From 32cddf9c94d81c4cd3c63fd1fe8ea9b98feac7e5 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, 28 May 2019 13:02:18 -0400
Subject: [PATCH] media: v4l2-common: Add an helper to apply frmsize
constraints
The rockchip VPU driver is open-coding this logic which seems pretty
generic. Let's provide an helper to apply the min/max and alignment
constraints on width/height.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---
drivers/media/v4l2-core/v4l2-common.c | 27 +++++++++++++++++++++++++++
include/media/v4l2-common.h | 2 ++
2 files changed, 29 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 6ee9fa3bdb18..f8ad1c580a3e 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -321,6 +321,16 @@ static unsigned int clamp_align(unsigned int x, unsigned int min,
return x;
}
+static unsigned int clamp_roundup(unsigned int x, unsigned int min,
+ unsigned int max, unsigned int alignment)
+{
+ x = clamp(x, min, max);
+ if (alignment)
+ x = round_up(x, alignment);
+
+ return x;
+}
+
void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
unsigned int walign,
u32 *h, unsigned int hmin, unsigned int hmax,
@@ -531,6 +541,23 @@ static inline unsigned int v4l2_format_block_height(const struct v4l2_format_inf
return info->block_h[plane];
}
+void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
+ const struct v4l2_frmsize_stepwise *frmsize)
+{
+ if (!frmsize)
+ return;
+
+ /*
+ * Clamp width/height to meet min/max constraints and round it up to
+ * macroblock alignment.
+ */
+ *width = clamp_roundup(*width, frmsize->min_width, frmsize->max_width,
+ frmsize->step_width);
+ *height = clamp_roundup(*height, frmsize->min_height, frmsize->max_height,
+ frmsize->step_height);
+}
+EXPORT_SYMBOL_GPL(v4l2_apply_frmsize_constraints);
+
int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt,
u32 pixelformat, u32 width, u32 height)
{
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 3226bc8107cc..e826b154bc35 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -420,6 +420,8 @@ struct v4l2_format_info {
const struct v4l2_format_info *v4l2_format_info(u32 format);
+void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
+ const struct v4l2_frmsize_stepwise *frmsize);
int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat,
u32 width, u32 height);
int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat,
--
2.30.9