On Fri, May 5, 2017 at 4:36 PM, <icenowy@xxxxxxx> wrote:
> 在 2017-05-05 10:56，Chen-Yu Tsai 写道：
>>
>> On Thu, May 4, 2017 at 7:48 PM, Icenowy Zheng <icenowy@xxxxxxx> wrote:
>>>
>>> As we are going to add support for the Allwinner DE2 engine in sun4i-drm
>>> driver, we will finally have two types of display engines -- the DE1
>>> backend and the DE2 mixer. They both do some display blending and feed
>>> graphics data to TCON, so I choose to call them both "engine" here.
>>
>>
>> These engines composite different layers into a final image which is
>> then sent out to the TCONs. As such, "compositor" would be an accurate
>> name.
>>
>> However, "engine" is OK, since Allwinner calls this stuff Display Engine
>> 1.0 and 2.0. Hope there won't be a 3.0 ...
>>
>> Maybe you should note that in your commit message. That is justifies the
>> name.
>>
>>>
>>> Abstract the engine type to a new struct with an ops struct, which
>>> contains
>>> functions that should be called outside the engine-specified code (in
>>> TCON, CRTC or TV Encoder code).
>>>
>>> Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
>>> ---
>>> Changes in v6:
>>> - Rebased on wens's multi-pipeline patchset.
>>> - Split out Makefile changes.
>>> Changes in v5:
>>> - Really made a sunxi_engine struct type, and moved ops pointer
>>> into it.
>>> - Added checked ops wrappers.
>>> - Changed the second parameter of layers_init from crtc to engine.
>>> Changes in v4:
>>> - Comments to tag the color correction functions as optional.
>>> - Check before calling the optional functions.
>>> - Change layers_init to satisfy new PATCH v4 04/11.
>>>
>>> drivers/gpu/drm/sun4i/sun4i_backend.c | 68 ++++++++++++---------
>>> drivers/gpu/drm/sun4i/sun4i_backend.h | 17 +++---
>>> drivers/gpu/drm/sun4i/sun4i_crtc.c | 11 ++--
>>> drivers/gpu/drm/sun4i/sun4i_crtc.h | 4 +-
>>> drivers/gpu/drm/sun4i/sun4i_drv.c | 2 +-
>>> drivers/gpu/drm/sun4i/sun4i_drv.h | 2 +-
>>> drivers/gpu/drm/sun4i/sun4i_layer.c | 8 +--
>>> drivers/gpu/drm/sun4i/sun4i_layer.h | 5 +-
>>> drivers/gpu/drm/sun4i/sun4i_tcon.c | 36 ++++++-----
>>> drivers/gpu/drm/sun4i/sun4i_tv.c | 9 ++-
>>> drivers/gpu/drm/sun4i/sunxi_engine.h | 112
>>> ++++++++++++++++++++++++++++++++++
>>> 11 files changed, 198 insertions(+), 76 deletions(-)
>>> create mode 100644 drivers/gpu/drm/sun4i/sunxi_engine.h
>>>
[...]
>>> diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.h
>>> b/drivers/gpu/drm/sun4i/sun4i_layer.h
>>> index 5ea5c994d6ea..004b7cfe8ffb 100644
>>> --- a/drivers/gpu/drm/sun4i/sun4i_layer.h
>>> +++ b/drivers/gpu/drm/sun4i/sun4i_layer.h
>>> @@ -13,6 +13,8 @@
>>> #ifndef _SUN4I_LAYER_H_
>>> #define _SUN4I_LAYER_H_
>>>
>>> +struct sunxi_engine;
>>> +
>>> struct sun4i_layer {
>>> struct drm_plane plane;
>>> struct sun4i_drv *drv;
>>> @@ -27,6 +29,5 @@ plane_to_sun4i_layer(struct drm_plane *plane)
>>> }
>>>
>>> struct drm_plane **sun4i_layers_init(struct drm_device *drm,
>>> - struct sun4i_crtc *crtc);
>>> -
>>> + struct sunxi_engine *engine);
>>
>>
>> Please keep the newline.
>>
>>> #endif /* _SUN4I_LAYER_H_ */
>>> diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c
>>> b/drivers/gpu/drm/sun4i/sun4i_tcon.c
>>> index 29fd829aa54c..c48135a10fda 100644
>>> --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
>>> +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
>>> @@ -26,12 +26,12 @@
>>> #include <linux/regmap.h>
>>> #include <linux/reset.h>
>>>
>>> -#include "sun4i_backend.h"
>>> #include "sun4i_crtc.h"
>>> #include "sun4i_dotclock.h"
>>> #include "sun4i_drv.h"
>>> #include "sun4i_rgb.h"
>>> #include "sun4i_tcon.h"
>>> +#include "sunxi_engine.h"
>>
>>
>> Please keep the headers in alphabetical order.
>
>
> sunxi is of course after sun4i.
Sorry. My bad. :(
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