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-rw-r--r--MAINTAINERS6
-rw-r--r--drivers/video/fsl-diu-fb.c201
-rw-r--r--include/linux/fsl-diu-fb.h9
3 files changed, 135 insertions, 81 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index 9386a63ea8f6..477a20fc3436 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3108,6 +3108,12 @@ F: drivers/video/
F: include/video/
F: include/linux/fb.h
+FREESCALE DIU FRAMEBUFFER DRIVER
+M: Timur Tabi <timur@freescale.com>
+L: linux-fbdev@vger.kernel.org
+S: Supported
+F: drivers/video/fsl-diu-fb.*
+
FREESCALE DMA DRIVER
M: Li Yang <leoli@freescale.com>
M: Zhang Wei <zw@zh-kernel.org>
diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index ede9e55413f8..d3fc92eaee89 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -337,13 +337,11 @@ struct mfb_info {
int registered;
unsigned long pseudo_palette[16];
struct diu_ad *ad;
- int cursor_reset;
unsigned char g_alpha;
unsigned int count;
int x_aoi_d; /* aoi display x offset to physical screen */
int y_aoi_d; /* aoi display y offset to physical screen */
struct fsl_diu_data *parent;
- u8 *edid_data;
};
/**
@@ -378,6 +376,8 @@ struct fsl_diu_data {
struct diu_ad ad[NUM_AOIS] __aligned(8);
u8 gamma[256 * 3] __aligned(32);
u8 cursor[MAX_CURS * MAX_CURS * 2] __aligned(32);
+ uint8_t edid_data[EDID_LENGTH];
+ bool has_edid;
} __aligned(32);
/* Determine the DMA address of a member of the fsl_diu_data structure */
@@ -430,6 +430,22 @@ static struct mfb_info mfb_template[] = {
},
};
+#ifdef DEBUG
+static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
+{
+ mb();
+ pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x pallete=%08x "
+ "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
+ "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
+ "thresholds=%08x int_mask=%08x plut=%08x\n",
+ hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
+ hw->pallete, hw->cursor, hw->curs_pos, hw->diu_mode,
+ hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
+ hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
+ rmb();
+}
+#endif
+
/**
* fsl_diu_name_to_port - convert a port name to a monitor port enum
*
@@ -481,8 +497,7 @@ static void fsl_diu_enable_panel(struct fb_info *info)
switch (mfbi->index) {
case PLANE0:
- if (hw->desc[0] != ad->paddr)
- wr_reg_wa(&hw->desc[0], ad->paddr);
+ wr_reg_wa(&hw->desc[0], ad->paddr);
break;
case PLANE1_AOI0:
cmfbi = &data->mfb[2];
@@ -534,8 +549,7 @@ static void fsl_diu_disable_panel(struct fb_info *info)
switch (mfbi->index) {
case PLANE0:
- if (hw->desc[0] != data->dummy_ad.paddr)
- wr_reg_wa(&hw->desc[0], data->dummy_ad.paddr);
+ wr_reg_wa(&hw->desc[0], 0);
break;
case PLANE1_AOI0:
cmfbi = &data->mfb[2];
@@ -792,7 +806,8 @@ static void update_lcdc(struct fb_info *info)
hw = data->diu_reg;
- diu_ops.set_monitor_port(data->monitor_port);
+ if (diu_ops.set_monitor_port)
+ diu_ops.set_monitor_port(data->monitor_port);
gamma_table_base = data->gamma;
/* Prep for DIU init - gamma table, cursor table */
@@ -811,12 +826,8 @@ static void update_lcdc(struct fb_info *info)
out_be32(&hw->gamma, DMA_ADDR(data, gamma));
out_be32(&hw->cursor, DMA_ADDR(data, cursor));
- out_be32(&hw->bgnd, 0x007F7F7F); /* BGND */
- out_be32(&hw->bgnd_wb, 0); /* BGND_WB */
- out_be32(&hw->disp_size, (var->yres << 16 | var->xres));
- /* DISP SIZE */
- out_be32(&hw->wb_size, 0); /* WB SIZE */
- out_be32(&hw->wb_mem_addr, 0); /* WB MEM ADDR */
+ out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */
+ out_be32(&hw->disp_size, (var->yres << 16) | var->xres);
/* Horizontal and vertical configuration register */
temp = var->left_margin << 22 | /* BP_H */
@@ -833,9 +844,20 @@ static void update_lcdc(struct fb_info *info)
diu_ops.set_pixel_clock(var->pixclock);
- out_be32(&hw->syn_pol, 0); /* SYNC SIGNALS POLARITY */
- out_be32(&hw->int_status, 0); /* INTERRUPT STATUS */
+#ifndef CONFIG_PPC_MPC512x
+ /*
+ * The PLUT register is defined differently on the MPC5121 than it
+ * is on other SOCs. Unfortunately, there's no documentation that
+ * explains how it's supposed to be programmed, so for now, we leave
+ * it at the default value on the MPC5121.
+ *
+ * For other SOCs, program it for the highest priority, which will
+ * reduce the chance of underrun. Technically, we should scale the
+ * priority to match the screen resolution, but doing that properly
+ * requires delicate fine-tuning for each use-case.
+ */
out_be32(&hw->plut, 0x01F5F666);
+#endif
/* Enable the DIU */
enable_lcdc(info);
@@ -965,7 +987,6 @@ static int fsl_diu_set_par(struct fb_info *info)
hw = data->diu_reg;
set_fix(info);
- mfbi->cursor_reset = 1;
len = info->var.yres_virtual * info->fix.line_length;
/* Alloc & dealloc each time resolution/bpp change */
@@ -1107,6 +1128,12 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
if (!arg)
return -EINVAL;
+
+ dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
+ _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
+ _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
+ _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
+
switch (cmd) {
case MFB_SET_PIXFMT_OLD:
dev_warn(info->dev,
@@ -1180,6 +1207,23 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
ad->ckmin_b = ck.blue_min;
}
break;
+#ifdef CONFIG_PPC_MPC512x
+ case MFB_SET_GAMMA: {
+ struct fsl_diu_data *data = mfbi->parent;
+
+ if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
+ return -EFAULT;
+ setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
+ break;
+ }
+ case MFB_GET_GAMMA: {
+ struct fsl_diu_data *data = mfbi->parent;
+
+ if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
+ return -EFAULT;
+ break;
+ }
+#endif
default:
dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
return -ENOIOCTLCMD;
@@ -1206,8 +1250,22 @@ static int fsl_diu_open(struct fb_info *info, int user)
res = fsl_diu_set_par(info);
if (res < 0)
mfbi->count--;
- else
+ 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_panel(info);
+ }
}
spin_unlock(&diu_lock);
@@ -1223,8 +1281,13 @@ static int fsl_diu_release(struct fb_info *info, int user)
spin_lock(&diu_lock);
mfbi->count--;
- if (mfbi->count == 0)
+ if (mfbi->count == 0) {
+ struct fsl_diu_data *data = mfbi->parent;
+
+ /* Disable interrupts */
+ out_be32(&data->diu_reg->int_mask, 0xffffffff);
fsl_diu_disable_panel(info);
+ }
spin_unlock(&diu_lock);
return res;
@@ -1248,6 +1311,7 @@ static int __devinit install_fb(struct fb_info *info)
{
int rc;
struct mfb_info *mfbi = info->par;
+ struct fsl_diu_data *data = mfbi->parent;
const char *aoi_mode, *init_aoi_mode = "320x240";
struct fb_videomode *db = fsl_diu_mode_db;
unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
@@ -1264,9 +1328,9 @@ static int __devinit install_fb(struct fb_info *info)
return rc;
if (mfbi->index == PLANE0) {
- if (mfbi->edid_data) {
+ if (data->has_edid) {
/* Now build modedb from EDID */
- fb_edid_to_monspecs(mfbi->edid_data, &info->monspecs);
+ fb_edid_to_monspecs(data->edid_data, &info->monspecs);
fb_videomode_to_modelist(info->monspecs.modedb,
info->monspecs.modedb_len,
&info->modelist);
@@ -1284,7 +1348,7 @@ static int __devinit install_fb(struct fb_info *info)
* For plane 0 we continue and look into
* driver's internal modedb.
*/
- if ((mfbi->index == PLANE0) && mfbi->edid_data)
+ if ((mfbi->index == PLANE0) && data->has_edid)
has_default_mode = 0;
else
return -EINVAL;
@@ -1348,9 +1412,6 @@ static void uninstall_fb(struct fb_info *info)
if (!mfbi->registered)
return;
- if (mfbi->index == PLANE0)
- kfree(mfbi->edid_data);
-
unregister_framebuffer(info);
unmap_video_memory(info);
if (&info->cmap)
@@ -1362,7 +1423,7 @@ static void uninstall_fb(struct fb_info *info)
static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
{
struct diu __iomem *hw = dev_id;
- unsigned int status = in_be32(&hw->int_status);
+ uint32_t status = in_be32(&hw->int_status);
if (status) {
/* This is the workaround for underrun */
@@ -1387,40 +1448,6 @@ static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
return IRQ_NONE;
}
-static int request_irq_local(struct fsl_diu_data *data)
-{
- struct diu __iomem *hw = data->diu_reg;
- u32 ints;
- int ret;
-
- /* Read to clear the status */
- in_be32(&hw->int_status);
-
- ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb", hw);
- if (!ret) {
- ints = INT_PARERR | INT_LS_BF_VS;
-#if !defined(CONFIG_NOT_COHERENT_CACHE)
- ints |= INT_VSYNC;
-#endif
-
- /* Read to clear the status */
- in_be32(&hw->int_status);
- out_be32(&hw->int_mask, ints);
- }
-
- return ret;
-}
-
-static void free_irq_local(struct fsl_diu_data *data)
-{
- struct diu __iomem *hw = data->diu_reg;
-
- /* Disable all LCDC interrupt */
- out_be32(&hw->int_mask, 0x1f);
-
- free_irq(data->irq, NULL);
-}
-
#ifdef CONFIG_PM
/*
* Power management hooks. Note that we won't be called from IRQ context,
@@ -1496,8 +1523,8 @@ static int __devinit fsl_diu_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct mfb_info *mfbi;
struct fsl_diu_data *data;
- int diu_mode;
dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
+ const void *prop;
unsigned int i;
int ret;
@@ -1541,17 +1568,13 @@ static int __devinit fsl_diu_probe(struct platform_device *pdev)
memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
mfbi->parent = data;
mfbi->ad = &data->ad[i];
+ }
- if (mfbi->index == PLANE0) {
- const u8 *prop;
- int len;
-
- /* Get EDID */
- prop = of_get_property(np, "edid", &len);
- if (prop && len == EDID_LENGTH)
- mfbi->edid_data = kmemdup(prop, EDID_LENGTH,
- GFP_KERNEL);
- }
+ /* Get the EDID data from the device tree, if present */
+ prop = of_get_property(np, "edid", &ret);
+ if (prop && ret == EDID_LENGTH) {
+ memcpy(data->edid_data, prop, EDID_LENGTH);
+ data->has_edid = true;
}
data->diu_reg = of_iomap(np, 0);
@@ -1561,10 +1584,6 @@ static int __devinit fsl_diu_probe(struct platform_device *pdev)
goto error;
}
- diu_mode = in_be32(&data->diu_reg->diu_mode);
- if (diu_mode == MFB_MODE0)
- out_be32(&data->diu_reg->diu_mode, 0); /* disable DIU */
-
/* Get the IRQ of the DIU */
data->irq = irq_of_parse_and_map(np, 0);
@@ -1586,11 +1605,11 @@ static int __devinit fsl_diu_probe(struct platform_device *pdev)
data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
/*
- * Let DIU display splash screen if it was pre-initialized
- * by the bootloader, set dummy area descriptor otherwise.
+ * Let DIU continue to display splash screen if it was pre-initialized
+ * by the bootloader; otherwise, clear the display.
*/
- if (diu_mode == MFB_MODE0)
- out_be32(&data->diu_reg->desc[0], data->dummy_ad.paddr);
+ if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
+ out_be32(&data->diu_reg->desc[0], 0);
out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
@@ -1603,7 +1622,16 @@ static int __devinit fsl_diu_probe(struct platform_device *pdev)
}
}
- if (request_irq_local(data)) {
+ /*
+ * Older versions of U-Boot leave interrupts enabled, so disable
+ * all of them and clear the status register.
+ */
+ out_be32(&data->diu_reg->int_mask, 0xffffffff);
+ in_be32(&data->diu_reg->int_status);
+
+ ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
+ &data->diu_reg);
+ if (ret) {
dev_err(&pdev->dev, "could not claim irq\n");
goto error;
}
@@ -1638,7 +1666,8 @@ static int fsl_diu_remove(struct platform_device *pdev)
data = dev_get_drvdata(&pdev->dev);
disable_lcdc(&data->fsl_diu_info[0]);
- free_irq_local(data);
+
+ free_irq(data->irq, &data->diu_reg);
for (i = 0; i < NUM_AOIS; i++)
uninstall_fb(&data->fsl_diu_info[i]);
@@ -1741,6 +1770,9 @@ static int __init fsl_diu_init(void)
coherence_data_size = be32_to_cpup(prop) * 13;
coherence_data_size /= 8;
+ pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
+ coherence_data_size);
+
prop = of_get_property(np, "d-cache-line-size", NULL);
if (prop == NULL) {
pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
@@ -1750,10 +1782,17 @@ static int __init fsl_diu_init(void)
}
d_cache_line_size = be32_to_cpup(prop);
+ pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
+ d_cache_line_size);
+
of_node_put(np);
coherence_data = vmalloc(coherence_data_size);
- if (!coherence_data)
+ if (!coherence_data) {
+ pr_err("fsl-diu-fb: could not allocate coherence data "
+ "(size=%zu)\n", coherence_data_size);
return -ENOMEM;
+ }
+
#endif
ret = platform_driver_register(&fsl_diu_driver);
diff --git a/include/linux/fsl-diu-fb.h b/include/linux/fsl-diu-fb.h
index 11c16a1fb9e3..a1e8277120c7 100644
--- a/include/linux/fsl-diu-fb.h
+++ b/include/linux/fsl-diu-fb.h
@@ -47,6 +47,15 @@ struct aoi_display_offset {
#define MFB_GET_PIXFMT _IOR('M', 8, __u32)
/*
+ * The MPC5121 BSP comes with a gamma_set utility that initializes the
+ * gamma table. Unfortunately, it uses bad values for the IOCTL commands,
+ * but there's nothing we can do about it now. These ioctls are only
+ * supported on the MPC5121.
+ */
+#define MFB_SET_GAMMA _IOW('M', 1, __u8)
+#define MFB_GET_GAMMA _IOR('M', 1, __u8)
+
+/*
* The original definitions of MFB_SET_PIXFMT and MFB_GET_PIXFMT used the
* wrong value for 'size' field of the ioctl. The current macros above use the
* right size, but we still need to provide backwards compatibility, at least
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 22:56:10 +0000