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Message-Id: <20240313-yuv-v5-6-e610cbd03f52@bootlin.com>
Date: Wed, 13 Mar 2024 18:45:00 +0100
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
Melissa Wen <melissa.srw@...il.com>,
Maíra Canal <mairacanal@...eup.net>,
Haneen Mohammed <hamohammed.sa@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, arthurgrillo@...eup.net,
Jonathan Corbet <corbet@....net>, pekka.paalanen@...oniitty.fi
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
jeremie.dautheribes@...tlin.com, miquel.raynal@...tlin.com,
thomas.petazzoni@...tlin.com, seanpaul@...gle.com, marcheu@...gle.com,
nicolejadeyee@...gle.com, Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH v5 06/16] drm/vkms: Use const for input pointers in
pixel_read an pixel_write functions
As the pixel_read and pixel_write function should never modify the input
buffer, mark those pointers const.
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
drivers/gpu/drm/vkms/vkms_drv.h | 4 ++--
drivers/gpu/drm/vkms/vkms_formats.c | 24 ++++++++++++------------
2 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
index 4bfc62d26f08..3ead8b39af4a 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.h
+++ b/drivers/gpu/drm/vkms/vkms_drv.h
@@ -61,7 +61,7 @@ struct line_buffer {
* @out_pixel: destination address to write the pixel
* @in_pixel: pixel to write
*/
-typedef void (*pixel_write_t)(u8 *out_pixel, struct pixel_argb_u16 *in_pixel);
+typedef void (*pixel_write_t)(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel);
struct vkms_writeback_job {
struct iosys_map data[DRM_FORMAT_MAX_PLANES];
@@ -76,7 +76,7 @@ struct vkms_writeback_job {
* @in_pixel: Pointer to the pixel to read
* @out_pixel: Pointer to write the converted pixel
*/
-typedef void (*pixel_read_t)(u8 *in_pixel, struct pixel_argb_u16 *out_pixel);
+typedef void (*pixel_read_t)(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel);
/**
* vkms_plane_state - Driver specific plane state
diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c
index b57d85b8b935..b2f8dfc26c35 100644
--- a/drivers/gpu/drm/vkms/vkms_formats.c
+++ b/drivers/gpu/drm/vkms/vkms_formats.c
@@ -76,7 +76,7 @@ static int get_x_position(const struct vkms_frame_info *frame_info, int limit, i
* They are used in the `vkms_compose_row` function to handle multiple formats.
*/
-static void ARGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
+static void ARGB8888_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
/*
* The 257 is the "conversion ratio". This number is obtained by the
@@ -90,7 +90,7 @@ static void ARGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
out_pixel->b = (u16)in_pixel[0] * 257;
}
-static void XRGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
+static void XRGB8888_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
out_pixel->a = (u16)0xffff;
out_pixel->r = (u16)in_pixel[2] * 257;
@@ -98,7 +98,7 @@ static void XRGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
out_pixel->b = (u16)in_pixel[0] * 257;
}
-static void ARGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
+static void ARGB16161616_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
u16 *pixel = (u16 *)in_pixel;
@@ -108,7 +108,7 @@ static void ARGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pi
out_pixel->b = le16_to_cpu(pixel[0]);
}
-static void XRGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
+static void XRGB16161616_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
u16 *pixel = (u16 *)in_pixel;
@@ -118,7 +118,7 @@ static void XRGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pi
out_pixel->b = le16_to_cpu(pixel[0]);
}
-static void RGB565_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
+static void RGB565_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
u16 *pixel = (u16 *)in_pixel;
@@ -143,7 +143,7 @@ static void RGB565_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
* It is used to avoid null pointer to be used as a function. In theory, this function should
* never be called, except if you found a bug in the driver/DRM core.
*/
-static void black_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
+static void black_to_argb_u16(const u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
out_pixel->a = (u16)0xFFFF;
out_pixel->r = 0;
@@ -189,7 +189,7 @@ void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state
* They are used in the `vkms_writeback_row` to convert and store a pixel from the src_buffer to
* the writeback buffer.
*/
-static void argb_u16_to_ARGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_ARGB8888(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel)
{
/*
* This sequence below is important because the format's byte order is
@@ -207,7 +207,7 @@ static void argb_u16_to_ARGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
out_pixel[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257);
}
-static void argb_u16_to_XRGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_XRGB8888(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel)
{
out_pixel[3] = 0xff;
out_pixel[2] = DIV_ROUND_CLOSEST(in_pixel->r, 257);
@@ -215,7 +215,7 @@ static void argb_u16_to_XRGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
out_pixel[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257);
}
-static void argb_u16_to_ARGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_ARGB16161616(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel)
{
u16 *pixel = (u16 *)out_pixel;
@@ -225,7 +225,7 @@ static void argb_u16_to_ARGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pi
pixel[0] = cpu_to_le16(in_pixel->b);
}
-static void argb_u16_to_XRGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_XRGB16161616(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel)
{
u16 *pixel = (u16 *)out_pixel;
@@ -235,7 +235,7 @@ static void argb_u16_to_XRGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pi
pixel[0] = cpu_to_le16(in_pixel->b);
}
-static void argb_u16_to_RGB565(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_RGB565(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel)
{
u16 *pixel = (u16 *)out_pixel;
@@ -260,7 +260,7 @@ static void argb_u16_to_RGB565(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
* It is used to avoid null pointer to be used as a function. In theory, this should never
* happen, except if there is a bug in the driver
*/
-static void argb_u16_to_nothing(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_nothing(u8 *out_pixel, const struct pixel_argb_u16 *in_pixel)
{}
/**
--
2.43.0
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