drivers/gpu/drm/nouveau/nouveau_hdmi.c

   1 /*
   2  * Copyright 2011 Red Hat 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: Ben Skeggs
  23  */
  24
  25 #include "drmP.h"
  26 #include "nouveau_drv.h"
  27 #include "nouveau_connector.h"
  28 #include "nouveau_encoder.h"
  29 #include "nouveau_crtc.h"
  30
  31 static bool
  32 hdmi_sor(struct drm_encoder *encoder)
  33 {
  34         struct drm_nouveau_private *dev_priv = encoder->dev->dev_private;
  35         if (dev_priv->chipset < 0xa3)
  36                 return false;
  37         return true;
  38 }
  39
  40 static inline u32
  41 hdmi_base(struct drm_encoder *encoder)
  42 {
  43         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
  44         struct nouveau_crtc *nv_crtc = nouveau_crtc(nv_encoder->crtc);
  45         if (!hdmi_sor(encoder))
  46                 return 0x616500 + (nv_crtc->index * 0x800);
  47         return 0x61c500 + (nv_encoder->or * 0x800);
  48 }
  49
  50 static void
  51 hdmi_wr32(struct drm_encoder *encoder, u32 reg, u32 val)
  52 {
  53         nv_wr32(encoder->dev, hdmi_base(encoder) + reg, val);
  54 }
  55
  56 static u32
  57 hdmi_rd32(struct drm_encoder *encoder, u32 reg)
  58 {
  59         return nv_rd32(encoder->dev, hdmi_base(encoder) + reg);
  60 }
  61
  62 static u32
  63 hdmi_mask(struct drm_encoder *encoder, u32 reg, u32 mask, u32 val)
  64 {
  65         u32 tmp = hdmi_rd32(encoder, reg);
  66         hdmi_wr32(encoder, reg, (tmp & ~mask) | val);
  67         return tmp;
  68 }
  69
  70 static void
  71 nouveau_audio_disconnect(struct drm_encoder *encoder)
  72 {
  73         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
  74         struct drm_device *dev = encoder->dev;
  75         u32 or = nv_encoder->or * 0x800;
  76
  77         if (hdmi_sor(encoder)) {
  78                 nv_mask(dev, 0x61c448 + or, 0x00000003, 0x00000000);
  79         }
  80 }
  81
  82 static void
  83 nouveau_audio_mode_set(struct drm_encoder *encoder,
  84                        struct drm_display_mode *mode)
  85 {
  86         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
  87         struct nouveau_connector *nv_connector;
  88         struct drm_device *dev = encoder->dev;
  89         u32 or = nv_encoder->or * 0x800;
  90         int i;
  91
  92         nv_connector = nouveau_encoder_connector_get(nv_encoder);
  93         if (!drm_detect_monitor_audio(nv_connector->edid)) {
  94                 nouveau_audio_disconnect(encoder);
  95                 return;
  96         }
  97
  98         if (hdmi_sor(encoder)) {
  99                 nv_mask(dev, 0x61c448 + or, 0x00000001, 0x00000001);
 100
 101                 drm_edid_to_eld(&nv_connector->base, nv_connector->edid);
 102                 if (nv_connector->base.eld[0]) {
 103                         u8 *eld = nv_connector->base.eld;
 104                         for (i = 0; i < eld[2] * 4; i++)
 105                                 nv_wr32(dev, 0x61c440 + or, (i << 8) | eld[i]);
 106                         for (i = eld[2] * 4; i < 0x60; i++)
 107                                 nv_wr32(dev, 0x61c440 + or, (i << 8) | 0x00);
 108                         nv_mask(dev, 0x61c448 + or, 0x00000002, 0x00000002);
 109                 }
 110         }
 111 }
 112
 113 static void
 114 nouveau_hdmi_infoframe(struct drm_encoder *encoder, u32 ctrl, u8 *frame)
 115 {
 116         /* calculate checksum for the infoframe */
 117         u8 sum = 0, i;
 118         for (i = 0; i < frame[2]; i++)
 119                 sum += frame[i];
 120         frame[3] = 256 - sum;
 121
 122         /* disable infoframe, and write header */
 123         hdmi_mask(encoder, ctrl + 0x00, 0x00000001, 0x00000000);
 124         hdmi_wr32(encoder, ctrl + 0x08, *(u32 *)frame & 0xffffff);
 125
 126         /* register scans tell me the audio infoframe has only one set of
 127          * subpack regs, according to tegra (gee nvidia, it'd be nice if we
 128          * could get those docs too!), the hdmi block pads out the rest of
 129          * the packet on its own.
 130          */
 131         if (ctrl == 0x020)
 132                 frame[2] = 6;
 133
 134         /* write out checksum and data, weird weird 7 byte register pairs */
 135         for (i = 0; i < frame[2] + 1; i += 7) {
 136                 u32 rsubpack = ctrl + 0x0c + ((i / 7) * 8);
 137                 u32 *subpack = (u32 *)&frame[3 + i];
 138                 hdmi_wr32(encoder, rsubpack + 0, subpack[0]);
 139                 hdmi_wr32(encoder, rsubpack + 4, subpack[1] & 0xffffff);
 140         }
 141
 142         /* enable the infoframe */
 143         hdmi_mask(encoder, ctrl, 0x00000001, 0x00000001);
 144 }
 145
 146 static void
 147 nouveau_hdmi_video_infoframe(struct drm_encoder *encoder,
 148                              struct drm_display_mode *mode)
 149 {
 150         const u8 Y = 0, A = 0, B = 0, S = 0, C = 0, M = 0, R = 0;
 151         const u8 ITC = 0, EC = 0, Q = 0, SC = 0, VIC = 0, PR = 0;
 152         const u8 bar_top = 0, bar_bottom = 0, bar_left = 0, bar_right = 0;
 153         u8 frame[20];
 154
 155         frame[0x00] = 0x82; /* AVI infoframe */
 156         frame[0x01] = 0x02; /* version */
 157         frame[0x02] = 0x0d; /* length */
 158         frame[0x03] = 0x00;
 159         frame[0x04] = (Y << 5) | (A << 4) | (B << 2) | S;
 160         frame[0x05] = (C << 6) | (M << 4) | R;
 161         frame[0x06] = (ITC << 7) | (EC << 4) | (Q << 2) | SC;
 162         frame[0x07] = VIC;
 163         frame[0x08] = PR;
 164         frame[0x09] = bar_top & 0xff;
 165         frame[0x0a] = bar_top >> 8;
 166         frame[0x0b] = bar_bottom & 0xff;
 167         frame[0x0c] = bar_bottom >> 8;
 168         frame[0x0d] = bar_left & 0xff;
 169         frame[0x0e] = bar_left >> 8;
 170         frame[0x0f] = bar_right & 0xff;
 171         frame[0x10] = bar_right >> 8;
 172         frame[0x11] = 0x00;
 173         frame[0x12] = 0x00;
 174         frame[0x13] = 0x00;
 175
 176         nouveau_hdmi_infoframe(encoder, 0x020, frame);
 177 }
 178
 179 static void
 180 nouveau_hdmi_audio_infoframe(struct drm_encoder *encoder,
 181                              struct drm_display_mode *mode)
 182 {
 183         const u8 CT = 0x00, CC = 0x01, ceaSS = 0x00, SF = 0x00, FMT = 0x00;
 184         const u8 CA = 0x00, DM_INH = 0, LSV = 0x00;
 185         u8 frame[12];
 186
 187         frame[0x00] = 0x84;     /* Audio infoframe */
 188         frame[0x01] = 0x01;     /* version */
 189         frame[0x02] = 0x0a;     /* length */
 190         frame[0x03] = 0x00;
 191         frame[0x04] = (CT << 4) | CC;
 192         frame[0x05] = (SF << 2) | ceaSS;
 193         frame[0x06] = FMT;
 194         frame[0x07] = CA;
 195         frame[0x08] = (DM_INH << 7) | (LSV << 3);
 196         frame[0x09] = 0x00;
 197         frame[0x0a] = 0x00;
 198         frame[0x0b] = 0x00;
 199
 200         nouveau_hdmi_infoframe(encoder, 0x000, frame);
 201 }
 202
 203 static void
 204 nouveau_hdmi_disconnect(struct drm_encoder *encoder)
 205 {
 206         nouveau_audio_disconnect(encoder);
 207
 208         /* disable audio and avi infoframes */
 209         hdmi_mask(encoder, 0x000, 0x00000001, 0x00000000);
 210         hdmi_mask(encoder, 0x020, 0x00000001, 0x00000000);
 211
 212         /* disable hdmi */
 213         hdmi_mask(encoder, 0x0a4, 0x40000000, 0x00000000);
 214 }
 215
 216 void
 217 nouveau_hdmi_mode_set(struct drm_encoder *encoder,
 218                       struct drm_display_mode *mode)
 219 {
 220         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 221         struct nouveau_connector *nv_connector;
 222         struct drm_device *dev = encoder->dev;
 223         u32 max_ac_packet, rekey;
 224
 225         nv_connector = nouveau_encoder_connector_get(nv_encoder);
 226         if (!mode || !nv_connector || !nv_connector->edid ||
 227             !drm_detect_hdmi_monitor(nv_connector->edid)) {
 228                 nouveau_hdmi_disconnect(encoder);
 229                 return;
 230         }
 231
 232         nouveau_hdmi_video_infoframe(encoder, mode);
 233         nouveau_hdmi_audio_infoframe(encoder, mode);
 234
 235         hdmi_mask(encoder, 0x0d0, 0x00070001, 0x00010001); /* SPARE, HW_CTS */
 236         hdmi_mask(encoder, 0x068, 0x00010101, 0x00000000); /* ACR_CTRL, ?? */
 237         hdmi_mask(encoder, 0x078, 0x80000000, 0x80000000); /* ACR_0441_ENABLE */
 238
 239         nv_mask(dev, 0x61733c, 0x00100000, 0x00100000); /* RESETF */
 240         nv_mask(dev, 0x61733c, 0x10000000, 0x10000000); /* LOOKUP_EN */
 241         nv_mask(dev, 0x61733c, 0x00100000, 0x00000000); /* !RESETF */
 242
 243         /* value matches nvidia binary driver, and tegra constant */
 244         rekey = 56;
 245
 246         max_ac_packet  = mode->htotal - mode->hdisplay;
 247         max_ac_packet -= rekey;
 248         max_ac_packet -= 18; /* constant from tegra */
 249         max_ac_packet /= 32;
 250
 251         /* enable hdmi */
 252         hdmi_mask(encoder, 0x0a4, 0x5f1f003f, 0x40000000 | /* enable */
 253                                               0x1f000000 | /* unknown */
 254                                               max_ac_packet << 16 |
 255                                               rekey);
 256
 257         nouveau_audio_mode_set(encoder, mode);
 258 }