1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/ 4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> 5 */ 6 7 #include <drm/drm_atomic.h> 8 #include <drm/drm_atomic_helper.h> 9 #include <drm/drm_blend.h> 10 #include <drm/drm_crtc.h> 11 #include <drm/drm_fb_dma_helper.h> 12 #include <drm/drm_fourcc.h> 13 #include <drm/drm_framebuffer.h> 14 #include <drm/drm_gem_atomic_helper.h> 15 16 #include "tidss_crtc.h" 17 #include "tidss_dispc.h" 18 #include "tidss_drv.h" 19 #include "tidss_plane.h" 20 21 void tidss_plane_error_irq(struct drm_plane *plane, u64 irqstatus) 22 { 23 struct tidss_plane *tplane = to_tidss_plane(plane); 24 25 dev_err_ratelimited(plane->dev->dev, "Plane%u underflow (irq %llx)\n", 26 tplane->hw_plane_id, irqstatus); 27 } 28 29 /* drm_plane_helper_funcs */ 30 31 static int tidss_plane_atomic_check(struct drm_plane *plane, 32 struct drm_atomic_state *state) 33 { 34 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 35 plane); 36 struct drm_device *ddev = plane->dev; 37 struct tidss_device *tidss = to_tidss(ddev); 38 struct tidss_plane *tplane = to_tidss_plane(plane); 39 const struct drm_format_info *finfo; 40 struct drm_crtc_state *crtc_state; 41 u32 hw_plane = tplane->hw_plane_id; 42 u32 hw_videoport; 43 int ret; 44 45 if (!new_plane_state->crtc) { 46 /* 47 * The visible field is not reset by the DRM core but only 48 * updated by drm_atomic_helper_check_plane_state(), set it 49 * manually. 50 */ 51 new_plane_state->visible = false; 52 return 0; 53 } 54 55 crtc_state = drm_atomic_get_crtc_state(state, 56 new_plane_state->crtc); 57 if (IS_ERR(crtc_state)) 58 return PTR_ERR(crtc_state); 59 60 ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state, 61 0, 62 INT_MAX, true, true); 63 if (ret < 0) 64 return ret; 65 66 /* 67 * The HW is only able to start drawing at subpixel boundary 68 * (the two first checks below). At the end of a row the HW 69 * can only jump integer number of subpixels forward to the 70 * beginning of the next row. So we can only show picture with 71 * integer subpixel width (the third check). However, after 72 * reaching the end of the drawn picture the drawing starts 73 * again at the absolute memory address where top left corner 74 * position of the drawn picture is (so there is no need to 75 * check for odd height). 76 */ 77 78 finfo = drm_format_info(new_plane_state->fb->format->format); 79 80 if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) { 81 dev_dbg(ddev->dev, 82 "%s: x-position %u not divisible subpixel size %u\n", 83 __func__, (new_plane_state->src_x >> 16), finfo->hsub); 84 return -EINVAL; 85 } 86 87 if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) { 88 dev_dbg(ddev->dev, 89 "%s: y-position %u not divisible subpixel size %u\n", 90 __func__, (new_plane_state->src_y >> 16), finfo->vsub); 91 return -EINVAL; 92 } 93 94 if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) { 95 dev_dbg(ddev->dev, 96 "%s: src width %u not divisible by subpixel size %u\n", 97 __func__, (new_plane_state->src_w >> 16), 98 finfo->hsub); 99 return -EINVAL; 100 } 101 102 if (!new_plane_state->visible) 103 return 0; 104 105 hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport; 106 107 ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state, 108 hw_videoport); 109 if (ret) 110 return ret; 111 112 return 0; 113 } 114 115 static void tidss_plane_atomic_update(struct drm_plane *plane, 116 struct drm_atomic_state *state) 117 { 118 struct drm_device *ddev = plane->dev; 119 struct tidss_device *tidss = to_tidss(ddev); 120 struct tidss_plane *tplane = to_tidss_plane(plane); 121 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 122 plane); 123 u32 hw_videoport; 124 125 if (!new_state->visible) { 126 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false); 127 return; 128 } 129 130 hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport; 131 132 dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport); 133 } 134 135 static void tidss_plane_atomic_enable(struct drm_plane *plane, 136 struct drm_atomic_state *state) 137 { 138 struct drm_device *ddev = plane->dev; 139 struct tidss_device *tidss = to_tidss(ddev); 140 struct tidss_plane *tplane = to_tidss_plane(plane); 141 142 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true); 143 } 144 145 static void tidss_plane_atomic_disable(struct drm_plane *plane, 146 struct drm_atomic_state *state) 147 { 148 struct drm_device *ddev = plane->dev; 149 struct tidss_device *tidss = to_tidss(ddev); 150 struct tidss_plane *tplane = to_tidss_plane(plane); 151 152 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false); 153 } 154 155 static void drm_plane_destroy(struct drm_plane *plane) 156 { 157 struct tidss_plane *tplane = to_tidss_plane(plane); 158 159 drm_plane_cleanup(plane); 160 kfree(tplane); 161 } 162 163 static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = { 164 .atomic_check = tidss_plane_atomic_check, 165 .atomic_update = tidss_plane_atomic_update, 166 .atomic_enable = tidss_plane_atomic_enable, 167 .atomic_disable = tidss_plane_atomic_disable, 168 }; 169 170 static const struct drm_plane_helper_funcs tidss_primary_plane_helper_funcs = { 171 .atomic_check = tidss_plane_atomic_check, 172 .atomic_update = tidss_plane_atomic_update, 173 .atomic_enable = tidss_plane_atomic_enable, 174 .atomic_disable = tidss_plane_atomic_disable, 175 .get_scanout_buffer = drm_fb_dma_get_scanout_buffer, 176 }; 177 178 static const struct drm_plane_funcs tidss_plane_funcs = { 179 .update_plane = drm_atomic_helper_update_plane, 180 .disable_plane = drm_atomic_helper_disable_plane, 181 .reset = drm_atomic_helper_plane_reset, 182 .destroy = drm_plane_destroy, 183 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 184 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 185 }; 186 187 struct tidss_plane *tidss_plane_create(struct tidss_device *tidss, 188 u32 hw_plane_id, u32 plane_type, 189 u32 crtc_mask, const u32 *formats, 190 u32 num_formats) 191 { 192 struct tidss_plane *tplane; 193 enum drm_plane_type type; 194 u32 possible_crtcs; 195 u32 num_planes = tidss->feat->num_vids; 196 u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) | 197 BIT(DRM_COLOR_YCBCR_BT709)); 198 u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) | 199 BIT(DRM_COLOR_YCBCR_LIMITED_RANGE)); 200 u32 default_encoding = DRM_COLOR_YCBCR_BT601; 201 u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE; 202 u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) | 203 BIT(DRM_MODE_BLEND_COVERAGE)); 204 int ret; 205 206 tplane = kzalloc(sizeof(*tplane), GFP_KERNEL); 207 if (!tplane) 208 return ERR_PTR(-ENOMEM); 209 210 tplane->hw_plane_id = hw_plane_id; 211 212 possible_crtcs = crtc_mask; 213 type = plane_type; 214 215 ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane, 216 possible_crtcs, 217 &tidss_plane_funcs, 218 formats, num_formats, 219 NULL, type, NULL); 220 if (ret < 0) 221 goto err; 222 223 if (type == DRM_PLANE_TYPE_PRIMARY) 224 drm_plane_helper_add(&tplane->plane, &tidss_primary_plane_helper_funcs); 225 else 226 drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs); 227 228 drm_plane_create_zpos_property(&tplane->plane, tidss->num_planes, 0, 229 num_planes - 1); 230 231 ret = drm_plane_create_color_properties(&tplane->plane, 232 color_encodings, 233 color_ranges, 234 default_encoding, 235 default_range); 236 if (ret) 237 goto err; 238 239 ret = drm_plane_create_alpha_property(&tplane->plane); 240 if (ret) 241 goto err; 242 243 ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes); 244 if (ret) 245 goto err; 246 247 return tplane; 248 249 err: 250 kfree(tplane); 251 return ERR_PTR(ret); 252 } 253