1 /* 2 * Copyright (C) STMicroelectronics SA 2014 3 * Authors: Vincent Abriou <vincent.abriou@st.com> 4 * Fabien Dessenne <fabien.dessenne@st.com> 5 * for STMicroelectronics. 6 * License terms: GNU General Public License (GPL), version 2 7 */ 8 #include <drm/drmP.h> 9 10 #include <drm/drm_atomic_helper.h> 11 #include <drm/drm_fb_cma_helper.h> 12 #include <drm/drm_gem_cma_helper.h> 13 #include <drm/drm_plane_helper.h> 14 15 #include "sti_compositor.h" 16 #include "sti_cursor.h" 17 #include "sti_plane.h" 18 #include "sti_vtg.h" 19 20 /* Registers */ 21 #define CUR_CTL 0x00 22 #define CUR_VPO 0x0C 23 #define CUR_PML 0x14 24 #define CUR_PMP 0x18 25 #define CUR_SIZE 0x1C 26 #define CUR_CML 0x20 27 #define CUR_AWS 0x28 28 #define CUR_AWE 0x2C 29 30 #define CUR_CTL_CLUT_UPDATE BIT(1) 31 32 #define STI_CURS_MIN_SIZE 1 33 #define STI_CURS_MAX_SIZE 128 34 35 /* 36 * pixmap dma buffer stucture 37 * 38 * @paddr: physical address 39 * @size: buffer size 40 * @base: virtual address 41 */ 42 struct dma_pixmap { 43 dma_addr_t paddr; 44 size_t size; 45 void *base; 46 }; 47 48 /** 49 * STI Cursor structure 50 * 51 * @sti_plane: sti_plane structure 52 * @dev: driver device 53 * @regs: cursor registers 54 * @width: cursor width 55 * @height: cursor height 56 * @clut: color look up table 57 * @clut_paddr: color look up table physical address 58 * @pixmap: pixmap dma buffer (clut8-format cursor) 59 */ 60 struct sti_cursor { 61 struct sti_plane plane; 62 struct device *dev; 63 void __iomem *regs; 64 unsigned int width; 65 unsigned int height; 66 unsigned short *clut; 67 dma_addr_t clut_paddr; 68 struct dma_pixmap pixmap; 69 }; 70 71 static const uint32_t cursor_supported_formats[] = { 72 DRM_FORMAT_ARGB8888, 73 }; 74 75 #define to_sti_cursor(x) container_of(x, struct sti_cursor, plane) 76 77 static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src) 78 { 79 u8 *dst = cursor->pixmap.base; 80 unsigned int i, j; 81 u32 a, r, g, b; 82 83 for (i = 0; i < cursor->height; i++) { 84 for (j = 0; j < cursor->width; j++) { 85 /* Pick the 2 higher bits of each component */ 86 a = (*src >> 30) & 3; 87 r = (*src >> 22) & 3; 88 g = (*src >> 14) & 3; 89 b = (*src >> 6) & 3; 90 *dst = a << 6 | r << 4 | g << 2 | b; 91 src++; 92 dst++; 93 } 94 } 95 } 96 97 static void sti_cursor_init(struct sti_cursor *cursor) 98 { 99 unsigned short *base = cursor->clut; 100 unsigned int a, r, g, b; 101 102 /* Assign CLUT values, ARGB444 format */ 103 for (a = 0; a < 4; a++) 104 for (r = 0; r < 4; r++) 105 for (g = 0; g < 4; g++) 106 for (b = 0; b < 4; b++) 107 *base++ = (a * 5) << 12 | 108 (r * 5) << 8 | 109 (g * 5) << 4 | 110 (b * 5); 111 } 112 113 static void sti_cursor_atomic_update(struct drm_plane *drm_plane, 114 struct drm_plane_state *oldstate) 115 { 116 struct drm_plane_state *state = drm_plane->state; 117 struct sti_plane *plane = to_sti_plane(drm_plane); 118 struct sti_cursor *cursor = to_sti_cursor(plane); 119 struct drm_crtc *crtc = state->crtc; 120 struct sti_mixer *mixer = to_sti_mixer(crtc); 121 struct drm_framebuffer *fb = state->fb; 122 struct drm_display_mode *mode = &crtc->mode; 123 int dst_x = state->crtc_x; 124 int dst_y = state->crtc_y; 125 int dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x); 126 int dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y); 127 /* src_x are in 16.16 format */ 128 int src_w = state->src_w >> 16; 129 int src_h = state->src_h >> 16; 130 bool first_prepare = plane->status == STI_PLANE_DISABLED ? true : false; 131 struct drm_gem_cma_object *cma_obj; 132 u32 y, x; 133 u32 val; 134 135 DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n", 136 crtc->base.id, sti_mixer_to_str(mixer), 137 drm_plane->base.id, sti_plane_to_str(plane)); 138 DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y); 139 140 dev_dbg(cursor->dev, "%s %s\n", __func__, 141 sti_plane_to_str(plane)); 142 143 if (src_w < STI_CURS_MIN_SIZE || 144 src_h < STI_CURS_MIN_SIZE || 145 src_w > STI_CURS_MAX_SIZE || 146 src_h > STI_CURS_MAX_SIZE) { 147 DRM_ERROR("Invalid cursor size (%dx%d)\n", 148 src_w, src_h); 149 return; 150 } 151 152 /* If the cursor size has changed, re-allocated the pixmap */ 153 if (!cursor->pixmap.base || 154 (cursor->width != src_w) || 155 (cursor->height != src_h)) { 156 cursor->width = src_w; 157 cursor->height = src_h; 158 159 if (cursor->pixmap.base) 160 dma_free_wc(cursor->dev, cursor->pixmap.size, 161 cursor->pixmap.base, cursor->pixmap.paddr); 162 163 cursor->pixmap.size = cursor->width * cursor->height; 164 165 cursor->pixmap.base = dma_alloc_wc(cursor->dev, 166 cursor->pixmap.size, 167 &cursor->pixmap.paddr, 168 GFP_KERNEL | GFP_DMA); 169 if (!cursor->pixmap.base) { 170 DRM_ERROR("Failed to allocate memory for pixmap\n"); 171 return; 172 } 173 } 174 175 cma_obj = drm_fb_cma_get_gem_obj(fb, 0); 176 if (!cma_obj) { 177 DRM_ERROR("Can't get CMA GEM object for fb\n"); 178 return; 179 } 180 181 /* Convert ARGB8888 to CLUT8 */ 182 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr); 183 184 /* AWS and AWE depend on the mode */ 185 y = sti_vtg_get_line_number(*mode, 0); 186 x = sti_vtg_get_pixel_number(*mode, 0); 187 val = y << 16 | x; 188 writel(val, cursor->regs + CUR_AWS); 189 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 190 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 191 val = y << 16 | x; 192 writel(val, cursor->regs + CUR_AWE); 193 194 if (first_prepare) { 195 /* Set and fetch CLUT */ 196 writel(cursor->clut_paddr, cursor->regs + CUR_CML); 197 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL); 198 } 199 200 /* Set memory location, size, and position */ 201 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML); 202 writel(cursor->width, cursor->regs + CUR_PMP); 203 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE); 204 205 y = sti_vtg_get_line_number(*mode, dst_y); 206 x = sti_vtg_get_pixel_number(*mode, dst_y); 207 writel((y << 16) | x, cursor->regs + CUR_VPO); 208 209 plane->status = STI_PLANE_UPDATED; 210 } 211 212 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane, 213 struct drm_plane_state *oldstate) 214 { 215 struct sti_plane *plane = to_sti_plane(drm_plane); 216 struct sti_mixer *mixer = to_sti_mixer(drm_plane->crtc); 217 218 if (!drm_plane->crtc) { 219 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", 220 drm_plane->base.id); 221 return; 222 } 223 224 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", 225 drm_plane->crtc->base.id, sti_mixer_to_str(mixer), 226 drm_plane->base.id, sti_plane_to_str(plane)); 227 228 plane->status = STI_PLANE_DISABLING; 229 } 230 231 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = { 232 .atomic_update = sti_cursor_atomic_update, 233 .atomic_disable = sti_cursor_atomic_disable, 234 }; 235 236 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev, 237 struct device *dev, int desc, 238 void __iomem *baseaddr, 239 unsigned int possible_crtcs) 240 { 241 struct sti_cursor *cursor; 242 size_t size; 243 int res; 244 245 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL); 246 if (!cursor) { 247 DRM_ERROR("Failed to allocate memory for cursor\n"); 248 return NULL; 249 } 250 251 /* Allocate clut buffer */ 252 size = 0x100 * sizeof(unsigned short); 253 cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr, 254 GFP_KERNEL | GFP_DMA); 255 256 if (!cursor->clut) { 257 DRM_ERROR("Failed to allocate memory for cursor clut\n"); 258 goto err_clut; 259 } 260 261 cursor->dev = dev; 262 cursor->regs = baseaddr; 263 cursor->plane.desc = desc; 264 cursor->plane.status = STI_PLANE_DISABLED; 265 266 sti_cursor_init(cursor); 267 268 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane, 269 possible_crtcs, 270 &sti_plane_helpers_funcs, 271 cursor_supported_formats, 272 ARRAY_SIZE(cursor_supported_formats), 273 DRM_PLANE_TYPE_CURSOR, NULL); 274 if (res) { 275 DRM_ERROR("Failed to initialize universal plane\n"); 276 goto err_plane; 277 } 278 279 drm_plane_helper_add(&cursor->plane.drm_plane, 280 &sti_cursor_helpers_funcs); 281 282 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR); 283 284 return &cursor->plane.drm_plane; 285 286 err_plane: 287 dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr); 288 err_clut: 289 devm_kfree(dev, cursor); 290 return NULL; 291 } 292