summaryrefslogtreecommitdiffstats
path: root/drivers/video/da8xx-fb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/da8xx-fb.c')
-rw-r--r--drivers/video/da8xx-fb.c283
1 files changed, 220 insertions, 63 deletions
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index 113d43a16f54..80665f66ac1a 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -26,7 +26,9 @@
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
+#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
+#include <linux/wait.h>
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <linux/console.h>
@@ -48,6 +50,7 @@
#define LCD_PL_LOAD_DONE BIT(6)
#define LCD_FIFO_UNDERFLOW BIT(5)
#define LCD_SYNC_LOST BIT(2)
+#define LCD_FRAME_DONE BIT(0)
/* LCD DMA Control Register */
#define LCD_DMA_BURST_SIZE(x) ((x) << 4)
@@ -86,6 +89,8 @@
#define LCD_V2_LIDD_CLK_EN BIT(1)
#define LCD_V2_CORE_CLK_EN BIT(0)
#define LCD_V2_LPP_B10 26
+#define LCD_V2_TFT_24BPP_MODE BIT(25)
+#define LCD_V2_TFT_24BPP_UNPACK BIT(26)
/* LCD Raster Timing 2 Register */
#define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
@@ -135,6 +140,8 @@ static void __iomem *da8xx_fb_reg_base;
static struct resource *lcdc_regs;
static unsigned int lcd_revision;
static irq_handler_t lcdc_irq_handler;
+static wait_queue_head_t frame_done_wq;
+static int frame_done_flag;
static inline unsigned int lcdc_read(unsigned int addr)
{
@@ -156,7 +163,6 @@ struct da8xx_fb_par {
unsigned int dma_end;
struct clk *lcdc_clk;
int irq;
- unsigned short pseudo_palette[16];
unsigned int palette_sz;
unsigned int pxl_clk;
int blank;
@@ -175,6 +181,7 @@ struct da8xx_fb_par {
unsigned int lcd_fck_rate;
#endif
void (*panel_power_ctrl)(int);
+ u32 pseudo_palette[16];
};
/* Variable Screen Information */
@@ -288,13 +295,26 @@ static inline void lcd_enable_raster(void)
}
/* Disable the Raster Engine of the LCD Controller */
-static inline void lcd_disable_raster(void)
+static inline void lcd_disable_raster(bool wait_for_frame_done)
{
u32 reg;
+ int ret;
reg = lcdc_read(LCD_RASTER_CTRL_REG);
if (reg & LCD_RASTER_ENABLE)
lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
+ else
+ /* return if already disabled */
+ return;
+
+ if ((wait_for_frame_done == true) && (lcd_revision == LCD_VERSION_2)) {
+ frame_done_flag = 0;
+ ret = wait_event_interruptible_timeout(frame_done_wq,
+ frame_done_flag != 0,
+ msecs_to_jiffies(50));
+ if (ret == 0)
+ pr_err("LCD Controller timed out\n");
+ }
}
static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
@@ -321,7 +341,8 @@ static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
} else {
reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
LCD_V2_END_OF_FRAME0_INT_ENA |
- LCD_V2_END_OF_FRAME1_INT_ENA;
+ LCD_V2_END_OF_FRAME1_INT_ENA |
+ LCD_FRAME_DONE;
lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
}
reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
@@ -499,6 +520,9 @@ static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
{
u32 reg;
+ if (bpp > 16 && lcd_revision == LCD_VERSION_1)
+ return -EINVAL;
+
/* Set the Panel Width */
/* Pixels per line = (PPL + 1)*16 */
if (lcd_revision == LCD_VERSION_1) {
@@ -542,14 +566,19 @@ static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
if (raster_order)
reg |= LCD_RASTER_ORDER;
- lcdc_write(reg, LCD_RASTER_CTRL_REG);
+
+ par->palette_sz = 16 * 2;
switch (bpp) {
case 1:
case 2:
case 4:
case 16:
- par->palette_sz = 16 * 2;
+ break;
+ case 24:
+ reg |= LCD_V2_TFT_24BPP_MODE;
+ case 32:
+ reg |= LCD_V2_TFT_24BPP_UNPACK;
break;
case 8:
@@ -560,9 +589,12 @@ static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
return -EINVAL;
}
+ lcdc_write(reg, LCD_RASTER_CTRL_REG);
+
return 0;
}
+#define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF - (val)) >> 16)
static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
@@ -578,13 +610,38 @@ static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
return 1;
- if (info->var.bits_per_pixel == 4) {
- if (regno > 15)
- return 1;
+ if (info->var.bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
+ return -EINVAL;
- if (info->var.grayscale) {
- pal = regno;
- } else {
+ switch (info->fix.visual) {
+ case FB_VISUAL_TRUECOLOR:
+ red = CNVT_TOHW(red, info->var.red.length);
+ green = CNVT_TOHW(green, info->var.green.length);
+ blue = CNVT_TOHW(blue, info->var.blue.length);
+ break;
+ case FB_VISUAL_PSEUDOCOLOR:
+ switch (info->var.bits_per_pixel) {
+ case 4:
+ if (regno > 15)
+ return -EINVAL;
+
+ if (info->var.grayscale) {
+ pal = regno;
+ } else {
+ red >>= 4;
+ green >>= 8;
+ blue >>= 12;
+
+ pal = red & 0x0f00;
+ pal |= green & 0x00f0;
+ pal |= blue & 0x000f;
+ }
+ if (regno == 0)
+ pal |= 0x2000;
+ palette[regno] = pal;
+ break;
+
+ case 8:
red >>= 4;
green >>= 8;
blue >>= 12;
@@ -592,36 +649,36 @@ static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
pal = (red & 0x0f00);
pal |= (green & 0x00f0);
pal |= (blue & 0x000f);
- }
- if (regno == 0)
- pal |= 0x2000;
- palette[regno] = pal;
-
- } else if (info->var.bits_per_pixel == 8) {
- red >>= 4;
- green >>= 8;
- blue >>= 12;
-
- pal = (red & 0x0f00);
- pal |= (green & 0x00f0);
- pal |= (blue & 0x000f);
- if (palette[regno] != pal) {
- update_hw = 1;
- palette[regno] = pal;
+ if (palette[regno] != pal) {
+ update_hw = 1;
+ palette[regno] = pal;
+ }
+ break;
}
- } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
- red >>= (16 - info->var.red.length);
- red <<= info->var.red.offset;
+ break;
+ }
- green >>= (16 - info->var.green.length);
- green <<= info->var.green.offset;
+ /* Truecolor has hardware independent palette */
+ if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+ u32 v;
- blue >>= (16 - info->var.blue.length);
- blue <<= info->var.blue.offset;
+ if (regno > 15)
+ return -EINVAL;
- par->pseudo_palette[regno] = red | green | blue;
+ v = (red << info->var.red.offset) |
+ (green << info->var.green.offset) |
+ (blue << info->var.blue.offset);
+ switch (info->var.bits_per_pixel) {
+ case 16:
+ ((u16 *) (info->pseudo_palette))[regno] = v;
+ break;
+ case 24:
+ case 32:
+ ((u32 *) (info->pseudo_palette))[regno] = v;
+ break;
+ }
if (palette[0] != 0x4000) {
update_hw = 1;
palette[0] = 0x4000;
@@ -634,11 +691,12 @@ static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
return 0;
}
+#undef CNVT_TOHW
static void lcd_reset(struct da8xx_fb_par *par)
{
/* Disable the Raster if previously Enabled */
- lcd_disable_raster();
+ lcd_disable_raster(false);
/* DMA has to be disabled */
lcdc_write(0, LCD_DMA_CTRL_REG);
@@ -734,7 +792,7 @@ static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
u32 stat = lcdc_read(LCD_MASKED_STAT_REG);
if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
- lcd_disable_raster();
+ lcd_disable_raster(false);
lcdc_write(stat, LCD_MASKED_STAT_REG);
lcd_enable_raster();
} else if (stat & LCD_PL_LOAD_DONE) {
@@ -744,7 +802,7 @@ static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
* interrupt via the following write to the status register. If
* this is done after then one gets multiple PL done interrupts.
*/
- lcd_disable_raster();
+ lcd_disable_raster(false);
lcdc_write(stat, LCD_MASKED_STAT_REG);
@@ -775,6 +833,14 @@ static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
par->vsync_flag = 1;
wake_up_interruptible(&par->vsync_wait);
}
+
+ /* Set only when controller is disabled and at the end of
+ * active frame
+ */
+ if (stat & BIT(0)) {
+ frame_done_flag = 1;
+ wake_up_interruptible(&frame_done_wq);
+ }
}
lcdc_write(0, LCD_END_OF_INT_IND_REG);
@@ -789,7 +855,7 @@ static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
u32 reg_ras;
if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
- lcd_disable_raster();
+ lcd_disable_raster(false);
lcdc_write(stat, LCD_STAT_REG);
lcd_enable_raster();
} else if (stat & LCD_PL_LOAD_DONE) {
@@ -799,7 +865,7 @@ static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
* interrupt via the following write to the status register. If
* this is done after then one gets multiple PL done interrupts.
*/
- lcd_disable_raster();
+ lcd_disable_raster(false);
lcdc_write(stat, LCD_STAT_REG);
@@ -842,6 +908,9 @@ static int fb_check_var(struct fb_var_screeninfo *var,
{
int err = 0;
+ if (var->bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
+ return -EINVAL;
+
switch (var->bits_per_pixel) {
case 1:
case 8:
@@ -877,6 +946,26 @@ static int fb_check_var(struct fb_var_screeninfo *var,
var->transp.length = 0;
var->nonstd = 0;
break;
+ case 24:
+ var->red.offset = 16;
+ var->red.length = 8;
+ var->green.offset = 8;
+ var->green.length = 8;
+ var->blue.offset = 0;
+ var->blue.length = 8;
+ var->nonstd = 0;
+ break;
+ case 32:
+ var->transp.offset = 24;
+ var->transp.length = 8;
+ var->red.offset = 16;
+ var->red.length = 8;
+ var->green.offset = 8;
+ var->green.length = 8;
+ var->blue.offset = 0;
+ var->blue.length = 8;
+ var->nonstd = 0;
+ break;
default:
err = -EINVAL;
}
@@ -898,9 +987,10 @@ static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
if (val == CPUFREQ_POSTCHANGE) {
if (par->lcd_fck_rate != clk_get_rate(par->lcdc_clk)) {
par->lcd_fck_rate = clk_get_rate(par->lcdc_clk);
- lcd_disable_raster();
+ lcd_disable_raster(true);
lcd_calc_clk_divider(par);
- lcd_enable_raster();
+ if (par->blank == FB_BLANK_UNBLANK)
+ lcd_enable_raster();
}
}
@@ -935,7 +1025,7 @@ static int __devexit fb_remove(struct platform_device *dev)
if (par->panel_power_ctrl)
par->panel_power_ctrl(0);
- lcd_disable_raster();
+ lcd_disable_raster(true);
lcdc_write(0, LCD_RASTER_CTRL_REG);
/* disable DMA */
@@ -948,8 +1038,8 @@ static int __devexit fb_remove(struct platform_device *dev)
dma_free_coherent(NULL, par->vram_size, par->vram_virt,
par->vram_phys);
free_irq(par->irq, par);
- clk_disable(par->lcdc_clk);
- clk_put(par->lcdc_clk);
+ pm_runtime_put_sync(&dev->dev);
+ pm_runtime_disable(&dev->dev);
framebuffer_release(info);
iounmap(da8xx_fb_reg_base);
release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
@@ -1051,7 +1141,7 @@ static int cfb_blank(int blank, struct fb_info *info)
if (par->panel_power_ctrl)
par->panel_power_ctrl(0);
- lcd_disable_raster();
+ lcd_disable_raster(true);
break;
default:
ret = -EINVAL;
@@ -1183,9 +1273,9 @@ static int __devinit fb_probe(struct platform_device *device)
ret = -ENODEV;
goto err_ioremap;
}
- ret = clk_enable(fb_clk);
- if (ret)
- goto err_clk_put;
+
+ pm_runtime_enable(&device->dev);
+ pm_runtime_get_sync(&device->dev);
/* Determine LCD IP Version */
switch (lcdc_read(LCD_PID_REG)) {
@@ -1213,7 +1303,7 @@ static int __devinit fb_probe(struct platform_device *device)
if (i == ARRAY_SIZE(known_lcd_panels)) {
dev_err(&device->dev, "GLCD: No valid panel found\n");
ret = -ENODEV;
- goto err_clk_disable;
+ goto err_pm_runtime_disable;
} else
dev_info(&device->dev, "GLCD: Found %s panel\n",
fb_pdata->type);
@@ -1225,7 +1315,7 @@ static int __devinit fb_probe(struct platform_device *device)
if (!da8xx_fb_info) {
dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
ret = -ENOMEM;
- goto err_clk_disable;
+ goto err_pm_runtime_disable;
}
par = da8xx_fb_info->par;
@@ -1356,8 +1446,10 @@ static int __devinit fb_probe(struct platform_device *device)
if (lcd_revision == LCD_VERSION_1)
lcdc_irq_handler = lcdc_irq_handler_rev01;
- else
+ else {
+ init_waitqueue_head(&frame_done_wq);
lcdc_irq_handler = lcdc_irq_handler_rev02;
+ }
ret = request_irq(par->irq, lcdc_irq_handler, 0,
DRIVER_NAME, par);
@@ -1385,11 +1477,9 @@ err_release_fb_mem:
err_release_fb:
framebuffer_release(da8xx_fb_info);
-err_clk_disable:
- clk_disable(fb_clk);
-
-err_clk_put:
- clk_put(fb_clk);
+err_pm_runtime_disable:
+ pm_runtime_put_sync(&device->dev);
+ pm_runtime_disable(&device->dev);
err_ioremap:
iounmap(da8xx_fb_reg_base);
@@ -1401,6 +1491,69 @@ err_request_mem:
}
#ifdef CONFIG_PM
+struct lcdc_context {
+ u32 clk_enable;
+ u32 ctrl;
+ u32 dma_ctrl;
+ u32 raster_timing_0;
+ u32 raster_timing_1;
+ u32 raster_timing_2;
+ u32 int_enable_set;
+ u32 dma_frm_buf_base_addr_0;
+ u32 dma_frm_buf_ceiling_addr_0;
+ u32 dma_frm_buf_base_addr_1;
+ u32 dma_frm_buf_ceiling_addr_1;
+ u32 raster_ctrl;
+} reg_context;
+
+static void lcd_context_save(void)
+{
+ if (lcd_revision == LCD_VERSION_2) {
+ reg_context.clk_enable = lcdc_read(LCD_CLK_ENABLE_REG);
+ reg_context.int_enable_set = lcdc_read(LCD_INT_ENABLE_SET_REG);
+ }
+
+ reg_context.ctrl = lcdc_read(LCD_CTRL_REG);
+ reg_context.dma_ctrl = lcdc_read(LCD_DMA_CTRL_REG);
+ reg_context.raster_timing_0 = lcdc_read(LCD_RASTER_TIMING_0_REG);
+ reg_context.raster_timing_1 = lcdc_read(LCD_RASTER_TIMING_1_REG);
+ reg_context.raster_timing_2 = lcdc_read(LCD_RASTER_TIMING_2_REG);
+ reg_context.dma_frm_buf_base_addr_0 =
+ lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+ reg_context.dma_frm_buf_ceiling_addr_0 =
+ lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+ reg_context.dma_frm_buf_base_addr_1 =
+ lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+ reg_context.dma_frm_buf_ceiling_addr_1 =
+ lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+ reg_context.raster_ctrl = lcdc_read(LCD_RASTER_CTRL_REG);
+ return;
+}
+
+static void lcd_context_restore(void)
+{
+ if (lcd_revision == LCD_VERSION_2) {
+ lcdc_write(reg_context.clk_enable, LCD_CLK_ENABLE_REG);
+ lcdc_write(reg_context.int_enable_set, LCD_INT_ENABLE_SET_REG);
+ }
+
+ lcdc_write(reg_context.ctrl, LCD_CTRL_REG);
+ lcdc_write(reg_context.dma_ctrl, LCD_DMA_CTRL_REG);
+ lcdc_write(reg_context.raster_timing_0, LCD_RASTER_TIMING_0_REG);
+ lcdc_write(reg_context.raster_timing_1, LCD_RASTER_TIMING_1_REG);
+ lcdc_write(reg_context.raster_timing_2, LCD_RASTER_TIMING_2_REG);
+ lcdc_write(reg_context.dma_frm_buf_base_addr_0,
+ LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+ lcdc_write(reg_context.dma_frm_buf_ceiling_addr_0,
+ LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+ lcdc_write(reg_context.dma_frm_buf_base_addr_1,
+ LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+ lcdc_write(reg_context.dma_frm_buf_ceiling_addr_1,
+ LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+ lcdc_write(reg_context.raster_ctrl, LCD_RASTER_CTRL_REG);
+ return;
+}
+
static int fb_suspend(struct platform_device *dev, pm_message_t state)
{
struct fb_info *info = platform_get_drvdata(dev);
@@ -1411,8 +1564,9 @@ static int fb_suspend(struct platform_device *dev, pm_message_t state)
par->panel_power_ctrl(0);
fb_set_suspend(info, 1);
- lcd_disable_raster();
- clk_disable(par->lcdc_clk);
+ lcd_disable_raster(true);
+ lcd_context_save();
+ pm_runtime_put_sync(&dev->dev);
console_unlock();
return 0;
@@ -1423,11 +1577,14 @@ static int fb_resume(struct platform_device *dev)
struct da8xx_fb_par *par = info->par;
console_lock();
- clk_enable(par->lcdc_clk);
- lcd_enable_raster();
+ pm_runtime_get_sync(&dev->dev);
+ lcd_context_restore();
+ if (par->blank == FB_BLANK_UNBLANK) {
+ lcd_enable_raster();
- if (par->panel_power_ctrl)
- par->panel_power_ctrl(1);
+ if (par->panel_power_ctrl)
+ par->panel_power_ctrl(1);
+ }
fb_set_suspend(info, 0);
console_unlock();
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-04 09:39:14 +0000