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