drivers/gpu/drm/arm/malidp_hw.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *
   4  * (C) COPYRIGHT 2013-2016 ARM Limited. All rights reserved.
   5  *
   6  * ARM Mali DP hardware manipulation routines.
   7  */
   8
   9 #ifndef __MALIDP_HW_H__
  10 #define __MALIDP_HW_H__
  11
  12 #include <linux/bitops.h>
  13 #include "malidp_regs.h"
  14
  15 struct videomode;
  16 struct clk;
  17
  18 /* Mali DP IP blocks */
  19 enum {
  20         MALIDP_DE_BLOCK = 0,
  21         MALIDP_SE_BLOCK,
  22         MALIDP_DC_BLOCK
  23 };
  24
  25 /* Mali DP layer IDs */
  26 enum {
  27         DE_VIDEO1 = BIT(0),
  28         DE_GRAPHICS1 = BIT(1),
  29         DE_GRAPHICS2 = BIT(2), /* used only in DP500 */
  30         DE_VIDEO2 = BIT(3),
  31         DE_SMART = BIT(4),
  32         SE_MEMWRITE = BIT(5),
  33 };
  34
  35 enum rotation_features {
  36         ROTATE_NONE,            /* does not support rotation at all */
  37         ROTATE_ANY,             /* supports rotation on any buffers */
  38         ROTATE_COMPRESSED,      /* supports rotation only on compressed buffers */
  39 };
  40
  41 struct malidp_format_id {
  42         u32 format;             /* DRM fourcc */
  43         u8 layer;               /* bitmask of layers supporting it */
  44         u8 id;                  /* used internally */
  45 };
  46
  47 #define MALIDP_INVALID_FORMAT_ID        0xff
  48
  49 /*
  50  * hide the differences between register maps
  51  * by using a common structure to hold the
  52  * base register offsets
  53  */
  54
  55 struct malidp_irq_map {
  56         u32 irq_mask;           /* mask of IRQs that can be enabled in the block */
  57         u32 vsync_irq;          /* IRQ bit used for signaling during VSYNC */
  58         u32 err_mask;           /* mask of bits that represent errors */
  59 };
  60
  61 struct malidp_layer {
  62         u16 id;                 /* layer ID */
  63         u16 base;               /* address offset for the register bank */
  64         u16 ptr;                /* address offset for the pointer register */
  65         u16 stride_offset;      /* offset to the first stride register. */
  66         s16 yuv2rgb_offset;     /* offset to the YUV->RGB matrix entries */
  67         u16 mmu_ctrl_offset;    /* offset to the MMU control register */
  68         enum rotation_features rot;     /* type of rotation supported */
  69         /* address offset for the AFBC decoder registers */
  70         u16 afbc_decoder_offset;
  71 };
  72
  73 enum malidp_scaling_coeff_set {
  74         MALIDP_UPSCALING_COEFFS = 1,
  75         MALIDP_DOWNSCALING_1_5_COEFFS = 2,
  76         MALIDP_DOWNSCALING_2_COEFFS = 3,
  77         MALIDP_DOWNSCALING_2_75_COEFFS = 4,
  78         MALIDP_DOWNSCALING_4_COEFFS = 5,
  79 };
  80
  81 struct malidp_se_config {
  82         u8 scale_enable : 1;
  83         u8 enhancer_enable : 1;
  84         u8 hcoeff : 3;
  85         u8 vcoeff : 3;
  86         u8 plane_src_id;
  87         u16 input_w, input_h;
  88         u16 output_w, output_h;
  89         u32 h_init_phase, h_delta_phase;
  90         u32 v_init_phase, v_delta_phase;
  91 };
  92
  93 /* regmap features */
  94 #define MALIDP_REGMAP_HAS_CLEARIRQ                              BIT(0)
  95 #define MALIDP_DEVICE_AFBC_SUPPORT_SPLIT                        BIT(1)
  96 #define MALIDP_DEVICE_AFBC_YUV_420_10_SUPPORT_SPLIT             BIT(2)
  97 #define MALIDP_DEVICE_AFBC_YUYV_USE_422_P2                      BIT(3)
  98
  99 struct malidp_hw_regmap {
 100         /* address offset of the DE register bank */
 101         /* is always 0x0000 */
 102         /* address offset of the DE coefficients registers */
 103         const u16 coeffs_base;
 104         /* address offset of the SE registers bank */
 105         const u16 se_base;
 106         /* address offset of the DC registers bank */
 107         const u16 dc_base;
 108
 109         /* address offset for the output depth register */
 110         const u16 out_depth_base;
 111
 112         /* bitmap with register map features */
 113         const u8 features;
 114
 115         /* list of supported layers */
 116         const u8 n_layers;
 117         const struct malidp_layer *layers;
 118
 119         const struct malidp_irq_map de_irq_map;
 120         const struct malidp_irq_map se_irq_map;
 121         const struct malidp_irq_map dc_irq_map;
 122
 123         /* list of supported pixel formats for each layer */
 124         const struct malidp_format_id *pixel_formats;
 125         const u8 n_pixel_formats;
 126
 127         /* pitch alignment requirement in bytes */
 128         const u8 bus_align_bytes;
 129 };
 130
 131 /* device features */
 132 /* Unlike DP550/650, DP500 has 3 stride registers in its video layer. */
 133 #define MALIDP_DEVICE_LV_HAS_3_STRIDES  BIT(0)
 134
 135 struct malidp_hw_device;
 136
 137 /*
 138  * Static structure containing hardware specific data and pointers to
 139  * functions that behave differently between various versions of the IP.
 140  */
 141 struct malidp_hw {
 142         const struct malidp_hw_regmap map;
 143
 144         /*
 145          * Validate the driver instance against the hardware bits
 146          */
 147         int (*query_hw)(struct malidp_hw_device *hwdev);
 148
 149         /*
 150          * Set the hardware into config mode, ready to accept mode changes
 151          */
 152         void (*enter_config_mode)(struct malidp_hw_device *hwdev);
 153
 154         /*
 155          * Tell hardware to exit configuration mode
 156          */
 157         void (*leave_config_mode)(struct malidp_hw_device *hwdev);
 158
 159         /*
 160          * Query if hardware is in configuration mode
 161          */
 162         bool (*in_config_mode)(struct malidp_hw_device *hwdev);
 163
 164         /*
 165          * Set/clear configuration valid flag for hardware parameters that can
 166          * be changed outside the configuration mode to the given value.
 167          * Hardware will use the new settings when config valid is set,
 168          * after the end of the current buffer scanout, and will ignore
 169          * any new values for those parameters if config valid flag is cleared
 170          */
 171         void (*set_config_valid)(struct malidp_hw_device *hwdev, u8 value);
 172
 173         /*
 174          * Set a new mode in hardware. Requires the hardware to be in
 175          * configuration mode before this function is called.
 176          */
 177         void (*modeset)(struct malidp_hw_device *hwdev, struct videomode *m);
 178
 179         /*
 180          * Calculate the required rotation memory given the active area
 181          * and the buffer format.
 182          */
 183         int (*rotmem_required)(struct malidp_hw_device *hwdev, u16 w, u16 h,
 184                                u32 fmt, bool has_modifier);
 185
 186         int (*se_set_scaling_coeffs)(struct malidp_hw_device *hwdev,
 187                                      struct malidp_se_config *se_config,
 188                                      struct malidp_se_config *old_config);
 189
 190         long (*se_calc_mclk)(struct malidp_hw_device *hwdev,
 191                              struct malidp_se_config *se_config,
 192                              struct videomode *vm);
 193         /*
 194          * Enable writing to memory the content of the next frame
 195          * @param hwdev - malidp_hw_device structure containing the HW description
 196          * @param addrs - array of addresses for each plane
 197          * @param pitches - array of pitches for each plane
 198          * @param num_planes - number of planes to be written
 199          * @param w - width of the output frame
 200          * @param h - height of the output frame
 201          * @param fmt_id - internal format ID of output buffer
 202          */
 203         int (*enable_memwrite)(struct malidp_hw_device *hwdev, dma_addr_t *addrs,
 204                                s32 *pitches, int num_planes, u16 w, u16 h, u32 fmt_id,
 205                                const s16 *rgb2yuv_coeffs);
 206
 207         /*
 208          * Disable the writing to memory of the next frame's content.
 209          */
 210         void (*disable_memwrite)(struct malidp_hw_device *hwdev);
 211
 212         u8 features;
 213 };
 214
 215 /* Supported variants of the hardware */
 216 enum {
 217         MALIDP_500 = 0,
 218         MALIDP_550,
 219         MALIDP_650,
 220         /* keep the next entry last */
 221         MALIDP_MAX_DEVICES
 222 };
 223
 224 extern const struct malidp_hw malidp_device[MALIDP_MAX_DEVICES];
 225
 226 /*
 227  * Structure used by the driver during runtime operation.
 228  */
 229 struct malidp_hw_device {
 230         struct malidp_hw *hw;
 231         void __iomem *regs;
 232
 233         /* APB clock */
 234         struct clk *pclk;
 235         /* AXI clock */
 236         struct clk *aclk;
 237         /* main clock for display core */
 238         struct clk *mclk;
 239         /* pixel clock for display core */
 240         struct clk *pxlclk;
 241
 242         u8 min_line_size;
 243         u16 max_line_size;
 244         u32 output_color_depth;
 245
 246         /* track the device PM state */
 247         bool pm_suspended;
 248
 249         /* track the SE memory writeback state */
 250         u8 mw_state;
 251
 252         /* size of memory used for rotating layers, up to two banks available */
 253         u32 rotation_memory[2];
 254
 255         /* priority level of RQOS register used for driven the ARQOS signal */
 256         u32 arqos_value;
 257 };
 258
 259 static inline u32 malidp_hw_read(struct malidp_hw_device *hwdev, u32 reg)
 260 {
 261         WARN_ON(hwdev->pm_suspended);
 262         return readl(hwdev->regs + reg);
 263 }
 264
 265 static inline void malidp_hw_write(struct malidp_hw_device *hwdev,
 266                                    u32 value, u32 reg)
 267 {
 268         WARN_ON(hwdev->pm_suspended);
 269         writel(value, hwdev->regs + reg);
 270 }
 271
 272 static inline void malidp_hw_setbits(struct malidp_hw_device *hwdev,
 273                                      u32 mask, u32 reg)
 274 {
 275         u32 data = malidp_hw_read(hwdev, reg);
 276
 277         data |= mask;
 278         malidp_hw_write(hwdev, data, reg);
 279 }
 280
 281 static inline void malidp_hw_clearbits(struct malidp_hw_device *hwdev,
 282                                        u32 mask, u32 reg)
 283 {
 284         u32 data = malidp_hw_read(hwdev, reg);
 285
 286         data &= ~mask;
 287         malidp_hw_write(hwdev, data, reg);
 288 }
 289
 290 static inline u32 malidp_get_block_base(struct malidp_hw_device *hwdev,
 291                                         u8 block)
 292 {
 293         switch (block) {
 294         case MALIDP_SE_BLOCK:
 295                 return hwdev->hw->map.se_base;
 296         case MALIDP_DC_BLOCK:
 297                 return hwdev->hw->map.dc_base;
 298         }
 299
 300         return 0;
 301 }
 302
 303 static inline void malidp_hw_disable_irq(struct malidp_hw_device *hwdev,
 304                                          u8 block, u32 irq)
 305 {
 306         u32 base = malidp_get_block_base(hwdev, block);
 307
 308         malidp_hw_clearbits(hwdev, irq, base + MALIDP_REG_MASKIRQ);
 309 }
 310
 311 static inline void malidp_hw_enable_irq(struct malidp_hw_device *hwdev,
 312                                         u8 block, u32 irq)
 313 {
 314         u32 base = malidp_get_block_base(hwdev, block);
 315
 316         malidp_hw_setbits(hwdev, irq, base + MALIDP_REG_MASKIRQ);
 317 }
 318
 319 int malidp_de_irq_init(struct drm_device *drm, int irq);
 320 void malidp_se_irq_hw_init(struct malidp_hw_device *hwdev);
 321 void malidp_de_irq_hw_init(struct malidp_hw_device *hwdev);
 322 void malidp_de_irq_fini(struct malidp_hw_device *hwdev);
 323 int malidp_se_irq_init(struct drm_device *drm, int irq);
 324 void malidp_se_irq_fini(struct malidp_hw_device *hwdev);
 325
 326 u8 malidp_hw_get_format_id(const struct malidp_hw_regmap *map,
 327                            u8 layer_id, u32 format, bool has_modifier);
 328
 329 int malidp_format_get_bpp(u32 fmt);
 330
 331 static inline u8 malidp_hw_get_pitch_align(struct malidp_hw_device *hwdev, bool rotated)
 332 {
 333         /*
 334          * only hardware that cannot do 8 bytes bus alignments have further
 335          * constraints on rotated planes
 336          */
 337         if (hwdev->hw->map.bus_align_bytes == 8)
 338                 return 8;
 339         else
 340                 return hwdev->hw->map.bus_align_bytes << (rotated ? 2 : 0);
 341 }
 342
 343 /* U16.16 */
 344 #define FP_1_00000      0x00010000      /* 1.0 */
 345 #define FP_0_66667      0x0000AAAA      /* 0.6667 = 1/1.5 */
 346 #define FP_0_50000      0x00008000      /* 0.5 = 1/2 */
 347 #define FP_0_36363      0x00005D17      /* 0.36363 = 1/2.75 */
 348 #define FP_0_25000      0x00004000      /* 0.25 = 1/4 */
 349
 350 static inline enum malidp_scaling_coeff_set
 351 malidp_se_select_coeffs(u32 upscale_factor)
 352 {
 353         return (upscale_factor >= FP_1_00000) ? MALIDP_UPSCALING_COEFFS :
 354                (upscale_factor >= FP_0_66667) ? MALIDP_DOWNSCALING_1_5_COEFFS :
 355                (upscale_factor >= FP_0_50000) ? MALIDP_DOWNSCALING_2_COEFFS :
 356                (upscale_factor >= FP_0_36363) ? MALIDP_DOWNSCALING_2_75_COEFFS :
 357                MALIDP_DOWNSCALING_4_COEFFS;
 358 }
 359
 360 #undef FP_0_25000
 361 #undef FP_0_36363
 362 #undef FP_0_50000
 363 #undef FP_0_66667
 364 #undef FP_1_00000
 365
 366 static inline void malidp_se_set_enh_coeffs(struct malidp_hw_device *hwdev)
 367 {
 368         static const s32 enhancer_coeffs[] = {
 369                 -8, -8, -8, -8, 128, -8, -8, -8, -8
 370         };
 371         u32 val = MALIDP_SE_SET_ENH_LIMIT_LOW(MALIDP_SE_ENH_LOW_LEVEL) |
 372                   MALIDP_SE_SET_ENH_LIMIT_HIGH(MALIDP_SE_ENH_HIGH_LEVEL);
 373         u32 image_enh = hwdev->hw->map.se_base +
 374                         ((hwdev->hw->map.features & MALIDP_REGMAP_HAS_CLEARIRQ) ?
 375                          0x10 : 0xC) + MALIDP_SE_IMAGE_ENH;
 376         u32 enh_coeffs = image_enh + MALIDP_SE_ENH_COEFF0;
 377         int i;
 378
 379         malidp_hw_write(hwdev, val, image_enh);
 380         for (i = 0; i < ARRAY_SIZE(enhancer_coeffs); ++i)
 381                 malidp_hw_write(hwdev, enhancer_coeffs[i], enh_coeffs + i * 4);
 382 }
 383
 384 /*
 385  * background color components are defined as 12bits values,
 386  * they will be shifted right when stored on hardware that
 387  * supports only 8bits per channel
 388  */
 389 #define MALIDP_BGND_COLOR_R             0x000
 390 #define MALIDP_BGND_COLOR_G             0x000
 391 #define MALIDP_BGND_COLOR_B             0x000
 392
 393 #define MALIDP_COLORADJ_NUM_COEFFS      12
 394 #define MALIDP_COEFFTAB_NUM_COEFFS      64
 395
 396 #define MALIDP_GAMMA_LUT_SIZE           4096
 397
 398 #define AFBC_SIZE_MASK          AFBC_FORMAT_MOD_BLOCK_SIZE_MASK
 399 #define AFBC_SIZE_16X16         AFBC_FORMAT_MOD_BLOCK_SIZE_16x16
 400 #define AFBC_YTR                AFBC_FORMAT_MOD_YTR
 401 #define AFBC_SPARSE             AFBC_FORMAT_MOD_SPARSE
 402 #define AFBC_CBR                AFBC_FORMAT_MOD_CBR
 403 #define AFBC_SPLIT              AFBC_FORMAT_MOD_SPLIT
 404 #define AFBC_TILED              AFBC_FORMAT_MOD_TILED
 405 #define AFBC_SC                 AFBC_FORMAT_MOD_SC
 406
 407 #define AFBC_MOD_VALID_BITS     (AFBC_SIZE_MASK | AFBC_YTR | AFBC_SPLIT | \
 408                                  AFBC_SPARSE | AFBC_CBR | AFBC_TILED | AFBC_SC)
 409
 410 extern const u64 malidp_format_modifiers[];
 411
 412 #endif  /* __MALIDP_HW_H__ */