On Thu, 25 Oct 2012 17:10:01 +0100, Damien Lespiau <damien.lesp...@gmail.com> 
wrote:
> From: Damien Lespiau <damien.lesp...@intel.com>
> 
> HSW consolidates SPRTILEOFF and SPRLINOFF into a single SPROFFSET
> register.
> 
> Signed-off-by: Damien Lespiau <damien.lesp...@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_reg.h     |    3 +++
>  drivers/gpu/drm/i915/intel_sprite.c |   18 +++++++++++++-----
>  2 files changed, 16 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index be22aeb..2a6c0b6 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -3187,6 +3187,7 @@
>  #define _SPRA_SURF           0x7029c
>  #define _SPRA_KEYMAX         0x702a0
>  #define _SPRA_TILEOFF                0x702a4
> +#define _SPRA_OFFSET         0x702a4
>  #define _SPRA_SCALE          0x70304
>  #define   SPRITE_SCALE_ENABLE        (1<<31)
>  #define   SPRITE_FILTER_MASK (3<<29)
> @@ -3207,6 +3208,7 @@
>  #define _SPRB_SURF           0x7129c
>  #define _SPRB_KEYMAX         0x712a0
>  #define _SPRB_TILEOFF                0x712a4
> +#define _SPRB_OFFSET         0x712a4
>  #define _SPRB_SCALE          0x71304
>  #define _SPRB_GAMC           0x71400
>  
> @@ -3220,6 +3222,7 @@
>  #define SPRSURF(pipe) _PIPE(pipe, _SPRA_SURF, _SPRB_SURF)
>  #define SPRKEYMAX(pipe) _PIPE(pipe, _SPRA_KEYMAX, _SPRB_KEYMAX)
>  #define SPRTILEOFF(pipe) _PIPE(pipe, _SPRA_TILEOFF, _SPRB_TILEOFF)
> +#define SPROFFSET(pipe) _PIPE(pipe, _SPRA_OFFSET, _SPRB_OFFSET)
>  #define SPRSCALE(pipe) _PIPE(pipe, _SPRA_SCALE, _SPRB_SCALE)
>  #define SPRGAMC(pipe) _PIPE(pipe, _SPRA_GAMC, _SPRB_GAMC)
>  
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c 
> b/drivers/gpu/drm/i915/intel_sprite.c
> index 176c462..24b8231 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -127,13 +127,21 @@ ivb_update_plane(struct drm_plane *plane, struct 
> drm_framebuffer *fb,
>  
>       I915_WRITE(SPRSTRIDE(pipe), fb->pitches[0]);
>       I915_WRITE(SPRPOS(pipe), (crtc_y << 16) | crtc_x);
> -     if (obj->tiling_mode != I915_TILING_NONE) {
> -             I915_WRITE(SPRTILEOFF(pipe), (y << 16) | x);
> +
> +     if (IS_HASWELL(dev)) {
> +             /* HSW consolidates SPRTILEOFF and SPRLINOFF into a single
> +              * SPROFFSET register */

I don't know if upper layers sanitize already but
x should be < 8192 and y < 4096 in here, and both <4096 for ivb.
Emit warning and clamp if they are not in range?

> +             I915_WRITE(SPROFFSET(pipe), (y << 16) | x);
>       } else {
> -             unsigned long offset;
> +             if (obj->tiling_mode != I915_TILING_NONE) {
> +                     I915_WRITE(SPRTILEOFF(pipe), (y << 16) | x);
> +             } else {
> +                     unsigned long offset;
>  
> -             offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
> -             I915_WRITE(SPRLINOFF(pipe), offset);
> +                     offset = y * fb->pitches[0] +
> +                              x * (fb->bits_per_pixel / 8);
> +                     I915_WRITE(SPRLINOFF(pipe), offset);
> +             }
>       }
>       I915_WRITE(SPRSIZE(pipe), (crtc_h << 16) | crtc_w);
>       if (intel_plane->can_scale)
> -- 
> 1.7.7.5

Reviewed-by: Mika Kuoppala <mika.kuopp...@intel.com>
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