drivers/gpu/drm/i2c/tda998x_drv.c

   1 /*
   2  * Copyright (C) 2012 Texas Instruments
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18
  19
  20 #include <linux/hdmi.h>
  21 #include <linux/module.h>
  22 #include <linux/irq.h>
  23 #include <sound/asoundef.h>
  24
  25 #include <drm/drmP.h>
  26 #include <drm/drm_crtc_helper.h>
  27 #include <drm/drm_encoder_slave.h>
  28 #include <drm/drm_edid.h>
  29 #include <drm/i2c/tda998x.h>
  30
  31 #define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
  32
  33 struct tda998x_priv {
  34         struct i2c_client *cec;
  35         struct i2c_client *hdmi;
  36         uint16_t rev;
  37         uint8_t current_page;
  38         int dpms;
  39         bool is_hdmi_sink;
  40         u8 vip_cntrl_0;
  41         u8 vip_cntrl_1;
  42         u8 vip_cntrl_2;
  43         struct tda998x_encoder_params params;
  44
  45         wait_queue_head_t wq_edid;
  46         volatile int wq_edid_wait;
  47         struct drm_encoder *encoder;
  48 };
  49
  50 #define to_tda998x_priv(x)  ((struct tda998x_priv *)to_encoder_slave(x)->slave_priv)
  51
  52 /* The TDA9988 series of devices use a paged register scheme.. to simplify
  53  * things we encode the page # in upper bits of the register #.  To read/
  54  * write a given register, we need to make sure CURPAGE register is set
  55  * appropriately.  Which implies reads/writes are not atomic.  Fun!
  56  */
  57
  58 #define REG(page, addr) (((page) << 8) | (addr))
  59 #define REG2ADDR(reg)   ((reg) & 0xff)
  60 #define REG2PAGE(reg)   (((reg) >> 8) & 0xff)
  61
  62 #define REG_CURPAGE               0xff                /* write */
  63
  64
  65 /* Page 00h: General Control */
  66 #define REG_VERSION_LSB           REG(0x00, 0x00)     /* read */
  67 #define REG_MAIN_CNTRL0           REG(0x00, 0x01)     /* read/write */
  68 # define MAIN_CNTRL0_SR           (1 << 0)
  69 # define MAIN_CNTRL0_DECS         (1 << 1)
  70 # define MAIN_CNTRL0_DEHS         (1 << 2)
  71 # define MAIN_CNTRL0_CECS         (1 << 3)
  72 # define MAIN_CNTRL0_CEHS         (1 << 4)
  73 # define MAIN_CNTRL0_SCALER       (1 << 7)
  74 #define REG_VERSION_MSB           REG(0x00, 0x02)     /* read */
  75 #define REG_SOFTRESET             REG(0x00, 0x0a)     /* write */
  76 # define SOFTRESET_AUDIO          (1 << 0)
  77 # define SOFTRESET_I2C_MASTER     (1 << 1)
  78 #define REG_DDC_DISABLE           REG(0x00, 0x0b)     /* read/write */
  79 #define REG_CCLK_ON               REG(0x00, 0x0c)     /* read/write */
  80 #define REG_I2C_MASTER            REG(0x00, 0x0d)     /* read/write */
  81 # define I2C_MASTER_DIS_MM        (1 << 0)
  82 # define I2C_MASTER_DIS_FILT      (1 << 1)
  83 # define I2C_MASTER_APP_STRT_LAT  (1 << 2)
  84 #define REG_FEAT_POWERDOWN        REG(0x00, 0x0e)     /* read/write */
  85 # define FEAT_POWERDOWN_SPDIF     (1 << 3)
  86 #define REG_INT_FLAGS_0           REG(0x00, 0x0f)     /* read/write */
  87 #define REG_INT_FLAGS_1           REG(0x00, 0x10)     /* read/write */
  88 #define REG_INT_FLAGS_2           REG(0x00, 0x11)     /* read/write */
  89 # define INT_FLAGS_2_EDID_BLK_RD  (1 << 1)
  90 #define REG_ENA_ACLK              REG(0x00, 0x16)     /* read/write */
  91 #define REG_ENA_VP_0              REG(0x00, 0x18)     /* read/write */
  92 #define REG_ENA_VP_1              REG(0x00, 0x19)     /* read/write */
  93 #define REG_ENA_VP_2              REG(0x00, 0x1a)     /* read/write */
  94 #define REG_ENA_AP                REG(0x00, 0x1e)     /* read/write */
  95 #define REG_VIP_CNTRL_0           REG(0x00, 0x20)     /* write */
  96 # define VIP_CNTRL_0_MIRR_A       (1 << 7)
  97 # define VIP_CNTRL_0_SWAP_A(x)    (((x) & 7) << 4)
  98 # define VIP_CNTRL_0_MIRR_B       (1 << 3)
  99 # define VIP_CNTRL_0_SWAP_B(x)    (((x) & 7) << 0)
 100 #define REG_VIP_CNTRL_1           REG(0x00, 0x21)     /* write */
 101 # define VIP_CNTRL_1_MIRR_C       (1 << 7)
 102 # define VIP_CNTRL_1_SWAP_C(x)    (((x) & 7) << 4)
 103 # define VIP_CNTRL_1_MIRR_D       (1 << 3)
 104 # define VIP_CNTRL_1_SWAP_D(x)    (((x) & 7) << 0)
 105 #define REG_VIP_CNTRL_2           REG(0x00, 0x22)     /* write */
 106 # define VIP_CNTRL_2_MIRR_E       (1 << 7)
 107 # define VIP_CNTRL_2_SWAP_E(x)    (((x) & 7) << 4)
 108 # define VIP_CNTRL_2_MIRR_F       (1 << 3)
 109 # define VIP_CNTRL_2_SWAP_F(x)    (((x) & 7) << 0)
 110 #define REG_VIP_CNTRL_3           REG(0x00, 0x23)     /* write */
 111 # define VIP_CNTRL_3_X_TGL        (1 << 0)
 112 # define VIP_CNTRL_3_H_TGL        (1 << 1)
 113 # define VIP_CNTRL_3_V_TGL        (1 << 2)
 114 # define VIP_CNTRL_3_EMB          (1 << 3)
 115 # define VIP_CNTRL_3_SYNC_DE      (1 << 4)
 116 # define VIP_CNTRL_3_SYNC_HS      (1 << 5)
 117 # define VIP_CNTRL_3_DE_INT       (1 << 6)
 118 # define VIP_CNTRL_3_EDGE         (1 << 7)
 119 #define REG_VIP_CNTRL_4           REG(0x00, 0x24)     /* write */
 120 # define VIP_CNTRL_4_BLC(x)       (((x) & 3) << 0)
 121 # define VIP_CNTRL_4_BLANKIT(x)   (((x) & 3) << 2)
 122 # define VIP_CNTRL_4_CCIR656      (1 << 4)
 123 # define VIP_CNTRL_4_656_ALT      (1 << 5)
 124 # define VIP_CNTRL_4_TST_656      (1 << 6)
 125 # define VIP_CNTRL_4_TST_PAT      (1 << 7)
 126 #define REG_VIP_CNTRL_5           REG(0x00, 0x25)     /* write */
 127 # define VIP_CNTRL_5_CKCASE       (1 << 0)
 128 # define VIP_CNTRL_5_SP_CNT(x)    (((x) & 3) << 1)
 129 #define REG_MUX_AP                REG(0x00, 0x26)     /* read/write */
 130 # define MUX_AP_SELECT_I2S        0x64
 131 # define MUX_AP_SELECT_SPDIF      0x40
 132 #define REG_MUX_VP_VIP_OUT        REG(0x00, 0x27)     /* read/write */
 133 #define REG_MAT_CONTRL            REG(0x00, 0x80)     /* write */
 134 # define MAT_CONTRL_MAT_SC(x)     (((x) & 3) << 0)
 135 # define MAT_CONTRL_MAT_BP        (1 << 2)
 136 #define REG_VIDFORMAT             REG(0x00, 0xa0)     /* write */
 137 #define REG_REFPIX_MSB            REG(0x00, 0xa1)     /* write */
 138 #define REG_REFPIX_LSB            REG(0x00, 0xa2)     /* write */
 139 #define REG_REFLINE_MSB           REG(0x00, 0xa3)     /* write */
 140 #define REG_REFLINE_LSB           REG(0x00, 0xa4)     /* write */
 141 #define REG_NPIX_MSB              REG(0x00, 0xa5)     /* write */
 142 #define REG_NPIX_LSB              REG(0x00, 0xa6)     /* write */
 143 #define REG_NLINE_MSB             REG(0x00, 0xa7)     /* write */
 144 #define REG_NLINE_LSB             REG(0x00, 0xa8)     /* write */
 145 #define REG_VS_LINE_STRT_1_MSB    REG(0x00, 0xa9)     /* write */
 146 #define REG_VS_LINE_STRT_1_LSB    REG(0x00, 0xaa)     /* write */
 147 #define REG_VS_PIX_STRT_1_MSB     REG(0x00, 0xab)     /* write */
 148 #define REG_VS_PIX_STRT_1_LSB     REG(0x00, 0xac)     /* write */
 149 #define REG_VS_LINE_END_1_MSB     REG(0x00, 0xad)     /* write */
 150 #define REG_VS_LINE_END_1_LSB     REG(0x00, 0xae)     /* write */
 151 #define REG_VS_PIX_END_1_MSB      REG(0x00, 0xaf)     /* write */
 152 #define REG_VS_PIX_END_1_LSB      REG(0x00, 0xb0)     /* write */
 153 #define REG_VS_LINE_STRT_2_MSB    REG(0x00, 0xb1)     /* write */
 154 #define REG_VS_LINE_STRT_2_LSB    REG(0x00, 0xb2)     /* write */
 155 #define REG_VS_PIX_STRT_2_MSB     REG(0x00, 0xb3)     /* write */
 156 #define REG_VS_PIX_STRT_2_LSB     REG(0x00, 0xb4)     /* write */
 157 #define REG_VS_LINE_END_2_MSB     REG(0x00, 0xb5)     /* write */
 158 #define REG_VS_LINE_END_2_LSB     REG(0x00, 0xb6)     /* write */
 159 #define REG_VS_PIX_END_2_MSB      REG(0x00, 0xb7)     /* write */
 160 #define REG_VS_PIX_END_2_LSB      REG(0x00, 0xb8)     /* write */
 161 #define REG_HS_PIX_START_MSB      REG(0x00, 0xb9)     /* write */
 162 #define REG_HS_PIX_START_LSB      REG(0x00, 0xba)     /* write */
 163 #define REG_HS_PIX_STOP_MSB       REG(0x00, 0xbb)     /* write */
 164 #define REG_HS_PIX_STOP_LSB       REG(0x00, 0xbc)     /* write */
 165 #define REG_VWIN_START_1_MSB      REG(0x00, 0xbd)     /* write */
 166 #define REG_VWIN_START_1_LSB      REG(0x00, 0xbe)     /* write */
 167 #define REG_VWIN_END_1_MSB        REG(0x00, 0xbf)     /* write */
 168 #define REG_VWIN_END_1_LSB        REG(0x00, 0xc0)     /* write */
 169 #define REG_VWIN_START_2_MSB      REG(0x00, 0xc1)     /* write */
 170 #define REG_VWIN_START_2_LSB      REG(0x00, 0xc2)     /* write */
 171 #define REG_VWIN_END_2_MSB        REG(0x00, 0xc3)     /* write */
 172 #define REG_VWIN_END_2_LSB        REG(0x00, 0xc4)     /* write */
 173 #define REG_DE_START_MSB          REG(0x00, 0xc5)     /* write */
 174 #define REG_DE_START_LSB          REG(0x00, 0xc6)     /* write */
 175 #define REG_DE_STOP_MSB           REG(0x00, 0xc7)     /* write */
 176 #define REG_DE_STOP_LSB           REG(0x00, 0xc8)     /* write */
 177 #define REG_TBG_CNTRL_0           REG(0x00, 0xca)     /* write */
 178 # define TBG_CNTRL_0_TOP_TGL      (1 << 0)
 179 # define TBG_CNTRL_0_TOP_SEL      (1 << 1)
 180 # define TBG_CNTRL_0_DE_EXT       (1 << 2)
 181 # define TBG_CNTRL_0_TOP_EXT      (1 << 3)
 182 # define TBG_CNTRL_0_FRAME_DIS    (1 << 5)
 183 # define TBG_CNTRL_0_SYNC_MTHD    (1 << 6)
 184 # define TBG_CNTRL_0_SYNC_ONCE    (1 << 7)
 185 #define REG_TBG_CNTRL_1           REG(0x00, 0xcb)     /* write */
 186 # define TBG_CNTRL_1_H_TGL        (1 << 0)
 187 # define TBG_CNTRL_1_V_TGL        (1 << 1)
 188 # define TBG_CNTRL_1_TGL_EN       (1 << 2)
 189 # define TBG_CNTRL_1_X_EXT        (1 << 3)
 190 # define TBG_CNTRL_1_H_EXT        (1 << 4)
 191 # define TBG_CNTRL_1_V_EXT        (1 << 5)
 192 # define TBG_CNTRL_1_DWIN_DIS     (1 << 6)
 193 #define REG_ENABLE_SPACE          REG(0x00, 0xd6)     /* write */
 194 #define REG_HVF_CNTRL_0           REG(0x00, 0xe4)     /* write */
 195 # define HVF_CNTRL_0_SM           (1 << 7)
 196 # define HVF_CNTRL_0_RWB          (1 << 6)
 197 # define HVF_CNTRL_0_PREFIL(x)    (((x) & 3) << 2)
 198 # define HVF_CNTRL_0_INTPOL(x)    (((x) & 3) << 0)
 199 #define REG_HVF_CNTRL_1           REG(0x00, 0xe5)     /* write */
 200 # define HVF_CNTRL_1_FOR          (1 << 0)
 201 # define HVF_CNTRL_1_YUVBLK       (1 << 1)
 202 # define HVF_CNTRL_1_VQR(x)       (((x) & 3) << 2)
 203 # define HVF_CNTRL_1_PAD(x)       (((x) & 3) << 4)
 204 # define HVF_CNTRL_1_SEMI_PLANAR  (1 << 6)
 205 #define REG_RPT_CNTRL             REG(0x00, 0xf0)     /* write */
 206 #define REG_I2S_FORMAT            REG(0x00, 0xfc)     /* read/write */
 207 # define I2S_FORMAT(x)            (((x) & 3) << 0)
 208 #define REG_AIP_CLKSEL            REG(0x00, 0xfd)     /* write */
 209 # define AIP_CLKSEL_AIP_SPDIF     (0 << 3)
 210 # define AIP_CLKSEL_AIP_I2S       (1 << 3)
 211 # define AIP_CLKSEL_FS_ACLK       (0 << 0)
 212 # define AIP_CLKSEL_FS_MCLK       (1 << 0)
 213 # define AIP_CLKSEL_FS_FS64SPDIF  (2 << 0)
 214
 215 /* Page 02h: PLL settings */
 216 #define REG_PLL_SERIAL_1          REG(0x02, 0x00)     /* read/write */
 217 # define PLL_SERIAL_1_SRL_FDN     (1 << 0)
 218 # define PLL_SERIAL_1_SRL_IZ(x)   (((x) & 3) << 1)
 219 # define PLL_SERIAL_1_SRL_MAN_IZ  (1 << 6)
 220 #define REG_PLL_SERIAL_2          REG(0x02, 0x01)     /* read/write */
 221 # define PLL_SERIAL_2_SRL_NOSC(x) ((x) << 0)
 222 # define PLL_SERIAL_2_SRL_PR(x)   (((x) & 0xf) << 4)
 223 #define REG_PLL_SERIAL_3          REG(0x02, 0x02)     /* read/write */
 224 # define PLL_SERIAL_3_SRL_CCIR    (1 << 0)
 225 # define PLL_SERIAL_3_SRL_DE      (1 << 2)
 226 # define PLL_SERIAL_3_SRL_PXIN_SEL (1 << 4)
 227 #define REG_SERIALIZER            REG(0x02, 0x03)     /* read/write */
 228 #define REG_BUFFER_OUT            REG(0x02, 0x04)     /* read/write */
 229 #define REG_PLL_SCG1              REG(0x02, 0x05)     /* read/write */
 230 #define REG_PLL_SCG2              REG(0x02, 0x06)     /* read/write */
 231 #define REG_PLL_SCGN1             REG(0x02, 0x07)     /* read/write */
 232 #define REG_PLL_SCGN2             REG(0x02, 0x08)     /* read/write */
 233 #define REG_PLL_SCGR1             REG(0x02, 0x09)     /* read/write */
 234 #define REG_PLL_SCGR2             REG(0x02, 0x0a)     /* read/write */
 235 #define REG_AUDIO_DIV             REG(0x02, 0x0e)     /* read/write */
 236 # define AUDIO_DIV_SERCLK_1       0
 237 # define AUDIO_DIV_SERCLK_2       1
 238 # define AUDIO_DIV_SERCLK_4       2
 239 # define AUDIO_DIV_SERCLK_8       3
 240 # define AUDIO_DIV_SERCLK_16      4
 241 # define AUDIO_DIV_SERCLK_32      5
 242 #define REG_SEL_CLK               REG(0x02, 0x11)     /* read/write */
 243 # define SEL_CLK_SEL_CLK1         (1 << 0)
 244 # define SEL_CLK_SEL_VRF_CLK(x)   (((x) & 3) << 1)
 245 # define SEL_CLK_ENA_SC_CLK       (1 << 3)
 246 #define REG_ANA_GENERAL           REG(0x02, 0x12)     /* read/write */
 247
 248
 249 /* Page 09h: EDID Control */
 250 #define REG_EDID_DATA_0           REG(0x09, 0x00)     /* read */
 251 /* next 127 successive registers are the EDID block */
 252 #define REG_EDID_CTRL             REG(0x09, 0xfa)     /* read/write */
 253 #define REG_DDC_ADDR              REG(0x09, 0xfb)     /* read/write */
 254 #define REG_DDC_OFFS              REG(0x09, 0xfc)     /* read/write */
 255 #define REG_DDC_SEGM_ADDR         REG(0x09, 0xfd)     /* read/write */
 256 #define REG_DDC_SEGM              REG(0x09, 0xfe)     /* read/write */
 257
 258
 259 /* Page 10h: information frames and packets */
 260 #define REG_IF1_HB0               REG(0x10, 0x20)     /* read/write */
 261 #define REG_IF2_HB0               REG(0x10, 0x40)     /* read/write */
 262 #define REG_IF3_HB0               REG(0x10, 0x60)     /* read/write */
 263 #define REG_IF4_HB0               REG(0x10, 0x80)     /* read/write */
 264 #define REG_IF5_HB0               REG(0x10, 0xa0)     /* read/write */
 265
 266
 267 /* Page 11h: audio settings and content info packets */
 268 #define REG_AIP_CNTRL_0           REG(0x11, 0x00)     /* read/write */
 269 # define AIP_CNTRL_0_RST_FIFO     (1 << 0)
 270 # define AIP_CNTRL_0_SWAP         (1 << 1)
 271 # define AIP_CNTRL_0_LAYOUT       (1 << 2)
 272 # define AIP_CNTRL_0_ACR_MAN      (1 << 5)
 273 # define AIP_CNTRL_0_RST_CTS      (1 << 6)
 274 #define REG_CA_I2S                REG(0x11, 0x01)     /* read/write */
 275 # define CA_I2S_CA_I2S(x)         (((x) & 31) << 0)
 276 # define CA_I2S_HBR_CHSTAT        (1 << 6)
 277 #define REG_LATENCY_RD            REG(0x11, 0x04)     /* read/write */
 278 #define REG_ACR_CTS_0             REG(0x11, 0x05)     /* read/write */
 279 #define REG_ACR_CTS_1             REG(0x11, 0x06)     /* read/write */
 280 #define REG_ACR_CTS_2             REG(0x11, 0x07)     /* read/write */
 281 #define REG_ACR_N_0               REG(0x11, 0x08)     /* read/write */
 282 #define REG_ACR_N_1               REG(0x11, 0x09)     /* read/write */
 283 #define REG_ACR_N_2               REG(0x11, 0x0a)     /* read/write */
 284 #define REG_CTS_N                 REG(0x11, 0x0c)     /* read/write */
 285 # define CTS_N_K(x)               (((x) & 7) << 0)
 286 # define CTS_N_M(x)               (((x) & 3) << 4)
 287 #define REG_ENC_CNTRL             REG(0x11, 0x0d)     /* read/write */
 288 # define ENC_CNTRL_RST_ENC        (1 << 0)
 289 # define ENC_CNTRL_RST_SEL        (1 << 1)
 290 # define ENC_CNTRL_CTL_CODE(x)    (((x) & 3) << 2)
 291 #define REG_DIP_FLAGS             REG(0x11, 0x0e)     /* read/write */
 292 # define DIP_FLAGS_ACR            (1 << 0)
 293 # define DIP_FLAGS_GC             (1 << 1)
 294 #define REG_DIP_IF_FLAGS          REG(0x11, 0x0f)     /* read/write */
 295 # define DIP_IF_FLAGS_IF1         (1 << 1)
 296 # define DIP_IF_FLAGS_IF2         (1 << 2)
 297 # define DIP_IF_FLAGS_IF3         (1 << 3)
 298 # define DIP_IF_FLAGS_IF4         (1 << 4)
 299 # define DIP_IF_FLAGS_IF5         (1 << 5)
 300 #define REG_CH_STAT_B(x)          REG(0x11, 0x14 + (x)) /* read/write */
 301
 302
 303 /* Page 12h: HDCP and OTP */
 304 #define REG_TX3                   REG(0x12, 0x9a)     /* read/write */
 305 #define REG_TX4                   REG(0x12, 0x9b)     /* read/write */
 306 # define TX4_PD_RAM               (1 << 1)
 307 #define REG_TX33                  REG(0x12, 0xb8)     /* read/write */
 308 # define TX33_HDMI                (1 << 1)
 309
 310
 311 /* Page 13h: Gamut related metadata packets */
 312
 313
 314
 315 /* CEC registers: (not paged)
 316  */
 317 #define REG_CEC_INTSTATUS         0xee                /* read */
 318 # define CEC_INTSTATUS_CEC        (1 << 0)
 319 # define CEC_INTSTATUS_HDMI       (1 << 1)
 320 #define REG_CEC_FRO_IM_CLK_CTRL   0xfb                /* read/write */
 321 # define CEC_FRO_IM_CLK_CTRL_GHOST_DIS (1 << 7)
 322 # define CEC_FRO_IM_CLK_CTRL_ENA_OTP   (1 << 6)
 323 # define CEC_FRO_IM_CLK_CTRL_IMCLK_SEL (1 << 1)
 324 # define CEC_FRO_IM_CLK_CTRL_FRO_DIV   (1 << 0)
 325 #define REG_CEC_RXSHPDINTENA      0xfc                /* read/write */
 326 #define REG_CEC_RXSHPDINT         0xfd                /* read */
 327 #define REG_CEC_RXSHPDLEV         0xfe                /* read */
 328 # define CEC_RXSHPDLEV_RXSENS     (1 << 0)
 329 # define CEC_RXSHPDLEV_HPD        (1 << 1)
 330
 331 #define REG_CEC_ENAMODS           0xff                /* read/write */
 332 # define CEC_ENAMODS_DIS_FRO      (1 << 6)
 333 # define CEC_ENAMODS_DIS_CCLK     (1 << 5)
 334 # define CEC_ENAMODS_EN_RXSENS    (1 << 2)
 335 # define CEC_ENAMODS_EN_HDMI      (1 << 1)
 336 # define CEC_ENAMODS_EN_CEC       (1 << 0)
 337
 338
 339 /* Device versions: */
 340 #define TDA9989N2                 0x0101
 341 #define TDA19989                  0x0201
 342 #define TDA19989N2                0x0202
 343 #define TDA19988                  0x0301
 344
 345 static void
 346 cec_write(struct tda998x_priv *priv, uint16_t addr, uint8_t val)
 347 {
 348         struct i2c_client *client = priv->cec;
 349         uint8_t buf[] = {addr, val};
 350         int ret;
 351
 352         ret = i2c_master_send(client, buf, sizeof(buf));
 353         if (ret < 0)
 354                 dev_err(&client->dev, "Error %d writing to cec:0x%x\n", ret, addr);
 355 }
 356
 357 static uint8_t
 358 cec_read(struct tda998x_priv *priv, uint8_t addr)
 359 {
 360         struct i2c_client *client = priv->cec;
 361         uint8_t val;
 362         int ret;
 363
 364         ret = i2c_master_send(client, &addr, sizeof(addr));
 365         if (ret < 0)
 366                 goto fail;
 367
 368         ret = i2c_master_recv(client, &val, sizeof(val));
 369         if (ret < 0)
 370                 goto fail;
 371
 372         return val;
 373
 374 fail:
 375         dev_err(&client->dev, "Error %d reading from cec:0x%x\n", ret, addr);
 376         return 0;
 377 }
 378
 379 static int
 380 set_page(struct tda998x_priv *priv, uint16_t reg)
 381 {
 382         if (REG2PAGE(reg) != priv->current_page) {
 383                 struct i2c_client *client = priv->hdmi;
 384                 uint8_t buf[] = {
 385                                 REG_CURPAGE, REG2PAGE(reg)
 386                 };
 387                 int ret = i2c_master_send(client, buf, sizeof(buf));
 388                 if (ret < 0) {
 389                         dev_err(&client->dev, "setpage %04x err %d\n",
 390                                         reg, ret);
 391                         return ret;
 392                 }
 393
 394                 priv->current_page = REG2PAGE(reg);
 395         }
 396         return 0;
 397 }
 398
 399 static int
 400 reg_read_range(struct tda998x_priv *priv, uint16_t reg, char *buf, int cnt)
 401 {
 402         struct i2c_client *client = priv->hdmi;
 403         uint8_t addr = REG2ADDR(reg);
 404         int ret;
 405
 406         ret = set_page(priv, reg);
 407         if (ret < 0)
 408                 return ret;
 409
 410         ret = i2c_master_send(client, &addr, sizeof(addr));
 411         if (ret < 0)
 412                 goto fail;
 413
 414         ret = i2c_master_recv(client, buf, cnt);
 415         if (ret < 0)
 416                 goto fail;
 417
 418         return ret;
 419
 420 fail:
 421         dev_err(&client->dev, "Error %d reading from 0x%x\n", ret, reg);
 422         return ret;
 423 }
 424
 425 static void
 426 reg_write_range(struct tda998x_priv *priv, uint16_t reg, uint8_t *p, int cnt)
 427 {
 428         struct i2c_client *client = priv->hdmi;
 429         uint8_t buf[cnt+1];
 430         int ret;
 431
 432         buf[0] = REG2ADDR(reg);
 433         memcpy(&buf[1], p, cnt);
 434
 435         ret = set_page(priv, reg);
 436         if (ret < 0)
 437                 return;
 438
 439         ret = i2c_master_send(client, buf, cnt + 1);
 440         if (ret < 0)
 441                 dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
 442 }
 443
 444 static int
 445 reg_read(struct tda998x_priv *priv, uint16_t reg)
 446 {
 447         uint8_t val = 0;
 448         int ret;
 449
 450         ret = reg_read_range(priv, reg, &val, sizeof(val));
 451         if (ret < 0)
 452                 return ret;
 453         return val;
 454 }
 455
 456 static void
 457 reg_write(struct tda998x_priv *priv, uint16_t reg, uint8_t val)
 458 {
 459         struct i2c_client *client = priv->hdmi;
 460         uint8_t buf[] = {REG2ADDR(reg), val};
 461         int ret;
 462
 463         ret = set_page(priv, reg);
 464         if (ret < 0)
 465                 return;
 466
 467         ret = i2c_master_send(client, buf, sizeof(buf));
 468         if (ret < 0)
 469                 dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
 470 }
 471
 472 static void
 473 reg_write16(struct tda998x_priv *priv, uint16_t reg, uint16_t val)
 474 {
 475         struct i2c_client *client = priv->hdmi;
 476         uint8_t buf[] = {REG2ADDR(reg), val >> 8, val};
 477         int ret;
 478
 479         ret = set_page(priv, reg);
 480         if (ret < 0)
 481                 return;
 482
 483         ret = i2c_master_send(client, buf, sizeof(buf));
 484         if (ret < 0)
 485                 dev_err(&client->dev, "Error %d writing to 0x%x\n", ret, reg);
 486 }
 487
 488 static void
 489 reg_set(struct tda998x_priv *priv, uint16_t reg, uint8_t val)
 490 {
 491         int old_val;
 492
 493         old_val = reg_read(priv, reg);
 494         if (old_val >= 0)
 495                 reg_write(priv, reg, old_val | val);
 496 }
 497
 498 static void
 499 reg_clear(struct tda998x_priv *priv, uint16_t reg, uint8_t val)
 500 {
 501         int old_val;
 502
 503         old_val = reg_read(priv, reg);
 504         if (old_val >= 0)
 505                 reg_write(priv, reg, old_val & ~val);
 506 }
 507
 508 static void
 509 tda998x_reset(struct tda998x_priv *priv)
 510 {
 511         /* reset audio and i2c master: */
 512         reg_write(priv, REG_SOFTRESET, SOFTRESET_AUDIO | SOFTRESET_I2C_MASTER);
 513         msleep(50);
 514         reg_write(priv, REG_SOFTRESET, 0);
 515         msleep(50);
 516
 517         /* reset transmitter: */
 518         reg_set(priv, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
 519         reg_clear(priv, REG_MAIN_CNTRL0, MAIN_CNTRL0_SR);
 520
 521         /* PLL registers common configuration */
 522         reg_write(priv, REG_PLL_SERIAL_1, 0x00);
 523         reg_write(priv, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(1));
 524         reg_write(priv, REG_PLL_SERIAL_3, 0x00);
 525         reg_write(priv, REG_SERIALIZER,   0x00);
 526         reg_write(priv, REG_BUFFER_OUT,   0x00);
 527         reg_write(priv, REG_PLL_SCG1,     0x00);
 528         reg_write(priv, REG_AUDIO_DIV,    AUDIO_DIV_SERCLK_8);
 529         reg_write(priv, REG_SEL_CLK,      SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
 530         reg_write(priv, REG_PLL_SCGN1,    0xfa);
 531         reg_write(priv, REG_PLL_SCGN2,    0x00);
 532         reg_write(priv, REG_PLL_SCGR1,    0x5b);
 533         reg_write(priv, REG_PLL_SCGR2,    0x00);
 534         reg_write(priv, REG_PLL_SCG2,     0x10);
 535
 536         /* Write the default value MUX register */
 537         reg_write(priv, REG_MUX_VP_VIP_OUT, 0x24);
 538 }
 539
 540 /*
 541  * only 2 interrupts may occur: screen plug/unplug and EDID read
 542  */
 543 static irqreturn_t tda998x_irq_thread(int irq, void *data)
 544 {
 545         struct tda998x_priv *priv = data;
 546         u8 sta, cec, lvl, flag0, flag1, flag2;
 547
 548         if (!priv)
 549                 return IRQ_HANDLED;
 550         sta = cec_read(priv, REG_CEC_INTSTATUS);
 551         cec = cec_read(priv, REG_CEC_RXSHPDINT);
 552         lvl = cec_read(priv, REG_CEC_RXSHPDLEV);
 553         flag0 = reg_read(priv, REG_INT_FLAGS_0);
 554         flag1 = reg_read(priv, REG_INT_FLAGS_1);
 555         flag2 = reg_read(priv, REG_INT_FLAGS_2);
 556         DRM_DEBUG_DRIVER(
 557                 "tda irq sta %02x cec %02x lvl %02x f0 %02x f1 %02x f2 %02x\n",
 558                 sta, cec, lvl, flag0, flag1, flag2);
 559         if ((flag2 & INT_FLAGS_2_EDID_BLK_RD) && priv->wq_edid_wait) {
 560                 priv->wq_edid_wait = 0;
 561                 wake_up(&priv->wq_edid);
 562         } else if (cec != 0) {                  /* HPD change */
 563                 if (priv->encoder && priv->encoder->dev)
 564                         drm_helper_hpd_irq_event(priv->encoder->dev);
 565         }
 566         return IRQ_HANDLED;
 567 }
 568
 569 static uint8_t tda998x_cksum(uint8_t *buf, size_t bytes)
 570 {
 571         int sum = 0;
 572
 573         while (bytes--)
 574                 sum -= *buf++;
 575         return sum;
 576 }
 577
 578 #define HB(x) (x)
 579 #define PB(x) (HB(2) + 1 + (x))
 580
 581 static void
 582 tda998x_write_if(struct tda998x_priv *priv, uint8_t bit, uint16_t addr,
 583                  uint8_t *buf, size_t size)
 584 {
 585         buf[PB(0)] = tda998x_cksum(buf, size);
 586
 587         reg_clear(priv, REG_DIP_IF_FLAGS, bit);
 588         reg_write_range(priv, addr, buf, size);
 589         reg_set(priv, REG_DIP_IF_FLAGS, bit);
 590 }
 591
 592 static void
 593 tda998x_write_aif(struct tda998x_priv *priv, struct tda998x_encoder_params *p)
 594 {
 595         u8 buf[PB(HDMI_AUDIO_INFOFRAME_SIZE) + 1];
 596
 597         memset(buf, 0, sizeof(buf));
 598         buf[HB(0)] = HDMI_INFOFRAME_TYPE_AUDIO;
 599         buf[HB(1)] = 0x01;
 600         buf[HB(2)] = HDMI_AUDIO_INFOFRAME_SIZE;
 601         buf[PB(1)] = p->audio_frame[1] & 0x07; /* CC */
 602         buf[PB(2)] = p->audio_frame[2] & 0x1c; /* SF */
 603         buf[PB(4)] = p->audio_frame[4];
 604         buf[PB(5)] = p->audio_frame[5] & 0xf8; /* DM_INH + LSV */
 605
 606         tda998x_write_if(priv, DIP_IF_FLAGS_IF4, REG_IF4_HB0, buf,
 607                          sizeof(buf));
 608 }
 609
 610 static void
 611 tda998x_write_avi(struct tda998x_priv *priv, struct drm_display_mode *mode)
 612 {
 613         u8 buf[PB(HDMI_AVI_INFOFRAME_SIZE) + 1];
 614
 615         memset(buf, 0, sizeof(buf));
 616         buf[HB(0)] = HDMI_INFOFRAME_TYPE_AVI;
 617         buf[HB(1)] = 0x02;
 618         buf[HB(2)] = HDMI_AVI_INFOFRAME_SIZE;
 619         buf[PB(1)] = HDMI_SCAN_MODE_UNDERSCAN;
 620         buf[PB(2)] = HDMI_ACTIVE_ASPECT_PICTURE;
 621         buf[PB(3)] = HDMI_QUANTIZATION_RANGE_FULL << 2;
 622         buf[PB(4)] = drm_match_cea_mode(mode);
 623
 624         tda998x_write_if(priv, DIP_IF_FLAGS_IF2, REG_IF2_HB0, buf,
 625                          sizeof(buf));
 626 }
 627
 628 static void tda998x_audio_mute(struct tda998x_priv *priv, bool on)
 629 {
 630         if (on) {
 631                 reg_set(priv, REG_SOFTRESET, SOFTRESET_AUDIO);
 632                 reg_clear(priv, REG_SOFTRESET, SOFTRESET_AUDIO);
 633                 reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
 634         } else {
 635                 reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
 636         }
 637 }
 638
 639 static void
 640 tda998x_configure_audio(struct tda998x_priv *priv,
 641                 struct drm_display_mode *mode, struct tda998x_encoder_params *p)
 642 {
 643         uint8_t buf[6], clksel_aip, clksel_fs, cts_n, adiv;
 644         uint32_t n;
 645
 646         /* Enable audio ports */
 647         reg_write(priv, REG_ENA_AP, p->audio_cfg);
 648         reg_write(priv, REG_ENA_ACLK, p->audio_clk_cfg);
 649
 650         /* Set audio input source */
 651         switch (p->audio_format) {
 652         case AFMT_SPDIF:
 653                 reg_write(priv, REG_MUX_AP, MUX_AP_SELECT_SPDIF);
 654                 clksel_aip = AIP_CLKSEL_AIP_SPDIF;
 655                 clksel_fs = AIP_CLKSEL_FS_FS64SPDIF;
 656                 cts_n = CTS_N_M(3) | CTS_N_K(3);
 657                 break;
 658
 659         case AFMT_I2S:
 660                 reg_write(priv, REG_MUX_AP, MUX_AP_SELECT_I2S);
 661                 clksel_aip = AIP_CLKSEL_AIP_I2S;
 662                 clksel_fs = AIP_CLKSEL_FS_ACLK;
 663                 cts_n = CTS_N_M(3) | CTS_N_K(3);
 664                 break;
 665
 666         default:
 667                 BUG();
 668                 return;
 669         }
 670
 671         reg_write(priv, REG_AIP_CLKSEL, clksel_aip);
 672         reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_LAYOUT |
 673                                         AIP_CNTRL_0_ACR_MAN);   /* auto CTS */
 674         reg_write(priv, REG_CTS_N, cts_n);
 675
 676         /*
 677          * Audio input somehow depends on HDMI line rate which is
 678          * related to pixclk. Testing showed that modes with pixclk
 679          * >100MHz need a larger divider while <40MHz need the default.
 680          * There is no detailed info in the datasheet, so we just
 681          * assume 100MHz requires larger divider.
 682          */
 683         adiv = AUDIO_DIV_SERCLK_8;
 684         if (mode->clock > 100000)
 685                 adiv++;                 /* AUDIO_DIV_SERCLK_16 */
 686
 687         /* S/PDIF asks for a larger divider */
 688         if (p->audio_format == AFMT_SPDIF)
 689                 adiv++;                 /* AUDIO_DIV_SERCLK_16 or _32 */
 690
 691         reg_write(priv, REG_AUDIO_DIV, adiv);
 692
 693         /*
 694          * This is the approximate value of N, which happens to be
 695          * the recommended values for non-coherent clocks.
 696          */
 697         n = 128 * p->audio_sample_rate / 1000;
 698
 699         /* Write the CTS and N values */
 700         buf[0] = 0x44;
 701         buf[1] = 0x42;
 702         buf[2] = 0x01;
 703         buf[3] = n;
 704         buf[4] = n >> 8;
 705         buf[5] = n >> 16;
 706         reg_write_range(priv, REG_ACR_CTS_0, buf, 6);
 707
 708         /* Set CTS clock reference */
 709         reg_write(priv, REG_AIP_CLKSEL, clksel_aip | clksel_fs);
 710
 711         /* Reset CTS generator */
 712         reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
 713         reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
 714
 715         /* Write the channel status */
 716         buf[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
 717         buf[1] = 0x00;
 718         buf[2] = IEC958_AES3_CON_FS_NOTID;
 719         buf[3] = IEC958_AES4_CON_ORIGFS_NOTID |
 720                         IEC958_AES4_CON_MAX_WORDLEN_24;
 721         reg_write_range(priv, REG_CH_STAT_B(0), buf, 4);
 722
 723         tda998x_audio_mute(priv, true);
 724         msleep(20);
 725         tda998x_audio_mute(priv, false);
 726
 727         /* Write the audio information packet */
 728         tda998x_write_aif(priv, p);
 729 }
 730
 731 /* DRM encoder functions */
 732
 733 static void
 734 tda998x_encoder_set_config(struct drm_encoder *encoder, void *params)
 735 {
 736         struct tda998x_priv *priv = to_tda998x_priv(encoder);
 737         struct tda998x_encoder_params *p = params;
 738
 739         priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(p->swap_a) |
 740                             (p->mirr_a ? VIP_CNTRL_0_MIRR_A : 0) |
 741                             VIP_CNTRL_0_SWAP_B(p->swap_b) |
 742                             (p->mirr_b ? VIP_CNTRL_0_MIRR_B : 0);
 743         priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(p->swap_c) |
 744                             (p->mirr_c ? VIP_CNTRL_1_MIRR_C : 0) |
 745                             VIP_CNTRL_1_SWAP_D(p->swap_d) |
 746                             (p->mirr_d ? VIP_CNTRL_1_MIRR_D : 0);
 747         priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(p->swap_e) |
 748                             (p->mirr_e ? VIP_CNTRL_2_MIRR_E : 0) |
 749                             VIP_CNTRL_2_SWAP_F(p->swap_f) |
 750                             (p->mirr_f ? VIP_CNTRL_2_MIRR_F : 0);
 751
 752         priv->params = *p;
 753 }
 754
 755 static void
 756 tda998x_encoder_dpms(struct drm_encoder *encoder, int mode)
 757 {
 758         struct tda998x_priv *priv = to_tda998x_priv(encoder);
 759
 760         /* we only care about on or off: */
 761         if (mode != DRM_MODE_DPMS_ON)
 762                 mode = DRM_MODE_DPMS_OFF;
 763
 764         if (mode == priv->dpms)
 765                 return;
 766
 767         switch (mode) {
 768         case DRM_MODE_DPMS_ON:
 769                 /* enable video ports, audio will be enabled later */
 770                 reg_write(priv, REG_ENA_VP_0, 0xff);
 771                 reg_write(priv, REG_ENA_VP_1, 0xff);
 772                 reg_write(priv, REG_ENA_VP_2, 0xff);
 773                 /* set muxing after enabling ports: */
 774                 reg_write(priv, REG_VIP_CNTRL_0, priv->vip_cntrl_0);
 775                 reg_write(priv, REG_VIP_CNTRL_1, priv->vip_cntrl_1);
 776                 reg_write(priv, REG_VIP_CNTRL_2, priv->vip_cntrl_2);
 777                 break;
 778         case DRM_MODE_DPMS_OFF:
 779                 /* disable video ports */
 780                 reg_write(priv, REG_ENA_VP_0, 0x00);
 781                 reg_write(priv, REG_ENA_VP_1, 0x00);
 782                 reg_write(priv, REG_ENA_VP_2, 0x00);
 783                 break;
 784         }
 785
 786         priv->dpms = mode;
 787 }
 788
 789 static void
 790 tda998x_encoder_save(struct drm_encoder *encoder)
 791 {
 792         DBG("");
 793 }
 794
 795 static void
 796 tda998x_encoder_restore(struct drm_encoder *encoder)
 797 {
 798         DBG("");
 799 }
 800
 801 static bool
 802 tda998x_encoder_mode_fixup(struct drm_encoder *encoder,
 803                           const struct drm_display_mode *mode,
 804                           struct drm_display_mode *adjusted_mode)
 805 {
 806         return true;
 807 }
 808
 809 static int
 810 tda998x_encoder_mode_valid(struct drm_encoder *encoder,
 811                           struct drm_display_mode *mode)
 812 {
 813         if (mode->clock > 150000)
 814                 return MODE_CLOCK_HIGH;
 815         if (mode->htotal >= BIT(13))
 816                 return MODE_BAD_HVALUE;
 817         if (mode->vtotal >= BIT(11))
 818                 return MODE_BAD_VVALUE;
 819         return MODE_OK;
 820 }
 821
 822 static void
 823 tda998x_encoder_mode_set(struct drm_encoder *encoder,
 824                         struct drm_display_mode *mode,
 825                         struct drm_display_mode *adjusted_mode)
 826 {
 827         struct tda998x_priv *priv = to_tda998x_priv(encoder);
 828         uint16_t ref_pix, ref_line, n_pix, n_line;
 829         uint16_t hs_pix_s, hs_pix_e;
 830         uint16_t vs1_pix_s, vs1_pix_e, vs1_line_s, vs1_line_e;
 831         uint16_t vs2_pix_s, vs2_pix_e, vs2_line_s, vs2_line_e;
 832         uint16_t vwin1_line_s, vwin1_line_e;
 833         uint16_t vwin2_line_s, vwin2_line_e;
 834         uint16_t de_pix_s, de_pix_e;
 835         uint8_t reg, div, rep;
 836
 837         /*
 838          * Internally TDA998x is using ITU-R BT.656 style sync but
 839          * we get VESA style sync. TDA998x is using a reference pixel
 840          * relative to ITU to sync to the input frame and for output
 841          * sync generation. Currently, we are using reference detection
 842          * from HS/VS, i.e. REFPIX/REFLINE denote frame start sync point
 843          * which is position of rising VS with coincident rising HS.
 844          *
 845          * Now there is some issues to take care of:
 846          * - HDMI data islands require sync-before-active
 847          * - TDA998x register values must be > 0 to be enabled
 848          * - REFLINE needs an additional offset of +1
 849          * - REFPIX needs an addtional offset of +1 for UYUV and +3 for RGB
 850          *
 851          * So we add +1 to all horizontal and vertical register values,
 852          * plus an additional +3 for REFPIX as we are using RGB input only.
 853          */
 854         n_pix        = mode->htotal;
 855         n_line       = mode->vtotal;
 856
 857         hs_pix_e     = mode->hsync_end - mode->hdisplay;
 858         hs_pix_s     = mode->hsync_start - mode->hdisplay;
 859         de_pix_e     = mode->htotal;
 860         de_pix_s     = mode->htotal - mode->hdisplay;
 861         ref_pix      = 3 + hs_pix_s;
 862
 863         /*
 864          * Attached LCD controllers may generate broken sync. Allow
 865          * those to adjust the position of the rising VS edge by adding
 866          * HSKEW to ref_pix.
 867          */
 868         if (adjusted_mode->flags & DRM_MODE_FLAG_HSKEW)
 869                 ref_pix += adjusted_mode->hskew;
 870
 871         if ((mode->flags & DRM_MODE_FLAG_INTERLACE) == 0) {
 872                 ref_line     = 1 + mode->vsync_start - mode->vdisplay;
 873                 vwin1_line_s = mode->vtotal - mode->vdisplay - 1;
 874                 vwin1_line_e = vwin1_line_s + mode->vdisplay;
 875                 vs1_pix_s    = vs1_pix_e = hs_pix_s;
 876                 vs1_line_s   = mode->vsync_start - mode->vdisplay;
 877                 vs1_line_e   = vs1_line_s +
 878                                mode->vsync_end - mode->vsync_start;
 879                 vwin2_line_s = vwin2_line_e = 0;
 880                 vs2_pix_s    = vs2_pix_e  = 0;
 881                 vs2_line_s   = vs2_line_e = 0;
 882         } else {
 883                 ref_line     = 1 + (mode->vsync_start - mode->vdisplay)/2;
 884                 vwin1_line_s = (mode->vtotal - mode->vdisplay)/2;
 885                 vwin1_line_e = vwin1_line_s + mode->vdisplay/2;
 886                 vs1_pix_s    = vs1_pix_e = hs_pix_s;
 887                 vs1_line_s   = (mode->vsync_start - mode->vdisplay)/2;
 888                 vs1_line_e   = vs1_line_s +
 889                                (mode->vsync_end - mode->vsync_start)/2;
 890                 vwin2_line_s = vwin1_line_s + mode->vtotal/2;
 891                 vwin2_line_e = vwin2_line_s + mode->vdisplay/2;
 892                 vs2_pix_s    = vs2_pix_e = hs_pix_s + mode->htotal/2;
 893                 vs2_line_s   = vs1_line_s + mode->vtotal/2 ;
 894                 vs2_line_e   = vs2_line_s +
 895                                (mode->vsync_end - mode->vsync_start)/2;
 896         }
 897
 898         div = 148500 / mode->clock;
 899         if (div != 0) {
 900                 div--;
 901                 if (div > 3)
 902                         div = 3;
 903         }
 904
 905         /* mute the audio FIFO: */
 906         reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_FIFO);
 907
 908         /* set HDMI HDCP mode off: */
 909         reg_write(priv, REG_TBG_CNTRL_1, TBG_CNTRL_1_DWIN_DIS);
 910         reg_clear(priv, REG_TX33, TX33_HDMI);
 911         reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(0));
 912
 913         /* no pre-filter or interpolator: */
 914         reg_write(priv, REG_HVF_CNTRL_0, HVF_CNTRL_0_PREFIL(0) |
 915                         HVF_CNTRL_0_INTPOL(0));
 916         reg_write(priv, REG_VIP_CNTRL_5, VIP_CNTRL_5_SP_CNT(0));
 917         reg_write(priv, REG_VIP_CNTRL_4, VIP_CNTRL_4_BLANKIT(0) |
 918                         VIP_CNTRL_4_BLC(0));
 919
 920         reg_clear(priv, REG_PLL_SERIAL_1, PLL_SERIAL_1_SRL_MAN_IZ);
 921         reg_clear(priv, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_CCIR |
 922                                           PLL_SERIAL_3_SRL_DE);
 923         reg_write(priv, REG_SERIALIZER, 0);
 924         reg_write(priv, REG_HVF_CNTRL_1, HVF_CNTRL_1_VQR(0));
 925
 926         /* TODO enable pixel repeat for pixel rates less than 25Msamp/s */
 927         rep = 0;
 928         reg_write(priv, REG_RPT_CNTRL, 0);
 929         reg_write(priv, REG_SEL_CLK, SEL_CLK_SEL_VRF_CLK(0) |
 930                         SEL_CLK_SEL_CLK1 | SEL_CLK_ENA_SC_CLK);
 931
 932         reg_write(priv, REG_PLL_SERIAL_2, PLL_SERIAL_2_SRL_NOSC(div) |
 933                         PLL_SERIAL_2_SRL_PR(rep));
 934
 935         /* set color matrix bypass flag: */
 936         reg_write(priv, REG_MAT_CONTRL, MAT_CONTRL_MAT_BP |
 937                                 MAT_CONTRL_MAT_SC(1));
 938
 939         /* set BIAS tmds value: */
 940         reg_write(priv, REG_ANA_GENERAL, 0x09);
 941
 942         /*
 943          * Sync on rising HSYNC/VSYNC
 944          */
 945         reg = VIP_CNTRL_3_SYNC_HS;
 946
 947         /*
 948          * TDA19988 requires high-active sync at input stage,
 949          * so invert low-active sync provided by master encoder here
 950          */
 951         if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 952                 reg |= VIP_CNTRL_3_H_TGL;
 953         if (mode->flags & DRM_MODE_FLAG_NVSYNC)
 954                 reg |= VIP_CNTRL_3_V_TGL;
 955         reg_write(priv, REG_VIP_CNTRL_3, reg);
 956
 957         reg_write(priv, REG_VIDFORMAT, 0x00);
 958         reg_write16(priv, REG_REFPIX_MSB, ref_pix);
 959         reg_write16(priv, REG_REFLINE_MSB, ref_line);
 960         reg_write16(priv, REG_NPIX_MSB, n_pix);
 961         reg_write16(priv, REG_NLINE_MSB, n_line);
 962         reg_write16(priv, REG_VS_LINE_STRT_1_MSB, vs1_line_s);
 963         reg_write16(priv, REG_VS_PIX_STRT_1_MSB, vs1_pix_s);
 964         reg_write16(priv, REG_VS_LINE_END_1_MSB, vs1_line_e);
 965         reg_write16(priv, REG_VS_PIX_END_1_MSB, vs1_pix_e);
 966         reg_write16(priv, REG_VS_LINE_STRT_2_MSB, vs2_line_s);
 967         reg_write16(priv, REG_VS_PIX_STRT_2_MSB, vs2_pix_s);
 968         reg_write16(priv, REG_VS_LINE_END_2_MSB, vs2_line_e);
 969         reg_write16(priv, REG_VS_PIX_END_2_MSB, vs2_pix_e);
 970         reg_write16(priv, REG_HS_PIX_START_MSB, hs_pix_s);
 971         reg_write16(priv, REG_HS_PIX_STOP_MSB, hs_pix_e);
 972         reg_write16(priv, REG_VWIN_START_1_MSB, vwin1_line_s);
 973         reg_write16(priv, REG_VWIN_END_1_MSB, vwin1_line_e);
 974         reg_write16(priv, REG_VWIN_START_2_MSB, vwin2_line_s);
 975         reg_write16(priv, REG_VWIN_END_2_MSB, vwin2_line_e);
 976         reg_write16(priv, REG_DE_START_MSB, de_pix_s);
 977         reg_write16(priv, REG_DE_STOP_MSB, de_pix_e);
 978
 979         if (priv->rev == TDA19988) {
 980                 /* let incoming pixels fill the active space (if any) */
 981                 reg_write(priv, REG_ENABLE_SPACE, 0x00);
 982         }
 983
 984         /*
 985          * Always generate sync polarity relative to input sync and
 986          * revert input stage toggled sync at output stage
 987          */
 988         reg = TBG_CNTRL_1_DWIN_DIS | TBG_CNTRL_1_TGL_EN;
 989         if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 990                 reg |= TBG_CNTRL_1_H_TGL;
 991         if (mode->flags & DRM_MODE_FLAG_NVSYNC)
 992                 reg |= TBG_CNTRL_1_V_TGL;
 993         reg_write(priv, REG_TBG_CNTRL_1, reg);
 994
 995         /* must be last register set: */
 996         reg_write(priv, REG_TBG_CNTRL_0, 0);
 997
 998         /* Only setup the info frames if the sink is HDMI */
 999         if (priv->is_hdmi_sink) {
1000                 /* We need to turn HDMI HDCP stuff on to get audio through */
1001                 reg &= ~TBG_CNTRL_1_DWIN_DIS;
1002                 reg_write(priv, REG_TBG_CNTRL_1, reg);
1003                 reg_write(priv, REG_ENC_CNTRL, ENC_CNTRL_CTL_CODE(1));
1004                 reg_set(priv, REG_TX33, TX33_HDMI);
1005
1006                 tda998x_write_avi(priv, adjusted_mode);
1007
1008                 if (priv->params.audio_cfg)
1009                         tda998x_configure_audio(priv, adjusted_mode,
1010                                                 &priv->params);
1011         }
1012 }
1013
1014 static enum drm_connector_status
1015 tda998x_encoder_detect(struct drm_encoder *encoder,
1016                       struct drm_connector *connector)
1017 {
1018         struct tda998x_priv *priv = to_tda998x_priv(encoder);
1019         uint8_t val = cec_read(priv, REG_CEC_RXSHPDLEV);
1020
1021         return (val & CEC_RXSHPDLEV_HPD) ? connector_status_connected :
1022                         connector_status_disconnected;
1023 }
1024
1025 static int
1026 read_edid_block(struct drm_encoder *encoder, uint8_t *buf, int blk)
1027 {
1028         struct tda998x_priv *priv = to_tda998x_priv(encoder);
1029         uint8_t offset, segptr;
1030         int ret, i;
1031
1032         offset = (blk & 1) ? 128 : 0;
1033         segptr = blk / 2;
1034
1035         reg_write(priv, REG_DDC_ADDR, 0xa0);
1036         reg_write(priv, REG_DDC_OFFS, offset);
1037         reg_write(priv, REG_DDC_SEGM_ADDR, 0x60);
1038         reg_write(priv, REG_DDC_SEGM, segptr);
1039
1040         /* enable reading EDID: */
1041         priv->wq_edid_wait = 1;
1042         reg_write(priv, REG_EDID_CTRL, 0x1);
1043
1044         /* flag must be cleared by sw: */
1045         reg_write(priv, REG_EDID_CTRL, 0x0);
1046
1047         /* wait for block read to complete: */
1048         if (priv->hdmi->irq) {
1049                 i = wait_event_timeout(priv->wq_edid,
1050                                         !priv->wq_edid_wait,
1051                                         msecs_to_jiffies(100));
1052                 if (i < 0) {
1053                         dev_err(&priv->hdmi->dev, "read edid wait err %d\n", i);
1054                         return i;
1055                 }
1056         } else {
1057                 for (i = 100; i > 0; i--) {
1058                         msleep(1);
1059                         ret = reg_read(priv, REG_INT_FLAGS_2);
1060                         if (ret < 0)
1061                                 return ret;
1062                         if (ret & INT_FLAGS_2_EDID_BLK_RD)
1063                                 break;
1064                 }
1065         }
1066
1067         if (i == 0) {
1068                 dev_err(&priv->hdmi->dev, "read edid timeout\n");
1069                 return -ETIMEDOUT;
1070         }
1071
1072         ret = reg_read_range(priv, REG_EDID_DATA_0, buf, EDID_LENGTH);
1073         if (ret != EDID_LENGTH) {
1074                 dev_err(&priv->hdmi->dev, "failed to read edid block %d: %d\n",
1075                         blk, ret);
1076                 return ret;
1077         }
1078
1079         return 0;
1080 }
1081
1082 static uint8_t *
1083 do_get_edid(struct drm_encoder *encoder)
1084 {
1085         struct tda998x_priv *priv = to_tda998x_priv(encoder);
1086         int j, valid_extensions = 0;
1087         uint8_t *block, *new;
1088         bool print_bad_edid = drm_debug & DRM_UT_KMS;
1089
1090         if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
1091                 return NULL;
1092
1093         if (priv->rev == TDA19988)
1094                 reg_clear(priv, REG_TX4, TX4_PD_RAM);
1095
1096         /* base block fetch */
1097         if (read_edid_block(encoder, block, 0))
1098                 goto fail;
1099
1100         if (!drm_edid_block_valid(block, 0, print_bad_edid))
1101                 goto fail;
1102
1103         /* if there's no extensions, we're done */
1104         if (block[0x7e] == 0)
1105                 goto done;
1106
1107         new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
1108         if (!new)
1109                 goto fail;
1110         block = new;
1111
1112         for (j = 1; j <= block[0x7e]; j++) {
1113                 uint8_t *ext_block = block + (valid_extensions + 1) * EDID_LENGTH;
1114                 if (read_edid_block(encoder, ext_block, j))
1115                         goto fail;
1116
1117                 if (!drm_edid_block_valid(ext_block, j, print_bad_edid))
1118                         goto fail;
1119
1120                 valid_extensions++;
1121         }
1122
1123         if (valid_extensions != block[0x7e]) {
1124                 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
1125                 block[0x7e] = valid_extensions;
1126                 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
1127                 if (!new)
1128                         goto fail;
1129                 block = new;
1130         }
1131
1132 done:
1133         if (priv->rev == TDA19988)
1134                 reg_set(priv, REG_TX4, TX4_PD_RAM);
1135
1136         return block;
1137
1138 fail:
1139         if (priv->rev == TDA19988)
1140                 reg_set(priv, REG_TX4, TX4_PD_RAM);
1141         dev_warn(&priv->hdmi->dev, "failed to read EDID\n");
1142         kfree(block);
1143         return NULL;
1144 }
1145
1146 static int
1147 tda998x_encoder_get_modes(struct drm_encoder *encoder,
1148                          struct drm_connector *connector)
1149 {
1150         struct tda998x_priv *priv = to_tda998x_priv(encoder);
1151         struct edid *edid = (struct edid *)do_get_edid(encoder);
1152         int n = 0;
1153
1154         if (edid) {
1155                 drm_mode_connector_update_edid_property(connector, edid);
1156                 n = drm_add_edid_modes(connector, edid);
1157                 priv->is_hdmi_sink = drm_detect_hdmi_monitor(edid);
1158                 kfree(edid);
1159         }
1160
1161         return n;
1162 }
1163
1164 static int
1165 tda998x_encoder_create_resources(struct drm_encoder *encoder,
1166                                 struct drm_connector *connector)
1167 {
1168         struct tda998x_priv *priv = to_tda998x_priv(encoder);
1169
1170         if (priv->hdmi->irq)
1171                 connector->polled = DRM_CONNECTOR_POLL_HPD;
1172         else
1173                 connector->polled = DRM_CONNECTOR_POLL_CONNECT |
1174                         DRM_CONNECTOR_POLL_DISCONNECT;
1175         return 0;
1176 }
1177
1178 static int
1179 tda998x_encoder_set_property(struct drm_encoder *encoder,
1180                             struct drm_connector *connector,
1181                             struct drm_property *property,
1182                             uint64_t val)
1183 {
1184         DBG("");
1185         return 0;
1186 }
1187
1188 static void
1189 tda998x_encoder_destroy(struct drm_encoder *encoder)
1190 {
1191         struct tda998x_priv *priv = to_tda998x_priv(encoder);
1192
1193         /* disable all IRQs and free the IRQ handler */
1194         cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
1195         reg_clear(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
1196         if (priv->hdmi->irq)
1197                 free_irq(priv->hdmi->irq, priv);
1198
1199         if (priv->cec)
1200                 i2c_unregister_device(priv->cec);
1201         drm_i2c_encoder_destroy(encoder);
1202         kfree(priv);
1203 }
1204
1205 static struct drm_encoder_slave_funcs tda998x_encoder_funcs = {
1206         .set_config = tda998x_encoder_set_config,
1207         .destroy = tda998x_encoder_destroy,
1208         .dpms = tda998x_encoder_dpms,
1209         .save = tda998x_encoder_save,
1210         .restore = tda998x_encoder_restore,
1211         .mode_fixup = tda998x_encoder_mode_fixup,
1212         .mode_valid = tda998x_encoder_mode_valid,
1213         .mode_set = tda998x_encoder_mode_set,
1214         .detect = tda998x_encoder_detect,
1215         .get_modes = tda998x_encoder_get_modes,
1216         .create_resources = tda998x_encoder_create_resources,
1217         .set_property = tda998x_encoder_set_property,
1218 };
1219
1220 /* I2C driver functions */
1221
1222 static int
1223 tda998x_probe(struct i2c_client *client, const struct i2c_device_id *id)
1224 {
1225         return 0;
1226 }
1227
1228 static int
1229 tda998x_remove(struct i2c_client *client)
1230 {
1231         return 0;
1232 }
1233
1234 static int
1235 tda998x_encoder_init(struct i2c_client *client,
1236                     struct drm_device *dev,
1237                     struct drm_encoder_slave *encoder_slave)
1238 {
1239         struct tda998x_priv *priv;
1240         struct device_node *np = client->dev.of_node;
1241         u32 video;
1242         int rev_lo, rev_hi, ret;
1243
1244         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1245         if (!priv)
1246                 return -ENOMEM;
1247
1248         priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3);
1249         priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1);
1250         priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5);
1251
1252         priv->current_page = 0xff;
1253         priv->hdmi = client;
1254         priv->cec = i2c_new_dummy(client->adapter, 0x34);
1255         if (!priv->cec) {
1256                 kfree(priv);
1257                 return -ENODEV;
1258         }
1259
1260         priv->encoder = &encoder_slave->base;
1261         priv->dpms = DRM_MODE_DPMS_OFF;
1262
1263         encoder_slave->slave_priv = priv;
1264         encoder_slave->slave_funcs = &tda998x_encoder_funcs;
1265
1266         /* wake up the device: */
1267         cec_write(priv, REG_CEC_ENAMODS,
1268                         CEC_ENAMODS_EN_RXSENS | CEC_ENAMODS_EN_HDMI);
1269
1270         tda998x_reset(priv);
1271
1272         /* read version: */
1273         rev_lo = reg_read(priv, REG_VERSION_LSB);
1274         rev_hi = reg_read(priv, REG_VERSION_MSB);
1275         if (rev_lo < 0 || rev_hi < 0) {
1276                 ret = rev_lo < 0 ? rev_lo : rev_hi;
1277                 goto fail;
1278         }
1279
1280         priv->rev = rev_lo | rev_hi << 8;
1281
1282         /* mask off feature bits: */
1283         priv->rev &= ~0x30; /* not-hdcp and not-scalar bit */
1284
1285         switch (priv->rev) {
1286         case TDA9989N2:
1287                 dev_info(&client->dev, "found TDA9989 n2");
1288                 break;
1289         case TDA19989:
1290                 dev_info(&client->dev, "found TDA19989");
1291                 break;
1292         case TDA19989N2:
1293                 dev_info(&client->dev, "found TDA19989 n2");
1294                 break;
1295         case TDA19988:
1296                 dev_info(&client->dev, "found TDA19988");
1297                 break;
1298         default:
1299                 dev_err(&client->dev, "found unsupported device: %04x\n",
1300                         priv->rev);
1301                 goto fail;
1302         }
1303
1304         /* after reset, enable DDC: */
1305         reg_write(priv, REG_DDC_DISABLE, 0x00);
1306
1307         /* set clock on DDC channel: */
1308         reg_write(priv, REG_TX3, 39);
1309
1310         /* if necessary, disable multi-master: */
1311         if (priv->rev == TDA19989)
1312                 reg_set(priv, REG_I2C_MASTER, I2C_MASTER_DIS_MM);
1313
1314         cec_write(priv, REG_CEC_FRO_IM_CLK_CTRL,
1315                         CEC_FRO_IM_CLK_CTRL_GHOST_DIS | CEC_FRO_IM_CLK_CTRL_IMCLK_SEL);
1316
1317         /* initialize the optional IRQ */
1318         if (client->irq) {
1319                 int irqf_trigger;
1320
1321                 /* init read EDID waitqueue */
1322                 init_waitqueue_head(&priv->wq_edid);
1323
1324                 /* clear pending interrupts */
1325                 reg_read(priv, REG_INT_FLAGS_0);
1326                 reg_read(priv, REG_INT_FLAGS_1);
1327                 reg_read(priv, REG_INT_FLAGS_2);
1328
1329                 irqf_trigger =
1330                         irqd_get_trigger_type(irq_get_irq_data(client->irq));
1331                 ret = request_threaded_irq(client->irq, NULL,
1332                                            tda998x_irq_thread,
1333                                            irqf_trigger | IRQF_ONESHOT,
1334                                            "tda998x", priv);
1335                 if (ret) {
1336                         dev_err(&client->dev,
1337                                 "failed to request IRQ#%u: %d\n",
1338                                 client->irq, ret);
1339                         goto fail;
1340                 }
1341
1342                 /* enable HPD irq */
1343                 cec_write(priv, REG_CEC_RXSHPDINTENA, CEC_RXSHPDLEV_HPD);
1344         }
1345
1346         /* enable EDID read irq: */
1347         reg_set(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
1348
1349         if (!np)
1350                 return 0;               /* non-DT */
1351
1352         /* get the optional video properties */
1353         ret = of_property_read_u32(np, "video-ports", &video);
1354         if (ret == 0) {
1355                 priv->vip_cntrl_0 = video >> 16;
1356                 priv->vip_cntrl_1 = video >> 8;
1357                 priv->vip_cntrl_2 = video;
1358         }
1359
1360         return 0;
1361
1362 fail:
1363         /* if encoder_init fails, the encoder slave is never registered,
1364          * so cleanup here:
1365          */
1366         if (priv->cec)
1367                 i2c_unregister_device(priv->cec);
1368         kfree(priv);
1369         encoder_slave->slave_priv = NULL;
1370         encoder_slave->slave_funcs = NULL;
1371         return -ENXIO;
1372 }
1373
1374 #ifdef CONFIG_OF
1375 static const struct of_device_id tda998x_dt_ids[] = {
1376         { .compatible = "nxp,tda998x", },
1377         { }
1378 };
1379 MODULE_DEVICE_TABLE(of, tda998x_dt_ids);
1380 #endif
1381
1382 static struct i2c_device_id tda998x_ids[] = {
1383         { "tda998x", 0 },
1384         { }
1385 };
1386 MODULE_DEVICE_TABLE(i2c, tda998x_ids);
1387
1388 static struct drm_i2c_encoder_driver tda998x_driver = {
1389         .i2c_driver = {
1390                 .probe = tda998x_probe,
1391                 .remove = tda998x_remove,
1392                 .driver = {
1393                         .name = "tda998x",
1394                         .of_match_table = of_match_ptr(tda998x_dt_ids),
1395                 },
1396                 .id_table = tda998x_ids,
1397         },
1398         .encoder_init = tda998x_encoder_init,
1399 };
1400
1401 /* Module initialization */
1402
1403 static int __init
1404 tda998x_init(void)
1405 {
1406         DBG("");
1407         return drm_i2c_encoder_register(THIS_MODULE, &tda998x_driver);
1408 }
1409
1410 static void __exit
1411 tda998x_exit(void)
1412 {
1413         DBG("");
1414         drm_i2c_encoder_unregister(&tda998x_driver);
1415 }
1416
1417 MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
1418 MODULE_DESCRIPTION("NXP Semiconductors TDA998X HDMI Encoder");
1419 MODULE_LICENSE("GPL");
1420
1421 module_init(tda998x_init);
1422 module_exit(tda998x_exit);