diff options
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_fimd.c | 78 |
1 files changed, 77 insertions, 1 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index 771800cc5f7..0b76bc058bc 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -17,6 +17,7 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/pm_runtime.h> #include <drm/exynos_drm.h> #include <plat/regs-fb-v4.h> @@ -85,6 +86,7 @@ struct fimd_context { unsigned long irq_flags; u32 vidcon0; u32 vidcon1; + bool suspended; struct fb_videomode *timing; }; @@ -137,7 +139,19 @@ static void fimd_dpms(struct device *subdrv_dev, int mode) { DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode); - /* TODO */ + switch (mode) { + case DRM_MODE_DPMS_ON: + pm_runtime_get_sync(subdrv_dev); + break; + case DRM_MODE_DPMS_STANDBY: + case DRM_MODE_DPMS_SUSPEND: + case DRM_MODE_DPMS_OFF: + pm_runtime_put_sync(subdrv_dev); + break; + default: + DRM_DEBUG_KMS("unspecified mode %d\n", mode); + break; + } } static void fimd_apply(struct device *subdrv_dev) @@ -210,6 +224,9 @@ static int fimd_enable_vblank(struct device *dev) DRM_DEBUG_KMS("%s\n", __FILE__); + if (ctx->suspended) + return -EPERM; + if (!test_and_set_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0); @@ -234,6 +251,9 @@ static void fimd_disable_vblank(struct device *dev) DRM_DEBUG_KMS("%s\n", __FILE__); + if (ctx->suspended) + return; + if (test_and_clear_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0); @@ -760,6 +780,10 @@ static int __devinit fimd_probe(struct platform_device *pdev) goto err_req_irq; } + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + for (win = 0; win < WINDOWS_NR; win++) fimd_clear_win(ctx, win); @@ -812,14 +836,25 @@ err_clk_get: static int __devexit fimd_remove(struct platform_device *pdev) { + struct device *dev = &pdev->dev; struct fimd_context *ctx = platform_get_drvdata(pdev); DRM_DEBUG_KMS("%s\n", __FILE__); exynos_drm_subdrv_unregister(&ctx->subdrv); + if (ctx->suspended) + goto out; + clk_disable(ctx->lcd_clk); clk_disable(ctx->bus_clk); + + pm_runtime_set_suspended(dev); + pm_runtime_put_sync(dev); + +out: + pm_runtime_disable(dev); + clk_put(ctx->lcd_clk); clk_put(ctx->bus_clk); @@ -833,12 +868,53 @@ static int __devexit fimd_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_RUNTIME +static int fimd_runtime_suspend(struct device *dev) +{ + struct fimd_context *ctx = get_fimd_context(dev); + + DRM_DEBUG_KMS("%s\n", __FILE__); + + clk_disable(ctx->lcd_clk); + clk_disable(ctx->bus_clk); + + ctx->suspended = true; + return 0; +} + +static int fimd_runtime_resume(struct device *dev) +{ + struct fimd_context *ctx = get_fimd_context(dev); + int ret; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + ret = clk_enable(ctx->bus_clk); + if (ret < 0) + return ret; + + ret = clk_enable(ctx->lcd_clk); + if (ret < 0) { + clk_disable(ctx->bus_clk); + return ret; + } + + ctx->suspended = false; + return 0; +} +#endif + +static const struct dev_pm_ops fimd_pm_ops = { + SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL) +}; + static struct platform_driver fimd_driver = { .probe = fimd_probe, .remove = __devexit_p(fimd_remove), .driver = { .name = "exynos4-fb", .owner = THIS_MODULE, + .pm = &fimd_pm_ops, }, }; |