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path: root/drivers/video/imxfb.c
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Diffstat (limited to 'drivers/video/imxfb.c')
-rw-r--r--drivers/video/imxfb.c108
1 files changed, 95 insertions, 13 deletions
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index d58c68cd456..15a0ee6d8e2 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -14,7 +14,6 @@
* linux-arm-kernel@lists.arm.linux.org.uk
*/
-
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
@@ -27,9 +26,11 @@
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
+#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
+#include <linux/math64.h>
#include <mach/imxfb.h>
@@ -44,7 +45,12 @@
#define LCDC_SIZE 0x04
#define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
+
+#ifdef CONFIG_ARCH_MX1
#define SIZE_YMAX(y) ((y) & 0x1ff)
+#else
+#define SIZE_YMAX(y) ((y) & 0x3ff)
+#endif
#define LCDC_VPW 0x08
#define VPW_VPW(x) ((x) & 0x3ff)
@@ -54,7 +60,12 @@
#define CPOS_CC0 (1<<30)
#define CPOS_OP (1<<28)
#define CPOS_CXP(x) (((x) & 3ff) << 16)
+
+#ifdef CONFIG_ARCH_MX1
#define CPOS_CYP(y) ((y) & 0x1ff)
+#else
+#define CPOS_CYP(y) ((y) & 0x3ff)
+#endif
#define LCDC_LCWHB 0x10
#define LCWHB_BK_EN (1<<31)
@@ -63,9 +74,16 @@
#define LCWHB_BD(x) ((x) & 0xff)
#define LCDC_LCHCC 0x14
+
+#ifdef CONFIG_ARCH_MX1
#define LCHCC_CUR_COL_R(r) (((r) & 0x1f) << 11)
#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 5)
#define LCHCC_CUR_COL_B(b) ((b) & 0x1f)
+#else
+#define LCHCC_CUR_COL_R(r) (((r) & 0x3f) << 12)
+#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 6)
+#define LCHCC_CUR_COL_B(b) ((b) & 0x3f)
+#endif
#define LCDC_PCR 0x18
@@ -92,7 +110,13 @@
/* bit fields in imxfb.h */
#define LCDC_RMCR 0x34
+
+#ifdef CONFIG_ARCH_MX1
#define RMCR_LCDC_EN (1<<1)
+#else
+#define RMCR_LCDC_EN 0
+#endif
+
#define RMCR_SELF_REF (1<<0)
#define LCDC_LCDICR 0x38
@@ -119,6 +143,7 @@ struct imxfb_rgb {
struct imxfb_info {
struct platform_device *pdev;
void __iomem *regs;
+ struct clk *clk;
u_int max_bpp;
u_int max_xres;
@@ -159,6 +184,17 @@ struct imxfb_info {
#define MIN_XRES 64
#define MIN_YRES 64
+/* Actually this really is 18bit support, the lowest 2 bits of each colour
+ * are unused in hardware. We claim to have 24bit support to make software
+ * like X work, which does not support 18bit.
+ */
+static struct imxfb_rgb def_rgb_18 = {
+ .red = {.offset = 16, .length = 8,},
+ .green = {.offset = 8, .length = 8,},
+ .blue = {.offset = 0, .length = 8,},
+ .transp = {.offset = 0, .length = 0,},
+};
+
static struct imxfb_rgb def_rgb_16_tft = {
.red = {.offset = 11, .length = 5,},
.green = {.offset = 5, .length = 6,},
@@ -286,9 +322,12 @@ static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
switch (var->bits_per_pixel) {
+ case 32:
+ rgb = &def_rgb_18;
+ break;
case 16:
default:
- if (readl(fbi->regs + LCDC_PCR) & PCR_TFT)
+ if (fbi->pcr & PCR_TFT)
rgb = &def_rgb_16_tft;
else
rgb = &def_rgb_16_stn;
@@ -327,9 +366,7 @@ static int imxfb_set_par(struct fb_info *info)
struct imxfb_info *fbi = info->par;
struct fb_var_screeninfo *var = &info->var;
- pr_debug("set_par\n");
-
- if (var->bits_per_pixel == 16)
+ if (var->bits_per_pixel == 16 || var->bits_per_pixel == 32)
info->fix.visual = FB_VISUAL_TRUECOLOR;
else if (!fbi->cmap_static)
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
@@ -354,10 +391,6 @@ static void imxfb_enable_controller(struct imxfb_info *fbi)
{
pr_debug("Enabling LCD controller\n");
- /* initialize LCDC */
- writel(readl(fbi->regs + LCDC_RMCR) & ~RMCR_LCDC_EN,
- fbi->regs + LCDC_RMCR); /* just to be safe... */
-
writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
/* physical screen start address */
@@ -373,6 +406,8 @@ static void imxfb_enable_controller(struct imxfb_info *fbi)
writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
+ clk_enable(fbi->clk);
+
if (fbi->backlight_power)
fbi->backlight_power(1);
if (fbi->lcd_power)
@@ -388,6 +423,8 @@ static void imxfb_disable_controller(struct imxfb_info *fbi)
if (fbi->lcd_power)
fbi->lcd_power(0);
+ clk_disable(fbi->clk);
+
writel(0, fbi->regs + LCDC_RMCR);
}
@@ -431,6 +468,9 @@ static struct fb_ops imxfb_ops = {
static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
+ unsigned int pcr, lcd_clk;
+ unsigned long long tmp;
+
pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
var->xres, var->hsync_len,
var->left_margin, var->right_margin);
@@ -465,9 +505,9 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf
info->fix.id, var->lower_margin);
#endif
- writel(HCR_H_WIDTH(var->hsync_len) |
- HCR_H_WAIT_1(var->right_margin) |
- HCR_H_WAIT_2(var->left_margin),
+ writel(HCR_H_WIDTH(var->hsync_len - 1) |
+ HCR_H_WAIT_1(var->right_margin - 1) |
+ HCR_H_WAIT_2(var->left_margin - 3),
fbi->regs + LCDC_HCR);
writel(VCR_V_WIDTH(var->vsync_len) |
@@ -477,7 +517,23 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf
writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
fbi->regs + LCDC_SIZE);
- writel(fbi->pcr, fbi->regs + LCDC_PCR);
+
+ lcd_clk = clk_get_rate(fbi->clk);
+ tmp = var->pixclock * (unsigned long long)lcd_clk;
+ do_div(tmp, 1000000);
+ if (do_div(tmp, 1000000) > 500000)
+ tmp++;
+ pcr = (unsigned int)tmp;
+ if (--pcr > 0x3F) {
+ pcr = 0x3F;
+ printk(KERN_WARNING "Must limit pixel clock to %uHz\n",
+ lcd_clk / pcr);
+ }
+
+ /* add sync polarities */
+ pcr |= fbi->pcr & ~0x3F;
+
+ writel(pcr, fbi->regs + LCDC_PCR);
writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
@@ -619,6 +675,13 @@ static int __init imxfb_probe(struct platform_device *pdev)
goto failed_req;
}
+ fbi->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fbi->clk)) {
+ ret = PTR_ERR(fbi->clk);;
+ dev_err(&pdev->dev, "unable to get clock: %d\n", ret);
+ goto failed_getclock;
+ }
+
fbi->regs = ioremap(res->start, resource_size(res));
if (fbi->regs == NULL) {
printk(KERN_ERR"Cannot map frame buffer registers\n");
@@ -650,6 +713,12 @@ static int __init imxfb_probe(struct platform_device *pdev)
info->fix.smem_start = fbi->screen_dma;
}
+ if (pdata->init) {
+ ret = pdata->init(fbi->pdev);
+ if (ret)
+ goto failed_platform_init;
+ }
+
/*
* This makes sure that our colour bitfield
* descriptors are correctly initialised.
@@ -674,10 +743,15 @@ static int __init imxfb_probe(struct platform_device *pdev)
failed_register:
fb_dealloc_cmap(&info->cmap);
failed_cmap:
+ if (pdata->exit)
+ pdata->exit(fbi->pdev);
+failed_platform_init:
if (!pdata->fixed_screen_cpu)
dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
fbi->map_dma);
failed_map:
+ clk_put(fbi->clk);
+failed_getclock:
iounmap(fbi->regs);
failed_ioremap:
release_mem_region(res->start, res->end - res->start);
@@ -691,6 +765,7 @@ failed_init:
static int __devexit imxfb_remove(struct platform_device *pdev)
{
+ struct imx_fb_platform_data *pdata;
struct fb_info *info = platform_get_drvdata(pdev);
struct imxfb_info *fbi = info->par;
struct resource *res;
@@ -701,12 +776,19 @@ static int __devexit imxfb_remove(struct platform_device *pdev)
unregister_framebuffer(info);
+ pdata = pdev->dev.platform_data;
+ if (pdata->exit)
+ pdata->exit(fbi->pdev);
+
fb_dealloc_cmap(&info->cmap);
kfree(info->pseudo_palette);
framebuffer_release(info);
iounmap(fbi->regs);
release_mem_region(res->start, res->end - res->start + 1);
+ clk_disable(fbi->clk);
+ clk_put(fbi->clk);
+
platform_set_drvdata(pdev, NULL);
return 0;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-25 10:01:32 +0000