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 #include <drm/drm_vblank.h> 11 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 int mgag200_g200eh3_pipeline_init(struct mga_device *mdev) 91 { 92 struct drm_device *dev = &mdev->base; 93 struct drm_plane *primary_plane = &mdev->primary_plane; 94 struct drm_crtc *crtc = &mdev->crtc; 95 int ret; 96 97 ret = drm_universal_plane_init(dev, primary_plane, 0, 98 &mgag200_g200eh3_primary_plane_funcs, 99 mgag200_primary_plane_formats, 100 mgag200_primary_plane_formats_size, 101 mgag200_primary_plane_fmtmods, 102 DRM_PLANE_TYPE_PRIMARY, NULL); 103 if (ret) { 104 drm_err(dev, "drm_universal_plane_init() failed: %d\n", ret); 105 return ret; 106 } 107 drm_plane_helper_add(primary_plane, &mgag200_g200eh3_primary_plane_helper_funcs); 108 drm_plane_enable_fb_damage_clips(primary_plane); 109 110 ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL, 111 &mgag200_g200eh3_crtc_funcs, NULL); 112 if (ret) { 113 drm_err(dev, "drm_crtc_init_with_planes() failed: %d\n", ret); 114 return ret; 115 } 116 drm_crtc_helper_add(crtc, &mgag200_g200eh3_crtc_helper_funcs); 117 118 /* FIXME: legacy gamma tables, but atomic gamma doesn't work without */ 119 drm_mode_crtc_set_gamma_size(crtc, MGAG200_LUT_SIZE); 120 drm_crtc_enable_color_mgmt(crtc, 0, false, MGAG200_LUT_SIZE); 121 122 ret = mgag200_vga_bmc_output_init(mdev); 123 if (ret) 124 return ret; 125 126 return 0; 127 } 128 129 /* 130 * DRM device 131 */ 132 133 static const struct mgag200_device_info mgag200_g200eh3_device_info = 134 MGAG200_DEVICE_INFO_INIT(2048, 2048, 0, false, 1, 0, false); 135 136 static const struct mgag200_device_funcs mgag200_g200eh3_device_funcs = { 137 .pixpllc_atomic_check = mgag200_g200eh3_pixpllc_atomic_check, 138 .pixpllc_atomic_update = mgag200_g200eh_pixpllc_atomic_update, // same as G200EH 139 }; 140 141 struct mga_device *mgag200_g200eh3_device_create(struct pci_dev *pdev, 142 const struct drm_driver *drv) 143 { 144 struct mga_device *mdev; 145 struct drm_device *dev; 146 resource_size_t vram_available; 147 int ret; 148 149 mdev = devm_drm_dev_alloc(&pdev->dev, drv, struct mga_device, base); 150 if (IS_ERR(mdev)) 151 return mdev; 152 dev = &mdev->base; 153 154 pci_set_drvdata(pdev, dev); 155 156 ret = mgag200_init_pci_options(pdev, 0x00000120, 0x0000b000); 157 if (ret) 158 return ERR_PTR(ret); 159 160 ret = mgag200_device_preinit(mdev); 161 if (ret) 162 return ERR_PTR(ret); 163 164 ret = mgag200_device_init(mdev, &mgag200_g200eh3_device_info, 165 &mgag200_g200eh3_device_funcs); 166 if (ret) 167 return ERR_PTR(ret); 168 169 mgag200_g200eh_init_registers(mdev); // same as G200EH 170 171 vram_available = mgag200_device_probe_vram(mdev); 172 173 ret = mgag200_mode_config_init(mdev, vram_available); 174 if (ret) 175 return ERR_PTR(ret); 176 177 ret = mgag200_g200eh3_pipeline_init(mdev); 178 if (ret) 179 return ERR_PTR(ret); 180 181 drm_mode_config_reset(dev); 182 drm_kms_helper_poll_init(dev); 183 184 ret = drm_vblank_init(dev, 1); 185 if (ret) 186 return ERR_PTR(ret); 187 188 return mdev; 189 } 190