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Date: Thu, 16 May 2024 15:18:17 +0200
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>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net,
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 1/5] drm/vkms: Create helpers macro to avoid code
duplication in format callbacks
The callback functions for line conversion are almost identical for
some format. The generic READ_LINE macro generate all the required
boilerplate to process a line.
Two overrides of this macro have been added to avoid duplication of
the same arguments every time.
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
drivers/gpu/drm/vkms/vkms_formats.c | 163 +++++++++++++-----------------------
1 file changed, 58 insertions(+), 105 deletions(-)
diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c
index 88edf773b11b..d26707cff86e 100644
--- a/drivers/gpu/drm/vkms/vkms_formats.c
+++ b/drivers/gpu/drm/vkms/vkms_formats.c
@@ -284,6 +284,58 @@ VISIBLE_IF_KUNIT struct pixel_argb_u16 argb_u16_from_yuv888(u8 y, u8 channel_1,
}
EXPORT_SYMBOL_IF_KUNIT(argb_u16_from_yuv888);
+/**
+ * READ_LINE() - Generic generator for a read_line function which can be used for format with one
+ * plane and a block_h == block_w == 1.
+ *
+ * @function_name: Function name to generate
+ * @pixel_name: temporary pixel name used in the @__VA_ARGS__ parameters
+ * @pixel_type: Used to specify the type you want to cast the pixel pointer
+ * @callback: Callback to call for each pixels. The first argument is always a
+ * &struct pixel_argb_u16
+ * @__VA_ARGS__: Argument to pass inside the callback. You can use @pixel_name to access current
+ * pixel.
+ */
+#define READ_LINE(function_name, pixel_name, pixel_type, callback, ...) \
+static void function_name(const struct vkms_plane_state *plane, int x_start, \
+ int y_start, enum pixel_read_direction direction, int count, \
+ struct pixel_argb_u16 out_pixel[]) \
+{ \
+ struct pixel_argb_u16 *end = out_pixel + count; \
+ int step = get_block_step_bytes(plane->frame_info->fb, direction, 0); \
+ u8 *src_pixels; \
+ \
+ packed_pixels_addr_1x1(plane->frame_info, x_start, y_start, 0, &src_pixels); \
+ \
+ while (out_pixel < end) { \
+ pixel_type *(pixel_name) = (pixel_type *)src_pixels; \
+ *out_pixel = (callback)(__VA_ARGS__); \
+ out_pixel += 1; \
+ src_pixels += step; \
+ } \
+}
+
+/**
+ * READ_LINE_ARGB8888() - Generic generator for ARGB8888 formats.
+ * The pixel type used is u8, so pixel_name[0]..pixel_name[n] are the n components of the pixel.
+ *
+ * @function_name: Function name to generate
+ * @pixel_name: temporary pixel to use in @a, @r, @g and @b parameters
+ * @a, @r, @g, @b: value of each channel
+ */
+#define READ_LINE_ARGB8888(function_name, pixel_name, a, r, g, b) \
+ READ_LINE(function_name, pixel_name, u8, argb_u16_from_u8888, a, r, g, b)
+/**
+ * READ_LINE_ARGB16161616() - Generic generator for ARGB16161616 formats.
+ * The pixel type used is u8, so pixel_name[0]..pixel_name[n] are the n components of the pixel.
+ *
+ * @function_name: Function name to generate
+ * @pixel_name: temporary pixel to use in @a, @r, @g and @b parameters
+ * @a, @r, @g, @b: value of each channel
+ */
+#define READ_LINE_16161616(function_name, pixel_name, a, r, g, b) \
+ READ_LINE(function_name, pixel_name, u16, argb_u16_from_u16161616, a, r, g, b)
+
/*
* The following functions are read_line function for each pixel format supported by VKMS.
*
@@ -389,118 +441,19 @@ static void R4_read_line(const struct vkms_plane_state *plane, int x_start,
Rx_read_line(plane, x_start, y_start, direction, count, out_pixel);
}
-static void R8_read_line(const struct vkms_plane_state *plane, int x_start,
- int y_start, enum pixel_read_direction direction, int count,
- struct pixel_argb_u16 out_pixel[])
-{
- struct pixel_argb_u16 *end = out_pixel + count;
- u8 *src_pixels;
- int step = get_block_step_bytes(plane->frame_info->fb, direction, 0);
-
- packed_pixels_addr_1x1(plane->frame_info, x_start, y_start, 0, &src_pixels);
-
- while (out_pixel < end) {
- *out_pixel = argb_u16_from_gray8(*src_pixels);
- src_pixels += step;
- out_pixel += 1;
- }
-}
-
-static void ARGB8888_read_line(const struct vkms_plane_state *plane, int x_start, int y_start,
- enum pixel_read_direction direction, int count,
- struct pixel_argb_u16 out_pixel[])
-{
- struct pixel_argb_u16 *end = out_pixel + count;
- u8 *src_pixels;
-
- packed_pixels_addr_1x1(plane->frame_info, x_start, y_start, 0, &src_pixels);
-
- int step = get_block_step_bytes(plane->frame_info->fb, direction, 0);
-
- while (out_pixel < end) {
- u8 *px = (u8 *)src_pixels;
- *out_pixel = argb_u16_from_u8888(px[3], px[2], px[1], px[0]);
- out_pixel += 1;
- src_pixels += step;
- }
-}
-
-static void XRGB8888_read_line(const struct vkms_plane_state *plane, int x_start, int y_start,
- enum pixel_read_direction direction, int count,
- struct pixel_argb_u16 out_pixel[])
-{
- struct pixel_argb_u16 *end = out_pixel + count;
- u8 *src_pixels;
-
- packed_pixels_addr_1x1(plane->frame_info, x_start, y_start, 0, &src_pixels);
-
- int step = get_block_step_bytes(plane->frame_info->fb, direction, 0);
-
- while (out_pixel < end) {
- u8 *px = (u8 *)src_pixels;
- *out_pixel = argb_u16_from_u8888(255, px[2], px[1], px[0]);
- out_pixel += 1;
- src_pixels += step;
- }
-}
-
-static void ARGB16161616_read_line(const struct vkms_plane_state *plane, int x_start,
- int y_start, enum pixel_read_direction direction, int count,
- struct pixel_argb_u16 out_pixel[])
-{
- struct pixel_argb_u16 *end = out_pixel + count;
- u8 *src_pixels;
- packed_pixels_addr_1x1(plane->frame_info, x_start, y_start, 0, &src_pixels);
+READ_LINE_ARGB8888(XRGB8888_read_line, px, 255, px[2], px[1], px[0])
- int step = get_block_step_bytes(plane->frame_info->fb, direction, 0);
+READ_LINE_ARGB8888(ARGB8888_read_line, px, px[3], px[2], px[1], px[0])
- while (out_pixel < end) {
- u16 *px = (u16 *)src_pixels;
- *out_pixel = argb_u16_from_u16161616(px[3], px[2], px[1], px[0]);
- out_pixel += 1;
- src_pixels += step;
- }
-}
-static void XRGB16161616_read_line(const struct vkms_plane_state *plane, int x_start,
- int y_start, enum pixel_read_direction direction, int count,
- struct pixel_argb_u16 out_pixel[])
-{
- struct pixel_argb_u16 *end = out_pixel + count;
- u8 *src_pixels;
-
- packed_pixels_addr_1x1(plane->frame_info, x_start, y_start, 0, &src_pixels);
+READ_LINE_16161616(ARGB16161616_read_line, px, px[3], px[2], px[1], px[0]);
+READ_LINE_16161616(XRGB16161616_read_line, px, 0xFFFF, px[2], px[1], px[0]);
- int step = get_block_step_bytes(plane->frame_info->fb, direction, 0);
+READ_LINE(RGB565_read_line, px, u16, argb_u16_from_RGB565, px)
- while (out_pixel < end) {
- u16 *px = (u16 *)src_pixels;
- *out_pixel = argb_u16_from_u16161616(0xFFFF, px[2], px[1], px[0]);
- out_pixel += 1;
- src_pixels += step;
- }
-}
+READ_LINE(R8_read_line, px, u8, argb_u16_from_gray8, *px)
-static void RGB565_read_line(const struct vkms_plane_state *plane, int x_start,
- int y_start, enum pixel_read_direction direction, int count,
- struct pixel_argb_u16 out_pixel[])
-{
- struct pixel_argb_u16 *end = out_pixel + count;
- u8 *src_pixels;
-
- packed_pixels_addr_1x1(plane->frame_info, x_start, y_start, 0, &src_pixels);
-
- int step = get_block_step_bytes(plane->frame_info->fb, direction, 0);
-
- while (out_pixel < end) {
- u16 *px = (u16 *)src_pixels;
-
- *out_pixel = argb_u16_from_RGB565(px);
- out_pixel += 1;
- src_pixels += step;
- }
-}
/*
* This callback can be used for YUV formats where U and V values are
--
2.43.2
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