Re: [PATCH i-g-t] lib: kms: move framebuffer scanout offset/size to plane

[Lionel Landwerlin <lionel.g.landwerlin@intel.com>]

On 05/04/16 12:48, Ville Syrjälä wrote:
> On Tue, Apr 05, 2016 at 12:11:19PM +0100, Lionel Landwerlin wrote:
>> This fixes potential crashes when the framebuffer is unset from a
>> given plane.
>>
>> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
>> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
>> Cc: Marius Vlad <marius.c.vlad@intel.com>
>> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
>> ---
>>   lib/igt_fb.h  |  4 ----
>>   lib/igt_kms.c | 32 ++++++++++++++++----------------
>>   lib/igt_kms.h |  8 ++++++++
>>   3 files changed, 24 insertions(+), 20 deletions(-)
>>
>> diff --git a/lib/igt_fb.h b/lib/igt_fb.h
>> index e8fe3ac..0a06899 100644
>> --- a/lib/igt_fb.h
>> +++ b/lib/igt_fb.h
>> @@ -55,10 +55,6 @@ struct igt_fb {
>>   	unsigned size;
>>   	cairo_surface_t *cairo_surface;
>>   	unsigned domain;
>> -	uint32_t src_x;
>> -	uint32_t src_y;
>> -	uint32_t src_w;
>> -	uint32_t src_h;
>>   };
>>   
>>   enum igt_text_align {
>> diff --git a/lib/igt_kms.c b/lib/igt_kms.c
>> index 82257a6..b63a59d 100644
>> --- a/lib/igt_kms.c
>> +++ b/lib/igt_kms.c
>> @@ -1586,10 +1586,10 @@ igt_atomic_prepare_plane_commit(igt_plane_t *plane, igt_output_t *output,
>>   	}
>>   
>>   	if (plane->position_changed || plane->size_changed) {
>> -		uint32_t src_x = IGT_FIXED(plane->fb->src_x, 0); /* src_x */
>> -		uint32_t src_y = IGT_FIXED(plane->fb->src_y, 0); /* src_y */
>> -		uint32_t src_w = IGT_FIXED(plane->fb->src_w, 0); /* src_w */
>> -		uint32_t src_h = IGT_FIXED(plane->fb->src_h, 0); /* src_h */
>> +		uint32_t src_x = IGT_FIXED(plane->src_x, 0); /* src_x */
>> +		uint32_t src_y = IGT_FIXED(plane->src_y, 0); /* src_y */
>> +		uint32_t src_w = IGT_FIXED(plane->src_w, 0); /* src_w */
>> +		uint32_t src_h = IGT_FIXED(plane->src_h, 0); /* src_h */
>>   		int32_t crtc_x = plane->crtc_x;
>>   		int32_t crtc_y = plane->crtc_y;
>>   		uint32_t crtc_w = plane->crtc_w;
>> @@ -1677,10 +1677,10 @@ static int igt_drm_plane_commit(igt_plane_t *plane,
>>   		CHECK_RETURN(ret, fail_on_error);
>>   	} else if (plane->fb_changed || plane->position_changed ||
>>   		plane->size_changed) {
>> -		src_x = IGT_FIXED(plane->fb->src_x,0); /* src_x */
>> -		src_y = IGT_FIXED(plane->fb->src_y,0); /* src_y */
>> -		src_w = IGT_FIXED(plane->fb->src_w,0); /* src_w */
>> -		src_h = IGT_FIXED(plane->fb->src_h,0); /* src_h */
>> +		src_x = IGT_FIXED(plane->src_x,0); /* src_x */
>> +		src_y = IGT_FIXED(plane->src_y,0); /* src_y */
>> +		src_w = IGT_FIXED(plane->src_w,0); /* src_w */
>> +		src_h = IGT_FIXED(plane->src_h,0); /* src_h */
>>   		crtc_x = plane->crtc_x;
>>   		crtc_y = plane->crtc_y;
>>   		crtc_w = plane->crtc_w;
>> @@ -2201,10 +2201,10 @@ void igt_plane_set_fb(igt_plane_t *plane, struct igt_fb *fb)
>>   		plane->crtc_h = fb->height;
>>   
>>   		/* set default src pos/size as fb size */
>> -		fb->src_x = 0;
>> -		fb->src_y = 0;
>> -		fb->src_w = fb->width;
>> -		fb->src_h = fb->height;
>> +		plane->src_x = 0;
>> +		plane->src_y = 0;
>> +		plane->src_w = fb->width;
>> +		plane->src_h = fb->height;
>>   	} else {
>>   		plane->crtc_w = 0;
>>   		plane->crtc_h = 0;
>> @@ -2271,8 +2271,8 @@ void igt_fb_set_position(struct igt_fb *fb, igt_plane_t *plane,
>>   	LOG(display, "%s.%d: fb_set_position(%d,%d)\n",
>>   	    kmstest_pipe_name(pipe->pipe), plane->index, x, y);
>>   
>> -	fb->src_x = x;
>> -	fb->src_y = y;
>> +	plane->src_x = x;
>> +	plane->src_y = y;
>>   
>>   	plane->fb_changed = true;
>>   }
>> @@ -2297,8 +2297,8 @@ void igt_fb_set_size(struct igt_fb *fb, igt_plane_t *plane,
>>   	LOG(display, "%s.%d: fb_set_size(%dx%d)\n",
>>   	    kmstest_pipe_name(pipe->pipe), plane->index, w, h);
>>   
>> -	fb->src_w = w;
>> -	fb->src_h = h;
>> +	plane->src_w = w;
>> +	plane->src_h = h;
>>   
>>   	plane->fb_changed = true;
>>   }
>> diff --git a/lib/igt_kms.h b/lib/igt_kms.h
>> index 8ae1192..aabe244 100644
>> --- a/lib/igt_kms.h
>> +++ b/lib/igt_kms.h
>> @@ -243,6 +243,14 @@ typedef struct {
>>   	int crtc_x, crtc_y;
>>   	/* size within pipe_src_w x pipe_src_h */
>>   	int crtc_w, crtc_h;
>> +
>> +	/* position with the framebuffer */
>> +	uint32_t src_x;
>> +	uint32_t src_y;
>> +	/* size within the framebuffer*/
>> +	uint32_t src_w;
>> +	uint32_t src_h;
>
> Perhaps add a small note that these are 16.16
>
> Patch looks good to me otherwise.

I think we convert them to 16.16 at commit time.
The values stored there should be normal integers.

>
>> +
>>   	/* panning offset within the fb */
>>   	unsigned int pan_x, pan_y;
>>   	igt_rotation_t rotation;
>> -- 
>> 2.8.0.rc3

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