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openwrt/target/linux/brcm2708/patches-4.14/950-0297-Cleanup-of-bcm2708...

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From dc1c33574c4dcf24192cb219ea6caaf2c7804eef Mon Sep 17 00:00:00 2001
From: James Hughes <james.hughes@raspberrypi.org>
Date: Thu, 10 May 2018 11:34:38 +0100
Subject: [PATCH 297/454] Cleanup of bcm2708_fb file to kernel coding standards
Some minor change to function - remove a use of
in_atomic, plus replacing various debug messages
that manually specify the function name with
("%s",.__func__)
Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
---
drivers/video/fbdev/bcm2708_fb.c | 136 ++++++++++++++++++-------------
1 file changed, 81 insertions(+), 55 deletions(-)
--- a/drivers/video/fbdev/bcm2708_fb.c
+++ b/drivers/video/fbdev/bcm2708_fb.c
@@ -41,9 +41,10 @@
#define MODULE_NAME "bcm2708_fb"
#ifdef BCM2708_FB_DEBUG
-#define print_debug(fmt,...) pr_debug("%s:%s:%d: "fmt, MODULE_NAME, __func__, __LINE__, ##__VA_ARGS__)
+#define print_debug(fmt, ...) pr_debug("%s:%s:%d: "fmt, \
+ MODULE_NAME, __func__, __LINE__, ##__VA_ARGS__)
#else
-#define print_debug(fmt,...)
+#define print_debug(fmt, ...)
#endif
/* This is limited to 16 characters when displayed by X startup */
@@ -51,10 +52,10 @@ static const char *bcm2708_name = "BCM27
#define DRIVER_NAME "bcm2708_fb"
-static int fbwidth = 800; /* module parameter */
-static int fbheight = 480; /* module parameter */
-static int fbdepth = 32; /* module parameter */
-static int fbswap = 0; /* module parameter */
+static int fbwidth = 800; /* module parameter */
+static int fbheight = 480; /* module parameter */
+static int fbdepth = 32; /* module parameter */
+static int fbswap; /* module parameter */
static u32 dma_busy_wait_threshold = 1<<15;
module_param(dma_busy_wait_threshold, int, 0644);
@@ -221,11 +222,13 @@ static int bcm2708_fb_check_var(struct f
struct fb_info *info)
{
/* info input, var output */
- print_debug("bcm2708_fb_check_var info(%p) %dx%d (%dx%d), %d, %d\n", info,
+ print_debug("%s(%p) %dx%d (%dx%d), %d, %d\n",
+ __func__,
+ info,
info->var.xres, info->var.yres, info->var.xres_virtual,
info->var.yres_virtual, (int)info->screen_size,
info->var.bits_per_pixel);
- print_debug("bcm2708_fb_check_var var(%p) %dx%d (%dx%d), %d\n", var,
+ print_debug("%s(%p) %dx%d (%dx%d), %d\n", __func__, var,
var->xres, var->yres, var->xres_virtual, var->yres_virtual,
var->bits_per_pixel);
@@ -233,7 +236,7 @@ static int bcm2708_fb_check_var(struct f
var->bits_per_pixel = 16;
if (bcm2708_fb_set_bitfields(var) != 0) {
- pr_err("bcm2708_fb_check_var: invalid bits_per_pixel %d\n",
+ pr_err("%s: invalid bits_per_pixel %d\n", __func__,
var->bits_per_pixel);
return -EINVAL;
}
@@ -245,9 +248,8 @@ static int bcm2708_fb_check_var(struct f
if (var->yres_virtual == -1) {
var->yres_virtual = 480;
- pr_err
- ("bcm2708_fb_check_var: virtual resolution set to maximum of %dx%d\n",
- var->xres_virtual, var->yres_virtual);
+ pr_err("%s: virtual resolution set to maximum of %dx%d\n",
+ __func__, var->xres_virtual, var->yres_virtual);
}
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
@@ -291,7 +293,7 @@ static int bcm2708_fb_set_par(struct fb_
};
int ret;
- print_debug("bcm2708_fb_set_par info(%p) %dx%d (%dx%d), %d, %d\n", info,
+ print_debug("%s(%p) %dx%d (%dx%d), %d, %d\n", __func__, info,
info->var.xres, info->var.yres, info->var.xres_virtual,
info->var.yres_virtual, (int)info->screen_size,
info->var.bits_per_pixel);
@@ -326,11 +328,12 @@ static int bcm2708_fb_set_par(struct fb_
return -ENOMEM;
}
- print_debug
- ("BCM2708FB: start = %p,%p width=%d, height=%d, bpp=%d, pitch=%d size=%d\n",
- (void *)fb->fb.screen_base, (void *)fb->fb_bus_address,
- fbinfo.xres, fbinfo.yres, fbinfo.bpp,
- fbinfo.pitch, (int)fb->fb.screen_size);
+ print_debug(
+ "%s: start = %p,%p width=%d, height=%d, bpp=%d, pitch=%d size=%d\n",
+ __func__,
+ (void *)fb->fb.screen_base, (void *)fb->fb_bus_address,
+ fbinfo.xres, fbinfo.yres, fbinfo.bpp,
+ fbinfo.pitch, (int)fb->fb.screen_size);
return 0;
}
@@ -349,7 +352,6 @@ static int bcm2708_fb_setcolreg(unsigned
{
struct bcm2708_fb *fb = to_bcm2708(info);
- /*print_debug("BCM2708FB: setcolreg %d:(%02x,%02x,%02x,%02x) %x\n", regno, red, green, blue, transp, fb->fb.fix.visual);*/
if (fb->fb.var.bits_per_pixel <= 8) {
if (regno < 256) {
/* blue [23:16], green [15:8], red [7:0] */
@@ -357,8 +359,12 @@ static int bcm2708_fb_setcolreg(unsigned
((green >> 8) & 0xff) << 8 |
((blue >> 8) & 0xff) << 16;
}
- /* Hack: we need to tell GPU the palette has changed, but currently bcm2708_fb_set_par takes noticable time when called for every (256) colour */
- /* So just call it for what looks like the last colour in a list for now. */
+ /* Hack: we need to tell GPU the palette has changed, but
+ * currently bcm2708_fb_set_par takes noticeable time when
+ * called for every (256) colour
+ * So just call it for what looks like the last colour in a
+ * list for now.
+ */
if (regno == 15 || regno == 255) {
struct packet {
u32 offset;
@@ -372,19 +378,23 @@ static int bcm2708_fb_setcolreg(unsigned
return -ENOMEM;
packet->offset = 0;
packet->length = regno + 1;
- memcpy(packet->cmap, fb->gpu_cmap, sizeof(packet->cmap));
- ret = rpi_firmware_property(fb->fw, RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE,
- packet, (2 + packet->length) * sizeof(u32));
+ memcpy(packet->cmap, fb->gpu_cmap,
+ sizeof(packet->cmap));
+ ret = rpi_firmware_property(fb->fw,
+ RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE,
+ packet,
+ (2 + packet->length) * sizeof(u32));
if (ret || packet->offset)
- dev_err(info->device, "Failed to set palette (%d,%u)\n",
+ dev_err(info->device,
+ "Failed to set palette (%d,%u)\n",
ret, packet->offset);
kfree(packet);
}
- } else if (regno < 16) {
+ } else if (regno < 16) {
fb->cmap[regno] = convert_bitfield(transp, &fb->fb.var.transp) |
- convert_bitfield(blue, &fb->fb.var.blue) |
- convert_bitfield(green, &fb->fb.var.green) |
- convert_bitfield(red, &fb->fb.var.red);
+ convert_bitfield(blue, &fb->fb.var.blue) |
+ convert_bitfield(green, &fb->fb.var.green) |
+ convert_bitfield(red, &fb->fb.var.red);
}
return regno > 255;
}
@@ -412,24 +422,28 @@ static int bcm2708_fb_blank(int blank_mo
ret = rpi_firmware_property(fb->fw, RPI_FIRMWARE_FRAMEBUFFER_BLANK,
&value, sizeof(value));
if (ret)
- dev_err(info->device, "bcm2708_fb_blank(%d) failed: %d\n",
+ dev_err(info->device, "%s(%d) failed: %d\n", __func__,
blank_mode, ret);
return ret;
}
-static int bcm2708_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+static int bcm2708_fb_pan_display(struct fb_var_screeninfo *var,
+ struct fb_info *info)
{
s32 result;
+
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
result = bcm2708_fb_set_par(info);
if (result != 0)
- pr_err("bcm2708_fb_pan_display(%d,%d) returns=%d\n", var->xoffset, var->yoffset, result);
+ pr_err("%s(%d,%d) returns=%d\n", __func__,
+ var->xoffset, var->yoffset, result);
return result;
}
-static void dma_memcpy(struct bcm2708_fb *fb, dma_addr_t dst, dma_addr_t src, int size)
+static void dma_memcpy(struct bcm2708_fb *fb, dma_addr_t dst, dma_addr_t src,
+ int size)
{
int burst_size = (fb->dma_chan == 0) ? 8 : 2;
struct bcm2708_dma_cb *cb = fb->cb_base;
@@ -450,6 +464,7 @@ static void dma_memcpy(struct bcm2708_fb
bcm_dma_wait_idle(fb->dma_chan_base);
} else {
void __iomem *dma_chan = fb->dma_chan_base;
+
cb->info |= BCM2708_DMA_INT_EN;
bcm_dma_start(fb->dma_chan_base, fb->cb_handle);
while (bcm_dma_is_busy(dma_chan)) {
@@ -462,8 +477,10 @@ static void dma_memcpy(struct bcm2708_fb
fb->stats.dma_copies++;
}
-#define INTALIAS_NORMAL(x) ((x)&~0xc0000000) // address with no aliases
-#define INTALIAS_L1L2_NONALLOCATING(x) (((x)&~0xc0000000)|0x80000000) // cache coherent but non-allocating in L1 and L2
+/* address with no aliases */
+#define INTALIAS_NORMAL(x) ((x)&~0xc0000000)
+/* cache coherent but non-allocating in L1 and L2 */
+#define INTALIAS_L1L2_NONALLOCATING(x) (((x)&~0xc0000000)|0x80000000)
static long vc_mem_copy(struct bcm2708_fb *fb, unsigned long arg)
{
@@ -475,8 +492,7 @@ static long vc_mem_copy(struct bcm2708_f
size_t offset;
/* restrict this to root user */
- if (!uid_eq(current_euid(), GLOBAL_ROOT_UID))
- {
+ if (!uid_eq(current_euid(), GLOBAL_ROOT_UID)) {
rc = -EFAULT;
goto out;
}
@@ -492,12 +508,16 @@ static long vc_mem_copy(struct bcm2708_f
}
if (fb->gpu.base == 0 || fb->gpu.length == 0) {
- pr_err("[%s]: Unable to determine gpu memory (%x,%x)\n", __func__, fb->gpu.base, fb->gpu.length);
+ pr_err("[%s]: Unable to determine gpu memory (%x,%x)\n",
+ __func__, fb->gpu.base, fb->gpu.length);
return -EFAULT;
}
- if (INTALIAS_NORMAL(ioparam.src) < fb->gpu.base || INTALIAS_NORMAL(ioparam.src) >= fb->gpu.base + fb->gpu.length) {
- pr_err("[%s]: Invalid memory access %x (%x-%x)", __func__, INTALIAS_NORMAL(ioparam.src), fb->gpu.base, fb->gpu.base + fb->gpu.length);
+ if (INTALIAS_NORMAL(ioparam.src) < fb->gpu.base ||
+ INTALIAS_NORMAL(ioparam.src) >= fb->gpu.base + fb->gpu.length) {
+ pr_err("[%s]: Invalid memory access %x (%x-%x)", __func__,
+ INTALIAS_NORMAL(ioparam.src), fb->gpu.base,
+ fb->gpu.base + fb->gpu.length);
return -EFAULT;
}
@@ -515,7 +535,9 @@ static long vc_mem_copy(struct bcm2708_f
size_t s = min(size, remaining);
unsigned char *p = (unsigned char *)ioparam.src + offset;
unsigned char *q = (unsigned char *)ioparam.dst + offset;
- dma_memcpy(fb, bus_addr, INTALIAS_L1L2_NONALLOCATING((dma_addr_t)p), size);
+
+ dma_memcpy(fb, bus_addr,
+ INTALIAS_L1L2_NONALLOCATING((dma_addr_t)p), size);
if (copy_to_user(q, buf, s) != 0) {
pr_err("[%s]: failed to copy-to-user\n",
__func__);
@@ -525,11 +547,13 @@ static long vc_mem_copy(struct bcm2708_f
}
out:
if (buf)
- dma_free_coherent(fb->fb.device, PAGE_ALIGN(size), buf, bus_addr);
+ dma_free_coherent(fb->fb.device, PAGE_ALIGN(size), buf,
+ bus_addr);
return rc;
}
-static int bcm2708_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+static int bcm2708_ioctl(struct fb_info *info, unsigned int cmd,
+ unsigned long arg)
{
struct bcm2708_fb *fb = to_bcm2708(info);
u32 dummy = 0;
@@ -593,13 +617,13 @@ static void bcm2708_fb_copyarea(struct f
struct bcm2708_fb *fb = to_bcm2708(info);
struct bcm2708_dma_cb *cb = fb->cb_base;
int bytes_per_pixel = (info->var.bits_per_pixel + 7) >> 3;
+
/* Channel 0 supports larger bursts and is a bit faster */
int burst_size = (fb->dma_chan == 0) ? 8 : 2;
int pixels = region->width * region->height;
/* Fallback to cfb_copyarea() if we don't like something */
- if (in_atomic() ||
- bytes_per_pixel > 4 ||
+ if (bytes_per_pixel > 4 ||
info->var.xres * info->var.yres > 1920 * 1200 ||
region->width <= 0 || region->width > info->var.xres ||
region->height <= 0 || region->height > info->var.yres ||
@@ -663,6 +687,7 @@ static void bcm2708_fb_copyarea(struct f
} else {
/* A single dma control block is enough. */
int sy, dy, stride;
+
if (region->dy <= region->sy) {
/* processing from top to bottom */
dy = region->dy;
@@ -694,6 +719,7 @@ static void bcm2708_fb_copyarea(struct f
bcm_dma_wait_idle(fb->dma_chan_base);
} else {
void __iomem *dma_chan = fb->dma_chan_base;
+
cb->info |= BCM2708_DMA_INT_EN;
bcm_dma_start(fb->dma_chan_base, fb->cb_handle);
while (bcm_dma_is_busy(dma_chan)) {
@@ -791,8 +817,8 @@ static int bcm2708_fb_register(struct bc
if (ret)
return ret;
- print_debug("BCM2708FB: registering framebuffer (%dx%d@%d) (%d)\n", fbwidth,
- fbheight, fbdepth, fbswap);
+ print_debug("BCM2708FB: registering framebuffer (%dx%d@%d) (%d)\n",
+ fbwidth, fbheight, fbdepth, fbswap);
ret = register_framebuffer(&fb->fb);
print_debug("BCM2708FB: register framebuffer (%d)\n", ret);
@@ -813,19 +839,17 @@ static int bcm2708_fb_probe(struct platf
fw_np = of_parse_phandle(dev->dev.of_node, "firmware", 0);
/* Remove comment when booting without Device Tree is no longer supported
- if (!fw_np) {
- dev_err(&dev->dev, "Missing firmware node\n");
- return -ENOENT;
- }
-*/
+ * if (!fw_np) {
+ * dev_err(&dev->dev, "Missing firmware node\n");
+ * return -ENOENT;
+ * }
+ */
fw = rpi_firmware_get(fw_np);
if (!fw)
return -EPROBE_DEFER;
fb = kzalloc(sizeof(struct bcm2708_fb), GFP_KERNEL);
if (!fb) {
- dev_err(&dev->dev,
- "could not allocate new bcm2708_fb struct\n");
ret = -ENOMEM;
goto free_region;
}
@@ -866,7 +890,9 @@ static int bcm2708_fb_probe(struct platf
fb->dev = dev;
fb->fb.device = &dev->dev;
- // failure here isn't fatal, but we'll fail in vc_mem_copy if fb->gpu is not valid
+ /* failure here isn't fatal, but we'll fail in vc_mem_copy if
+ * fb->gpu is not valid
+ */
rpi_firmware_property(fb->fw,
RPI_FIRMWARE_GET_VC_MEMORY,
&fb->gpu, sizeof(fb->gpu));
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