On 19/11/2019 09:56, Ville Syrjälä wrote:
On Tue, Nov 19, 2019 at 09:45:26AM -0500, mikita.lipski@xxxxxxx wrote:
From: Mikita Lipski <mikita.lipski@xxxxxxx>
We shouldn't compare int with unsigned long to find the max value
and since we are not expecting negative value returned from
compute_offset we should make this function return unsigned long
so we can compare the values when computing rc parameters.
Why are there other unsigned longs in dsc parameter computation
in the first place?
I believe it was initially set to be unsigned long for variable
consistency, when we ported intel_compute_rc_parameters into
drm_dsc_compute_rc_parameters. But now that I look at it, we can
actually just set them to u32 or u64, as nothing should exceed that.
Cc: Nikola Cornij <nikola.cornij@xxxxxxx>
Cc: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Mikita Lipski <mikita.lipski@xxxxxxx>
---
drivers/gpu/drm/drm_dsc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_dsc.c b/drivers/gpu/drm/drm_dsc.c
index 74f3527f567d..ec40604ab6a2 100644
--- a/drivers/gpu/drm/drm_dsc.c
+++ b/drivers/gpu/drm/drm_dsc.c
@@ -245,11 +245,11 @@ void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload,
}
EXPORT_SYMBOL(drm_dsc_pps_payload_pack);
-static int compute_offset(struct drm_dsc_config *vdsc_cfg, int pixels_per_group,
+static unsigned long compute_offset(struct drm_dsc_config *vdsc_cfg, int pixels_per_group,
int groups_per_line, int grpcnt)
{
- int offset = 0;
- int grpcnt_id = DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay, pixels_per_group);
+ unsigned long offset = 0;
+ unsigned long grpcnt_id = DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay, pixels_per_group);
if (grpcnt <= grpcnt_id)
offset = DIV_ROUND_UP(grpcnt * pixels_per_group * vdsc_cfg->bits_per_pixel, 16);
--
2.17.1
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--
Thanks,
Mikita Lipski
Software Engineer 2, AMD
mikita.lipski@xxxxxxx
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