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