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_writecombine(cursor->dev, 161 cursor->pixmap.size, 162 cursor->pixmap.base, 163 cursor->pixmap.paddr); 164 165 cursor->pixmap.size = cursor->width * cursor->height; 166 167 cursor->pixmap.base = dma_alloc_writecombine(cursor->dev, 168 cursor->pixmap.size, 169 &cursor->pixmap.paddr, 170 GFP_KERNEL | GFP_DMA); 171 if (!cursor->pixmap.base) { 172 DRM_ERROR("Failed to allocate memory for pixmap\n"); 173 return; 174 } 175 } 176 177 cma_obj = drm_fb_cma_get_gem_obj(fb, 0); 178 if (!cma_obj) { 179 DRM_ERROR("Can't get CMA GEM object for fb\n"); 180 return; 181 } 182 183 /* Convert ARGB8888 to CLUT8 */ 184 sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr); 185 186 /* AWS and AWE depend on the mode */ 187 y = sti_vtg_get_line_number(*mode, 0); 188 x = sti_vtg_get_pixel_number(*mode, 0); 189 val = y << 16 | x; 190 writel(val, cursor->regs + CUR_AWS); 191 y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); 192 x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); 193 val = y << 16 | x; 194 writel(val, cursor->regs + CUR_AWE); 195 196 if (first_prepare) { 197 /* Set and fetch CLUT */ 198 writel(cursor->clut_paddr, cursor->regs + CUR_CML); 199 writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL); 200 } 201 202 /* Set memory location, size, and position */ 203 writel(cursor->pixmap.paddr, cursor->regs + CUR_PML); 204 writel(cursor->width, cursor->regs + CUR_PMP); 205 writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE); 206 207 y = sti_vtg_get_line_number(*mode, dst_y); 208 x = sti_vtg_get_pixel_number(*mode, dst_y); 209 writel((y << 16) | x, cursor->regs + CUR_VPO); 210 211 plane->status = STI_PLANE_UPDATED; 212 } 213 214 static void sti_cursor_atomic_disable(struct drm_plane *drm_plane, 215 struct drm_plane_state *oldstate) 216 { 217 struct sti_plane *plane = to_sti_plane(drm_plane); 218 struct sti_mixer *mixer = to_sti_mixer(drm_plane->crtc); 219 220 if (!drm_plane->crtc) { 221 DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", 222 drm_plane->base.id); 223 return; 224 } 225 226 DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", 227 drm_plane->crtc->base.id, sti_mixer_to_str(mixer), 228 drm_plane->base.id, sti_plane_to_str(plane)); 229 230 plane->status = STI_PLANE_DISABLING; 231 } 232 233 static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = { 234 .atomic_update = sti_cursor_atomic_update, 235 .atomic_disable = sti_cursor_atomic_disable, 236 }; 237 238 struct drm_plane *sti_cursor_create(struct drm_device *drm_dev, 239 struct device *dev, int desc, 240 void __iomem *baseaddr, 241 unsigned int possible_crtcs) 242 { 243 struct sti_cursor *cursor; 244 size_t size; 245 int res; 246 247 cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL); 248 if (!cursor) { 249 DRM_ERROR("Failed to allocate memory for cursor\n"); 250 return NULL; 251 } 252 253 /* Allocate clut buffer */ 254 size = 0x100 * sizeof(unsigned short); 255 cursor->clut = dma_alloc_writecombine(dev, size, &cursor->clut_paddr, 256 GFP_KERNEL | GFP_DMA); 257 258 if (!cursor->clut) { 259 DRM_ERROR("Failed to allocate memory for cursor clut\n"); 260 goto err_clut; 261 } 262 263 cursor->dev = dev; 264 cursor->regs = baseaddr; 265 cursor->plane.desc = desc; 266 cursor->plane.status = STI_PLANE_DISABLED; 267 268 sti_cursor_init(cursor); 269 270 res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane, 271 possible_crtcs, 272 &sti_plane_helpers_funcs, 273 cursor_supported_formats, 274 ARRAY_SIZE(cursor_supported_formats), 275 DRM_PLANE_TYPE_CURSOR, NULL); 276 if (res) { 277 DRM_ERROR("Failed to initialize universal plane\n"); 278 goto err_plane; 279 } 280 281 drm_plane_helper_add(&cursor->plane.drm_plane, 282 &sti_cursor_helpers_funcs); 283 284 sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR); 285 286 return &cursor->plane.drm_plane; 287 288 err_plane: 289 dma_free_writecombine(dev, size, cursor->clut, cursor->clut_paddr); 290 err_clut: 291 devm_kfree(dev, cursor); 292 return NULL; 293 } 294