drivers/gpu/drm/gma500/psb_device.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /**************************************************************************
   3  * Copyright (c) 2011, Intel Corporation.
   4  * All Rights Reserved.
   5  *
   6  **************************************************************************/
   7
   8 #include <drm/drm.h>
   9 #include <drm/drm_crtc_helper.h>
  10
  11 #include "gma_device.h"
  12 #include "intel_bios.h"
  13 #include "psb_device.h"
  14 #include "psb_drv.h"
  15 #include "psb_intel_reg.h"
  16 #include "psb_reg.h"
  17
  18 static int psb_output_init(struct drm_device *dev)
  19 {
  20         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
  21         psb_intel_lvds_init(dev, &dev_priv->mode_dev);
  22         psb_intel_sdvo_init(dev, SDVOB);
  23         return 0;
  24 }
  25
  26 /*
  27  *      Poulsbo Backlight Interfaces
  28  */
  29
  30 #define BLC_PWM_PRECISION_FACTOR 100    /* 10000000 */
  31 #define BLC_PWM_FREQ_CALC_CONSTANT 32
  32 #define MHz 1000000
  33
  34 #define PSB_BLC_PWM_PRECISION_FACTOR    10
  35 #define PSB_BLC_MAX_PWM_REG_FREQ        0xFFFE
  36 #define PSB_BLC_MIN_PWM_REG_FREQ        0x2
  37
  38 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
  39 #define PSB_BACKLIGHT_PWM_CTL_SHIFT     (16)
  40
  41 static int psb_backlight_setup(struct drm_device *dev)
  42 {
  43         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
  44         unsigned long core_clock;
  45         /* u32 bl_max_freq; */
  46         /* unsigned long value; */
  47         u16 bl_max_freq;
  48         uint32_t value;
  49         uint32_t blc_pwm_precision_factor;
  50
  51         /* get bl_max_freq and pol from dev_priv*/
  52         if (!dev_priv->lvds_bl) {
  53                 dev_err(dev->dev, "Has no valid LVDS backlight info\n");
  54                 return -ENOENT;
  55         }
  56         bl_max_freq = dev_priv->lvds_bl->freq;
  57         blc_pwm_precision_factor = PSB_BLC_PWM_PRECISION_FACTOR;
  58
  59         core_clock = dev_priv->core_freq;
  60
  61         value = (core_clock * MHz) / BLC_PWM_FREQ_CALC_CONSTANT;
  62         value *= blc_pwm_precision_factor;
  63         value /= bl_max_freq;
  64         value /= blc_pwm_precision_factor;
  65
  66         if (value > (unsigned long long)PSB_BLC_MAX_PWM_REG_FREQ ||
  67                  value < (unsigned long long)PSB_BLC_MIN_PWM_REG_FREQ)
  68                                 return -ERANGE;
  69         else {
  70                 value &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
  71                 REG_WRITE(BLC_PWM_CTL,
  72                         (value << PSB_BACKLIGHT_PWM_CTL_SHIFT) | (value));
  73         }
  74
  75         psb_intel_lvds_set_brightness(dev, PSB_MAX_BRIGHTNESS);
  76
  77         return 0;
  78 }
  79
  80 /*
  81  *      Provide the Poulsbo specific chip logic and low level methods
  82  *      for power management
  83  */
  84
  85 static void psb_init_pm(struct drm_device *dev)
  86 {
  87         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
  88
  89         u32 gating = PSB_RSGX32(PSB_CR_CLKGATECTL);
  90         gating &= ~3;   /* Disable 2D clock gating */
  91         gating |= 1;
  92         PSB_WSGX32(gating, PSB_CR_CLKGATECTL);
  93         PSB_RSGX32(PSB_CR_CLKGATECTL);
  94 }
  95
  96 /**
  97  *      psb_save_display_registers      -       save registers lost on suspend
  98  *      @dev: our DRM device
  99  *
 100  *      Save the state we need in order to be able to restore the interface
 101  *      upon resume from suspend
 102  */
 103 static int psb_save_display_registers(struct drm_device *dev)
 104 {
 105         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 106         struct gma_connector *gma_connector;
 107         struct drm_crtc *crtc;
 108         struct drm_connector_list_iter conn_iter;
 109         struct drm_connector *connector;
 110         struct psb_state *regs = &dev_priv->regs.psb;
 111
 112         /* Display arbitration control + watermarks */
 113         regs->saveDSPARB = PSB_RVDC32(DSPARB);
 114         regs->saveDSPFW1 = PSB_RVDC32(DSPFW1);
 115         regs->saveDSPFW2 = PSB_RVDC32(DSPFW2);
 116         regs->saveDSPFW3 = PSB_RVDC32(DSPFW3);
 117         regs->saveDSPFW4 = PSB_RVDC32(DSPFW4);
 118         regs->saveDSPFW5 = PSB_RVDC32(DSPFW5);
 119         regs->saveDSPFW6 = PSB_RVDC32(DSPFW6);
 120         regs->saveCHICKENBIT = PSB_RVDC32(DSPCHICKENBIT);
 121
 122         /* Save crtc and output state */
 123         drm_modeset_lock_all(dev);
 124         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 125                 if (drm_helper_crtc_in_use(crtc))
 126                         dev_priv->ops->save_crtc(crtc);
 127         }
 128
 129         drm_connector_list_iter_begin(dev, &conn_iter);
 130         drm_for_each_connector_iter(connector, &conn_iter) {
 131                 gma_connector = to_gma_connector(connector);
 132                 if (gma_connector->save)
 133                         gma_connector->save(connector);
 134         }
 135         drm_connector_list_iter_end(&conn_iter);
 136
 137         drm_modeset_unlock_all(dev);
 138         return 0;
 139 }
 140
 141 /**
 142  *      psb_restore_display_registers   -       restore lost register state
 143  *      @dev: our DRM device
 144  *
 145  *      Restore register state that was lost during suspend and resume.
 146  */
 147 static int psb_restore_display_registers(struct drm_device *dev)
 148 {
 149         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 150         struct gma_connector *gma_connector;
 151         struct drm_crtc *crtc;
 152         struct drm_connector_list_iter conn_iter;
 153         struct drm_connector *connector;
 154         struct psb_state *regs = &dev_priv->regs.psb;
 155
 156         /* Display arbitration + watermarks */
 157         PSB_WVDC32(regs->saveDSPARB, DSPARB);
 158         PSB_WVDC32(regs->saveDSPFW1, DSPFW1);
 159         PSB_WVDC32(regs->saveDSPFW2, DSPFW2);
 160         PSB_WVDC32(regs->saveDSPFW3, DSPFW3);
 161         PSB_WVDC32(regs->saveDSPFW4, DSPFW4);
 162         PSB_WVDC32(regs->saveDSPFW5, DSPFW5);
 163         PSB_WVDC32(regs->saveDSPFW6, DSPFW6);
 164         PSB_WVDC32(regs->saveCHICKENBIT, DSPCHICKENBIT);
 165
 166         /*make sure VGA plane is off. it initializes to on after reset!*/
 167         PSB_WVDC32(0x80000000, VGACNTRL);
 168
 169         drm_modeset_lock_all(dev);
 170         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 171                 if (drm_helper_crtc_in_use(crtc))
 172                         dev_priv->ops->restore_crtc(crtc);
 173
 174         drm_connector_list_iter_begin(dev, &conn_iter);
 175         drm_for_each_connector_iter(connector, &conn_iter) {
 176                 gma_connector = to_gma_connector(connector);
 177                 if (gma_connector->restore)
 178                         gma_connector->restore(connector);
 179         }
 180         drm_connector_list_iter_end(&conn_iter);
 181
 182         drm_modeset_unlock_all(dev);
 183         return 0;
 184 }
 185
 186 static int psb_power_down(struct drm_device *dev)
 187 {
 188         return 0;
 189 }
 190
 191 static int psb_power_up(struct drm_device *dev)
 192 {
 193         return 0;
 194 }
 195
 196 /* Poulsbo */
 197 static const struct psb_offset psb_regmap[2] = {
 198         {
 199                 .fp0 = FPA0,
 200                 .fp1 = FPA1,
 201                 .cntr = DSPACNTR,
 202                 .conf = PIPEACONF,
 203                 .src = PIPEASRC,
 204                 .dpll = DPLL_A,
 205                 .htotal = HTOTAL_A,
 206                 .hblank = HBLANK_A,
 207                 .hsync = HSYNC_A,
 208                 .vtotal = VTOTAL_A,
 209                 .vblank = VBLANK_A,
 210                 .vsync = VSYNC_A,
 211                 .stride = DSPASTRIDE,
 212                 .size = DSPASIZE,
 213                 .pos = DSPAPOS,
 214                 .base = DSPABASE,
 215                 .surf = DSPASURF,
 216                 .addr = DSPABASE,
 217                 .status = PIPEASTAT,
 218                 .linoff = DSPALINOFF,
 219                 .tileoff = DSPATILEOFF,
 220                 .palette = PALETTE_A,
 221         },
 222         {
 223                 .fp0 = FPB0,
 224                 .fp1 = FPB1,
 225                 .cntr = DSPBCNTR,
 226                 .conf = PIPEBCONF,
 227                 .src = PIPEBSRC,
 228                 .dpll = DPLL_B,
 229                 .htotal = HTOTAL_B,
 230                 .hblank = HBLANK_B,
 231                 .hsync = HSYNC_B,
 232                 .vtotal = VTOTAL_B,
 233                 .vblank = VBLANK_B,
 234                 .vsync = VSYNC_B,
 235                 .stride = DSPBSTRIDE,
 236                 .size = DSPBSIZE,
 237                 .pos = DSPBPOS,
 238                 .base = DSPBBASE,
 239                 .surf = DSPBSURF,
 240                 .addr = DSPBBASE,
 241                 .status = PIPEBSTAT,
 242                 .linoff = DSPBLINOFF,
 243                 .tileoff = DSPBTILEOFF,
 244                 .palette = PALETTE_B,
 245         }
 246 };
 247
 248 static int psb_chip_setup(struct drm_device *dev)
 249 {
 250         struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
 251         dev_priv->regmap = psb_regmap;
 252         gma_get_core_freq(dev);
 253         gma_intel_setup_gmbus(dev);
 254         psb_intel_opregion_init(dev);
 255         psb_intel_init_bios(dev);
 256         return 0;
 257 }
 258
 259 static void psb_chip_teardown(struct drm_device *dev)
 260 {
 261         gma_intel_teardown_gmbus(dev);
 262 }
 263
 264 const struct psb_ops psb_chip_ops = {
 265         .name = "Poulsbo",
 266         .pipes = 2,
 267         .crtcs = 2,
 268         .hdmi_mask = (1 << 0),
 269         .lvds_mask = (1 << 1),
 270         .sdvo_mask = (1 << 0),
 271         .cursor_needs_phys = 1,
 272         .sgx_offset = PSB_SGX_OFFSET,
 273         .chip_setup = psb_chip_setup,
 274         .chip_teardown = psb_chip_teardown,
 275
 276         .crtc_helper = &psb_intel_helper_funcs,
 277         .clock_funcs = &psb_clock_funcs,
 278
 279         .output_init = psb_output_init,
 280
 281         .backlight_init = psb_backlight_setup,
 282         .backlight_set = psb_intel_lvds_set_brightness,
 283         .backlight_name = "psb-bl",
 284
 285         .init_pm = psb_init_pm,
 286         .save_regs = psb_save_display_registers,
 287         .restore_regs = psb_restore_display_registers,
 288         .save_crtc = gma_crtc_save,
 289         .restore_crtc = gma_crtc_restore,
 290         .power_down = psb_power_down,
 291         .power_up = psb_power_up,
 292 };
 293