// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics SA 2014
* Authors: Vincent Abriou <[email protected]>
* Fabien Dessenne <[email protected]>
* 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_dma_helper.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_dma_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_atomic_state *state)
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
drm_plane);
struct sti_plane *plane = to_sti_plane(drm_plane);
struct sti_cursor *cursor = to_sti_cursor(plane);
struct drm_crtc *crtc = new_plane_state->crtc;
struct drm_framebuffer *fb = new_plane_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, crtc);
mode = &crtc_state->mode;
dst_x = new_plane_state->crtc_x;
dst_y = new_plane_state->crtc_y;
dst_w = clamp_val(new_plane_state->crtc_w, 0,
mode->crtc_hdisplay - dst_x);
dst_h = clamp_val(new_plane_state->crtc_h, 0,
mode->crtc_vdisplay - dst_y);
/* src_x are in 16.16 format */
src_w = new_plane_state->src_w >> 16;
src_h = new_plane_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_dma_get_gem_obj(fb, 0)) {
DRM_ERROR("Can't get DMA 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_atomic_state *state)
{
struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state,
drm_plane);
struct sti_plane *plane = to_sti_plane(drm_plane);
struct sti_cursor *cursor = to_sti_cursor(plane);
struct drm_crtc *crtc = newstate->crtc;
struct drm_framebuffer *fb = newstate->fb;
struct drm_display_mode *mode;
int dst_x, dst_y;
struct drm_gem_dma_object *dma_obj;
u32 y, x;
u32 val;
if (!crtc || !fb)
return;
mode = &crtc->mode;
dst_x = newstate->crtc_x;
dst_y = newstate->crtc_y;
dma_obj = drm_fb_dma_get_gem_obj(fb, 0);
/* Convert ARGB8888 to CLUT8 */
sti_cursor_argb8888_to_clut8(cursor, (u32 *)dma_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_atomic_state *state)
{
struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state,
drm_plane);
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 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 = drm_plane_cleanup,
.reset = drm_atomic_helper_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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