1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. 4 * Author: Brian Starkey <brian.starkey@arm.com> 5 * 6 * ARM Mali DP Writeback connector implementation 7 */ 8 #include <drm/drm_atomic.h> 9 #include <drm/drm_atomic_helper.h> 10 #include <drm/drm_crtc.h> 11 #include <drm/drm_probe_helper.h> 12 #include <drm/drm_fb_cma_helper.h> 13 #include <drm/drm_gem_cma_helper.h> 14 #include <drm/drmP.h> 15 #include <drm/drm_writeback.h> 16 17 #include "malidp_drv.h" 18 #include "malidp_hw.h" 19 #include "malidp_mw.h" 20 21 #define to_mw_state(_state) (struct malidp_mw_connector_state *)(_state) 22 23 struct malidp_mw_connector_state { 24 struct drm_connector_state base; 25 dma_addr_t addrs[2]; 26 s32 pitches[2]; 27 u8 format; 28 u8 n_planes; 29 bool rgb2yuv_initialized; 30 const s16 *rgb2yuv_coeffs; 31 }; 32 33 static int malidp_mw_connector_get_modes(struct drm_connector *connector) 34 { 35 struct drm_device *dev = connector->dev; 36 37 return drm_add_modes_noedid(connector, dev->mode_config.max_width, 38 dev->mode_config.max_height); 39 } 40 41 static enum drm_mode_status 42 malidp_mw_connector_mode_valid(struct drm_connector *connector, 43 struct drm_display_mode *mode) 44 { 45 struct drm_device *dev = connector->dev; 46 struct drm_mode_config *mode_config = &dev->mode_config; 47 int w = mode->hdisplay, h = mode->vdisplay; 48 49 if ((w < mode_config->min_width) || (w > mode_config->max_width)) 50 return MODE_BAD_HVALUE; 51 52 if ((h < mode_config->min_height) || (h > mode_config->max_height)) 53 return MODE_BAD_VVALUE; 54 55 return MODE_OK; 56 } 57 58 const struct drm_connector_helper_funcs malidp_mw_connector_helper_funcs = { 59 .get_modes = malidp_mw_connector_get_modes, 60 .mode_valid = malidp_mw_connector_mode_valid, 61 }; 62 63 static void malidp_mw_connector_reset(struct drm_connector *connector) 64 { 65 struct malidp_mw_connector_state *mw_state = 66 kzalloc(sizeof(*mw_state), GFP_KERNEL); 67 68 if (connector->state) 69 __drm_atomic_helper_connector_destroy_state(connector->state); 70 71 kfree(connector->state); 72 __drm_atomic_helper_connector_reset(connector, &mw_state->base); 73 } 74 75 static enum drm_connector_status 76 malidp_mw_connector_detect(struct drm_connector *connector, bool force) 77 { 78 return connector_status_connected; 79 } 80 81 static void malidp_mw_connector_destroy(struct drm_connector *connector) 82 { 83 drm_connector_cleanup(connector); 84 } 85 86 static struct drm_connector_state * 87 malidp_mw_connector_duplicate_state(struct drm_connector *connector) 88 { 89 struct malidp_mw_connector_state *mw_state, *mw_current_state; 90 91 if (WARN_ON(!connector->state)) 92 return NULL; 93 94 mw_state = kzalloc(sizeof(*mw_state), GFP_KERNEL); 95 if (!mw_state) 96 return NULL; 97 98 mw_current_state = to_mw_state(connector->state); 99 mw_state->rgb2yuv_coeffs = mw_current_state->rgb2yuv_coeffs; 100 mw_state->rgb2yuv_initialized = mw_current_state->rgb2yuv_initialized; 101 102 __drm_atomic_helper_connector_duplicate_state(connector, &mw_state->base); 103 104 return &mw_state->base; 105 } 106 107 static const struct drm_connector_funcs malidp_mw_connector_funcs = { 108 .reset = malidp_mw_connector_reset, 109 .detect = malidp_mw_connector_detect, 110 .fill_modes = drm_helper_probe_single_connector_modes, 111 .destroy = malidp_mw_connector_destroy, 112 .atomic_duplicate_state = malidp_mw_connector_duplicate_state, 113 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 114 }; 115 116 static const s16 rgb2yuv_coeffs_bt709_limited[MALIDP_COLORADJ_NUM_COEFFS] = { 117 47, 157, 16, 118 -26, -87, 112, 119 112, -102, -10, 120 16, 128, 128 121 }; 122 123 static int 124 malidp_mw_encoder_atomic_check(struct drm_encoder *encoder, 125 struct drm_crtc_state *crtc_state, 126 struct drm_connector_state *conn_state) 127 { 128 struct malidp_mw_connector_state *mw_state = to_mw_state(conn_state); 129 struct malidp_drm *malidp = encoder->dev->dev_private; 130 struct drm_framebuffer *fb; 131 int i, n_planes; 132 133 if (!conn_state->writeback_job || !conn_state->writeback_job->fb) 134 return 0; 135 136 fb = conn_state->writeback_job->fb; 137 if ((fb->width != crtc_state->mode.hdisplay) || 138 (fb->height != crtc_state->mode.vdisplay)) { 139 DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", 140 fb->width, fb->height); 141 return -EINVAL; 142 } 143 144 if (fb->modifier) { 145 DRM_DEBUG_KMS("Writeback framebuffer does not support modifiers\n"); 146 return -EINVAL; 147 } 148 149 mw_state->format = 150 malidp_hw_get_format_id(&malidp->dev->hw->map, SE_MEMWRITE, 151 fb->format->format, !!fb->modifier); 152 if (mw_state->format == MALIDP_INVALID_FORMAT_ID) { 153 struct drm_format_name_buf format_name; 154 155 DRM_DEBUG_KMS("Invalid pixel format %s\n", 156 drm_get_format_name(fb->format->format, 157 &format_name)); 158 return -EINVAL; 159 } 160 161 n_planes = drm_format_num_planes(fb->format->format); 162 for (i = 0; i < n_planes; i++) { 163 struct drm_gem_cma_object *obj = drm_fb_cma_get_gem_obj(fb, i); 164 /* memory write buffers are never rotated */ 165 u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 0); 166 167 if (fb->pitches[i] & (alignment - 1)) { 168 DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n", 169 fb->pitches[i], i); 170 return -EINVAL; 171 } 172 mw_state->pitches[i] = fb->pitches[i]; 173 mw_state->addrs[i] = obj->paddr + fb->offsets[i]; 174 } 175 mw_state->n_planes = n_planes; 176 177 if (fb->format->is_yuv) 178 mw_state->rgb2yuv_coeffs = rgb2yuv_coeffs_bt709_limited; 179 180 return 0; 181 } 182 183 static const struct drm_encoder_helper_funcs malidp_mw_encoder_helper_funcs = { 184 .atomic_check = malidp_mw_encoder_atomic_check, 185 }; 186 187 static u32 *get_writeback_formats(struct malidp_drm *malidp, int *n_formats) 188 { 189 const struct malidp_hw_regmap *map = &malidp->dev->hw->map; 190 u32 *formats; 191 int n, i; 192 193 formats = kcalloc(map->n_pixel_formats, sizeof(*formats), 194 GFP_KERNEL); 195 if (!formats) 196 return NULL; 197 198 for (n = 0, i = 0; i < map->n_pixel_formats; i++) { 199 if (map->pixel_formats[i].layer & SE_MEMWRITE) 200 formats[n++] = map->pixel_formats[i].format; 201 } 202 203 *n_formats = n; 204 205 return formats; 206 } 207 208 int malidp_mw_connector_init(struct drm_device *drm) 209 { 210 struct malidp_drm *malidp = drm->dev_private; 211 u32 *formats; 212 int ret, n_formats; 213 214 if (!malidp->dev->hw->enable_memwrite) 215 return 0; 216 217 malidp->mw_connector.encoder.possible_crtcs = 1 << drm_crtc_index(&malidp->crtc); 218 drm_connector_helper_add(&malidp->mw_connector.base, 219 &malidp_mw_connector_helper_funcs); 220 221 formats = get_writeback_formats(malidp, &n_formats); 222 if (!formats) 223 return -ENOMEM; 224 225 ret = drm_writeback_connector_init(drm, &malidp->mw_connector, 226 &malidp_mw_connector_funcs, 227 &malidp_mw_encoder_helper_funcs, 228 formats, n_formats); 229 kfree(formats); 230 if (ret) 231 return ret; 232 233 return 0; 234 } 235 236 void malidp_mw_atomic_commit(struct drm_device *drm, 237 struct drm_atomic_state *old_state) 238 { 239 struct malidp_drm *malidp = drm->dev_private; 240 struct drm_writeback_connector *mw_conn = &malidp->mw_connector; 241 struct drm_connector_state *conn_state = mw_conn->base.state; 242 struct malidp_hw_device *hwdev = malidp->dev; 243 struct malidp_mw_connector_state *mw_state; 244 245 if (!conn_state) 246 return; 247 248 mw_state = to_mw_state(conn_state); 249 250 if (conn_state->writeback_job && conn_state->writeback_job->fb) { 251 struct drm_framebuffer *fb = conn_state->writeback_job->fb; 252 253 DRM_DEV_DEBUG_DRIVER(drm->dev, 254 "Enable memwrite %ux%u:%d %pad fmt: %u\n", 255 fb->width, fb->height, 256 mw_state->pitches[0], 257 &mw_state->addrs[0], 258 mw_state->format); 259 260 drm_writeback_queue_job(mw_conn, conn_state); 261 hwdev->hw->enable_memwrite(hwdev, mw_state->addrs, 262 mw_state->pitches, mw_state->n_planes, 263 fb->width, fb->height, mw_state->format, 264 !mw_state->rgb2yuv_initialized ? 265 mw_state->rgb2yuv_coeffs : NULL); 266 mw_state->rgb2yuv_initialized = !!mw_state->rgb2yuv_coeffs; 267 } else { 268 DRM_DEV_DEBUG_DRIVER(drm->dev, "Disable memwrite\n"); 269 hwdev->hw->disable_memwrite(hwdev); 270 } 271 } 272