1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include <linux/pci.h> 4 5 #include <drm/drm_atomic.h> 6 #include <drm/drm_atomic_helper.h> 7 #include <drm/drm_drv.h> 8 #include <drm/drm_gem_atomic_helper.h> 9 #include <drm/drm_probe_helper.h> 10 11 #include "mgag200_ddc.h" 12 #include "mgag200_drv.h" 13 14 /* 15 * PIXPLLC 16 */ 17 18 static int mgag200_g200eh3_pixpllc_atomic_check(struct drm_crtc *crtc, 19 struct drm_atomic_state *new_state) 20 { 21 static const unsigned int vcomax = 3000000; 22 static const unsigned int vcomin = 1500000; 23 static const unsigned int pllreffreq = 25000; 24 25 struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc); 26 struct mgag200_crtc_state *new_mgag200_crtc_state = to_mgag200_crtc_state(new_crtc_state); 27 long clock = new_crtc_state->mode.clock; 28 struct mgag200_pll_values *pixpllc = &new_mgag200_crtc_state->pixpllc; 29 unsigned int delta, tmpdelta; 30 unsigned int testp, testm, testn; 31 unsigned int p, m, n, s; 32 unsigned int computed; 33 34 m = n = p = s = 0; 35 delta = 0xffffffff; 36 testp = 0; 37 38 for (testm = 150; testm >= 6; testm--) { 39 if (clock * testm > vcomax) 40 continue; 41 if (clock * testm < vcomin) 42 continue; 43 for (testn = 120; testn >= 60; testn--) { 44 computed = (pllreffreq * testn) / testm; 45 if (computed > clock) 46 tmpdelta = computed - clock; 47 else 48 tmpdelta = clock - computed; 49 if (tmpdelta < delta) { 50 delta = tmpdelta; 51 n = testn + 1; 52 m = testm + 1; 53 p = testp + 1; 54 } 55 if (delta == 0) 56 break; 57 } 58 if (delta == 0) 59 break; 60 } 61 62 pixpllc->m = m; 63 pixpllc->n = n; 64 pixpllc->p = p; 65 pixpllc->s = s; 66 67 return 0; 68 } 69 70 /* 71 * Mode-setting pipeline 72 */ 73 74 static const struct drm_plane_helper_funcs mgag200_g200eh3_primary_plane_helper_funcs = { 75 MGAG200_PRIMARY_PLANE_HELPER_FUNCS, 76 }; 77 78 static const struct drm_plane_funcs mgag200_g200eh3_primary_plane_funcs = { 79 MGAG200_PRIMARY_PLANE_FUNCS, 80 }; 81 82 static const struct drm_crtc_helper_funcs mgag200_g200eh3_crtc_helper_funcs = { 83 MGAG200_CRTC_HELPER_FUNCS, 84 }; 85 86 static const struct drm_crtc_funcs mgag200_g200eh3_crtc_funcs = { 87 MGAG200_CRTC_FUNCS, 88 }; 89 90 static const struct drm_encoder_funcs mgag200_g200eh3_dac_encoder_funcs = { 91 MGAG200_DAC_ENCODER_FUNCS, 92 }; 93 94 static const struct drm_connector_helper_funcs mgag200_g200eh3_vga_connector_helper_funcs = { 95 MGAG200_VGA_CONNECTOR_HELPER_FUNCS, 96 }; 97 98 static const struct drm_connector_funcs mgag200_g200eh3_vga_connector_funcs = { 99 MGAG200_VGA_CONNECTOR_FUNCS, 100 }; 101 102 static int mgag200_g200eh3_pipeline_init(struct mga_device *mdev) 103 { 104 struct drm_device *dev = &mdev->base; 105 struct drm_plane *primary_plane = &mdev->primary_plane; 106 struct drm_crtc *crtc = &mdev->crtc; 107 struct drm_encoder *encoder = &mdev->encoder; 108 struct drm_connector *connector = &mdev->connector; 109 struct i2c_adapter *ddc; 110 int ret; 111 112 ret = drm_universal_plane_init(dev, primary_plane, 0, 113 &mgag200_g200eh3_primary_plane_funcs, 114 mgag200_primary_plane_formats, 115 mgag200_primary_plane_formats_size, 116 mgag200_primary_plane_fmtmods, 117 DRM_PLANE_TYPE_PRIMARY, NULL); 118 if (ret) { 119 drm_err(dev, "drm_universal_plane_init() failed: %d\n", ret); 120 return ret; 121 } 122 drm_plane_helper_add(primary_plane, &mgag200_g200eh3_primary_plane_helper_funcs); 123 drm_plane_enable_fb_damage_clips(primary_plane); 124 125 ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL, 126 &mgag200_g200eh3_crtc_funcs, NULL); 127 if (ret) { 128 drm_err(dev, "drm_crtc_init_with_planes() failed: %d\n", ret); 129 return ret; 130 } 131 drm_crtc_helper_add(crtc, &mgag200_g200eh3_crtc_helper_funcs); 132 133 /* FIXME: legacy gamma tables, but atomic gamma doesn't work without */ 134 drm_mode_crtc_set_gamma_size(crtc, MGAG200_LUT_SIZE); 135 drm_crtc_enable_color_mgmt(crtc, 0, false, MGAG200_LUT_SIZE); 136 137 encoder->possible_crtcs = drm_crtc_mask(crtc); 138 ret = drm_encoder_init(dev, encoder, &mgag200_g200eh3_dac_encoder_funcs, 139 DRM_MODE_ENCODER_DAC, NULL); 140 if (ret) { 141 drm_err(dev, "drm_encoder_init() failed: %d\n", ret); 142 return ret; 143 } 144 145 ddc = mgag200_ddc_create(mdev); 146 if (IS_ERR(ddc)) { 147 ret = PTR_ERR(ddc); 148 drm_err(dev, "failed to add DDC bus: %d\n", ret); 149 return ret; 150 } 151 152 ret = drm_connector_init_with_ddc(dev, connector, 153 &mgag200_g200eh3_vga_connector_funcs, 154 DRM_MODE_CONNECTOR_VGA, ddc); 155 if (ret) { 156 drm_err(dev, "drm_connector_init_with_ddc() failed: %d\n", ret); 157 return ret; 158 } 159 drm_connector_helper_add(connector, &mgag200_g200eh3_vga_connector_helper_funcs); 160 161 ret = drm_connector_attach_encoder(connector, encoder); 162 if (ret) { 163 drm_err(dev, "drm_connector_attach_encoder() failed: %d\n", ret); 164 return ret; 165 } 166 167 return 0; 168 } 169 170 /* 171 * DRM device 172 */ 173 174 static const struct mgag200_device_info mgag200_g200eh3_device_info = 175 MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 0, false); 176 177 static const struct mgag200_device_funcs mgag200_g200eh3_device_funcs = { 178 .pixpllc_atomic_check = mgag200_g200eh3_pixpllc_atomic_check, 179 .pixpllc_atomic_update = mgag200_g200eh_pixpllc_atomic_update, // same as G200EH 180 }; 181 182 struct mga_device *mgag200_g200eh3_device_create(struct pci_dev *pdev, 183 const struct drm_driver *drv) 184 { 185 struct mga_device *mdev; 186 struct drm_device *dev; 187 resource_size_t vram_available; 188 int ret; 189 190 mdev = devm_drm_dev_alloc(&pdev->dev, drv, struct mga_device, base); 191 if (IS_ERR(mdev)) 192 return mdev; 193 dev = &mdev->base; 194 195 pci_set_drvdata(pdev, dev); 196 197 ret = mgag200_init_pci_options(pdev, 0x00000120, 0x0000b000); 198 if (ret) 199 return ERR_PTR(ret); 200 201 ret = mgag200_device_preinit(mdev); 202 if (ret) 203 return ERR_PTR(ret); 204 205 ret = mgag200_device_init(mdev, &mgag200_g200eh3_device_info, 206 &mgag200_g200eh3_device_funcs); 207 if (ret) 208 return ERR_PTR(ret); 209 210 mgag200_g200eh_init_registers(mdev); // same as G200EH 211 212 vram_available = mgag200_device_probe_vram(mdev); 213 214 ret = mgag200_mode_config_init(mdev, vram_available); 215 if (ret) 216 return ERR_PTR(ret); 217 218 ret = mgag200_g200eh3_pipeline_init(mdev); 219 if (ret) 220 return ERR_PTR(ret); 221 222 drm_mode_config_reset(dev); 223 224 return mdev; 225 } 226