diff options
Diffstat (limited to 'drivers/video/samsung/lcdfreq.c')
| -rw-r--r-- | drivers/video/samsung/lcdfreq.c | 105 |
1 files changed, 85 insertions, 20 deletions
diff --git a/drivers/video/samsung/lcdfreq.c b/drivers/video/samsung/lcdfreq.c index 8c25c22..7e4af07 100644 --- a/drivers/video/samsung/lcdfreq.c +++ b/drivers/video/samsung/lcdfreq.c @@ -21,8 +21,6 @@ #include "s3cfb.h" -#define LCDFREQ_LIMIT_HZ 40 - enum lcdfreq_level_idx { LEVEL_NORMAL, LEVEL_LIMIT, @@ -217,30 +215,44 @@ int get_divider(struct fb_info *fb) fimd_div = gcd(lcdfreq->table[LEVEL_NORMAL].cmu_clkdiv, lcdfreq->table[LEVEL_LIMIT].cmu_clkdiv); + if ((!fimd_div) || (fimd_div > 16)) { + dev_info(fb->dev, "%s skip, %d\n", __func__, __LINE__); + goto err; + } + lcdfreq->table[LEVEL_NORMAL].cmu_clkdiv /= fimd_div; lcdfreq->table[LEVEL_LIMIT].cmu_clkdiv /= fimd_div; dev_info(fb->dev, "%s rate is %d, fimd divider=%d\n", clk->name, rate, fimd_div); + fimd_div--; for (i = 0; i < LCDFREQ_LEVEL_END; i++) { - lcdfreq->table[i].cmu_clkdiv--; - dev_info(fb->dev, "%dHZ divider is %d\n", + if (lcdfreq->table[i].cmu_clkdiv > 16) { + dev_info(fb->dev, "%s skip, %d\n", __func__, __LINE__); + goto err; + } + dev_info(fb->dev, "%dhz div is %d\n", lcdfreq->table[i].hz, lcdfreq->table[i].cmu_clkdiv); + lcdfreq->table[i].cmu_clkdiv--; } reg = (readl(fbdev->regs + S3C_VIDCON0) & (S3C_VIDCON0_CLKVAL_F(0xff))) >> 6; - reg++; - - if (fimd_div != reg) - return -EINVAL; + if (fimd_div != reg) { + dev_info(fb->dev, "%s skip, %d\n", __func__, __LINE__); + goto err; + } reg = (readl(sclk->reg_div.reg)) >> sclk->reg_div.shift; reg &= 0xf; - - if (lcdfreq->table[LEVEL_NORMAL].cmu_clkdiv != reg) - return -EINVAL; + if (lcdfreq->table[LEVEL_NORMAL].cmu_clkdiv != reg) { + dev_info(fb->dev, "%s skip, %d\n", __func__, __LINE__); + goto err; + } return 0; + +err: + return -EINVAL; } static ssize_t level_show(struct device *dev, @@ -256,7 +268,7 @@ static ssize_t level_show(struct device *dev, return -EINVAL; } - return sprintf(buf, "%dHZ, div=%d\n", lcdfreq->table[lcdfreq->level].hz, get_div(fbdev)); + return sprintf(buf, "%dhz, div=%d\n", lcdfreq->table[lcdfreq->level].hz, get_div(fbdev)); } static ssize_t level_store(struct device *dev, @@ -296,12 +308,61 @@ static ssize_t usage_show(struct device *dev, return sprintf(buf, "%d\n", atomic_read(&lcdfreq->usage)); } +#if 0 +static ssize_t freq_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct fb_info *fb = dev_get_drvdata(dev); + struct s3cfb_window *win = fb->par; + struct s3cfb_global *fbdev = get_fimd_global(win->id); + struct s3cfb_lcd *lcd = fbdev->lcd; + + return sprintf(buf, "%dhz, hfp=%d, hbp=%d, hsw=%d, div=%d\n", lcd->freq, + lcd->timing.h_fp, lcd->timing.h_bp, lcd->timing.h_sw, get_div(fbdev)+1); +} + +extern void s5p_dsim_set_lcd_freq_change(struct s3cfb_lcd_timing *timing); + +static ssize_t freq_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct fb_info *fb = dev_get_drvdata(dev); + struct s3cfb_window *win = fb->par; + struct s3cfb_global *fbdev = get_fimd_global(win->id); + struct s3cfb_lcd *lcd = fbdev->lcd; + struct s3cfb_lcd_timing *timing = &lcd->timing; + struct fb_var_screeninfo *var = &fb->var; + + lcd->freq_limit = 0; + sscanf(buf, "%d %d %d %d", &lcd->freq, + &timing->h_fp, &timing->h_bp, &timing->h_sw); + + var->hsync_len = timing->h_sw; + var->left_margin = timing->h_bp; + var->right_margin = timing->h_fp; + + var->pixclock = (lcd->freq * + (var->left_margin + var->right_margin + + var->hsync_len + var->xres) * + (var->upper_margin + var->lower_margin + + var->vsync_len + var->yres)); + var->pixclock = KHZ2PICOS(var->pixclock/1000); + + s5p_dsim_set_lcd_freq_change(timing); + + return count; +} + +static DEVICE_ATTR(freq, S_IRUGO|S_IWUSR, freq_show, freq_store); +#endif + static DEVICE_ATTR(level, S_IRUGO|S_IWUSR, level_show, level_store); static DEVICE_ATTR(usage, S_IRUGO, usage_show, NULL); static struct attribute *lcdfreq_attributes[] = { &dev_attr_level.attr, &dev_attr_usage.attr, +/* &dev_attr_freq.attr, */ NULL, }; @@ -323,7 +384,7 @@ static void lcdfreq_early_suspend(struct early_suspend *h) atomic_set(&lcdfreq->usage, 0); mutex_unlock(&lcdfreq->lock); - return ; + return; } static void lcdfreq_late_resume(struct early_suspend *h) @@ -392,7 +453,7 @@ static void lcdfreq_status_work(struct work_struct *work) cancel_delayed_work(&lcdfreq->work); - dev_info(lcdfreq->dev, "\tHZ=%d, usage=%d\n", hz, atomic_read(&lcdfreq->usage)); + dev_info(lcdfreq->dev, "\thz=%d, usage=%d\n", hz, atomic_read(&lcdfreq->usage)); schedule_delayed_work(&lcdfreq->work, HZ*120); } @@ -405,8 +466,8 @@ int lcdfreq_init(struct fb_info *fb) struct fb_var_screeninfo *var = &fb->var; struct lcdfreq_info *lcdfreq = NULL; - u32 vclk = 0; - int ret; + u32 vclk; + int ret = 0; lcdfreq = kzalloc(sizeof(struct lcdfreq_info), GFP_KERNEL); if (!lcdfreq) { @@ -415,6 +476,11 @@ int lcdfreq_init(struct fb_info *fb) goto err_1; } + if (!lcd->freq_limit) { + ret = -EINVAL; + goto err_2; + } + fbdev->data = lcdfreq; lcdfreq->dev = fb->dev; @@ -430,7 +496,7 @@ int lcdfreq_init(struct fb_info *fb) lcdfreq->table[LEVEL_NORMAL].pixclock = var->pixclock; lcdfreq->table[LEVEL_NORMAL].hz = lcd->freq; - vclk = (LCDFREQ_LIMIT_HZ * + vclk = (lcd->freq_limit * (var->left_margin + var->right_margin + var->hsync_len + var->xres) * (var->upper_margin + var->lower_margin @@ -438,11 +504,11 @@ int lcdfreq_init(struct fb_info *fb) lcdfreq->table[LEVEL_LIMIT].level = LEVEL_LIMIT; lcdfreq->table[LEVEL_LIMIT].vclk = vclk; lcdfreq->table[LEVEL_LIMIT].pixclock = KHZ2PICOS(vclk/1000); - lcdfreq->table[LEVEL_LIMIT].hz = LCDFREQ_LIMIT_HZ; + lcdfreq->table[LEVEL_LIMIT].hz = lcd->freq_limit; ret = get_divider(fb); if (ret < 0) { - pr_err("fail to init lcd freq switch"); + pr_err("skip lcd freq switch init"); fbdev->data = NULL; goto err_1; } @@ -489,4 +555,3 @@ err_1: return ret; } - |