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* 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 <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_plane_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)
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 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 sti_mixer *mixer = to_sti_mixer(crtc);
struct drm_framebuffer *fb = state->fb;
struct drm_display_mode *mode = &crtc->mode;
int dst_x = state->crtc_x;
int dst_y = state->crtc_y;
int dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
int dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
/* src_x are in 16.16 format */
int src_w = state->src_w >> 16;
int src_h = state->src_h >> 16;
bool first_prepare = plane->status == STI_PLANE_DISABLED ? true : false;
struct drm_gem_cma_object *cma_obj;
u32 y, x;
u32 val;
DRM_DEBUG_KMS("CRTC:%d (%s) drm plane:%d (%s)\n",
crtc->base.id, sti_mixer_to_str(mixer),
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);
dev_dbg(cursor->dev, "%s %s\n", __func__,
sti_plane_to_str(plane));
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;
}
/* 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_writecombine(cursor->dev,
cursor->pixmap.size,
cursor->pixmap.base,
cursor->pixmap.paddr);
cursor->pixmap.size = cursor->width * cursor->height;
cursor->pixmap.base = dma_alloc_writecombine(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;
}
}
cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
if (!cma_obj) {
DRM_ERROR("Can't get CMA GEM object for fb\n");
return;
}
/* 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);
if (first_prepare) {
/* Set and fetch CLUT */
writel(cursor->clut_paddr, cursor->regs + CUR_CML);
writel(CUR_CTL_CLUT_UPDATE, cursor->regs + CUR_CTL);
}
/* 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_y);
writel((y << 16) | x, cursor->regs + CUR_VPO);
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);
struct sti_mixer *mixer = to_sti_mixer(drm_plane->crtc);
if (!drm_plane->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",
drm_plane->crtc->base.id, sti_mixer_to_str(mixer),
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_update = sti_cursor_atomic_update,
.atomic_disable = sti_cursor_atomic_disable,
};
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_writecombine(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_plane_helpers_funcs,
cursor_supported_formats,
ARRAY_SIZE(cursor_supported_formats),
DRM_PLANE_TYPE_CURSOR);
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_writecombine(dev, size, cursor->clut, cursor->clut_paddr);
err_clut:
devm_kfree(dev, cursor);
return NULL;
}
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