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