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drm/fsl-dcu: implement suspend/resume using atomic helpers

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Use the drm_atomic_helper_suspend() and drm_atomic_helper_resume()
helpers to implement subsystem-level suspend/resume. This replaces
the (non-functional) regmap cache based suspend resume functionality.

Signed-off-by: Stefan Agner <stefan@agner.ch>
This commit is contained in:
Stefan Agner 2016-02-11 17:31:51 -08:00
parent ff09b41f03
commit a8db432471
2 changed files with 35 additions and 6 deletions
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40
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
View File

@ -11,6 +11,7 @@
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/console.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/mm.h>
@ -22,6 +23,7 @@
#include <linux/regmap.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
@ -42,10 +44,8 @@ static const struct regmap_config fsl_dcu_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.cache_type = REGCACHE_FLAT,
.volatile_reg = fsl_dcu_drm_is_volatile_reg,
.max_register = 0x11fc,
};
static int fsl_dcu_drm_irq_init(struct drm_device *dev)
@ -229,9 +229,25 @@ static int fsl_dcu_drm_pm_suspend(struct device *dev)
if (!fsl_dev)
return 0;
disable_irq(fsl_dev->irq);
drm_kms_helper_poll_disable(fsl_dev->drm);
regcache_cache_only(fsl_dev->regmap, true);
regcache_mark_dirty(fsl_dev->regmap);
console_lock();
drm_fbdev_cma_set_suspend(fsl_dev->fbdev, 1);
console_unlock();
fsl_dev->state = drm_atomic_helper_suspend(fsl_dev->drm);
if (IS_ERR(fsl_dev->state)) {
console_lock();
drm_fbdev_cma_set_suspend(fsl_dev->fbdev, 0);
console_unlock();
drm_kms_helper_poll_enable(fsl_dev->drm);
enable_irq(fsl_dev->irq);
return PTR_ERR(fsl_dev->state);
}
clk_disable_unprepare(fsl_dev->pix_clk);
clk_disable_unprepare(fsl_dev->clk);
return 0;
@ -251,9 +267,21 @@ static int fsl_dcu_drm_pm_resume(struct device *dev)
return ret;
}
ret = clk_prepare_enable(fsl_dev->pix_clk);
if (ret < 0) {
dev_err(dev, "failed to enable pix clk\n");
return ret;
}
fsl_dcu_drm_init_planes(fsl_dev->drm);
drm_atomic_helper_resume(fsl_dev->drm, fsl_dev->state);
console_lock();
drm_fbdev_cma_set_suspend(fsl_dev->fbdev, 0);
console_unlock();
drm_kms_helper_poll_enable(fsl_dev->drm);
regcache_cache_only(fsl_dev->regmap, false);
regcache_sync(fsl_dev->regmap);
enable_irq(fsl_dev->irq);
return 0;
}

1
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
View File

@ -194,6 +194,7 @@ struct fsl_dcu_drm_device {
struct drm_encoder encoder;
struct fsl_dcu_drm_connector connector;
const struct fsl_dcu_soc_data *soc;
struct drm_atomic_state *state;
};
void fsl_dcu_fbdev_init(struct drm_device *dev);