drivers/gpu/drm/amd/display/dc/dce/dce_abm.c

   1 /*
   2  * Copyright 2012-16 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: AMD
  23  *
  24  */
  25
  26 #include <linux/slab.h>
  27
  28 #include "dce_abm.h"
  29 #include "dm_services.h"
  30 #include "reg_helper.h"
  31 #include "fixed31_32.h"
  32 #include "dc.h"
  33
  34 #include "atom.h"
  35
  36
  37 #define TO_DCE_ABM(abm)\
  38         container_of(abm, struct dce_abm, base)
  39
  40 #define REG(reg) \
  41         (abm_dce->regs->reg)
  42
  43 #undef FN
  44 #define FN(reg_name, field_name) \
  45         abm_dce->abm_shift->field_name, abm_dce->abm_mask->field_name
  46
  47 #define DC_LOGGER \
  48         abm->ctx->logger
  49 #define CTX \
  50         abm_dce->base.ctx
  51
  52 #define MCP_ABM_LEVEL_SET 0x65
  53 #define MCP_ABM_PIPE_SET 0x66
  54 #define MCP_BL_SET 0x67
  55
  56 #define MCP_DISABLE_ABM_IMMEDIATELY 255
  57
  58 static bool dce_abm_set_pipe(struct abm *abm, uint32_t controller_id, uint32_t panel_inst)
  59 {
  60         struct dce_abm *abm_dce = TO_DCE_ABM(abm);
  61         uint32_t rampingBoundary = 0xFFFF;
  62
  63         if (abm->dmcu_is_running == false)
  64                 return true;
  65
  66         REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
  67                         1, 80000);
  68
  69         /* set ramping boundary */
  70         REG_WRITE(MASTER_COMM_DATA_REG1, rampingBoundary);
  71
  72         /* setDMCUParam_Pipe */
  73         REG_UPDATE_2(MASTER_COMM_CMD_REG,
  74                         MASTER_COMM_CMD_REG_BYTE0, MCP_ABM_PIPE_SET,
  75                         MASTER_COMM_CMD_REG_BYTE1, controller_id);
  76
  77         /* notifyDMCUMsg */
  78         REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
  79
  80         REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
  81                         1, 80000);
  82
  83         return true;
  84 }
  85
  86 static void dmcu_set_backlight_level(
  87         struct dce_abm *abm_dce,
  88         uint32_t backlight_pwm_u16_16,
  89         uint32_t frame_ramp,
  90         uint32_t controller_id,
  91         uint32_t panel_id)
  92 {
  93         unsigned int backlight_8_bit = 0;
  94         uint32_t s2;
  95
  96         if (backlight_pwm_u16_16 & 0x10000)
  97                 // Check for max backlight condition
  98                 backlight_8_bit = 0xFF;
  99         else
 100                 // Take MSB of fractional part since backlight is not max
 101                 backlight_8_bit = (backlight_pwm_u16_16 >> 8) & 0xFF;
 102
 103         dce_abm_set_pipe(&abm_dce->base, controller_id, panel_id);
 104
 105         /* waitDMCUReadyForCmd */
 106         REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT,
 107                         0, 1, 80000);
 108
 109         /* setDMCUParam_BL */
 110         REG_UPDATE(BL1_PWM_USER_LEVEL, BL1_PWM_USER_LEVEL, backlight_pwm_u16_16);
 111
 112         /* write ramp */
 113         if (controller_id == 0)
 114                 frame_ramp = 0;
 115         REG_WRITE(MASTER_COMM_DATA_REG1, frame_ramp);
 116
 117         /* setDMCUParam_Cmd */
 118         REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, MCP_BL_SET);
 119
 120         /* notifyDMCUMsg */
 121         REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
 122
 123         /* UpdateRequestedBacklightLevel */
 124         s2 = REG_READ(BIOS_SCRATCH_2);
 125
 126         s2 &= ~ATOM_S2_CURRENT_BL_LEVEL_MASK;
 127         backlight_8_bit &= (ATOM_S2_CURRENT_BL_LEVEL_MASK >>
 128                                 ATOM_S2_CURRENT_BL_LEVEL_SHIFT);
 129         s2 |= (backlight_8_bit << ATOM_S2_CURRENT_BL_LEVEL_SHIFT);
 130
 131         REG_WRITE(BIOS_SCRATCH_2, s2);
 132
 133         /* waitDMCUReadyForCmd */
 134         REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT,
 135                         0, 1, 80000);
 136 }
 137
 138 static void dce_abm_init(struct abm *abm, uint32_t backlight)
 139 {
 140         struct dce_abm *abm_dce = TO_DCE_ABM(abm);
 141
 142         REG_WRITE(DC_ABM1_HG_SAMPLE_RATE, 0x103);
 143         REG_WRITE(DC_ABM1_HG_SAMPLE_RATE, 0x101);
 144         REG_WRITE(DC_ABM1_LS_SAMPLE_RATE, 0x103);
 145         REG_WRITE(DC_ABM1_LS_SAMPLE_RATE, 0x101);
 146         REG_WRITE(BL1_PWM_BL_UPDATE_SAMPLE_RATE, 0x101);
 147
 148         REG_SET_3(DC_ABM1_HG_MISC_CTRL, 0,
 149                         ABM1_HG_NUM_OF_BINS_SEL, 0,
 150                         ABM1_HG_VMAX_SEL, 1,
 151                         ABM1_HG_BIN_BITWIDTH_SIZE_SEL, 0);
 152
 153         REG_SET_3(DC_ABM1_IPCSC_COEFF_SEL, 0,
 154                         ABM1_IPCSC_COEFF_SEL_R, 2,
 155                         ABM1_IPCSC_COEFF_SEL_G, 4,
 156                         ABM1_IPCSC_COEFF_SEL_B, 2);
 157
 158         REG_UPDATE(BL1_PWM_CURRENT_ABM_LEVEL,
 159                         BL1_PWM_CURRENT_ABM_LEVEL, backlight);
 160
 161         REG_UPDATE(BL1_PWM_TARGET_ABM_LEVEL,
 162                         BL1_PWM_TARGET_ABM_LEVEL, backlight);
 163
 164         REG_UPDATE(BL1_PWM_USER_LEVEL,
 165                         BL1_PWM_USER_LEVEL, backlight);
 166
 167         REG_UPDATE_2(DC_ABM1_LS_MIN_MAX_PIXEL_VALUE_THRES,
 168                         ABM1_LS_MIN_PIXEL_VALUE_THRES, 0,
 169                         ABM1_LS_MAX_PIXEL_VALUE_THRES, 1000);
 170
 171         REG_SET_3(DC_ABM1_HGLS_REG_READ_PROGRESS, 0,
 172                         ABM1_HG_REG_READ_MISSED_FRAME_CLEAR, 1,
 173                         ABM1_LS_REG_READ_MISSED_FRAME_CLEAR, 1,
 174                         ABM1_BL_REG_READ_MISSED_FRAME_CLEAR, 1);
 175 }
 176
 177 static unsigned int dce_abm_get_current_backlight(struct abm *abm)
 178 {
 179         struct dce_abm *abm_dce = TO_DCE_ABM(abm);
 180         unsigned int backlight = REG_READ(BL1_PWM_CURRENT_ABM_LEVEL);
 181
 182         /* return backlight in hardware format which is unsigned 17 bits, with
 183          * 1 bit integer and 16 bit fractional
 184          */
 185         return backlight;
 186 }
 187
 188 static unsigned int dce_abm_get_target_backlight(struct abm *abm)
 189 {
 190         struct dce_abm *abm_dce = TO_DCE_ABM(abm);
 191         unsigned int backlight = REG_READ(BL1_PWM_TARGET_ABM_LEVEL);
 192
 193         /* return backlight in hardware format which is unsigned 17 bits, with
 194          * 1 bit integer and 16 bit fractional
 195          */
 196         return backlight;
 197 }
 198
 199 static bool dce_abm_set_level(struct abm *abm, uint32_t level)
 200 {
 201         struct dce_abm *abm_dce = TO_DCE_ABM(abm);
 202
 203         if (abm->dmcu_is_running == false)
 204                 return true;
 205
 206         REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
 207                         1, 80000);
 208
 209         /* setDMCUParam_ABMLevel */
 210         REG_UPDATE_2(MASTER_COMM_CMD_REG,
 211                         MASTER_COMM_CMD_REG_BYTE0, MCP_ABM_LEVEL_SET,
 212                         MASTER_COMM_CMD_REG_BYTE2, level);
 213
 214         /* notifyDMCUMsg */
 215         REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
 216
 217         return true;
 218 }
 219
 220 static bool dce_abm_immediate_disable(struct abm *abm, uint32_t panel_inst)
 221 {
 222         if (abm->dmcu_is_running == false)
 223                 return true;
 224
 225         dce_abm_set_pipe(abm, MCP_DISABLE_ABM_IMMEDIATELY, panel_inst);
 226
 227         return true;
 228 }
 229
 230 static bool dce_abm_set_backlight_level_pwm(
 231                 struct abm *abm,
 232                 unsigned int backlight_pwm_u16_16,
 233                 unsigned int frame_ramp,
 234                 unsigned int controller_id,
 235                 unsigned int panel_inst)
 236 {
 237         struct dce_abm *abm_dce = TO_DCE_ABM(abm);
 238
 239         DC_LOG_BACKLIGHT("New Backlight level: %d (0x%X)\n",
 240                         backlight_pwm_u16_16, backlight_pwm_u16_16);
 241
 242         dmcu_set_backlight_level(abm_dce,
 243                         backlight_pwm_u16_16,
 244                         frame_ramp,
 245                         controller_id,
 246                         panel_inst);
 247
 248         return true;
 249 }
 250
 251 static const struct abm_funcs dce_funcs = {
 252         .abm_init = dce_abm_init,
 253         .set_abm_level = dce_abm_set_level,
 254         .set_pipe = dce_abm_set_pipe,
 255         .set_backlight_level_pwm = dce_abm_set_backlight_level_pwm,
 256         .get_current_backlight = dce_abm_get_current_backlight,
 257         .get_target_backlight = dce_abm_get_target_backlight,
 258         .init_abm_config = NULL,
 259         .set_abm_immediate_disable = dce_abm_immediate_disable,
 260 };
 261
 262 static void dce_abm_construct(
 263         struct dce_abm *abm_dce,
 264         struct dc_context *ctx,
 265         const struct dce_abm_registers *regs,
 266         const struct dce_abm_shift *abm_shift,
 267         const struct dce_abm_mask *abm_mask)
 268 {
 269         struct abm *base = &abm_dce->base;
 270
 271         base->ctx = ctx;
 272         base->funcs = &dce_funcs;
 273         base->dmcu_is_running = false;
 274
 275         abm_dce->regs = regs;
 276         abm_dce->abm_shift = abm_shift;
 277         abm_dce->abm_mask = abm_mask;
 278 }
 279
 280 struct abm *dce_abm_create(
 281         struct dc_context *ctx,
 282         const struct dce_abm_registers *regs,
 283         const struct dce_abm_shift *abm_shift,
 284         const struct dce_abm_mask *abm_mask)
 285 {
 286         struct dce_abm *abm_dce = kzalloc(sizeof(*abm_dce), GFP_KERNEL);
 287
 288         if (abm_dce == NULL) {
 289                 BREAK_TO_DEBUGGER();
 290                 return NULL;
 291         }
 292
 293         dce_abm_construct(abm_dce, ctx, regs, abm_shift, abm_mask);
 294
 295         abm_dce->base.funcs = &dce_funcs;
 296
 297         return &abm_dce->base;
 298 }
 299
 300 void dce_abm_destroy(struct abm **abm)
 301 {
 302         struct dce_abm *abm_dce = TO_DCE_ABM(*abm);
 303
 304         kfree(abm_dce);
 305         *abm = NULL;
 306 }