kernel/drivers/gpu/drm/sti/sti_hqvdp.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Authors: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
   4  * License terms:  GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/firmware.h>
  10 #include <linux/module.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/reset.h>
  13
  14 #include <drm/drmP.h>
  15 #include <drm/drm_fb_cma_helper.h>
  16 #include <drm/drm_gem_cma_helper.h>
  17
  18 #include "sti_compositor.h"
  19 #include "sti_hqvdp_lut.h"
  20 #include "sti_plane.h"
  21 #include "sti_vtg.h"
  22
  23 /* Firmware name */
  24 #define HQVDP_FMW_NAME          "hqvdp-stih407.bin"
  25
  26 /* Regs address */
  27 #define HQVDP_DMEM              0x00000000               /* 0x00000000 */
  28 #define HQVDP_PMEM              0x00040000               /* 0x00040000 */
  29 #define HQVDP_RD_PLUG           0x000E0000               /* 0x000E0000 */
  30 #define HQVDP_RD_PLUG_CONTROL   (HQVDP_RD_PLUG + 0x1000) /* 0x000E1000 */
  31 #define HQVDP_RD_PLUG_PAGE_SIZE (HQVDP_RD_PLUG + 0x1004) /* 0x000E1004 */
  32 #define HQVDP_RD_PLUG_MIN_OPC   (HQVDP_RD_PLUG + 0x1008) /* 0x000E1008 */
  33 #define HQVDP_RD_PLUG_MAX_OPC   (HQVDP_RD_PLUG + 0x100C) /* 0x000E100C */
  34 #define HQVDP_RD_PLUG_MAX_CHK   (HQVDP_RD_PLUG + 0x1010) /* 0x000E1010 */
  35 #define HQVDP_RD_PLUG_MAX_MSG   (HQVDP_RD_PLUG + 0x1014) /* 0x000E1014 */
  36 #define HQVDP_RD_PLUG_MIN_SPACE (HQVDP_RD_PLUG + 0x1018) /* 0x000E1018 */
  37 #define HQVDP_WR_PLUG           0x000E2000               /* 0x000E2000 */
  38 #define HQVDP_WR_PLUG_CONTROL   (HQVDP_WR_PLUG + 0x1000) /* 0x000E3000 */
  39 #define HQVDP_WR_PLUG_PAGE_SIZE (HQVDP_WR_PLUG + 0x1004) /* 0x000E3004 */
  40 #define HQVDP_WR_PLUG_MIN_OPC   (HQVDP_WR_PLUG + 0x1008) /* 0x000E3008 */
  41 #define HQVDP_WR_PLUG_MAX_OPC   (HQVDP_WR_PLUG + 0x100C) /* 0x000E300C */
  42 #define HQVDP_WR_PLUG_MAX_CHK   (HQVDP_WR_PLUG + 0x1010) /* 0x000E3010 */
  43 #define HQVDP_WR_PLUG_MAX_MSG   (HQVDP_WR_PLUG + 0x1014) /* 0x000E3014 */
  44 #define HQVDP_WR_PLUG_MIN_SPACE (HQVDP_WR_PLUG + 0x1018) /* 0x000E3018 */
  45 #define HQVDP_MBX               0x000E4000               /* 0x000E4000 */
  46 #define HQVDP_MBX_IRQ_TO_XP70   (HQVDP_MBX + 0x0000)     /* 0x000E4000 */
  47 #define HQVDP_MBX_INFO_HOST     (HQVDP_MBX + 0x0004)     /* 0x000E4004 */
  48 #define HQVDP_MBX_IRQ_TO_HOST   (HQVDP_MBX + 0x0008)     /* 0x000E4008 */
  49 #define HQVDP_MBX_INFO_XP70     (HQVDP_MBX + 0x000C)     /* 0x000E400C */
  50 #define HQVDP_MBX_SW_RESET_CTRL (HQVDP_MBX + 0x0010)     /* 0x000E4010 */
  51 #define HQVDP_MBX_STARTUP_CTRL1 (HQVDP_MBX + 0x0014)     /* 0x000E4014 */
  52 #define HQVDP_MBX_STARTUP_CTRL2 (HQVDP_MBX + 0x0018)     /* 0x000E4018 */
  53 #define HQVDP_MBX_GP_STATUS     (HQVDP_MBX + 0x001C)     /* 0x000E401C */
  54 #define HQVDP_MBX_NEXT_CMD      (HQVDP_MBX + 0x0020)     /* 0x000E4020 */
  55 #define HQVDP_MBX_CURRENT_CMD   (HQVDP_MBX + 0x0024)     /* 0x000E4024 */
  56 #define HQVDP_MBX_SOFT_VSYNC    (HQVDP_MBX + 0x0028)     /* 0x000E4028 */
  57
  58 /* Plugs config */
  59 #define PLUG_CONTROL_ENABLE     0x00000001
  60 #define PLUG_PAGE_SIZE_256      0x00000002
  61 #define PLUG_MIN_OPC_8          0x00000003
  62 #define PLUG_MAX_OPC_64         0x00000006
  63 #define PLUG_MAX_CHK_2X         0x00000001
  64 #define PLUG_MAX_MSG_1X         0x00000000
  65 #define PLUG_MIN_SPACE_1        0x00000000
  66
  67 /* SW reset CTRL */
  68 #define SW_RESET_CTRL_FULL      BIT(0)
  69 #define SW_RESET_CTRL_CORE      BIT(1)
  70
  71 /* Startup ctrl 1 */
  72 #define STARTUP_CTRL1_RST_DONE  BIT(0)
  73 #define STARTUP_CTRL1_AUTH_IDLE BIT(2)
  74
  75 /* Startup ctrl 2 */
  76 #define STARTUP_CTRL2_FETCH_EN  BIT(1)
  77
  78 /* Info xP70 */
  79 #define INFO_XP70_FW_READY      BIT(15)
  80 #define INFO_XP70_FW_PROCESSING BIT(14)
  81 #define INFO_XP70_FW_INITQUEUES BIT(13)
  82
  83 /* SOFT_VSYNC */
  84 #define SOFT_VSYNC_HW           0x00000000
  85 #define SOFT_VSYNC_SW_CMD       0x00000001
  86 #define SOFT_VSYNC_SW_CTRL_IRQ  0x00000003
  87
  88 /* Reset & boot poll config */
  89 #define POLL_MAX_ATTEMPT        50
  90 #define POLL_DELAY_MS           20
  91
  92 #define SCALE_FACTOR            8192
  93 #define SCALE_MAX_FOR_LEG_LUT_F 4096
  94 #define SCALE_MAX_FOR_LEG_LUT_E 4915
  95 #define SCALE_MAX_FOR_LEG_LUT_D 6654
  96 #define SCALE_MAX_FOR_LEG_LUT_C 8192
  97
  98 enum sti_hvsrc_orient {
  99         HVSRC_HORI,
 100         HVSRC_VERT
 101 };
 102
 103 /* Command structures */
 104 struct sti_hqvdp_top {
 105         u32 config;
 106         u32 mem_format;
 107         u32 current_luma;
 108         u32 current_enh_luma;
 109         u32 current_right_luma;
 110         u32 current_enh_right_luma;
 111         u32 current_chroma;
 112         u32 current_enh_chroma;
 113         u32 current_right_chroma;
 114         u32 current_enh_right_chroma;
 115         u32 output_luma;
 116         u32 output_chroma;
 117         u32 luma_src_pitch;
 118         u32 luma_enh_src_pitch;
 119         u32 luma_right_src_pitch;
 120         u32 luma_enh_right_src_pitch;
 121         u32 chroma_src_pitch;
 122         u32 chroma_enh_src_pitch;
 123         u32 chroma_right_src_pitch;
 124         u32 chroma_enh_right_src_pitch;
 125         u32 luma_processed_pitch;
 126         u32 chroma_processed_pitch;
 127         u32 input_frame_size;
 128         u32 input_viewport_ori;
 129         u32 input_viewport_ori_right;
 130         u32 input_viewport_size;
 131         u32 left_view_border_width;
 132         u32 right_view_border_width;
 133         u32 left_view_3d_offset_width;
 134         u32 right_view_3d_offset_width;
 135         u32 side_stripe_color;
 136         u32 crc_reset_ctrl;
 137 };
 138
 139 /* Configs for interlaced : no IT, no pass thru, 3 fields */
 140 #define TOP_CONFIG_INTER_BTM            0x00000000
 141 #define TOP_CONFIG_INTER_TOP            0x00000002
 142
 143 /* Config for progressive : no IT, no pass thru, 3 fields */
 144 #define TOP_CONFIG_PROGRESSIVE          0x00000001
 145
 146 /* Default MemFormat: in=420_raster_dual out=444_raster;opaque Mem2Tv mode */
 147 #define TOP_MEM_FORMAT_DFLT             0x00018060
 148
 149 /* Min/Max size */
 150 #define MAX_WIDTH                       0x1FFF
 151 #define MAX_HEIGHT                      0x0FFF
 152 #define MIN_WIDTH                       0x0030
 153 #define MIN_HEIGHT                      0x0010
 154
 155 struct sti_hqvdp_vc1re {
 156         u32 ctrl_prv_csdi;
 157         u32 ctrl_cur_csdi;
 158         u32 ctrl_nxt_csdi;
 159         u32 ctrl_cur_fmd;
 160         u32 ctrl_nxt_fmd;
 161 };
 162
 163 struct sti_hqvdp_fmd {
 164         u32 config;
 165         u32 viewport_ori;
 166         u32 viewport_size;
 167         u32 next_next_luma;
 168         u32 next_next_right_luma;
 169         u32 next_next_next_luma;
 170         u32 next_next_next_right_luma;
 171         u32 threshold_scd;
 172         u32 threshold_rfd;
 173         u32 threshold_move;
 174         u32 threshold_cfd;
 175 };
 176
 177 struct sti_hqvdp_csdi {
 178         u32 config;
 179         u32 config2;
 180         u32 dcdi_config;
 181         u32 prev_luma;
 182         u32 prev_enh_luma;
 183         u32 prev_right_luma;
 184         u32 prev_enh_right_luma;
 185         u32 next_luma;
 186         u32 next_enh_luma;
 187         u32 next_right_luma;
 188         u32 next_enh_right_luma;
 189         u32 prev_chroma;
 190         u32 prev_enh_chroma;
 191         u32 prev_right_chroma;
 192         u32 prev_enh_right_chroma;
 193         u32 next_chroma;
 194         u32 next_enh_chroma;
 195         u32 next_right_chroma;
 196         u32 next_enh_right_chroma;
 197         u32 prev_motion;
 198         u32 prev_right_motion;
 199         u32 cur_motion;
 200         u32 cur_right_motion;
 201         u32 next_motion;
 202         u32 next_right_motion;
 203 };
 204
 205 /* Config for progressive: by pass */
 206 #define CSDI_CONFIG_PROG                0x00000000
 207 /* Config for directional deinterlacing without motion */
 208 #define CSDI_CONFIG_INTER_DIR           0x00000016
 209 /* Additional configs for fader, blender, motion,... deinterlace algorithms */
 210 #define CSDI_CONFIG2_DFLT               0x000001B3
 211 #define CSDI_DCDI_CONFIG_DFLT           0x00203803
 212
 213 struct sti_hqvdp_hvsrc {
 214         u32 hor_panoramic_ctrl;
 215         u32 output_picture_size;
 216         u32 init_horizontal;
 217         u32 init_vertical;
 218         u32 param_ctrl;
 219         u32 yh_coef[NB_COEF];
 220         u32 ch_coef[NB_COEF];
 221         u32 yv_coef[NB_COEF];
 222         u32 cv_coef[NB_COEF];
 223         u32 hori_shift;
 224         u32 vert_shift;
 225 };
 226
 227 /* Default ParamCtrl: all controls enabled */
 228 #define HVSRC_PARAM_CTRL_DFLT           0xFFFFFFFF
 229
 230 struct sti_hqvdp_iqi {
 231         u32 config;
 232         u32 demo_wind_size;
 233         u32 pk_config;
 234         u32 coeff0_coeff1;
 235         u32 coeff2_coeff3;
 236         u32 coeff4;
 237         u32 pk_lut;
 238         u32 pk_gain;
 239         u32 pk_coring_level;
 240         u32 cti_config;
 241         u32 le_config;
 242         u32 le_lut[64];
 243         u32 con_bri;
 244         u32 sat_gain;
 245         u32 pxf_conf;
 246         u32 default_color;
 247 };
 248
 249 /* Default Config : IQI bypassed */
 250 #define IQI_CONFIG_DFLT                 0x00000001
 251 /* Default Contrast & Brightness gain = 256 */
 252 #define IQI_CON_BRI_DFLT                0x00000100
 253 /* Default Saturation gain = 256 */
 254 #define IQI_SAT_GAIN_DFLT               0x00000100
 255 /* Default PxfConf : P2I bypassed */
 256 #define IQI_PXF_CONF_DFLT               0x00000001
 257
 258 struct sti_hqvdp_top_status {
 259         u32 processing_time;
 260         u32 input_y_crc;
 261         u32 input_uv_crc;
 262 };
 263
 264 struct sti_hqvdp_fmd_status {
 265         u32 fmd_repeat_move_status;
 266         u32 fmd_scene_count_status;
 267         u32 cfd_sum;
 268         u32 field_sum;
 269         u32 next_y_fmd_crc;
 270         u32 next_next_y_fmd_crc;
 271         u32 next_next_next_y_fmd_crc;
 272 };
 273
 274 struct sti_hqvdp_csdi_status {
 275         u32 prev_y_csdi_crc;
 276         u32 cur_y_csdi_crc;
 277         u32 next_y_csdi_crc;
 278         u32 prev_uv_csdi_crc;
 279         u32 cur_uv_csdi_crc;
 280         u32 next_uv_csdi_crc;
 281         u32 y_csdi_crc;
 282         u32 uv_csdi_crc;
 283         u32 uv_cup_crc;
 284         u32 mot_csdi_crc;
 285         u32 mot_cur_csdi_crc;
 286         u32 mot_prev_csdi_crc;
 287 };
 288
 289 struct sti_hqvdp_hvsrc_status {
 290         u32 y_hvsrc_crc;
 291         u32 u_hvsrc_crc;
 292         u32 v_hvsrc_crc;
 293 };
 294
 295 struct sti_hqvdp_iqi_status {
 296         u32 pxf_it_status;
 297         u32 y_iqi_crc;
 298         u32 u_iqi_crc;
 299         u32 v_iqi_crc;
 300 };
 301
 302 /* Main commands. We use 2 commands one being processed by the firmware, one
 303  * ready to be fetched upon next Vsync*/
 304 #define NB_VDP_CMD      2
 305
 306 struct sti_hqvdp_cmd {
 307         struct sti_hqvdp_top top;
 308         struct sti_hqvdp_vc1re vc1re;
 309         struct sti_hqvdp_fmd fmd;
 310         struct sti_hqvdp_csdi csdi;
 311         struct sti_hqvdp_hvsrc hvsrc;
 312         struct sti_hqvdp_iqi iqi;
 313         struct sti_hqvdp_top_status top_status;
 314         struct sti_hqvdp_fmd_status fmd_status;
 315         struct sti_hqvdp_csdi_status csdi_status;
 316         struct sti_hqvdp_hvsrc_status hvsrc_status;
 317         struct sti_hqvdp_iqi_status iqi_status;
 318 };
 319
 320 /*
 321  * STI HQVDP structure
 322  *
 323  * @dev:               driver device
 324  * @drm_dev:           the drm device
 325  * @regs:              registers
 326  * @plane:             plane structure for hqvdp it self
 327  * @clk:               IP clock
 328  * @clk_pix_main:      pix main clock
 329  * @reset:             reset control
 330  * @vtg_nb:            notifier to handle VTG Vsync
 331  * @btm_field_pending: is there any bottom field (interlaced frame) to display
 332  * @curr_field_count:  number of field updates
 333  * @last_field_count:  number of field updates since last fps measure
 334  * @hqvdp_cmd:         buffer of commands
 335  * @hqvdp_cmd_paddr:   physical address of hqvdp_cmd
 336  * @vtg:               vtg for main data path
 337  * @xp70_initialized:  true if xp70 is already initialized
 338  */
 339 struct sti_hqvdp {
 340         struct device *dev;
 341         struct drm_device *drm_dev;
 342         void __iomem *regs;
 343         struct sti_plane plane;
 344         struct clk *clk;
 345         struct clk *clk_pix_main;
 346         struct reset_control *reset;
 347         struct notifier_block vtg_nb;
 348         bool btm_field_pending;
 349         unsigned int curr_field_count;
 350         unsigned int last_field_count;
 351         void *hqvdp_cmd;
 352         dma_addr_t hqvdp_cmd_paddr;
 353         struct sti_vtg *vtg;
 354         bool xp70_initialized;
 355 };
 356
 357 #define to_sti_hqvdp(x) container_of(x, struct sti_hqvdp, plane)
 358
 359 static const uint32_t hqvdp_supported_formats[] = {
 360         DRM_FORMAT_NV12,
 361 };
 362
 363 /**
 364  * sti_hqvdp_get_free_cmd
 365  * @hqvdp: hqvdp structure
 366  *
 367  * Look for a hqvdp_cmd that is not being used (or about to be used) by the FW.
 368  *
 369  * RETURNS:
 370  * the offset of the command to be used.
 371  * -1 in error cases
 372  */
 373 static int sti_hqvdp_get_free_cmd(struct sti_hqvdp *hqvdp)
 374 {
 375         int curr_cmd, next_cmd;
 376         dma_addr_t cmd = hqvdp->hqvdp_cmd_paddr;
 377         int i;
 378
 379         curr_cmd = readl(hqvdp->regs + HQVDP_MBX_CURRENT_CMD);
 380         next_cmd = readl(hqvdp->regs + HQVDP_MBX_NEXT_CMD);
 381
 382         for (i = 0; i < NB_VDP_CMD; i++) {
 383                 if ((cmd != curr_cmd) && (cmd != next_cmd))
 384                         return i * sizeof(struct sti_hqvdp_cmd);
 385                 cmd += sizeof(struct sti_hqvdp_cmd);
 386         }
 387
 388         return -1;
 389 }
 390
 391 /**
 392  * sti_hqvdp_get_curr_cmd
 393  * @hqvdp: hqvdp structure
 394  *
 395  * Look for the hqvdp_cmd that is being used by the FW.
 396  *
 397  * RETURNS:
 398  *  the offset of the command to be used.
 399  * -1 in error cases
 400  */
 401 static int sti_hqvdp_get_curr_cmd(struct sti_hqvdp *hqvdp)
 402 {
 403         int curr_cmd;
 404         dma_addr_t cmd = hqvdp->hqvdp_cmd_paddr;
 405         unsigned int i;
 406
 407         curr_cmd = readl(hqvdp->regs + HQVDP_MBX_CURRENT_CMD);
 408
 409         for (i = 0; i < NB_VDP_CMD; i++) {
 410                 if (cmd == curr_cmd)
 411                         return i * sizeof(struct sti_hqvdp_cmd);
 412
 413                 cmd += sizeof(struct sti_hqvdp_cmd);
 414         }
 415
 416         return -1;
 417 }
 418
 419 /**
 420  * sti_hqvdp_update_hvsrc
 421  * @orient: horizontal or vertical
 422  * @scale:  scaling/zoom factor
 423  * @hvsrc:  the structure containing the LUT coef
 424  *
 425  * Update the Y and C Lut coef, as well as the shift param
 426  *
 427  * RETURNS:
 428  * None.
 429  */
 430 static void sti_hqvdp_update_hvsrc(enum sti_hvsrc_orient orient, int scale,
 431                 struct sti_hqvdp_hvsrc *hvsrc)
 432 {
 433         const int *coef_c, *coef_y;
 434         int shift_c, shift_y;
 435
 436         /* Get the appropriate coef tables */
 437         if (scale < SCALE_MAX_FOR_LEG_LUT_F) {
 438                 coef_y = coef_lut_f_y_legacy;
 439                 coef_c = coef_lut_f_c_legacy;
 440                 shift_y = SHIFT_LUT_F_Y_LEGACY;
 441                 shift_c = SHIFT_LUT_F_C_LEGACY;
 442         } else if (scale < SCALE_MAX_FOR_LEG_LUT_E) {
 443                 coef_y = coef_lut_e_y_legacy;
 444                 coef_c = coef_lut_e_c_legacy;
 445                 shift_y = SHIFT_LUT_E_Y_LEGACY;
 446                 shift_c = SHIFT_LUT_E_C_LEGACY;
 447         } else if (scale < SCALE_MAX_FOR_LEG_LUT_D) {
 448                 coef_y = coef_lut_d_y_legacy;
 449                 coef_c = coef_lut_d_c_legacy;
 450                 shift_y = SHIFT_LUT_D_Y_LEGACY;
 451                 shift_c = SHIFT_LUT_D_C_LEGACY;
 452         } else if (scale < SCALE_MAX_FOR_LEG_LUT_C) {
 453                 coef_y = coef_lut_c_y_legacy;
 454                 coef_c = coef_lut_c_c_legacy;
 455                 shift_y = SHIFT_LUT_C_Y_LEGACY;
 456                 shift_c = SHIFT_LUT_C_C_LEGACY;
 457         } else if (scale == SCALE_MAX_FOR_LEG_LUT_C) {
 458                 coef_y = coef_c = coef_lut_b;
 459                 shift_y = shift_c = SHIFT_LUT_B;
 460         } else {
 461                 coef_y = coef_c = coef_lut_a_legacy;
 462                 shift_y = shift_c = SHIFT_LUT_A_LEGACY;
 463         }
 464
 465         if (orient == HVSRC_HORI) {
 466                 hvsrc->hori_shift = (shift_c << 16) | shift_y;
 467                 memcpy(hvsrc->yh_coef, coef_y, sizeof(hvsrc->yh_coef));
 468                 memcpy(hvsrc->ch_coef, coef_c, sizeof(hvsrc->ch_coef));
 469         } else {
 470                 hvsrc->vert_shift = (shift_c << 16) | shift_y;
 471                 memcpy(hvsrc->yv_coef, coef_y, sizeof(hvsrc->yv_coef));
 472                 memcpy(hvsrc->cv_coef, coef_c, sizeof(hvsrc->cv_coef));
 473         }
 474 }
 475
 476 /**
 477  * sti_hqvdp_check_hw_scaling
 478  * @hqvdp: hqvdp pointer
 479  * @mode: display mode with timing constraints
 480  * @src_w: source width
 481  * @src_h: source height
 482  * @dst_w: destination width
 483  * @dst_h: destination height
 484  *
 485  * Check if the HW is able to perform the scaling request
 486  * The firmware scaling limitation is "CEIL(1/Zy) <= FLOOR(LFW)" where:
 487  *   Zy = OutputHeight / InputHeight
 488  *   LFW = (Tx * IPClock) / (MaxNbCycles * Cp)
 489  *     Tx : Total video mode horizontal resolution
 490  *     IPClock : HQVDP IP clock (Mhz)
 491  *     MaxNbCycles: max(InputWidth, OutputWidth)
 492  *     Cp: Video mode pixel clock (Mhz)
 493  *
 494  * RETURNS:
 495  * True if the HW can scale.
 496  */
 497 static bool sti_hqvdp_check_hw_scaling(struct sti_hqvdp *hqvdp,
 498                                        struct drm_display_mode *mode,
 499                                        int src_w, int src_h,
 500                                        int dst_w, int dst_h)
 501 {
 502         unsigned long lfw;
 503         unsigned int inv_zy;
 504
 505         lfw = mode->htotal * (clk_get_rate(hqvdp->clk) / 1000000);
 506         lfw /= max(src_w, dst_w) * mode->clock / 1000;
 507
 508         inv_zy = DIV_ROUND_UP(src_h, dst_h);
 509
 510         return (inv_zy <= lfw) ? true : false;
 511 }
 512
 513 /**
 514  * sti_hqvdp_disable
 515  * @hqvdp: hqvdp pointer
 516  *
 517  * Disables the HQVDP plane
 518  */
 519 static void sti_hqvdp_disable(struct sti_hqvdp *hqvdp)
 520 {
 521         int i;
 522
 523         DRM_DEBUG_DRIVER("%s\n", sti_plane_to_str(&hqvdp->plane));
 524
 525         /* Unregister VTG Vsync callback */
 526         if (sti_vtg_unregister_client(hqvdp->vtg, &hqvdp->vtg_nb))
 527                 DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
 528
 529         /* Set next cmd to NULL */
 530         writel(0, hqvdp->regs + HQVDP_MBX_NEXT_CMD);
 531
 532         for (i = 0; i < POLL_MAX_ATTEMPT; i++) {
 533                 if (readl(hqvdp->regs + HQVDP_MBX_INFO_XP70)
 534                                 & INFO_XP70_FW_READY)
 535                         break;
 536                 msleep(POLL_DELAY_MS);
 537         }
 538
 539         /* VTG can stop now */
 540         clk_disable_unprepare(hqvdp->clk_pix_main);
 541
 542         if (i == POLL_MAX_ATTEMPT)
 543                 DRM_ERROR("XP70 could not revert to idle\n");
 544
 545         hqvdp->plane.status = STI_PLANE_DISABLED;
 546 }
 547
 548 /**
 549  * sti_vdp_vtg_cb
 550  * @nb: notifier block
 551  * @evt: event message
 552  * @data: private data
 553  *
 554  * Handle VTG Vsync event, display pending bottom field
 555  *
 556  * RETURNS:
 557  * 0 on success.
 558  */
 559 int sti_hqvdp_vtg_cb(struct notifier_block *nb, unsigned long evt, void *data)
 560 {
 561         struct sti_hqvdp *hqvdp = container_of(nb, struct sti_hqvdp, vtg_nb);
 562         int btm_cmd_offset, top_cmd_offest;
 563         struct sti_hqvdp_cmd *btm_cmd, *top_cmd;
 564
 565         if ((evt != VTG_TOP_FIELD_EVENT) && (evt != VTG_BOTTOM_FIELD_EVENT)) {
 566                 DRM_DEBUG_DRIVER("Unknown event\n");
 567                 return 0;
 568         }
 569
 570         if (hqvdp->plane.status == STI_PLANE_FLUSHING) {
 571                 /* disable need to be synchronize on vsync event */
 572                 DRM_DEBUG_DRIVER("Vsync event received => disable %s\n",
 573                                  sti_plane_to_str(&hqvdp->plane));
 574
 575                 sti_hqvdp_disable(hqvdp);
 576         }
 577
 578         if (hqvdp->btm_field_pending) {
 579                 /* Create the btm field command from the current one */
 580                 btm_cmd_offset = sti_hqvdp_get_free_cmd(hqvdp);
 581                 top_cmd_offest = sti_hqvdp_get_curr_cmd(hqvdp);
 582                 if ((btm_cmd_offset == -1) || (top_cmd_offest == -1)) {
 583                         DRM_ERROR("Cannot get cmds, skip btm field\n");
 584                         return -EBUSY;
 585                 }
 586
 587                 btm_cmd = hqvdp->hqvdp_cmd + btm_cmd_offset;
 588                 top_cmd = hqvdp->hqvdp_cmd + top_cmd_offest;
 589
 590                 memcpy(btm_cmd, top_cmd, sizeof(*btm_cmd));
 591
 592                 btm_cmd->top.config = TOP_CONFIG_INTER_BTM;
 593                 btm_cmd->top.current_luma +=
 594                                 btm_cmd->top.luma_src_pitch / 2;
 595                 btm_cmd->top.current_chroma +=
 596                                 btm_cmd->top.chroma_src_pitch / 2;
 597
 598                 /* Post the command to mailbox */
 599                 writel(hqvdp->hqvdp_cmd_paddr + btm_cmd_offset,
 600                                 hqvdp->regs + HQVDP_MBX_NEXT_CMD);
 601
 602                 hqvdp->curr_field_count++;
 603                 hqvdp->btm_field_pending = false;
 604
 605                 dev_dbg(hqvdp->dev, "%s Posted command:0x%x\n",
 606                                 __func__, hqvdp->hqvdp_cmd_paddr);
 607         }
 608
 609         return 0;
 610 }
 611
 612 static void sti_hqvdp_init(struct sti_hqvdp *hqvdp)
 613 {
 614         int size;
 615
 616         hqvdp->vtg_nb.notifier_call = sti_hqvdp_vtg_cb;
 617
 618         /* Allocate memory for the VDP commands */
 619         size = NB_VDP_CMD * sizeof(struct sti_hqvdp_cmd);
 620         hqvdp->hqvdp_cmd = dma_alloc_writecombine(hqvdp->dev, size,
 621                                          &hqvdp->hqvdp_cmd_paddr,
 622                                          GFP_KERNEL | GFP_DMA);
 623         if (!hqvdp->hqvdp_cmd) {
 624                 DRM_ERROR("Failed to allocate memory for VDP cmd\n");
 625                 return;
 626         }
 627
 628         memset(hqvdp->hqvdp_cmd, 0, size);
 629 }
 630
 631 static void sti_hqvdp_init_plugs(struct sti_hqvdp *hqvdp)
 632 {
 633         /* Configure Plugs (same for RD & WR) */
 634         writel(PLUG_PAGE_SIZE_256, hqvdp->regs + HQVDP_RD_PLUG_PAGE_SIZE);
 635         writel(PLUG_MIN_OPC_8, hqvdp->regs + HQVDP_RD_PLUG_MIN_OPC);
 636         writel(PLUG_MAX_OPC_64, hqvdp->regs + HQVDP_RD_PLUG_MAX_OPC);
 637         writel(PLUG_MAX_CHK_2X, hqvdp->regs + HQVDP_RD_PLUG_MAX_CHK);
 638         writel(PLUG_MAX_MSG_1X, hqvdp->regs + HQVDP_RD_PLUG_MAX_MSG);
 639         writel(PLUG_MIN_SPACE_1, hqvdp->regs + HQVDP_RD_PLUG_MIN_SPACE);
 640         writel(PLUG_CONTROL_ENABLE, hqvdp->regs + HQVDP_RD_PLUG_CONTROL);
 641
 642         writel(PLUG_PAGE_SIZE_256, hqvdp->regs + HQVDP_WR_PLUG_PAGE_SIZE);
 643         writel(PLUG_MIN_OPC_8, hqvdp->regs + HQVDP_WR_PLUG_MIN_OPC);
 644         writel(PLUG_MAX_OPC_64, hqvdp->regs + HQVDP_WR_PLUG_MAX_OPC);
 645         writel(PLUG_MAX_CHK_2X, hqvdp->regs + HQVDP_WR_PLUG_MAX_CHK);
 646         writel(PLUG_MAX_MSG_1X, hqvdp->regs + HQVDP_WR_PLUG_MAX_MSG);
 647         writel(PLUG_MIN_SPACE_1, hqvdp->regs + HQVDP_WR_PLUG_MIN_SPACE);
 648         writel(PLUG_CONTROL_ENABLE, hqvdp->regs + HQVDP_WR_PLUG_CONTROL);
 649 }
 650
 651 /**
 652  * sti_hqvdp_start_xp70
 653  * @hqvdp: hqvdp pointer
 654  *
 655  * Run the xP70 initialization sequence
 656  */
 657 static void sti_hqvdp_start_xp70(struct sti_hqvdp *hqvdp)
 658 {
 659         const struct firmware *firmware;
 660         u32 *fw_rd_plug, *fw_wr_plug, *fw_pmem, *fw_dmem;
 661         u8 *data;
 662         int i;
 663         struct fw_header {
 664                 int rd_size;
 665                 int wr_size;
 666                 int pmem_size;
 667                 int dmem_size;
 668         } *header;
 669
 670         DRM_DEBUG_DRIVER("\n");
 671
 672         if (hqvdp->xp70_initialized) {
 673                 DRM_INFO("HQVDP XP70 already initialized\n");
 674                 return;
 675         }
 676
 677         /* Request firmware */
 678         if (request_firmware(&firmware, HQVDP_FMW_NAME, hqvdp->dev)) {
 679                 DRM_ERROR("Can't get HQVDP firmware\n");
 680                 return;
 681         }
 682
 683         /* Check firmware parts */
 684         if (!firmware) {
 685                 DRM_ERROR("Firmware not available\n");
 686                 return;
 687         }
 688
 689         header = (struct fw_header *)firmware->data;
 690         if (firmware->size < sizeof(*header)) {
 691                 DRM_ERROR("Invalid firmware size (%d)\n", firmware->size);
 692                 goto out;
 693         }
 694         if ((sizeof(*header) + header->rd_size + header->wr_size +
 695                 header->pmem_size + header->dmem_size) != firmware->size) {
 696                 DRM_ERROR("Invalid fmw structure (%d+%d+%d+%d+%d != %d)\n",
 697                           sizeof(*header), header->rd_size, header->wr_size,
 698                           header->pmem_size, header->dmem_size,
 699                           firmware->size);
 700                 goto out;
 701         }
 702
 703         data = (u8 *)firmware->data;
 704         data += sizeof(*header);
 705         fw_rd_plug = (void *)data;
 706         data += header->rd_size;
 707         fw_wr_plug = (void *)data;
 708         data += header->wr_size;
 709         fw_pmem = (void *)data;
 710         data += header->pmem_size;
 711         fw_dmem = (void *)data;
 712
 713         /* Enable clock */
 714         if (clk_prepare_enable(hqvdp->clk))
 715                 DRM_ERROR("Failed to prepare/enable HQVDP clk\n");
 716
 717         /* Reset */
 718         writel(SW_RESET_CTRL_FULL, hqvdp->regs + HQVDP_MBX_SW_RESET_CTRL);
 719
 720         for (i = 0; i < POLL_MAX_ATTEMPT; i++) {
 721                 if (readl(hqvdp->regs + HQVDP_MBX_STARTUP_CTRL1)
 722                                 & STARTUP_CTRL1_RST_DONE)
 723                         break;
 724                 msleep(POLL_DELAY_MS);
 725         }
 726         if (i == POLL_MAX_ATTEMPT) {
 727                 DRM_ERROR("Could not reset\n");
 728                 goto out;
 729         }
 730
 731         /* Init Read & Write plugs */
 732         for (i = 0; i < header->rd_size / 4; i++)
 733                 writel(fw_rd_plug[i], hqvdp->regs + HQVDP_RD_PLUG + i * 4);
 734         for (i = 0; i < header->wr_size / 4; i++)
 735                 writel(fw_wr_plug[i], hqvdp->regs + HQVDP_WR_PLUG + i * 4);
 736
 737         sti_hqvdp_init_plugs(hqvdp);
 738
 739         /* Authorize Idle Mode */
 740         writel(STARTUP_CTRL1_AUTH_IDLE, hqvdp->regs + HQVDP_MBX_STARTUP_CTRL1);
 741
 742         /* Prevent VTG interruption during the boot */
 743         writel(SOFT_VSYNC_SW_CTRL_IRQ, hqvdp->regs + HQVDP_MBX_SOFT_VSYNC);
 744         writel(0, hqvdp->regs + HQVDP_MBX_NEXT_CMD);
 745
 746         /* Download PMEM & DMEM */
 747         for (i = 0; i < header->pmem_size / 4; i++)
 748                 writel(fw_pmem[i], hqvdp->regs + HQVDP_PMEM + i * 4);
 749         for (i = 0; i < header->dmem_size / 4; i++)
 750                 writel(fw_dmem[i], hqvdp->regs + HQVDP_DMEM + i * 4);
 751
 752         /* Enable fetch */
 753         writel(STARTUP_CTRL2_FETCH_EN, hqvdp->regs + HQVDP_MBX_STARTUP_CTRL2);
 754
 755         /* Wait end of boot */
 756         for (i = 0; i < POLL_MAX_ATTEMPT; i++) {
 757                 if (readl(hqvdp->regs + HQVDP_MBX_INFO_XP70)
 758                                 & INFO_XP70_FW_READY)
 759                         break;
 760                 msleep(POLL_DELAY_MS);
 761         }
 762         if (i == POLL_MAX_ATTEMPT) {
 763                 DRM_ERROR("Could not boot\n");
 764                 goto out;
 765         }
 766
 767         /* Launch Vsync */
 768         writel(SOFT_VSYNC_HW, hqvdp->regs + HQVDP_MBX_SOFT_VSYNC);
 769
 770         DRM_INFO("HQVDP XP70 initialized\n");
 771
 772         hqvdp->xp70_initialized = true;
 773
 774 out:
 775         release_firmware(firmware);
 776 }
 777
 778 static void sti_hqvdp_atomic_update(struct drm_plane *drm_plane,
 779                                     struct drm_plane_state *oldstate)
 780 {
 781         struct drm_plane_state *state = drm_plane->state;
 782         struct sti_plane *plane = to_sti_plane(drm_plane);
 783         struct sti_hqvdp *hqvdp = to_sti_hqvdp(plane);
 784         struct drm_crtc *crtc = state->crtc;
 785         struct sti_mixer *mixer = to_sti_mixer(crtc);
 786         struct drm_framebuffer *fb = state->fb;
 787         struct drm_display_mode *mode = &crtc->mode;
 788         int dst_x = state->crtc_x;
 789         int dst_y = state->crtc_y;
 790         int dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
 791         int dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
 792         /* src_x are in 16.16 format */
 793         int src_x = state->src_x >> 16;
 794         int src_y = state->src_y >> 16;
 795         int src_w = state->src_w >> 16;
 796         int src_h = state->src_h >> 16;
 797         bool first_prepare = plane->status == STI_PLANE_DISABLED ? true : false;
 798         struct drm_gem_cma_object *cma_obj;
 799         struct sti_hqvdp_cmd *cmd;
 800         int scale_h, scale_v;
 801         int cmd_offset;
 802
 803         DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
 804                       crtc->base.id, sti_mixer_to_str(mixer),
 805                       drm_plane->base.id, sti_plane_to_str(plane));
 806         DRM_DEBUG_KMS("%s dst=(%dx%d)@(%d,%d) - src=(%dx%d)@(%d,%d)\n",
 807                       sti_plane_to_str(plane),
 808                       dst_w, dst_h, dst_x, dst_y,
 809                       src_w, src_h, src_x, src_y);
 810
 811         cmd_offset = sti_hqvdp_get_free_cmd(hqvdp);
 812         if (cmd_offset == -1) {
 813                 DRM_ERROR("No available hqvdp_cmd now\n");
 814                 return;
 815         }
 816         cmd = hqvdp->hqvdp_cmd + cmd_offset;
 817
 818         if (!sti_hqvdp_check_hw_scaling(hqvdp, mode,
 819                                         src_w, src_h,
 820                                         dst_w, dst_h)) {
 821                 DRM_ERROR("Scaling beyond HW capabilities\n");
 822                 return;
 823         }
 824
 825         /* Static parameters, defaulting to progressive mode */
 826         cmd->top.config = TOP_CONFIG_PROGRESSIVE;
 827         cmd->top.mem_format = TOP_MEM_FORMAT_DFLT;
 828         cmd->hvsrc.param_ctrl = HVSRC_PARAM_CTRL_DFLT;
 829         cmd->csdi.config = CSDI_CONFIG_PROG;
 830
 831         /* VC1RE, FMD bypassed : keep everything set to 0
 832          * IQI/P2I bypassed */
 833         cmd->iqi.config = IQI_CONFIG_DFLT;
 834         cmd->iqi.con_bri = IQI_CON_BRI_DFLT;
 835         cmd->iqi.sat_gain = IQI_SAT_GAIN_DFLT;
 836         cmd->iqi.pxf_conf = IQI_PXF_CONF_DFLT;
 837
 838         cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
 839         if (!cma_obj) {
 840                 DRM_ERROR("Can't get CMA GEM object for fb\n");
 841                 return;
 842         }
 843
 844         DRM_DEBUG_DRIVER("drm FB:%d format:%.4s phys@:0x%lx\n", fb->base.id,
 845                          (char *)&fb->pixel_format,
 846                          (unsigned long)cma_obj->paddr);
 847
 848         /* Buffer planes address */
 849         cmd->top.current_luma = (u32)cma_obj->paddr + fb->offsets[0];
 850         cmd->top.current_chroma = (u32)cma_obj->paddr + fb->offsets[1];
 851
 852         /* Pitches */
 853         cmd->top.luma_processed_pitch = fb->pitches[0];
 854         cmd->top.luma_src_pitch = fb->pitches[0];
 855         cmd->top.chroma_processed_pitch = fb->pitches[1];
 856         cmd->top.chroma_src_pitch = fb->pitches[1];
 857
 858         /* Input / output size
 859          * Align to upper even value */
 860         dst_w = ALIGN(dst_w, 2);
 861         dst_h = ALIGN(dst_h, 2);
 862
 863         if ((src_w > MAX_WIDTH) || (src_w < MIN_WIDTH) ||
 864             (src_h > MAX_HEIGHT) || (src_h < MIN_HEIGHT) ||
 865             (dst_w > MAX_WIDTH) || (dst_w < MIN_WIDTH) ||
 866             (dst_h > MAX_HEIGHT) || (dst_h < MIN_HEIGHT)) {
 867                 DRM_ERROR("Invalid in/out size %dx%d -> %dx%d\n",
 868                           src_w, src_h,
 869                           dst_w, dst_h);
 870                 return;
 871         }
 872
 873         cmd->top.input_viewport_size = src_h << 16 | src_w;
 874         cmd->top.input_frame_size = src_h << 16 | src_w;
 875         cmd->hvsrc.output_picture_size = dst_h << 16 | dst_w;
 876         cmd->top.input_viewport_ori = src_y << 16 | src_x;
 877
 878         /* Handle interlaced */
 879         if (fb->flags & DRM_MODE_FB_INTERLACED) {
 880                 /* Top field to display */
 881                 cmd->top.config = TOP_CONFIG_INTER_TOP;
 882
 883                 /* Update pitches and vert size */
 884                 cmd->top.input_frame_size = (src_h / 2) << 16 | src_w;
 885                 cmd->top.luma_processed_pitch *= 2;
 886                 cmd->top.luma_src_pitch *= 2;
 887                 cmd->top.chroma_processed_pitch *= 2;
 888                 cmd->top.chroma_src_pitch *= 2;
 889
 890                 /* Enable directional deinterlacing processing */
 891                 cmd->csdi.config = CSDI_CONFIG_INTER_DIR;
 892                 cmd->csdi.config2 = CSDI_CONFIG2_DFLT;
 893                 cmd->csdi.dcdi_config = CSDI_DCDI_CONFIG_DFLT;
 894         }
 895
 896         /* Update hvsrc lut coef */
 897         scale_h = SCALE_FACTOR * dst_w / src_w;
 898         sti_hqvdp_update_hvsrc(HVSRC_HORI, scale_h, &cmd->hvsrc);
 899
 900         scale_v = SCALE_FACTOR * dst_h / src_h;
 901         sti_hqvdp_update_hvsrc(HVSRC_VERT, scale_v, &cmd->hvsrc);
 902
 903         if (first_prepare) {
 904                 /* Start HQVDP XP70 coprocessor */
 905                 sti_hqvdp_start_xp70(hqvdp);
 906
 907                 /* Prevent VTG shutdown */
 908                 if (clk_prepare_enable(hqvdp->clk_pix_main)) {
 909                         DRM_ERROR("Failed to prepare/enable pix main clk\n");
 910                         return;
 911                 }
 912
 913                 /* Register VTG Vsync callback to handle bottom fields */
 914                 if (sti_vtg_register_client(hqvdp->vtg,
 915                                             &hqvdp->vtg_nb,
 916                                             crtc)) {
 917                         DRM_ERROR("Cannot register VTG notifier\n");
 918                         return;
 919                 }
 920         }
 921
 922         writel(hqvdp->hqvdp_cmd_paddr + cmd_offset,
 923                hqvdp->regs + HQVDP_MBX_NEXT_CMD);
 924
 925         hqvdp->curr_field_count++;
 926
 927         /* Interlaced : get ready to display the bottom field at next Vsync */
 928         if (fb->flags & DRM_MODE_FB_INTERLACED)
 929                 hqvdp->btm_field_pending = true;
 930
 931         dev_dbg(hqvdp->dev, "%s Posted command:0x%x\n",
 932                 __func__, hqvdp->hqvdp_cmd_paddr + cmd_offset);
 933
 934         plane->status = STI_PLANE_UPDATED;
 935 }
 936
 937 static void sti_hqvdp_atomic_disable(struct drm_plane *drm_plane,
 938                                      struct drm_plane_state *oldstate)
 939 {
 940         struct sti_plane *plane = to_sti_plane(drm_plane);
 941         struct sti_mixer *mixer = to_sti_mixer(drm_plane->crtc);
 942
 943         if (!drm_plane->crtc) {
 944                 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n",
 945                                  drm_plane->base.id);
 946                 return;
 947         }
 948
 949         DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n",
 950                          drm_plane->crtc->base.id, sti_mixer_to_str(mixer),
 951                          drm_plane->base.id, sti_plane_to_str(plane));
 952
 953         plane->status = STI_PLANE_DISABLING;
 954 }
 955
 956 static const struct drm_plane_helper_funcs sti_hqvdp_helpers_funcs = {
 957         .atomic_update = sti_hqvdp_atomic_update,
 958         .atomic_disable = sti_hqvdp_atomic_disable,
 959 };
 960
 961 static struct drm_plane *sti_hqvdp_create(struct drm_device *drm_dev,
 962                                           struct device *dev, int desc)
 963 {
 964         struct sti_hqvdp *hqvdp = dev_get_drvdata(dev);
 965         int res;
 966
 967         hqvdp->plane.desc = desc;
 968         hqvdp->plane.status = STI_PLANE_DISABLED;
 969
 970         sti_hqvdp_init(hqvdp);
 971
 972         res = drm_universal_plane_init(drm_dev, &hqvdp->plane.drm_plane, 1,
 973                                        &sti_plane_helpers_funcs,
 974                                        hqvdp_supported_formats,
 975                                        ARRAY_SIZE(hqvdp_supported_formats),
 976                                        DRM_PLANE_TYPE_OVERLAY);
 977         if (res) {
 978                 DRM_ERROR("Failed to initialize universal plane\n");
 979                 return NULL;
 980         }
 981
 982         drm_plane_helper_add(&hqvdp->plane.drm_plane, &sti_hqvdp_helpers_funcs);
 983
 984         sti_plane_init_property(&hqvdp->plane, DRM_PLANE_TYPE_OVERLAY);
 985
 986         return &hqvdp->plane.drm_plane;
 987 }
 988
 989 int sti_hqvdp_bind(struct device *dev, struct device *master, void *data)
 990 {
 991         struct sti_hqvdp *hqvdp = dev_get_drvdata(dev);
 992         struct drm_device *drm_dev = data;
 993         struct drm_plane *plane;
 994
 995         DRM_DEBUG_DRIVER("\n");
 996
 997         hqvdp->drm_dev = drm_dev;
 998
 999         /* Create HQVDP plane once xp70 is initialized */
1000         plane = sti_hqvdp_create(drm_dev, hqvdp->dev, STI_HQVDP_0);
1001         if (!plane)
1002                 DRM_ERROR("Can't create HQVDP plane\n");
1003
1004         return 0;
1005 }
1006
1007 static void sti_hqvdp_unbind(struct device *dev,
1008                 struct device *master, void *data)
1009 {
1010         /* do nothing */
1011 }
1012
1013 static const struct component_ops sti_hqvdp_ops = {
1014         .bind = sti_hqvdp_bind,
1015         .unbind = sti_hqvdp_unbind,
1016 };
1017
1018 static int sti_hqvdp_probe(struct platform_device *pdev)
1019 {
1020         struct device *dev = &pdev->dev;
1021         struct device_node *vtg_np;
1022         struct sti_hqvdp *hqvdp;
1023         struct resource *res;
1024
1025         DRM_DEBUG_DRIVER("\n");
1026
1027         hqvdp = devm_kzalloc(dev, sizeof(*hqvdp), GFP_KERNEL);
1028         if (!hqvdp) {
1029                 DRM_ERROR("Failed to allocate HQVDP context\n");
1030                 return -ENOMEM;
1031         }
1032
1033         hqvdp->dev = dev;
1034
1035         /* Get Memory resources */
1036         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1037         if (res == NULL) {
1038                 DRM_ERROR("Get memory resource failed\n");
1039                 return -ENXIO;
1040         }
1041         hqvdp->regs = devm_ioremap(dev, res->start, resource_size(res));
1042         if (hqvdp->regs == NULL) {
1043                 DRM_ERROR("Register mapping failed\n");
1044                 return -ENXIO;
1045         }
1046
1047         /* Get clock resources */
1048         hqvdp->clk = devm_clk_get(dev, "hqvdp");
1049         hqvdp->clk_pix_main = devm_clk_get(dev, "pix_main");
1050         if (IS_ERR(hqvdp->clk) || IS_ERR(hqvdp->clk_pix_main)) {
1051                 DRM_ERROR("Cannot get clocks\n");
1052                 return -ENXIO;
1053         }
1054
1055         /* Get reset resources */
1056         hqvdp->reset = devm_reset_control_get(dev, "hqvdp");
1057         if (!IS_ERR(hqvdp->reset))
1058                 reset_control_deassert(hqvdp->reset);
1059
1060         vtg_np = of_parse_phandle(pdev->dev.of_node, "st,vtg", 0);
1061         if (vtg_np)
1062                 hqvdp->vtg = of_vtg_find(vtg_np);
1063
1064         platform_set_drvdata(pdev, hqvdp);
1065
1066         return component_add(&pdev->dev, &sti_hqvdp_ops);
1067 }
1068
1069 static int sti_hqvdp_remove(struct platform_device *pdev)
1070 {
1071         component_del(&pdev->dev, &sti_hqvdp_ops);
1072         return 0;
1073 }
1074
1075 static struct of_device_id hqvdp_of_match[] = {
1076         { .compatible = "st,stih407-hqvdp", },
1077         { /* end node */ }
1078 };
1079 MODULE_DEVICE_TABLE(of, hqvdp_of_match);
1080
1081 struct platform_driver sti_hqvdp_driver = {
1082         .driver = {
1083                 .name = "sti-hqvdp",
1084                 .owner = THIS_MODULE,
1085                 .of_match_table = hqvdp_of_match,
1086         },
1087         .probe = sti_hqvdp_probe,
1088         .remove = sti_hqvdp_remove,
1089 };
1090
1091 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
1092 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
1093 MODULE_LICENSE("GPL");