutex_lock(&priv->audio_mutex);
priv->audio = audio;
if (priv->supports_infoframes && priv->sink_has_audio)
tda998x_configure_audio(priv);
mutex_unlock(&priv->audio_mutex);
return 0;
}
static void tda998x_audio_shutdown(struct device *dev, void *data)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
mutex_lock(&priv->audio_mutex);
reg_write(priv, REG_ENA_AP, 0);
priv->audio.ena_ap = 0;
mutex_unlock(&priv->audio_mutex);
}
int tda998x_audio_digital_mute(struct device *dev, void *data, bool enable)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
mutex_lock(&priv->audio_mutex);
tda998x_audio_mute(priv, enable);
mutex_unlock(&priv->audio_mutex);
return 0;
}
static int tda998x_audio_get_eld(struct device *dev, void *data,
uint8_t *buf, size_t len)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
mutex_lock(&priv->audio_mutex);
memcpy(buf, priv->connector.eld,
min(sizeof(priv->connector.eld), len));
mutex_unlock(&priv->audio_mutex);
return 0;
}
static const struct hdmi_codec_ops audio_codec_ops = {
.hw_params = tda998x_audio_hw_params,
.audio_shutdown = tda998x_audio_shutdown,
.digital_mute = tda998x_audio_digital_mute,
.get_eld = tda998x_audio_get_eld,
};
static int tda998x_audio_codec_init(struct tda998x_priv *priv,
struct device *dev)
{
struct hdmi_codec_pdata codec_data = {
.ops = &audio_codec_ops,
.max_i2s_channels = 2,
};
if (priv->audio_port_enable[AUDIO_ROUTE_I2S])
codec_data.i2s = 1;
if (priv->audio_port_enable[AUDIO_ROUTE_SPDIF])
codec_data.spdif = 1;
priv->audio_pdev = platform_device_register_data(
dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
&codec_data, sizeof(codec_data));
return PTR_ERR_OR_ZERO(priv->audio_pdev);
}
/* DRM connector functions */
static enum drm_connector_status
tda998x_connector_detect(struct drm_connector *connector, bool force)
{
struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
u8 val = cec_read(priv, REG_CEC_RXSHPDLEV);
return (val & CEC_RXSHPDLEV_HPD) ? connector_status_connected :
connector_status_disconnected;
}
static void tda998x_connector_destroy(struct drm_connector *connector)
{
drm_connector_cleanup(connector);
}
static const struct drm_connector_funcs tda998x_connector_funcs = {
.reset = drm_atomic_helper_connector_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = tda998x_connector_detect,
.destroy = tda998x_connector_destroy,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int read_edid_block(void *data, u8 *buf, unsigned int blk, size_t length)
{
struct tda998x_priv *priv = data;
u8 offset, segptr;
int ret, i;
offset = (blk & 1) ? 128 : 0;
segptr = blk / 2;
mutex_lock(&priv->edid_mutex);
reg_write(priv, REG_DDC_ADDR, 0xa0);
reg_write(priv, REG_DDC_OFFS, offset);
reg_write(priv, REG_DDC_SEGM_ADDR, 0x60);
reg_write(priv, REG_DDC_SEGM, segptr);
/* enable reading EDID: */
priv->wq_edid_wait = 1;
reg_write(priv, REG_EDID_CTRL, 0x1);
/* flag must be cleared by sw: */
reg_write(priv, REG_EDID_CTRL, 0x0);
/* wait for block read to complete: */
if (priv->hdmi->irq) {
i = wait_event_timeout(priv->wq_edid,
!priv->wq_edid_wait,
msecs_to_jiffies(100));
if (i < 0) {
dev_err(&priv->hdmi->dev, "read edid wait err %d\n", i);
ret = i;
goto failed;
}
} else {
for (i = 100; i > 0; i--) {
msleep(1);
ret = reg_read(priv, REG_INT_FLAGS_2);
if (ret < 0)
goto failed;
if (ret & INT_FLAGS_2_EDID_BLK_RD)
break;
}
}
if (i == 0) {
dev_err(&priv->hdmi->dev, "read edid timeout\n");
ret = -ETIMEDOUT;
goto failed;
}
ret = reg_read_range(priv, REG_EDID_DATA_0, buf, length);
if (ret != length) {
dev_err(&priv->hdmi->dev, "failed to read edid block %d: %d\n",
blk, ret);
goto failed;
}
ret = 0;
failed:
mutex_unlock(&priv->edid_mutex);
return ret;
}
static int tda998x_connector_get_modes(struct drm_connector *connector)
{
struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
struct edid *edid;
int n;
/*
* If we get killed while waiting for the HPD timeout, return
* no modes found: we are not in a restartable path, so we
* can't handle signals gracefully.
*/
if (tda998x_edid_delay_wait(priv))
return 0;
if (priv->rev == TDA19988)
reg_clear(priv, REG_TX4, TX4_PD_RAM);
edid = drm_do_get_edid(connector, read_edid_block, priv);
if (priv->rev == TDA19988)
reg_set(priv, REG_TX4, TX4_PD_RAM);
if (!edid) {
dev_warn(&priv->hdmi->dev, "failed to read EDID\n");
return 0;
}
drm_connector_update_edid_property(connector, edid);
cec_notifier_set_phys_addr_from_edid(priv->cec_notify, edid);
mutex_lock(&priv->audio_mutex);
n = drm_add_edid_modes(connector, edid);
priv->sink_has_audio = drm_detect_monitor_audio(edid);
mutex_unlock(&priv->audio_mutex);
kfree(edid);
return n;
}
static struct drm_encoder *
tda998x_connector_best_encoder(struct drm_connector *connector)
{
struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
return priv->bridge.encoder;
}
static
const struct drm_connector_helper_funcs tda998x_connector_helper_funcs = {
.get_modes = tda998x_connector_get_modes,
.best_encoder = tda998x_connector_best_encoder,
};
static int tda998x_connector_init(struct tda998x_priv *priv,
struct drm_device *drm)
{
struct drm_connector *connector = &priv->connector;
int ret;
connector->interlace_allowed = 1;
if (priv->hdmi->irq)
connector->polled = DRM_CONNECTOR_POLL_HPD;
else
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
drm_connector_helper_add(connector, &tda998x_connector_helper_funcs);
ret = drm_connector_init(drm, connector, &tda998x_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
if (ret)
return ret;
drm_connector_attach_encoder(&priv->connector,
priv->bridge.encoder);
return 0;
}
/* DRM bridge functions */
static int tda998x_bridge_attach(struct drm_bridge *bridge)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
return tda998x_connector_init(priv, bridge->dev);
}
static void tda998x_bridge_detach(struct drm_bridge *bridge)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
drm_connector_cleanup(&priv->connector);
}
static enum drm_mode_status tda998x_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_mode *mode)
{
/* TDA19988 dotclock can go up to 165MHz */
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
if (mode->clock > ((priv->rev == TDA19988) ? 165000 : 150000))
return MODE_CLOCK_HIGH;
if (mode->htotal >= BIT(13))
return MODE_BAD_HVALUE;
if (mode->vtotal >= BIT(11))
return MODE_BAD_VVALUE;
return MODE_OK;
}
static void tda998x_bridge_enable(struct drm_bridge *bridge)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
if (!priv->is_on) {
/* enable video ports, audio will be enabled later */
reg_write(priv, REG_ENA_VP_0, 0xff);
reg_write(priv, REG_ENA_VP_1, 0xff);
reg_write(priv, REG_ENA_VP_2, 0xff);
/* set muxing after enabling ports: */
reg_write(priv, REG_VIP_CNTRL_0, priv->vip_cntrl_0);
reg_write(priv, REG_VIP_CNTRL_1, priv->vip_cntrl_1);
reg_write(priv, REG_VIP_CNTRL_2, priv->vip_cntrl_2);
priv->is_on = true;
}
}
static void tda998x_bridge_disable(struct drm_bridge *bridge)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
if (priv->is_on) {
/* disable video ports */
reg_write(priv, REG_ENA_VP_0, 0x00);
reg_write(priv, REG_ENA_VP_1, 0x00);
reg_write(priv, REG_ENA_VP_2, 0x00);
priv->is_on = false;
}
}
static void tda998x_bridge_mode_set(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
const struct drm_display_mode *adjusted_mode)
{
struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
unsigned long tmds_clock;
u16 ref_pix, ref_line, n_pix, n_line;
u16 hs_pix_s, hs_pix_e;
u16 vs1_pix_s, vs1_pix_e, vs1_line_s, vs1_line_e;
u16 vs2_pix_s, vs2_pix_e, vs2_line_s, vs2_line_e;
u16 vwin1_line_s, vwin1_line_e;
u16 vwin2_line_s, vwin2_line_e;
u16 de_pix_s, de_pix_e;
u8 reg, div, rep, sel_clk;
/*
* Since we are "computer" like, our source invariably produces
* full-range RGB. If the monitor supports full-range, then use
* it, otherwise reduce to limited-range.
*/
priv->rgb_quant_range =
priv->connector.display_info.rgb_quant_range_selectable ?
HDMI_QUANTIZATION_RANGE_FULL :
drm_default_rgb_quant_range(adjusted_mode);
/*
* Internally TDA998x is using ITU-R BT.656 style sync but
* we get VESA style sync. TDA998x is using a reference pixel
* relative to ITU to sync to the input frame and for output
* sync generation. Currently, we are using reference detection
* from HS/VS, i.e. REFPIX/REFLINE denote frame start sync point
* which is position of rising VS with coincident rising HS.
*
* Now there is some issues to take care of:
* - HDMI data islands require sync-before-active
* - TDA998x register values must be > 0 to be enabled
* - REFLINE needs an additional offset of +1
* - REFPIX needs an addtional offset of +1 for UYUV and +3 for RGB
*
* So we add +1 to all horizontal and vertical register values,
* plus an additional +3 for REFPIX as we are using RGB input only.
*/
n_pix = mode->htotal;
n_line = mode->vtotal;
hs_pix_e = mode->hsync_end - mode->hdisplay;
hs_pix_s = mode->hsync_start - mode->hdisplay;
de_pix_e = mode->htotal;
de_pix_s = mode->htotal - mode->hdisplay;
ref_pix = 3 + hs_pix_s;
/*
* Attached LCD controllers may generate broken sync. Allow
* those to adjust the position of the rising VS edge by adding
* HSKEW to ref_pix.
*/
if (adjusted_mode->flags & DRM_MODE_FLAG_HSKEW)
ref_pix += adjusted_mode->hskew;
if ((mode->flags & DRM_MODE_FLAG_INTERLACE) == 0) {
ref_line = 1 + mode->vsync_start - mode->vdisplay;
vwin1_line_s = mode->vtotal - mode->vdisplay - 1;
vwin1_line_e = vwin1_line_s + mode->vdisplay;
vs1_pix_s = vs1_pix_e = hs_pix_s;
vs1_line_s = mode->vsync_start - mode->vdisplay;
vs1_line_e = vs1_line_s +
mode->vsync_end - mode->vsync_start;
vwin2_line_s = vwin2_line_e = 0;
vs2_pix_s = vs2_pix_e = 0;
vs2_line_s = vs2_line_e = 0;
} else {
ref_line = 1 + (mode->vsync_start - mode->vdisplay)/2;
vwin1_line_s = (mode->vtotal - mode->vdisplay)/2;
vwin1_line_e = vwin1_line_s + mode->vdisplay/2;
vs1_pix_s = vs1_pix_e = hs_pix_s;
vs1_line_s = (mode->vsync_start - mode->vdisplay)/2;
vs1_line_e = vs1_line_s +
(mode->vsync_end - mode->vsync_start)/2;
vwin2_line_s = vwin1_line_s + mode->vtotal/2;
vwin2_line_e = vwin2_line_s + mode->vdisplay/2;
vs2_pix_s = vs2_pix_e = hs_pix_s + mode->htotal/2;
vs2_line_s = vs1_line_s + mode->vtotal/2 ;
vs2_line_e = vs2_line_s +
(mode->vsync_end - mode->vsync_start)/2;
}
/*
* Select pixel repeat depending on the double-clock flag
* (which means we have to repeat each pixel once.)
*/
rep = mode->flags & DRM_MODE_FLAG_DBLCLK ? 1 : 0;
sel_clk = SEL_CLK_ENA_SC_CLK | SEL_CLK_SEL_CLK1 |
SEL_CLK_SEL_VRF_CLK(rep ? 2 : 0);
/* the TMDS clock is scaled up by the pixel repeat */
tmds_clock = mode->clock * (1 + rep);
/*
* The divisor is power-of-2. The TDA9983B datasheet gives
* this as ranges of Msample/s, which is 10x the TMDS clock:
* 0 - 800 to 1500 Msample/s
* 1 - 400 to 800 Msample/s
* 2 - 200 to 400 Msample/s
* 3 - as 2 above
*/
for (div = 0; div < 3; div++)
if (80000 >> div <= tmds_clock)
break;
mutex_lock(&priv->audio_mutex);
priv->tmds_clock = tmds_clock;
/* mute the audio FIFO: */
reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
/* set HDMI HDCP mode off: */
reg_write(priv, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
reg_clear(priv, REG_TX33, TX33_HDMI);
reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(0));
/* no pre-filter or interpolator: */
reg_write(priv, REG_HVF_CNTRL_0, HVF_CNTRL_0_PREFIL(0) |
HVF_CNTRL_0_INTPOL(0));
reg_set(priv, REG_FEAT_POWERDOWN, FEAT_POWERDOWN_PREFILT);
reg_write(priv, REG_VIP_CNTRL_5, VIP_CNTRL_5_SP_CNT(0));
reg_write(priv, REG_VIP_CNTRL_4, VIP_CNTRL_4_BLANKIT(0) |
VIP_CNTRL_4_BLC(0));
reg_clear(priv, REG_PLL_SERIAL_1, PLL_SERIAL_1_SRL_MAN_IZ);
reg_clear(priv, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_CCIR |
PLL_SERIAL_3_SRL_DE);
reg_write(priv, REG_SERIALIZER, 0);
reg_write(priv, REG_HVF_CNTRL_1, HVF_CNTRL_1_VQR(0));
reg_write(priv, REG_RPT_CNTRL, RPT_CNTRL_REPEAT(rep));
reg_write(priv, REG_SEL_CLK, sel_clk);
reg_write(priv, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(div) |
PLL_SERIAL_2_SRL_PR(rep));
/* set color matrix according to output rgb quant range */
if (priv->rgb_quant_range == HDMI_QUANTIZATION_RANGE_LIMITED) {
static u8 tda998x_full_to_limited_range[] = {
MAT_CONTRL_MAT_SC(2),
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x6f, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x03, 0x6f, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x03, 0x6f,
0x00, 0x40, 0x00, 0x40, 0x00, 0x40
};
reg_clear(priv, REG_FEAT_POWERDOWN, FEAT_POWERDOWN_CSC);
reg_write_range(priv, REG_MAT_CONTRL,
tda998x_full_to_limited_range,
sizeof(tda998x_full_to_limited_range));
} else {
reg_write(priv, REG_MAT_CONTRL, MAT_CONTRL_MAT_BP |
MAT_CONTRL_MAT_SC(1));
reg_set(priv, REG_FEAT_POWERDOWN, FEAT_POWERDOWN_CSC);
}
/* set BIAS tmds value: */
reg_write(priv, REG_ANA_GENERAL, 0x09);
/*
* Sync on rising HSYNC/VSYNC
*/
reg = VIP_CNTRL_3_SYNC_HS;
/*
* TDA19988 requires high-active sync at input stage,
* so invert low-active sync provided by master encoder here
*/
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
reg |= VIP_CNTRL_3_H_TGL;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
reg |= VIP_CNTRL_3_V_TGL;
reg_write(priv, REG_VIP_CNTRL_3, reg);
reg_write(priv, REG_VIDFORMAT, 0x00);
reg_write16(priv, REG_REFPIX_MSB, ref_pix);
reg_write16(priv, REG_REFLINE_MSB, ref_line);
reg_write16(priv, REG_NPIX_MSB, n_pix);
reg_write16(priv, REG_NLINE_MSB, n_line);
reg_write16(priv, REG_VS_LINE_STRT_1_MSB, vs1_line_s);
reg_write16(priv, REG_VS_PIX_STRT_1_MSB, vs1_pix_s);
reg_write16(priv, REG_VS_LINE_END_1_MSB, vs1_line_e);
reg_write16(priv, REG_VS_PIX_END_1_MSB, vs1_pix_e);
reg_write16(priv, REG_VS_LINE_STRT_2_MSB, vs2_line_s);
reg_write16(priv, REG_VS_PIX_STRT_2_MSB, vs2_pix_s);
reg_write16(priv, REG_VS_LINE_END_2_MSB, vs2_line_e);
reg_write16(priv, REG_VS_PIX_END_2_MSB, vs2_pix_e);
reg_write16(priv, REG_HS_PIX_START_MSB, hs_pix_s);
reg_write16(priv, REG_HS_PIX_STOP_MSB, hs_pix_e);
reg_write16(priv, REG_VWIN_START_1_MSB, vwin1_line_s);
reg_write16(priv, REG_VWIN_END_1_MSB, vwin1_line_e);
reg_write16(priv, REG_VWIN_START_2_MSB, vwin2_line_s);
reg_write16(priv, REG_VWIN_END_2_MSB, vwin2_line_e);
reg_write16(priv, REG_DE_START_MSB, de_pix_s);
reg_write16(priv, REG_DE_STOP_MSB, de_pix_e);
if (priv->rev == TDA19988) {
/* let incoming pixels fill the active space (if any) */
reg_write(priv, REG_ENABLE_SPACE, 0x00);
}
/*
* Always generate sync polarity relative to input sync and
* revert input stage toggled sync at output stage
*/
reg = TBG_CNTRL_1_DWIN_DIS | TBG_CNTRL_1_TGL_EN;
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
reg |= TBG_CNTRL_1_H_TGL;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
reg |= TBG_CNTRL_1_V_TGL;
reg_write(priv, REG_TBG_CNTRL_1, reg);
/* must be last register set: */
reg_write(priv, REG_TBG_CNTRL_0, 0);
/* CEA-861B section 6 says that:
* CEA version 1 (CEA-861) has no support for infoframes.
* CEA version 2 (CEA-861A) supports version 1 AVI infoframes,
* and optional basic audio.
* CEA version 3 (CEA-861B) supports version 1 and 2 AVI infoframes,
* and optional digital audio, with audio infoframes.
*
* Since we only support generation of version 2 AVI infoframes,
* ignore CEA version 2 and below (iow, behave as if we're a
* CEA-861 source.)
*/
priv->supports_infoframes = priv->connector.display_info.cea_rev >= 3;
if (priv->supports_infoframes) {
/* We need to turn HDMI HDCP stuff on to get audio through */
reg &= ~TBG_CNTRL_1_DWIN_DIS;
reg_write(priv, REG_TBG_CNTRL_1, reg);
reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(1));
reg_set(priv, REG_TX33, TX33_HDMI);
tda998x_write_avi(priv, adjusted_mode);
if (priv->sink_has_audio)
tda998x_configure_audio(priv);
}
mutex_unlock(&priv->audio_mutex);
}
static const struct drm_bridge_funcs tda998x_bridge_funcs = {
.attach = tda998x_bridge_attach,
.detach = tda998x_bridge_detach,
.mode_valid = tda998x_bridge_mode_valid,
.disable = tda998x_bridge_disable,
.mode_set = tda998x_bridge_mode_set,
.enable = tda998x_bridge_enable,
};
/* I2C driver functions */
static int tda998x_get_audio_ports(struct tda998x_priv *priv,
struct device_node *np)
{
const u32 *port_data;
u32 size;
int i;
port_data = of_get_property(np, "audio-ports", &size);
if (!port_data)
return 0;
size /= sizeof(u32);
if (size > 2 * ARRAY_SIZE(priv->audio_port_enable) || size % 2 != 0) {
dev_err(&priv->hdmi->dev,
"Bad number of elements in audio-ports dt-property\n");
return -EINVAL;
}
size /= 2;
for (i = 0; i < size; i++) {
unsigned int route;
u8 afmt = be32_to_cpup(&port_data[2*i]);
u8 ena_ap = be32_to_cpup(&port_data[2*i+1]);
switch (afmt) {
case AFMT_I2S:
route = AUDIO_ROUTE_I2S;
break;
case AFMT_SPDIF:
route = AUDIO_ROUTE_SPDIF;
break;
default:
dev_err(&priv->hdmi->dev,
"Bad audio format %u\n", afmt);
return -EINVAL;
}
if (!ena_ap) {
dev_err(&priv->hdmi->dev, "invalid zero port config\n");
continue;
}
if (priv->audio_port_enable[route]) {
dev_err(&priv->hdmi->dev,
"%s format already configured\n",
route == AUDIO_ROUTE_SPDIF ? "SPDIF" : "I2S");
return -EINVAL;
}
priv->audio_port_enable[route] = ena_ap;
}
return 0;
}
static int tda998x_set_config(struct tda998x_priv *priv,
const struct tda998x_encoder_params *p)
{
priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(p->swap_a) |
(p->mirr_a ? VIP_CNTRL_0_MIRR_A : 0) |
VIP_CNTRL_0_SWAP_B(p->swap_b) |
(p->mirr_b ? VIP_CNTRL_0_MIRR_B : 0);
priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(p->swap_c) |
(p->mirr_c ? VIP_CNTRL_1_MIRR_C : 0) |
VIP_CNTRL_1_SWAP_D(p->swap_d) |
(p->mirr_d ? VIP_CNTRL_1_MIRR_D : 0);
priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(p->swap_e) |
(p->mirr_e ? VIP_CNTRL_2_MIRR_E : 0) |
VIP_CNTRL_2_SWAP_F(p->swap_f) |
(p->mirr_f ? VIP_CNTRL_2_MIRR_F : 0);
if (p->audio_params.format != AFMT_UNUSED) {
unsigned int ratio, route;
bool spdif = p->audio_params.format == AFMT_SPDIF;
route = AUDIO_ROUTE_I2S + spdif;
priv->audio.route = &tda998x_audio_route[route];
priv->audio.cea = p->audio_params.cea;
priv->audio.sample_rate = p->audio_params.sample_rate;
memcpy(priv->audio.status, p->audio_params.status,
min(sizeof(priv->audio.status),
sizeof(p->audio_params.status)));
priv->audio.ena_ap = p->audio_params.config;
priv->audio.i2s_format = I2S_FORMAT_PHILIPS;
ratio = spdif ? 64 : p->audio_params.sample_width * 2;
return tda998x_derive_cts_n(priv, &priv->audio, ratio);
}
return 0;
}
static void tda998x_destroy(struct device *dev)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
drm_bridge_remove(&priv->bridge);
/* disable all IRQs and free the IRQ handler */
cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
reg_clear(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
if (priv->audio_pdev)
platform_device_unregister(priv->audio_pdev);
if (priv->hdmi->irq)
free_irq(priv->hdmi->irq, priv);
del_timer_sync(&priv->edid_delay_timer);
cancel_work_sync(&priv->detect_work);
i2c_unregister_device(priv->cec);
if (priv->cec_notify)
cec_notifier_put(priv->cec_notify);
}
static int tda998x_create(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct device_node *np = client->dev.of_node;
struct i2c_board_info cec_info;
struct tda998x_priv *priv;
u32 video;
int rev_lo, rev_hi, ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev_set_drvdata(dev, priv);
mutex_init(&priv->mutex); /* protect the page access */
mutex_init(&priv->audio_mutex); /* protect access from audio thread */
mutex_init(&priv->edid_mutex);
INIT_LIST_HEAD(&priv->bridge.list);
init_waitqueue_head(&priv->edid_delay_waitq);
timer_setup(&priv->edid_delay_timer, tda998x_edid_delay_done, 0);
INIT_WORK(&priv->detect_work, tda998x_detect_work);
priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3);
priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1);
priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5);
/* CEC I2C address bound to TDA998x I2C addr by configuration pins */
priv->cec_addr = 0x34 + (client->addr & 0x03);
priv->current_page = 0xff;
priv->hdmi = client;
/* wake up the device: */
cec_write(priv, REG_CEC_ENAMODS,
CEC_ENAMODS_EN_RXSENS | CEC_ENAMODS_EN_HDMI);
tda998x_reset(priv);
/* read version: */
rev_lo = reg_read(priv, REG_VERSION_LSB);
if (rev_lo < 0) {
dev_err(dev, "failed to read version: %d\n", rev_lo);
return rev_lo;
}
rev_hi = reg_read(priv, REG_VERSION_MSB);
if (rev_hi < 0) {
dev_err(dev, "failed to read version: %d\n", rev_hi);
return rev_hi;
}
priv->rev = rev_lo | rev_hi << 8;
/* mask off feature bits: */
priv->rev &= ~0x30; /* not-hdcp and not-scalar bit */
switch (priv->rev) {
case TDA9989N2:
dev_info(dev, "found TDA9989 n2");
break;
case TDA19989:
dev_info(dev, "found TDA19989");
break;
case TDA19989N2:
dev_info(dev, "found TDA19989 n2");
break;
case TDA19988:
dev_info(dev, "found TDA19988");
break;
default:
dev_err(dev, "found unsupported device: %04x\n", priv->rev);
return -ENXIO;
}
/* after reset, enable DDC: */
reg_write(priv, REG_DDC_DISABLE, 0x00);
/* set clock on DDC channel: */
reg_write(priv, REG_TX3, 39);
/* if necessary, disable multi-master: */
if (priv->rev == TDA19989)
reg_set(priv, REG_I2C_MASTER, I2C_MASTER_DIS_MM);
cec_write(priv, REG_CEC_FRO_IM_CLK_CTRL,
CEC_FRO_IM_CLK_CTRL_GHOST_DIS | CEC_FRO_IM_CLK_CTRL_IMCLK_SEL);
/* ensure interrupts are disabled */
cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
/* clear pending interrupts */
cec_read(priv, REG_CEC_RXSHPDINT);
reg_read(priv, REG_INT_FLAGS_0);
reg_read(priv, REG_INT_FLAGS_1);
reg_read(priv, REG_INT_FLAGS_2);
/* initialize the optional IRQ */
if (client->irq) {
unsigned long irq_flags;
/* init read EDID waitqueue and HDP work */
init_waitqueue_head(&priv->wq_edid);
irq_flags =
irqd_get_trigger_type(irq_get_irq_data(client->irq));
priv->cec_glue.irq_flags = irq_flags;
irq_flags |= IRQF_SHARED | IRQF_ONESHOT;
ret = request_threaded_irq(client->irq, NULL,
tda998x_irq_thread, irq_flags,
"tda998x", priv);
if (ret) {
dev_err(dev, "failed to request IRQ#%u: %d\n",
client->irq, ret);
goto err_irq;
}
/* enable HPD irq */
cec_write(priv, REG_CEC_RXSHPDINTENA, CEC_RXSHPDLEV_HPD);
}
priv->cec_notify = cec_notifier_get(dev);
if (!priv->cec_notify) {
ret = -ENOMEM;
goto fail;
}
priv->cec_glue.parent = dev;
priv->cec_glue.data = priv;
priv->cec_glue.init = tda998x_cec_hook_init;
priv->cec_glue.exit = tda998x_cec_hook_exit;
priv->cec_glue.open = tda998x_cec_hook_open;
priv->cec_glue.release = tda998x_cec_hook_release;
/*
* Some TDA998x are actually two I2C devices merged onto one piece
* of silicon: TDA9989 and TDA19989 combine the HDMI transmitter
* with a slightly modified TDA9950 CEC device. The CEC device
* is at the TDA9950 address, with the address pins strapped across
* to the TDA998x address pins. Hence, it always has the same
* offset.
*/
memset(&cec_info, 0, sizeof(cec_info));
strlcpy(cec_info.type, "tda9950", sizeof(cec_info.type));
cec_info.addr = priv->cec_addr;
cec_info.platform_data = &priv->cec_glue;
cec_info.irq = client->irq;
priv->cec = i2c_new_device(client->adapter, &cec_info);
if (!priv->cec) {
ret = -ENODEV;
goto fail;
}
/* enable EDID read irq: */
reg_set(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
if (np) {
/* get the device tree parameters */
ret = of_property_read_u32(np, "video-ports", &video);
if (ret == 0) {
priv->vip_cntrl_0 = video >> 16;
priv->vip_cntrl_1 = video >> 8;
priv->vip_cntrl_2 = video;
}
ret = tda998x_get_audio_ports(priv, np);
if (ret)
goto fail;
if (priv->audio_port_enable[AUDIO_ROUTE_I2S] ||
priv->audio_port_enable[AUDIO_ROUTE_SPDIF])
tda998x_audio_codec_init(priv, &client->dev);
} else if (dev->platform_data) {
ret = tda998x_set_config(priv, dev->platform_data);
if (ret)
goto fail;
}
priv->bridge.funcs = &tda998x_bridge_funcs;
#ifdef CONFIG_OF
priv->bridge.of_node = dev->of_node;
#endif
drm_bridge_add(&priv->bridge);
return 0;
fail:
tda998x_destroy(dev);
err_irq:
return ret;
}
/* DRM encoder functions */
static void tda998x_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs tda998x_encoder_funcs = {
.destroy = tda998x_encoder_destroy,
};
static int tda998x_encoder_init(struct device *dev, struct drm_device *drm)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
u32 crtcs = 0;
int ret;
if (dev->of_node)
crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
/* If no CRTCs were found, fall back to our old behaviour */
if (crtcs == 0) {
dev_warn(dev, "Falling back to first CRTC\n");
crtcs = 1 << 0;
}
priv->encoder.possible_crtcs = crtcs;
ret = drm_encoder_init(drm, &priv->encoder, &tda998x_encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
if (ret)
goto err_encoder;
ret = drm_bridge_attach(&priv->encoder, &priv->bridge, NULL);
if (ret)
goto err_bridge;
return 0;
err_bridge:
drm_encoder_cleanup(&priv->encoder);
err_encoder:
return ret;
}
static int tda998x_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *drm = data;
return tda998x_encoder_init(dev, drm);
}
static void tda998x_unbind(struct device *dev, struct device *master,
void *data)
{
struct tda998x_priv *priv = dev_get_drvdata(dev);
drm_encoder_cleanup(&priv->encoder);
}
static const struct component_ops tda998x_ops = {
.bind = tda998x_bind,
.unbind = tda998x_unbind,
};
static int
tda998x_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
int ret;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_warn(&client->dev, "adapter does not support I2C\n");
return -EIO;
}
ret = tda998x_create(&client->dev);
if (ret)
return ret;
ret = component_add(&client->dev, &tda998x_ops);
if (ret)
tda998x_destroy(&client->dev);
return ret;
}
static int tda998x_remove(struct i2c_client *client)
{
component_del(&client->dev, &tda998x_ops);
tda998x_destroy(&client->dev);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id tda998x_dt_ids[] = {
{ .compatible = "nxp,tda998x", },
{ }
};
MODULE_DEVICE_TABLE(of, tda998x_dt_ids);
#endif
static const struct i2c_device_id tda998x_ids[] = {
{ "tda998x", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tda998x_ids);
static struct i2c_driver tda998x_driver = {
.probe = tda998x_probe,
.remove = tda998x_remove,
.driver = {
.name = "tda998x",
.of_match_table = of_match_ptr(tda998x_dt_ids),
},
.id_table = tda998x_ids,
};
module_i2c_driver(tda998x_driver);
MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
MODULE_DESCRIPTION("NXP Semiconductors TDA998X HDMI Encoder");
MODULE_LICENSE("GPL");
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