| /* |
| * Copyright (C) STMicroelectronics SA 2014 |
| * Authors: Vincent Abriou <vincent.abriou@st.com> |
| * Fabien Dessenne <fabien.dessenne@st.com> |
| * for STMicroelectronics. |
| * License terms: GNU General Public License (GPL), version 2 |
| */ |
| |
| #include <linux/seq_file.h> |
| |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_fb_cma_helper.h> |
| #include <drm/drm_gem_cma_helper.h> |
| |
| #include "sti_compositor.h" |
| #include "sti_cursor.h" |
| #include "sti_plane.h" |
| #include "sti_vtg.h" |
| |
| /* Registers */ |
| #define CUR_CTL 0x00 |
| #define CUR_VPO 0x0C |
| #define CUR_PML 0x14 |
| #define CUR_PMP 0x18 |
| #define CUR_SIZE 0x1C |
| #define CUR_CML 0x20 |
| #define CUR_AWS 0x28 |
| #define CUR_AWE 0x2C |
| |
| #define CUR_CTL_CLUT_UPDATE BIT(1) |
| |
| #define STI_CURS_MIN_SIZE 1 |
| #define STI_CURS_MAX_SIZE 128 |
| |
| /* |
| * pixmap dma buffer stucture |
| * |
| * @paddr: physical address |
| * @size: buffer size |
| * @base: virtual address |
| */ |
| struct dma_pixmap { |
| dma_addr_t paddr; |
| size_t size; |
| void *base; |
| }; |
| |
| /** |
| * STI Cursor structure |
| * |
| * @sti_plane: sti_plane structure |
| * @dev: driver device |
| * @regs: cursor registers |
| * @width: cursor width |
| * @height: cursor height |
| * @clut: color look up table |
| * @clut_paddr: color look up table physical address |
| * @pixmap: pixmap dma buffer (clut8-format cursor) |
| */ |
| struct sti_cursor { |
| struct sti_plane plane; |
| struct device *dev; |
| void __iomem *regs; |
| unsigned int width; |
| unsigned int height; |
| unsigned short *clut; |
| dma_addr_t clut_paddr; |
| struct dma_pixmap pixmap; |
| }; |
| |
| static const uint32_t cursor_supported_formats[] = { |
| DRM_FORMAT_ARGB8888, |
| }; |
| |
| #define to_sti_cursor(x) container_of(x, struct sti_cursor, plane) |
| |
| #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \ |
| readl(cursor->regs + reg)) |
| |
| static void cursor_dbg_vpo(struct seq_file *s, u32 val) |
| { |
| seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF); |
| } |
| |
| static void cursor_dbg_size(struct seq_file *s, u32 val) |
| { |
| seq_printf(s, "\t%d x %d", val & 0x07FF, (val >> 16) & 0x07FF); |
| } |
| |
| static void cursor_dbg_pml(struct seq_file *s, |
| struct sti_cursor *cursor, u32 val) |
| { |
| if (cursor->pixmap.paddr == val) |
| seq_printf(s, "\tVirt @: %p", cursor->pixmap.base); |
| } |
| |
| static void cursor_dbg_cml(struct seq_file *s, |
| struct sti_cursor *cursor, u32 val) |
| { |
| if (cursor->clut_paddr == val) |
| seq_printf(s, "\tVirt @: %p", cursor->clut); |
| } |
| |
| static int cursor_dbg_show(struct seq_file *s, void *data) |
| { |
| struct drm_info_node *node = s->private; |
| struct sti_cursor *cursor = (struct sti_cursor *)node->info_ent->data; |
| |
| seq_printf(s, "%s: (vaddr = 0x%p)", |
| sti_plane_to_str(&cursor->plane), cursor->regs); |
| |
| DBGFS_DUMP(CUR_CTL); |
| DBGFS_DUMP(CUR_VPO); |
| cursor_dbg_vpo(s, readl(cursor->regs + CUR_VPO)); |
| DBGFS_DUMP(CUR_PML); |
| cursor_dbg_pml(s, cursor, readl(cursor->regs + CUR_PML)); |
| DBGFS_DUMP(CUR_PMP); |
| DBGFS_DUMP(CUR_SIZE); |
| cursor_dbg_size(s, readl(cursor->regs + CUR_SIZE)); |
| DBGFS_DUMP(CUR_CML); |
| cursor_dbg_cml(s, cursor, readl(cursor->regs + CUR_CML)); |
| DBGFS_DUMP(CUR_AWS); |
| DBGFS_DUMP(CUR_AWE); |
| seq_puts(s, "\n"); |
| |
| return 0; |
| } |
| |
| static struct drm_info_list cursor_debugfs_files[] = { |
| { "cursor", cursor_dbg_show, 0, NULL }, |
| }; |
| |
| static int cursor_debugfs_init(struct sti_cursor *cursor, |
| struct drm_minor *minor) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(cursor_debugfs_files); i++) |
| cursor_debugfs_files[i].data = cursor; |
| |
| return drm_debugfs_create_files(cursor_debugfs_files, |
| ARRAY_SIZE(cursor_debugfs_files), |
| minor->debugfs_root, minor); |
| } |
| |
| static void sti_cursor_argb8888_to_clut8(struct sti_cursor *cursor, u32 *src) |
| { |
| u8 *dst = cursor->pixmap.base; |
| unsigned int i, j; |
| u32 a, r, g, b; |
| |
| for (i = 0; i < cursor->height; i++) { |
| for (j = 0; j < cursor->width; j++) { |
| /* Pick the 2 higher bits of each component */ |
| a = (*src >> 30) & 3; |
| r = (*src >> 22) & 3; |
| g = (*src >> 14) & 3; |
| b = (*src >> 6) & 3; |
| *dst = a << 6 | r << 4 | g << 2 | b; |
| src++; |
| dst++; |
| } |
| } |
| } |
| |
| static void sti_cursor_init(struct sti_cursor *cursor) |
| { |
| unsigned short *base = cursor->clut; |
| unsigned int a, r, g, b; |
| |
| /* Assign CLUT values, ARGB444 format */ |
| for (a = 0; a < 4; a++) |
| for (r = 0; r < 4; r++) |
| for (g = 0; g < 4; g++) |
| for (b = 0; b < 4; b++) |
| *base++ = (a * 5) << 12 | |
| (r * 5) << 8 | |
| (g * 5) << 4 | |
| (b * 5); |
| } |
| |
| static int sti_cursor_atomic_check(struct drm_plane *drm_plane, |
| struct drm_plane_state *state) |
| { |
| struct sti_plane *plane = to_sti_plane(drm_plane); |
| struct sti_cursor *cursor = to_sti_cursor(plane); |
| struct drm_crtc *crtc = state->crtc; |
| struct drm_framebuffer *fb = state->fb; |
| struct drm_crtc_state *crtc_state; |
| struct drm_display_mode *mode; |
| int dst_x, dst_y, dst_w, dst_h; |
| int src_w, src_h; |
| |
| /* no need for further checks if the plane is being disabled */ |
| if (!crtc || !fb) |
| return 0; |
| |
| crtc_state = drm_atomic_get_crtc_state(state->state, crtc); |
| mode = &crtc_state->mode; |
| dst_x = state->crtc_x; |
| dst_y = state->crtc_y; |
| dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x); |
| dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y); |
| /* src_x are in 16.16 format */ |
| src_w = state->src_w >> 16; |
| src_h = state->src_h >> 16; |
| |
| if (src_w < STI_CURS_MIN_SIZE || |
| src_h < STI_CURS_MIN_SIZE || |
| src_w > STI_CURS_MAX_SIZE || |
| src_h > STI_CURS_MAX_SIZE) { |
| DRM_ERROR("Invalid cursor size (%dx%d)\n", |
| src_w, src_h); |
| return -EINVAL; |
| } |
| |
| /* If the cursor size has changed, re-allocated the pixmap */ |
| if (!cursor->pixmap.base || |
| (cursor->width != src_w) || |
| (cursor->height != src_h)) { |
| cursor->width = src_w; |
| cursor->height = src_h; |
| |
| if (cursor->pixmap.base) |
| dma_free_wc(cursor->dev, cursor->pixmap.size, |
| cursor->pixmap.base, cursor->pixmap.paddr); |
| |
| cursor->pixmap.size = cursor->width * cursor->height; |
| |
| cursor->pixmap.base = dma_alloc_wc(cursor->dev, |
| cursor->pixmap.size, |
| &cursor->pixmap.paddr, |
| GFP_KERNEL | GFP_DMA); |
| if (!cursor->pixmap.base) { |
| DRM_ERROR("Failed to allocate memory for pixmap\n"); |
| return -EINVAL; |
| } |
| } |
| |
| if (!drm_fb_cma_get_gem_obj(fb, 0)) { |
| DRM_ERROR("Can't get CMA GEM object for fb\n"); |
| return -EINVAL; |
| } |
| |
| DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n", |
| crtc->base.id, sti_mixer_to_str(to_sti_mixer(crtc)), |
| drm_plane->base.id, sti_plane_to_str(plane)); |
| DRM_DEBUG_KMS("(%dx%d)@(%d,%d)\n", dst_w, dst_h, dst_x, dst_y); |
| |
| return 0; |
| } |
| |
| static void sti_cursor_atomic_update(struct drm_plane *drm_plane, |
| struct drm_plane_state *oldstate) |
| { |
| struct drm_plane_state *state = drm_plane->state; |
| struct sti_plane *plane = to_sti_plane(drm_plane); |
| struct sti_cursor *cursor = to_sti_cursor(plane); |
| struct drm_crtc *crtc = state->crtc; |
| struct drm_framebuffer *fb = state->fb; |
| struct drm_display_mode *mode; |
| int dst_x, dst_y; |
| struct drm_gem_cma_object *cma_obj; |
| u32 y, x; |
| u32 val; |
| |
| if (!crtc || !fb) |
| return; |
| |
| mode = &crtc->mode; |
| dst_x = state->crtc_x; |
| dst_y = state->crtc_y; |
| |
| cma_obj = drm_fb_cma_get_gem_obj(fb, 0); |
| |
| /* Convert ARGB8888 to CLUT8 */ |
| sti_cursor_argb8888_to_clut8(cursor, (u32 *)cma_obj->vaddr); |
| |
| /* AWS and AWE depend on the mode */ |
| y = sti_vtg_get_line_number(*mode, 0); |
| x = sti_vtg_get_pixel_number(*mode, 0); |
| val = y << 16 | x; |
| writel(val, cursor->regs + CUR_AWS); |
| y = sti_vtg_get_line_number(*mode, mode->vdisplay - 1); |
| x = sti_vtg_get_pixel_number(*mode, mode->hdisplay - 1); |
| val = y << 16 | x; |
| writel(val, cursor->regs + CUR_AWE); |
| |
| /* Set memory location, size, and position */ |
| writel(cursor->pixmap.paddr, cursor->regs + CUR_PML); |
| writel(cursor->width, cursor->regs + CUR_PMP); |
| writel(cursor->height << 16 | cursor->width, cursor->regs + CUR_SIZE); |
| |
| y = sti_vtg_get_line_number(*mode, dst_y); |
| x = sti_vtg_get_pixel_number(*mode, dst_x); |
| writel((y << 16) | x, cursor->regs + CUR_VPO); |
| |
| /* Set and fetch CLUT */ |
| writel(cursor->clut_paddr, cursor->regs + CUR_CML); |
| writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL); |
| |
| sti_plane_update_fps(plane, true, false); |
| |
| plane->status = STI_PLANE_UPDATED; |
| } |
| |
| static void sti_cursor_atomic_disable(struct drm_plane *drm_plane, |
| struct drm_plane_state *oldstate) |
| { |
| struct sti_plane *plane = to_sti_plane(drm_plane); |
| |
| if (!oldstate->crtc) { |
| DRM_DEBUG_DRIVER("drm plane:%d not enabled\n", |
| drm_plane->base.id); |
| return; |
| } |
| |
| DRM_DEBUG_DRIVER("CRTC:%d (%s) drm plane:%d (%s)\n", |
| oldstate->crtc->base.id, |
| sti_mixer_to_str(to_sti_mixer(oldstate->crtc)), |
| drm_plane->base.id, sti_plane_to_str(plane)); |
| |
| plane->status = STI_PLANE_DISABLING; |
| } |
| |
| static const struct drm_plane_helper_funcs sti_cursor_helpers_funcs = { |
| .atomic_check = sti_cursor_atomic_check, |
| .atomic_update = sti_cursor_atomic_update, |
| .atomic_disable = sti_cursor_atomic_disable, |
| }; |
| |
| static void sti_cursor_destroy(struct drm_plane *drm_plane) |
| { |
| DRM_DEBUG_DRIVER("\n"); |
| |
| drm_plane_helper_disable(drm_plane); |
| drm_plane_cleanup(drm_plane); |
| } |
| |
| static int sti_cursor_late_register(struct drm_plane *drm_plane) |
| { |
| struct sti_plane *plane = to_sti_plane(drm_plane); |
| struct sti_cursor *cursor = to_sti_cursor(plane); |
| |
| return cursor_debugfs_init(cursor, drm_plane->dev->primary); |
| } |
| |
| static const struct drm_plane_funcs sti_cursor_plane_helpers_funcs = { |
| .update_plane = drm_atomic_helper_update_plane, |
| .disable_plane = drm_atomic_helper_disable_plane, |
| .destroy = sti_cursor_destroy, |
| .set_property = drm_atomic_helper_plane_set_property, |
| .reset = sti_plane_reset, |
| .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, |
| .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, |
| .late_register = sti_cursor_late_register, |
| }; |
| |
| struct drm_plane *sti_cursor_create(struct drm_device *drm_dev, |
| struct device *dev, int desc, |
| void __iomem *baseaddr, |
| unsigned int possible_crtcs) |
| { |
| struct sti_cursor *cursor; |
| size_t size; |
| int res; |
| |
| cursor = devm_kzalloc(dev, sizeof(*cursor), GFP_KERNEL); |
| if (!cursor) { |
| DRM_ERROR("Failed to allocate memory for cursor\n"); |
| return NULL; |
| } |
| |
| /* Allocate clut buffer */ |
| size = 0x100 * sizeof(unsigned short); |
| cursor->clut = dma_alloc_wc(dev, size, &cursor->clut_paddr, |
| GFP_KERNEL | GFP_DMA); |
| |
| if (!cursor->clut) { |
| DRM_ERROR("Failed to allocate memory for cursor clut\n"); |
| goto err_clut; |
| } |
| |
| cursor->dev = dev; |
| cursor->regs = baseaddr; |
| cursor->plane.desc = desc; |
| cursor->plane.status = STI_PLANE_DISABLED; |
| |
| sti_cursor_init(cursor); |
| |
| res = drm_universal_plane_init(drm_dev, &cursor->plane.drm_plane, |
| possible_crtcs, |
| &sti_cursor_plane_helpers_funcs, |
| cursor_supported_formats, |
| ARRAY_SIZE(cursor_supported_formats), |
| NULL, DRM_PLANE_TYPE_CURSOR, NULL); |
| if (res) { |
| DRM_ERROR("Failed to initialize universal plane\n"); |
| goto err_plane; |
| } |
| |
| drm_plane_helper_add(&cursor->plane.drm_plane, |
| &sti_cursor_helpers_funcs); |
| |
| sti_plane_init_property(&cursor->plane, DRM_PLANE_TYPE_CURSOR); |
| |
| return &cursor->plane.drm_plane; |
| |
| err_plane: |
| dma_free_wc(dev, size, cursor->clut, cursor->clut_paddr); |
| err_clut: |
| devm_kfree(dev, cursor); |
| return NULL; |
| } |