* [PATCH] amdgpu/dc: use kernel ilog2 for log_2.
@ 2017-10-03 3:14 Dave Airlie
[not found] ` <20171003031436.20269-1-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Dave Airlie @ 2017-10-03 3:14 UTC (permalink / raw)
To: amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW
From: Dave Airlie <airlied@redhat.com>
This should produce the same result.
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/amd/display/dc/basics/conversion.c | 10 ----------
drivers/gpu/drm/amd/display/dc/basics/conversion.h | 5 ++++-
2 files changed, 4 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
index a2e22ae..23c9a0e 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
@@ -102,13 +102,3 @@ void convert_float_matrix(
matrix[i] = (uint16_t)reg_value;
}
}
-
-unsigned int log_2(unsigned int num)
-{
- unsigned int result = 0;
-
- while ((num >>= 1) != 0)
- result++;
-
- return result;
-}
diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.h b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
index 189325f..ade785c 100644
--- a/drivers/gpu/drm/amd/display/dc/basics/conversion.h
+++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
@@ -38,6 +38,9 @@ void convert_float_matrix(
struct fixed31_32 *flt,
uint32_t buffer_size);
-unsigned int log_2(unsigned int num);
+static inline unsigned int log_2(unsigned int num)
+{
+ return ilog2(num);
+}
#endif
--
2.9.5
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] amdgpu/dc: use kernel ilog2 for log_2.
[not found] ` <20171003031436.20269-1-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
@ 2017-10-03 13:52 ` Harry Wentland
0 siblings, 0 replies; 2+ messages in thread
From: Harry Wentland @ 2017-10-03 13:52 UTC (permalink / raw)
To: Dave Airlie, amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW
On 2017-10-02 11:14 PM, Dave Airlie wrote:
> From: Dave Airlie <airlied@redhat.com>
>
> This should produce the same result.
>
> Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Harry
> ---
> drivers/gpu/drm/amd/display/dc/basics/conversion.c | 10 ----------
> drivers/gpu/drm/amd/display/dc/basics/conversion.h | 5 ++++-
> 2 files changed, 4 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.c b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
> index a2e22ae..23c9a0e 100644
> --- a/drivers/gpu/drm/amd/display/dc/basics/conversion.c
> +++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.c
> @@ -102,13 +102,3 @@ void convert_float_matrix(
> matrix[i] = (uint16_t)reg_value;
> }
> }
> -
> -unsigned int log_2(unsigned int num)
> -{
> - unsigned int result = 0;
> -
> - while ((num >>= 1) != 0)
> - result++;
> -
> - return result;
> -}
> diff --git a/drivers/gpu/drm/amd/display/dc/basics/conversion.h b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
> index 189325f..ade785c 100644
> --- a/drivers/gpu/drm/amd/display/dc/basics/conversion.h
> +++ b/drivers/gpu/drm/amd/display/dc/basics/conversion.h
> @@ -38,6 +38,9 @@ void convert_float_matrix(
> struct fixed31_32 *flt,
> uint32_t buffer_size);
>
> -unsigned int log_2(unsigned int num);
> +static inline unsigned int log_2(unsigned int num)
> +{
> + return ilog2(num);
> +}
>
> #endif
>
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2017-10-03 3:14 [PATCH] amdgpu/dc: use kernel ilog2 for log_2 Dave Airlie
[not found] ` <20171003031436.20269-1-airlied-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-10-03 13:52 ` Harry Wentland
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