Re: [Intel-gfx] [PATCH 14/15] drm/i915: Relax 845/865 CURBASE alignemnt requirement to 32 bytes

[Imre Deak]

On Mon, Mar 27, 2017 at 09:55:45PM +0300, ville.syrj...@linux.intel.com wrote:
> From: Ville Syrjälä 
> 
> Supposedly 845/865 require only 32 byte alignment for CURBASE. Let's
> relax the checks to allow that instead of demanding 4KiB alignment.
> This will allow cursor panning in 8 pixel units.
> 
> Signed-off-by: Ville Syrjälä 

Reviewed-by: Imre Deak 

> ---
>  drivers/gpu/drm/i915/intel_display.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c 
> b/drivers/gpu/drm/i915/intel_display.c
> index 420d306e31c9..d78ab0d35274 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2090,6 +2090,8 @@ static unsigned int intel_cursor_alignment(const struct 
> drm_i915_private *dev_pr
>   return 16 * 1024;
>   else if (IS_I85X(dev_priv))
>   return 256;
> + else if (IS_I845G(dev_priv) || IS_I865G(dev_priv))
> + return 32;
>   else
>   return 4 * 1024;
>  }
> -- 
> 2.10.2
> 
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[Intel-gfx] [PATCH 14/15] drm/i915: Relax 845/865 CURBASE alignemnt requirement to 32 bytes

[ville . syrjala]

From: Ville Syrjälä 

Supposedly 845/865 require only 32 byte alignment for CURBASE. Let's
relax the checks to allow that instead of demanding 4KiB alignment.
This will allow cursor panning in 8 pixel units.

Signed-off-by: Ville Syrjälä 
---
 drivers/gpu/drm/i915/intel_display.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 420d306e31c9..d78ab0d35274 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2090,6 +2090,8 @@ static unsigned int intel_cursor_alignment(const struct 
drm_i915_private *dev_pr
return 16 * 1024;
else if (IS_I85X(dev_priv))
return 256;
+   else if (IS_I845G(dev_priv) || IS_I865G(dev_priv))
+   return 32;
else
return 4 * 1024;
 }
-- 
2.10.2

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