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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) STMicroelectronics SA 2014
- * Authors: Vincent Abriou <vincent.abriou@st.com>
- * Fabien Dessenne <fabien.dessenne@st.com>
- * for STMicroelectronics.
- */
- #include <linux/dma-mapping.h>
- #include <linux/seq_file.h>
- #include <drm/drm_atomic.h>
- #include <drm/drm_device.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 structure
- *
- * @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_putc(s, '\n');
- return 0;
- }
- static struct drm_info_list cursor_debugfs_files[] = {
- { "cursor", cursor_dbg_show, 0, NULL },
- };
- static void 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;
- 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_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);
- cursor_debugfs_init(cursor, drm_plane->dev->primary);
- return 0;
- }
- 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,
- .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;
- }
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