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 9 #include <drm/drm_atomic.h> 10 #include <drm/drm_atomic_helper.h> 11 #include <drm/drm_crtc.h> 12 #include <drm/drm_fb_cma_helper.h> 13 #include <drm/drm_fourcc.h> 14 #include <drm/drm_gem_cma_helper.h> 15 #include <drm/drm_probe_helper.h> 16 #include <drm/drm_writeback.h> 17 18 #include "malidp_drv.h" 19 #include "malidp_hw.h" 20 #include "malidp_mw.h" 21 22 #define to_mw_state(_state) (struct malidp_mw_connector_state *)(_state) 23 24 struct malidp_mw_connector_state { 25 struct drm_connector_state base; 26 dma_addr_t addrs[2]; 27 s32 pitches[2]; 28 u8 format; 29 u8 n_planes; 30 bool rgb2yuv_initialized; 31 const s16 *rgb2yuv_coeffs; 32 }; 33 34 static int malidp_mw_connector_get_modes(struct drm_connector *connector) 35 { 36 struct drm_device *dev = connector->dev; 37 38 return drm_add_modes_noedid(connector, dev->mode_config.max_width, 39 dev->mode_config.max_height); 40 } 41 42 static enum drm_mode_status 43 malidp_mw_connector_mode_valid(struct drm_connector *connector, 44 struct drm_display_mode *mode) 45 { 46 struct drm_device *dev = connector->dev; 47 struct drm_mode_config *mode_config = &dev->mode_config; 48 int w = mode->hdisplay, h = mode->vdisplay; 49 50 if ((w < mode_config->min_width) || (w > mode_config->max_width)) 51 return MODE_BAD_HVALUE; 52 53 if ((h < mode_config->min_height) || (h > mode_config->max_height)) 54 return MODE_BAD_VVALUE; 55 56 return MODE_OK; 57 } 58 59 static const struct drm_connector_helper_funcs malidp_mw_connector_helper_funcs = { 60 .get_modes = malidp_mw_connector_get_modes, 61 .mode_valid = malidp_mw_connector_mode_valid, 62 }; 63 64 static void malidp_mw_connector_reset(struct drm_connector *connector) 65 { 66 struct malidp_mw_connector_state *mw_state = 67 kzalloc(sizeof(*mw_state), GFP_KERNEL); 68 69 if (connector->state) 70 __drm_atomic_helper_connector_destroy_state(connector->state); 71 72 kfree(connector->state); 73 __drm_atomic_helper_connector_reset(connector, &mw_state->base); 74 } 75 76 static enum drm_connector_status 77 malidp_mw_connector_detect(struct drm_connector *connector, bool force) 78 { 79 return connector_status_connected; 80 } 81 82 static void malidp_mw_connector_destroy(struct drm_connector *connector) 83 { 84 drm_connector_cleanup(connector); 85 } 86 87 static struct drm_connector_state * 88 malidp_mw_connector_duplicate_state(struct drm_connector *connector) 89 { 90 struct malidp_mw_connector_state *mw_state, *mw_current_state; 91 92 if (WARN_ON(!connector->state)) 93 return NULL; 94 95 mw_state = kzalloc(sizeof(*mw_state), GFP_KERNEL); 96 if (!mw_state) 97 return NULL; 98 99 mw_current_state = to_mw_state(connector->state); 100 mw_state->rgb2yuv_coeffs = mw_current_state->rgb2yuv_coeffs; 101 mw_state->rgb2yuv_initialized = mw_current_state->rgb2yuv_initialized; 102 103 __drm_atomic_helper_connector_duplicate_state(connector, &mw_state->base); 104 105 return &mw_state->base; 106 } 107 108 static const struct drm_connector_funcs malidp_mw_connector_funcs = { 109 .reset = malidp_mw_connector_reset, 110 .detect = malidp_mw_connector_detect, 111 .fill_modes = drm_helper_probe_single_connector_modes, 112 .destroy = malidp_mw_connector_destroy, 113 .atomic_duplicate_state = malidp_mw_connector_duplicate_state, 114 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 115 }; 116 117 static const s16 rgb2yuv_coeffs_bt709_limited[MALIDP_COLORADJ_NUM_COEFFS] = { 118 47, 157, 16, 119 -26, -87, 112, 120 112, -102, -10, 121 16, 128, 128 122 }; 123 124 static int 125 malidp_mw_encoder_atomic_check(struct drm_encoder *encoder, 126 struct drm_crtc_state *crtc_state, 127 struct drm_connector_state *conn_state) 128 { 129 struct malidp_mw_connector_state *mw_state = to_mw_state(conn_state); 130 struct malidp_drm *malidp = encoder->dev->dev_private; 131 struct drm_framebuffer *fb; 132 int i, n_planes; 133 134 if (!conn_state->writeback_job) 135 return 0; 136 137 fb = conn_state->writeback_job->fb; 138 if ((fb->width != crtc_state->mode.hdisplay) || 139 (fb->height != crtc_state->mode.vdisplay)) { 140 DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", 141 fb->width, fb->height); 142 return -EINVAL; 143 } 144 145 if (fb->modifier) { 146 DRM_DEBUG_KMS("Writeback framebuffer does not support modifiers\n"); 147 return -EINVAL; 148 } 149 150 mw_state->format = 151 malidp_hw_get_format_id(&malidp->dev->hw->map, SE_MEMWRITE, 152 fb->format->format, !!fb->modifier); 153 if (mw_state->format == MALIDP_INVALID_FORMAT_ID) { 154 DRM_DEBUG_KMS("Invalid pixel format %p4cc\n", 155 &fb->format->format); 156 return -EINVAL; 157 } 158 159 n_planes = fb->format->num_planes; 160 for (i = 0; i < n_planes; i++) { 161 struct drm_gem_cma_object *obj = drm_fb_cma_get_gem_obj(fb, i); 162 /* memory write buffers are never rotated */ 163 u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 0); 164 165 if (fb->pitches[i] & (alignment - 1)) { 166 DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n", 167 fb->pitches[i], i); 168 return -EINVAL; 169 } 170 mw_state->pitches[i] = fb->pitches[i]; 171 mw_state->addrs[i] = obj->paddr + fb->offsets[i]; 172 } 173 mw_state->n_planes = n_planes; 174 175 if (fb->format->is_yuv) 176 mw_state->rgb2yuv_coeffs = rgb2yuv_coeffs_bt709_limited; 177 178 return 0; 179 } 180 181 static const struct drm_encoder_helper_funcs malidp_mw_encoder_helper_funcs = { 182 .atomic_check = malidp_mw_encoder_atomic_check, 183 }; 184 185 static u32 *get_writeback_formats(struct malidp_drm *malidp, int *n_formats) 186 { 187 const struct malidp_hw_regmap *map = &malidp->dev->hw->map; 188 u32 *formats; 189 int n, i; 190 191 formats = kcalloc(map->n_pixel_formats, sizeof(*formats), 192 GFP_KERNEL); 193 if (!formats) 194 return NULL; 195 196 for (n = 0, i = 0; i < map->n_pixel_formats; i++) { 197 if (map->pixel_formats[i].layer & SE_MEMWRITE) 198 formats[n++] = map->pixel_formats[i].format; 199 } 200 201 *n_formats = n; 202 203 return formats; 204 } 205 206 int malidp_mw_connector_init(struct drm_device *drm) 207 { 208 struct malidp_drm *malidp = drm->dev_private; 209 u32 *formats; 210 int ret, n_formats; 211 212 if (!malidp->dev->hw->enable_memwrite) 213 return 0; 214 215 malidp->mw_connector.encoder.possible_crtcs = 1 << drm_crtc_index(&malidp->crtc); 216 drm_connector_helper_add(&malidp->mw_connector.base, 217 &malidp_mw_connector_helper_funcs); 218 219 formats = get_writeback_formats(malidp, &n_formats); 220 if (!formats) 221 return -ENOMEM; 222 223 ret = drm_writeback_connector_init(drm, &malidp->mw_connector, 224 &malidp_mw_connector_funcs, 225 &malidp_mw_encoder_helper_funcs, 226 formats, n_formats); 227 kfree(formats); 228 if (ret) 229 return ret; 230 231 return 0; 232 } 233 234 void malidp_mw_atomic_commit(struct drm_device *drm, 235 struct drm_atomic_state *old_state) 236 { 237 struct malidp_drm *malidp = drm->dev_private; 238 struct drm_writeback_connector *mw_conn = &malidp->mw_connector; 239 struct drm_connector_state *conn_state = mw_conn->base.state; 240 struct malidp_hw_device *hwdev = malidp->dev; 241 struct malidp_mw_connector_state *mw_state; 242 243 if (!conn_state) 244 return; 245 246 mw_state = to_mw_state(conn_state); 247 248 if (conn_state->writeback_job) { 249 struct drm_framebuffer *fb = conn_state->writeback_job->fb; 250 251 DRM_DEV_DEBUG_DRIVER(drm->dev, 252 "Enable memwrite %ux%u:%d %pad fmt: %u\n", 253 fb->width, fb->height, 254 mw_state->pitches[0], 255 &mw_state->addrs[0], 256 mw_state->format); 257 258 drm_writeback_queue_job(mw_conn, conn_state); 259 hwdev->hw->enable_memwrite(hwdev, mw_state->addrs, 260 mw_state->pitches, mw_state->n_planes, 261 fb->width, fb->height, mw_state->format, 262 !mw_state->rgb2yuv_initialized ? 263 mw_state->rgb2yuv_coeffs : NULL); 264 mw_state->rgb2yuv_initialized = !!mw_state->rgb2yuv_coeffs; 265 } else { 266 DRM_DEV_DEBUG_DRIVER(drm->dev, "Disable memwrite\n"); 267 hwdev->hw->disable_memwrite(hwdev); 268 } 269 } 270