2017년 10월 31일 19:28에 Daniel Vetter 이(가) 쓴 글:
> On Mon, Oct 30, 2017 at 04:39:42PM +0100, Noralf Trønnes wrote:
>> This driver can use drm_fb_helper_lastclose() as its .lastclose callback.
>> It can also use drm_fb_helper_output_poll_changed() as its
>> .output_poll_changed callback.
>>
>> Cc: Inki Dae <inki....@samsung.com>
>> Cc: Joonyoung Shim <jy0922.s...@samsung.com>
>> Cc: Seung-Woo Kim <sw0312....@samsung.com>
>> Cc: Kyungmin Park <kyungmin.p...@samsung.com>
>> Signed-off-by: Noralf Trønnes <nor...@tronnes.org>
>> ---
>> drivers/gpu/drm/exynos/exynos_drm_drv.c | 8 ++------
>> drivers/gpu/drm/exynos/exynos_drm_fb.c | 2 +-
>> drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 18 ------------------
>> drivers/gpu/drm/exynos/exynos_drm_fbdev.h | 2 --
>> 4 files changed, 3 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c
>> b/drivers/gpu/drm/exynos/exynos_drm_drv.c
>> index e651a58c18cf..70f4895ac49c 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
>> @@ -16,6 +16,7 @@
>> #include <drm/drm_atomic.h>
>> #include <drm/drm_atomic_helper.h>
>> #include <drm/drm_crtc_helper.h>
>> +#include <drm/drm_fb_helper.h>
>>
>> #include <linux/component.h>
>>
>> @@ -89,11 +90,6 @@ static void exynos_drm_postclose(struct drm_device *dev,
>> struct drm_file *file)
>> file->driver_priv = NULL;
>> }
>>
>> -static void exynos_drm_lastclose(struct drm_device *dev)
>> -{
>> - exynos_drm_fbdev_restore_mode(dev);
>> -}
>> -
>> static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
>> .fault = exynos_drm_gem_fault,
>> .open = drm_gem_vm_open,
>> @@ -140,7 +136,7 @@ static struct drm_driver exynos_drm_driver = {
>> .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
>> | DRIVER_ATOMIC | DRIVER_RENDER,
>> .open = exynos_drm_open,
>> - .lastclose = exynos_drm_lastclose,
>> + .lastclose = drm_fb_helper_lastclose,
>> .postclose = exynos_drm_postclose,
>> .gem_free_object_unlocked = exynos_drm_gem_free_object,
>> .gem_vm_ops = &exynos_drm_gem_vm_ops,
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c
>> b/drivers/gpu/drm/exynos/exynos_drm_fb.c
>> index 8208df56a88f..0faaf829f5bf 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
>> @@ -205,7 +205,7 @@ static struct drm_mode_config_helper_funcs
>> exynos_drm_mode_config_helpers = {
>>
>> static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
>> .fb_create = exynos_user_fb_create,
>> - .output_poll_changed = exynos_drm_output_poll_changed,
>> + .output_poll_changed = drm_fb_helper_output_poll_changed,
>> .atomic_check = exynos_atomic_check,
>> .atomic_commit = drm_atomic_helper_commit,
>> };
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>> b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>> index dfb66ecf417b..132dd52d0ac7 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
>> @@ -270,24 +270,6 @@ void exynos_drm_fbdev_fini(struct drm_device *dev)
>> private->fb_helper = NULL;
>> }
>>
>> -void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
>> -{
>> - struct exynos_drm_private *private = dev->dev_private;
>> -
>> - if (!private || !private->fb_helper)
>
> Not sure this isn't risky, exynos has a strange load sequence ... Probably
> best if we get an ack from Inki.
I didn't test this patch on real hardware due to below two issues,
1. many warning messages printed out at vblank period.
- to finalize atomic flush drm_crtc_arm_vblank_event function is called but
Exynos drm driver has no implementation of get_vblank_timestamp and
get_scanout_position callbacks.
2. tranferring Panel commands to Panel device - s6e3ha2 Panel device - timed
out when exynos_drm_fbdev_restore_mode is called.
So I just looked into this patch and looks good to me.
Only a difference between old and new helper functions is above condition -
checking if private and private->fb_helper are null or not.
And dev->dev_private and private->fb_helper are cleared after calling
drm_dev_unregister function which calls drm_fb_helpaer_lastclose function so it
must be no problem.
Acked-by: Inki Dae <inki....@samsung.com>
Thanks,
Inki Dae
> -Daniel
>> - return;
>> -
>> - drm_fb_helper_restore_fbdev_mode_unlocked(private->fb_helper);
>> -}
>> -
>> -void exynos_drm_output_poll_changed(struct drm_device *dev)
>> -{
>> - struct exynos_drm_private *private = dev->dev_private;
>> - struct drm_fb_helper *fb_helper = private->fb_helper;
>> -
>> - drm_fb_helper_hotplug_event(fb_helper);
>> -}
>> -
>> void exynos_drm_fbdev_suspend(struct drm_device *dev)
>> {
>> struct exynos_drm_private *private = dev->dev_private;
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
>> b/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
>> index 645d1bb7f665..b33847223a85 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.h
>> @@ -19,8 +19,6 @@
>>
>> int exynos_drm_fbdev_init(struct drm_device *dev);
>> void exynos_drm_fbdev_fini(struct drm_device *dev);
>> -void exynos_drm_fbdev_restore_mode(struct drm_device *dev);
>> -void exynos_drm_output_poll_changed(struct drm_device *dev);
>> void exynos_drm_fbdev_suspend(struct drm_device *drm);
>> void exynos_drm_fbdev_resume(struct drm_device *drm);
>>
>> --
>> 2.14.2
>>
>
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