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path: root/drivers/video/auo_k190x.c
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Diffstat (limited to 'drivers/video/auo_k190x.c')
-rw-r--r--drivers/video/auo_k190x.c235
1 files changed, 194 insertions, 41 deletions
diff --git a/drivers/video/auo_k190x.c b/drivers/video/auo_k190x.c
index 53846cb534d4..b1f19b266da7 100644
--- a/drivers/video/auo_k190x.c
+++ b/drivers/video/auo_k190x.c
@@ -40,6 +40,14 @@ static struct panel_info panel_table[] = {
.w = 1024,
.h = 768,
},
+ [AUOK190X_RESOLUTION_600_800] = {
+ .w = 600,
+ .h = 800,
+ },
+ [AUOK190X_RESOLUTION_768_1024] = {
+ .w = 768,
+ .h = 1024,
+ },
};
/*
@@ -60,8 +68,48 @@ static void auok190x_issue_cmd(struct auok190xfb_par *par, u16 data)
par->board->set_ctl(par, AUOK190X_I80_DC, 1);
}
-static int auok190x_issue_pixels(struct auok190xfb_par *par, int size,
- u16 *data)
+/**
+ * Conversion of 16bit color to 4bit grayscale
+ * does roughly (0.3 * R + 0.6 G + 0.1 B) / 2
+ */
+static inline int rgb565_to_gray4(u16 data, struct fb_var_screeninfo *var)
+{
+ return ((((data & 0xF800) >> var->red.offset) * 77 +
+ ((data & 0x07E0) >> (var->green.offset + 1)) * 151 +
+ ((data & 0x1F) >> var->blue.offset) * 28) >> 8 >> 1);
+}
+
+static int auok190x_issue_pixels_rgb565(struct auok190xfb_par *par, int size,
+ u16 *data)
+{
+ struct fb_var_screeninfo *var = &par->info->var;
+ struct device *dev = par->info->device;
+ int i;
+ u16 tmp;
+
+ if (size & 7) {
+ dev_err(dev, "issue_pixels: size %d must be a multiple of 8\n",
+ size);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < (size >> 2); i++) {
+ par->board->set_ctl(par, AUOK190X_I80_WR, 0);
+
+ tmp = (rgb565_to_gray4(data[4*i], var) & 0x000F);
+ tmp |= (rgb565_to_gray4(data[4*i+1], var) << 4) & 0x00F0;
+ tmp |= (rgb565_to_gray4(data[4*i+2], var) << 8) & 0x0F00;
+ tmp |= (rgb565_to_gray4(data[4*i+3], var) << 12) & 0xF000;
+
+ par->board->set_hdb(par, tmp);
+ par->board->set_ctl(par, AUOK190X_I80_WR, 1);
+ }
+
+ return 0;
+}
+
+static int auok190x_issue_pixels_gray8(struct auok190xfb_par *par, int size,
+ u16 *data)
{
struct device *dev = par->info->device;
int i;
@@ -91,6 +139,23 @@ static int auok190x_issue_pixels(struct auok190xfb_par *par, int size,
return 0;
}
+static int auok190x_issue_pixels(struct auok190xfb_par *par, int size,
+ u16 *data)
+{
+ struct fb_info *info = par->info;
+ struct device *dev = par->info->device;
+
+ if (info->var.bits_per_pixel == 8 && info->var.grayscale)
+ auok190x_issue_pixels_gray8(par, size, data);
+ else if (info->var.bits_per_pixel == 16)
+ auok190x_issue_pixels_rgb565(par, size, data);
+ else
+ dev_err(dev, "unsupported color mode (bits: %d, gray: %d)\n",
+ info->var.bits_per_pixel, info->var.grayscale);
+
+ return 0;
+}
+
static u16 auok190x_read_data(struct auok190xfb_par *par)
{
u16 data;
@@ -224,8 +289,8 @@ static void auok190xfb_dpy_deferred_io(struct fb_info *info,
{
struct fb_deferred_io *fbdefio = info->fbdefio;
struct auok190xfb_par *par = info->par;
+ u16 line_length = info->fix.line_length;
u16 yres = info->var.yres;
- u16 xres = info->var.xres;
u16 y1 = 0, h = 0;
int prev_index = -1;
struct page *cur;
@@ -254,7 +319,7 @@ static void auok190xfb_dpy_deferred_io(struct fb_info *info,
}
/* height increment is fixed per page */
- h_inc = DIV_ROUND_UP(PAGE_SIZE , xres);
+ h_inc = DIV_ROUND_UP(PAGE_SIZE , line_length);
/* calculate number of pages from pixel height */
threshold = par->consecutive_threshold / h_inc;
@@ -265,7 +330,7 @@ static void auok190xfb_dpy_deferred_io(struct fb_info *info,
list_for_each_entry(cur, &fbdefio->pagelist, lru) {
if (prev_index < 0) {
/* just starting so assign first page */
- y1 = (cur->index << PAGE_SHIFT) / xres;
+ y1 = (cur->index << PAGE_SHIFT) / line_length;
h = h_inc;
} else if ((cur->index - prev_index) <= threshold) {
/* page is within our threshold for single updates */
@@ -275,7 +340,7 @@ static void auok190xfb_dpy_deferred_io(struct fb_info *info,
par->update_partial(par, y1, y1 + h);
/* start over with our non consecutive page */
- y1 = (cur->index << PAGE_SHIFT) / xres;
+ y1 = (cur->index << PAGE_SHIFT) / line_length;
h = h_inc;
}
prev_index = cur->index;
@@ -376,27 +441,127 @@ static void auok190xfb_imageblit(struct fb_info *info,
static int auok190xfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
- if (info->var.xres != var->xres || info->var.yres != var->yres ||
- info->var.xres_virtual != var->xres_virtual ||
- info->var.yres_virtual != var->yres_virtual) {
- pr_info("%s: Resolution not supported: X%u x Y%u\n",
- __func__, var->xres, var->yres);
+ struct device *dev = info->device;
+ struct auok190xfb_par *par = info->par;
+ struct panel_info *panel = &panel_table[par->resolution];
+ int size;
+
+ /*
+ * Color depth
+ */
+
+ if (var->bits_per_pixel == 8 && var->grayscale == 1) {
+ /*
+ * For 8-bit grayscale, R, G, and B offset are equal.
+ */
+ var->red.length = 8;
+ var->red.offset = 0;
+ var->red.msb_right = 0;
+
+ var->green.length = 8;
+ var->green.offset = 0;
+ var->green.msb_right = 0;
+
+ var->blue.length = 8;
+ var->blue.offset = 0;
+ var->blue.msb_right = 0;
+
+ var->transp.length = 0;
+ var->transp.offset = 0;
+ var->transp.msb_right = 0;
+ } else if (var->bits_per_pixel == 16) {
+ var->red.length = 5;
+ var->red.offset = 11;
+ var->red.msb_right = 0;
+
+ var->green.length = 6;
+ var->green.offset = 5;
+ var->green.msb_right = 0;
+
+ var->blue.length = 5;
+ var->blue.offset = 0;
+ var->blue.msb_right = 0;
+
+ var->transp.length = 0;
+ var->transp.offset = 0;
+ var->transp.msb_right = 0;
+ } else {
+ dev_warn(dev, "unsupported color mode (bits: %d, grayscale: %d)\n",
+ info->var.bits_per_pixel, info->var.grayscale);
return -EINVAL;
}
/*
+ * Dimensions
+ */
+
+ switch (var->rotate) {
+ case FB_ROTATE_UR:
+ case FB_ROTATE_UD:
+ var->xres = panel->w;
+ var->yres = panel->h;
+ break;
+ case FB_ROTATE_CW:
+ case FB_ROTATE_CCW:
+ var->xres = panel->h;
+ var->yres = panel->w;
+ break;
+ default:
+ dev_dbg(dev, "Invalid rotation request\n");
+ return -EINVAL;
+ }
+
+ var->xres_virtual = var->xres;
+ var->yres_virtual = var->yres;
+
+ /*
* Memory limit
*/
- if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
- pr_info("%s: Memory Limit requested yres_virtual = %u\n",
- __func__, var->yres_virtual);
+ size = var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8;
+ if (size > info->fix.smem_len) {
+ dev_err(dev, "Memory limit exceeded, requested %dK\n",
+ size >> 10);
return -ENOMEM;
}
return 0;
}
+static int auok190xfb_set_fix(struct fb_info *info)
+{
+ struct fb_fix_screeninfo *fix = &info->fix;
+ struct fb_var_screeninfo *var = &info->var;
+
+ fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
+
+ fix->type = FB_TYPE_PACKED_PIXELS;
+ fix->accel = FB_ACCEL_NONE;
+ fix->visual = (var->grayscale) ? FB_VISUAL_STATIC_PSEUDOCOLOR
+ : FB_VISUAL_TRUECOLOR;
+ fix->xpanstep = 0;
+ fix->ypanstep = 0;
+ fix->ywrapstep = 0;
+
+ return 0;
+}
+
+static int auok190xfb_set_par(struct fb_info *info)
+{
+ struct auok190xfb_par *par = info->par;
+
+ par->rotation = info->var.rotate;
+ auok190xfb_set_fix(info);
+
+ /* reinit the controller to honor the rotation */
+ par->init(par);
+
+ /* wait for init to complete */
+ par->board->wait_for_rdy(par);
+
+ return 0;
+}
+
static struct fb_ops auok190xfb_ops = {
.owner = THIS_MODULE,
.fb_read = fb_sys_read,
@@ -405,6 +570,7 @@ static struct fb_ops auok190xfb_ops = {
.fb_copyarea = auok190xfb_copyarea,
.fb_imageblit = auok190xfb_imageblit,
.fb_check_var = auok190xfb_check_var,
+ .fb_set_par = auok190xfb_set_par,
};
/*
@@ -588,10 +754,16 @@ static int auok190x_power(struct auok190xfb_par *par, bool on)
static void auok190x_recover(struct auok190xfb_par *par)
{
+ struct device *dev = par->info->device;
+
auok190x_power(par, 0);
msleep(100);
auok190x_power(par, 1);
+ /* after powercycling the device, it's always active */
+ pm_runtime_set_active(dev);
+ par->standby = 0;
+
par->init(par);
/* wait for init to complete */
@@ -875,42 +1047,17 @@ int auok190x_common_probe(struct platform_device *pdev,
/* initialise fix, var, resolution and rotation */
strlcpy(info->fix.id, init->id, 16);
- info->fix.type = FB_TYPE_PACKED_PIXELS;
- info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
- info->fix.xpanstep = 0;
- info->fix.ypanstep = 0;
- info->fix.ywrapstep = 0;
- info->fix.accel = FB_ACCEL_NONE;
-
info->var.bits_per_pixel = 8;
info->var.grayscale = 1;
- info->var.red.length = 8;
- info->var.green.length = 8;
- info->var.blue.length = 8;
panel = &panel_table[board->resolution];
- /* if 90 degree rotation, switch width and height */
- if (board->rotation & 1) {
- info->var.xres = panel->h;
- info->var.yres = panel->w;
- info->var.xres_virtual = panel->h;
- info->var.yres_virtual = panel->w;
- info->fix.line_length = panel->h;
- } else {
- info->var.xres = panel->w;
- info->var.yres = panel->h;
- info->var.xres_virtual = panel->w;
- info->var.yres_virtual = panel->h;
- info->fix.line_length = panel->w;
- }
-
par->resolution = board->resolution;
- par->rotation = board->rotation;
+ par->rotation = 0;
/* videomemory handling */
- videomemorysize = roundup((panel->w * panel->h), PAGE_SIZE);
+ videomemorysize = roundup((panel->w * panel->h) * 2, PAGE_SIZE);
videomemory = vmalloc(videomemorysize);
if (!videomemory) {
ret = -ENOMEM;
@@ -924,6 +1071,12 @@ int auok190x_common_probe(struct platform_device *pdev,
info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
info->fbops = &auok190xfb_ops;
+ ret = auok190xfb_check_var(&info->var, info);
+ if (ret)
+ goto err_defio;
+
+ auok190xfb_set_fix(info);
+
/* deferred io init */
info->fbdefio = devm_kzalloc(info->device,
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-29 18:25:24 +0300