struct diu_ad dummy_ad __aligned(8);
struct diu_ad ad[NUM_AOIS] __aligned(8);
u8 gamma[256 * 3] __aligned(32);
- u8 cursor[MAX_CURS * MAX_CURS * 2] __aligned(32);
+ /* It's easier to parse the cursor data as little-endian */
+ __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32);
+ /* Blank cursor data -- used to hide the cursor */
+ __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32);
uint8_t edid_data[EDID_LENGTH];
bool has_edid;
} __aligned(32);
/* Program DIU registers */
out_be32(&hw->gamma, DMA_ADDR(data, gamma));
- out_be32(&hw->cursor, DMA_ADDR(data, cursor));
out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */
out_be32(&hw->disp_size, (var->yres << 16) | var->xres);
#define PF_COMP_0_MASK 0x0000000F
#define PF_COMP_0_SHIFT 0
-#define MAKE_PF(alpha, red, blue, green, size, c0, c1, c2, c3) \
+#define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \
cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
(blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
(red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
switch (bits_per_pixel) {
case 32:
/* 0x88883316 */
- return MAKE_PF(3, 2, 0, 1, 3, 8, 8, 8, 8);
+ return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8);
case 24:
/* 0x88082219 */
- return MAKE_PF(4, 0, 1, 2, 2, 0, 8, 8, 8);
+ return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0);
case 16:
/* 0x65053118 */
return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
}
}
+/*
+ * Copies a cursor image from user space to the proper place in driver
+ * memory so that the hardware can display the cursor image.
+ *
+ * Cursor data is represented as a sequence of 'width' bits packed into bytes.
+ * That is, the first 8 bits are in the first byte, the second 8 bits in the
+ * second byte, and so on. Therefore, the each row of the cursor is (width +
+ * 7) / 8 bytes of 'data'
+ *
+ * The DIU only supports cursors up to 32x32 (MAX_CURS). We reject cursors
+ * larger than this, so we already know that 'width' <= 32. Therefore, we can
+ * simplify our code by using a 32-bit big-endian integer ("line") to read in
+ * a single line of pixels, and only look at the top 'width' bits of that
+ * integer.
+ *
+ * This could result in an unaligned 32-bit read. For example, if the cursor
+ * is 24x24, then the first three bytes of 'image' contain the pixel data for
+ * the top line of the cursor. We do a 32-bit read of 'image', but we look
+ * only at the top 24 bits. Then we increment 'image' by 3 bytes. The next
+ * read is unaligned. The only problem is that we might read past the end of
+ * 'image' by 1-3 bytes, but that should not cause any problems.
+ */
+static void fsl_diu_load_cursor_image(struct fb_info *info,
+ const void *image, uint16_t bg, uint16_t fg,
+ unsigned int width, unsigned int height)
+{
+ struct mfb_info *mfbi = info->par;
+ struct fsl_diu_data *data = mfbi->parent;
+ __le16 *cursor = data->cursor;
+ __le16 _fg = cpu_to_le16(fg);
+ __le16 _bg = cpu_to_le16(bg);
+ unsigned int h, w;
+
+ for (h = 0; h < height; h++) {
+ uint32_t mask = 1 << 31;
+ uint32_t line = be32_to_cpup(image);
+
+ for (w = 0; w < width; w++) {
+ cursor[w] = (line & mask) ? _fg : _bg;
+ mask >>= 1;
+ }
+
+ cursor += MAX_CURS;
+ image += DIV_ROUND_UP(width, 8);
+ }
+}
+
+/*
+ * Set a hardware cursor. The image data for the cursor is passed via the
+ * fb_cursor object.
+ */
+static int fsl_diu_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+ struct mfb_info *mfbi = info->par;
+ struct fsl_diu_data *data = mfbi->parent;
+ struct diu __iomem *hw = data->diu_reg;
+
+ if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS)
+ return -EINVAL;
+
+ /* The cursor size has changed */
+ if (cursor->set & FB_CUR_SETSIZE) {
+ /*
+ * The DIU cursor is a fixed size, so when we get this
+ * message, instead of resizing the cursor, we just clear
+ * all the image data, in expectation of new data. However,
+ * in tests this control does not appear to be normally
+ * called.
+ */
+ memset(data->cursor, 0, sizeof(data->cursor));
+ }
+
+ /* The cursor position has changed (cursor->image.dx|dy) */
+ if (cursor->set & FB_CUR_SETPOS) {
+ uint32_t xx, yy;
+
+ yy = (cursor->image.dy - info->var.yoffset) & 0x7ff;
+ xx = (cursor->image.dx - info->var.xoffset) & 0x7ff;
+
+ out_be32(&hw->curs_pos, yy << 16 | xx);
+ }
+
+ /*
+ * FB_CUR_SETIMAGE - the cursor image has changed
+ * FB_CUR_SETCMAP - the cursor colors has changed
+ * FB_CUR_SETSHAPE - the cursor bitmask has changed
+ */
+ if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) {
+ unsigned int image_size =
+ DIV_ROUND_UP(cursor->image.width, 8) * cursor->image.height;
+ unsigned int image_words =
+ DIV_ROUND_UP(image_size, sizeof(uint32_t));
+ unsigned int bg_idx = cursor->image.bg_color;
+ unsigned int fg_idx = cursor->image.fg_color;
+ uint8_t buffer[image_size];
+ uint32_t *image, *source, *mask;
+ uint16_t fg, bg;
+ unsigned int i;
+
+ if (info->state != FBINFO_STATE_RUNNING)
+ return 0;
+
+ /*
+ * Determine the size of the cursor image data. Normally,
+ * it's 8x16.
+ */
+ image_size = DIV_ROUND_UP(cursor->image.width, 8) *
+ cursor->image.height;
+
+ bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
+ ((info->cmap.green[bg_idx] & 0xf8) << 2) |
+ ((info->cmap.blue[bg_idx] & 0xf8) >> 3) |
+ 1 << 15;
+
+ fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
+ ((info->cmap.green[fg_idx] & 0xf8) << 2) |
+ ((info->cmap.blue[fg_idx] & 0xf8) >> 3) |
+ 1 << 15;
+
+ /* Use 32-bit operations on the data to improve performance */
+ image = (uint32_t *)buffer;
+ source = (uint32_t *)cursor->image.data;
+ mask = (uint32_t *)cursor->mask;
+
+ if (cursor->rop == ROP_XOR)
+ for (i = 0; i < image_words; i++)
+ image[i] = source[i] ^ mask[i];
+ else
+ for (i = 0; i < image_words; i++)
+ image[i] = source[i] & mask[i];
+
+ fsl_diu_load_cursor_image(info, image, bg, fg,
+ cursor->image.width, cursor->image.height);
+ };
+
+ /*
+ * Show or hide the cursor. The cursor data is always stored in the
+ * 'cursor' memory block, and the actual cursor position is always in
+ * the DIU's CURS_POS register. To hide the cursor, we redirect the
+ * CURSOR register to a blank cursor. The show the cursor, we
+ * redirect the CURSOR register to the real cursor data.
+ */
+ if (cursor->enable)
+ out_be32(&hw->cursor, DMA_ADDR(data, cursor));
+ else
+ out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor));
+
+ return 0;
+}
+
/*
* Using the fb_var_screeninfo in fb_info we set the resolution of this
* particular framebuffer. This function alters the fb_fix_screeninfo stored
return 0;
}
+static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data)
+{
+ u32 int_mask = INT_UNDRUN; /* enable underrun detection */
+
+ if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
+ int_mask |= INT_VSYNC; /* enable vertical sync */
+
+ clrbits32(&data->diu_reg->int_mask, int_mask);
+}
+
/* turn on fb if count == 1
*/
static int fsl_diu_open(struct fb_info *info, int user)
if (res < 0)
mfbi->count--;
else {
- struct fsl_diu_data *data = mfbi->parent;
-
-#ifdef CONFIG_NOT_COHERENT_CACHE
- /*
- * Enable underrun detection and vertical sync
- * interrupts.
- */
- clrbits32(&data->diu_reg->int_mask,
- INT_UNDRUN | INT_VSYNC);
-#else
- /* Enable underrun detection */
- clrbits32(&data->diu_reg->int_mask, INT_UNDRUN);
-#endif
+ fsl_diu_enable_interrupts(mfbi->parent);
fsl_diu_enable_panel(info);
}
}
mfbi->count--;
if (mfbi->count == 0) {
struct fsl_diu_data *data = mfbi->parent;
+ bool disable = true;
+ int i;
- /* Disable interrupts */
- out_be32(&data->diu_reg->int_mask, 0xffffffff);
+ /* Disable interrupts only if all AOIs are closed */
+ for (i = 0; i < NUM_AOIS; i++) {
+ struct mfb_info *mi = data->fsl_diu_info[i].par;
+
+ if (mi->count)
+ disable = false;
+ }
+ if (disable)
+ out_be32(&data->diu_reg->int_mask, 0xffffffff);
fsl_diu_disable_panel(info);
}
.fb_ioctl = fsl_diu_ioctl,
.fb_open = fsl_diu_open,
.fb_release = fsl_diu_release,
+ .fb_cursor = fsl_diu_cursor,
};
static int install_fb(struct fb_info *info)
out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
- for (i = 0; i < NUM_AOIS; i++) {
- ret = install_fb(&data->fsl_diu_info[i]);
- if (ret) {
- dev_err(&pdev->dev, "could not register fb %d\n", i);
- goto error;
- }
- }
-
/*
* Older versions of U-Boot leave interrupts enabled, so disable
* all of them and clear the status register.
in_be32(&data->diu_reg->int_status);
ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
- &data->diu_reg);
+ data->diu_reg);
if (ret) {
dev_err(&pdev->dev, "could not claim irq\n");
goto error;
}
+ for (i = 0; i < NUM_AOIS; i++) {
+ ret = install_fb(&data->fsl_diu_info[i]);
+ if (ret) {
+ dev_err(&pdev->dev, "could not register fb %d\n", i);
+ free_irq(data->irq, data->diu_reg);
+ goto error;
+ }
+ }
+
sysfs_attr_init(&data->dev_attr.attr);
data->dev_attr.attr.name = "monitor";
data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
data = dev_get_drvdata(&pdev->dev);
disable_lcdc(&data->fsl_diu_info[0]);
- free_irq(data->irq, &data->diu_reg);
+ free_irq(data->irq, data->diu_reg);
for (i = 0; i < NUM_AOIS; i++)
uninstall_fb(&data->fsl_diu_info[i]);
projects / cascardo / linux.git / blobdiff