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_crtc_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 }; 30 31 static int malidp_mw_connector_get_modes(struct drm_connector *connector) 32 { 33 struct drm_device *dev = connector->dev; 34 35 return drm_add_modes_noedid(connector, dev->mode_config.max_width, 36 dev->mode_config.max_height); 37 } 38 39 static enum drm_mode_status 40 malidp_mw_connector_mode_valid(struct drm_connector *connector, 41 struct drm_display_mode *mode) 42 { 43 struct drm_device *dev = connector->dev; 44 struct drm_mode_config *mode_config = &dev->mode_config; 45 int w = mode->hdisplay, h = mode->vdisplay; 46 47 if ((w < mode_config->min_width) || (w > mode_config->max_width)) 48 return MODE_BAD_HVALUE; 49 50 if ((h < mode_config->min_height) || (h > mode_config->max_height)) 51 return MODE_BAD_VVALUE; 52 53 return MODE_OK; 54 } 55 56 const struct drm_connector_helper_funcs malidp_mw_connector_helper_funcs = { 57 .get_modes = malidp_mw_connector_get_modes, 58 .mode_valid = malidp_mw_connector_mode_valid, 59 }; 60 61 static void malidp_mw_connector_reset(struct drm_connector *connector) 62 { 63 struct malidp_mw_connector_state *mw_state = 64 kzalloc(sizeof(*mw_state), GFP_KERNEL); 65 66 if (connector->state) 67 __drm_atomic_helper_connector_destroy_state(connector->state); 68 69 kfree(connector->state); 70 __drm_atomic_helper_connector_reset(connector, &mw_state->base); 71 } 72 73 static enum drm_connector_status 74 malidp_mw_connector_detect(struct drm_connector *connector, bool force) 75 { 76 return connector_status_disconnected; 77 } 78 79 static void malidp_mw_connector_destroy(struct drm_connector *connector) 80 { 81 drm_connector_cleanup(connector); 82 } 83 84 static struct drm_connector_state * 85 malidp_mw_connector_duplicate_state(struct drm_connector *connector) 86 { 87 struct malidp_mw_connector_state *mw_state; 88 89 if (WARN_ON(!connector->state)) 90 return NULL; 91 92 mw_state = kzalloc(sizeof(*mw_state), GFP_KERNEL); 93 if (!mw_state) 94 return NULL; 95 96 /* No need to preserve any of our driver-local data */ 97 __drm_atomic_helper_connector_duplicate_state(connector, &mw_state->base); 98 99 return &mw_state->base; 100 } 101 102 static const struct drm_connector_funcs malidp_mw_connector_funcs = { 103 .reset = malidp_mw_connector_reset, 104 .detect = malidp_mw_connector_detect, 105 .fill_modes = drm_helper_probe_single_connector_modes, 106 .destroy = malidp_mw_connector_destroy, 107 .atomic_duplicate_state = malidp_mw_connector_duplicate_state, 108 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 109 }; 110 111 static int 112 malidp_mw_encoder_atomic_check(struct drm_encoder *encoder, 113 struct drm_crtc_state *crtc_state, 114 struct drm_connector_state *conn_state) 115 { 116 struct malidp_mw_connector_state *mw_state = to_mw_state(conn_state); 117 struct malidp_drm *malidp = encoder->dev->dev_private; 118 struct drm_framebuffer *fb; 119 int i, n_planes; 120 121 if (!conn_state->writeback_job || !conn_state->writeback_job->fb) 122 return 0; 123 124 fb = conn_state->writeback_job->fb; 125 if ((fb->width != crtc_state->mode.hdisplay) || 126 (fb->height != crtc_state->mode.vdisplay)) { 127 DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", 128 fb->width, fb->height); 129 return -EINVAL; 130 } 131 132 mw_state->format = 133 malidp_hw_get_format_id(&malidp->dev->hw->map, SE_MEMWRITE, 134 fb->format->format); 135 if (mw_state->format == MALIDP_INVALID_FORMAT_ID) { 136 struct drm_format_name_buf format_name; 137 138 DRM_DEBUG_KMS("Invalid pixel format %s\n", 139 drm_get_format_name(fb->format->format, 140 &format_name)); 141 return -EINVAL; 142 } 143 144 n_planes = drm_format_num_planes(fb->format->format); 145 for (i = 0; i < n_planes; i++) { 146 struct drm_gem_cma_object *obj = drm_fb_cma_get_gem_obj(fb, i); 147 /* memory write buffers are never rotated */ 148 u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 0); 149 150 if (fb->pitches[i] & (alignment - 1)) { 151 DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n", 152 fb->pitches[i], i); 153 return -EINVAL; 154 } 155 mw_state->pitches[i] = fb->pitches[i]; 156 mw_state->addrs[i] = obj->paddr + fb->offsets[i]; 157 } 158 mw_state->n_planes = n_planes; 159 160 return 0; 161 } 162 163 static const struct drm_encoder_helper_funcs malidp_mw_encoder_helper_funcs = { 164 .atomic_check = malidp_mw_encoder_atomic_check, 165 }; 166 167 static u32 *get_writeback_formats(struct malidp_drm *malidp, int *n_formats) 168 { 169 const struct malidp_hw_regmap *map = &malidp->dev->hw->map; 170 u32 *formats; 171 int n, i; 172 173 formats = kcalloc(map->n_pixel_formats, sizeof(*formats), 174 GFP_KERNEL); 175 if (!formats) 176 return NULL; 177 178 for (n = 0, i = 0; i < map->n_pixel_formats; i++) { 179 if (map->pixel_formats[i].layer & SE_MEMWRITE) 180 formats[n++] = map->pixel_formats[i].format; 181 } 182 183 *n_formats = n; 184 185 return formats; 186 } 187 188 int malidp_mw_connector_init(struct drm_device *drm) 189 { 190 struct malidp_drm *malidp = drm->dev_private; 191 u32 *formats; 192 int ret, n_formats; 193 194 if (!malidp->dev->hw->enable_memwrite) 195 return 0; 196 197 malidp->mw_connector.encoder.possible_crtcs = 1 << drm_crtc_index(&malidp->crtc); 198 drm_connector_helper_add(&malidp->mw_connector.base, 199 &malidp_mw_connector_helper_funcs); 200 201 formats = get_writeback_formats(malidp, &n_formats); 202 if (!formats) 203 return -ENOMEM; 204 205 ret = drm_writeback_connector_init(drm, &malidp->mw_connector, 206 &malidp_mw_connector_funcs, 207 &malidp_mw_encoder_helper_funcs, 208 formats, n_formats); 209 kfree(formats); 210 if (ret) 211 return ret; 212 213 return 0; 214 } 215 216 void malidp_mw_atomic_commit(struct drm_device *drm, 217 struct drm_atomic_state *old_state) 218 { 219 struct malidp_drm *malidp = drm->dev_private; 220 struct drm_writeback_connector *mw_conn = &malidp->mw_connector; 221 struct drm_connector_state *conn_state = mw_conn->base.state; 222 struct malidp_hw_device *hwdev = malidp->dev; 223 struct malidp_mw_connector_state *mw_state; 224 225 if (!conn_state) 226 return; 227 228 mw_state = to_mw_state(conn_state); 229 230 if (conn_state->writeback_job && conn_state->writeback_job->fb) { 231 struct drm_framebuffer *fb = conn_state->writeback_job->fb; 232 233 DRM_DEV_DEBUG_DRIVER(drm->dev, 234 "Enable memwrite %ux%u:%d %pad fmt: %u\n", 235 fb->width, fb->height, 236 mw_state->pitches[0], 237 &mw_state->addrs[0], 238 mw_state->format); 239 240 drm_writeback_queue_job(mw_conn, conn_state->writeback_job); 241 conn_state->writeback_job = NULL; 242 243 hwdev->hw->enable_memwrite(hwdev, mw_state->addrs, 244 mw_state->pitches, mw_state->n_planes, 245 fb->width, fb->height, mw_state->format); 246 } else { 247 DRM_DEV_DEBUG_DRIVER(drm->dev, "Disable memwrite\n"); 248 hwdev->hw->disable_memwrite(hwdev); 249 } 250 } 251