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