@@ -53,12 +53,31 @@ struct line_buffer {
struct pixel_argb_u16 *pixels;
};
+/**
+ * typedef pixel_write_t - These functions are used to read a pixel from a
+ * `struct pixel_argb_u16*`, convert it in a specific format and write it in the @dst_pixels
+ * 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);
+
struct vkms_writeback_job {
struct iosys_map data[DRM_FORMAT_MAX_PLANES];
struct vkms_frame_info wb_frame_info;
- void (*pixel_write)(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel);
+ pixel_write_t pixel_write;
};
+/**
+ * typedef pixel_read_t - These functions are used to read a pixel in the source frame,
+ * convert it to `struct pixel_argb_u16` and write it to @out_pixel.
+ *
+ * @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);
+
/**
* vkms_plane_state - Driver specific plane state
* @base: base plane state
@@ -69,7 +88,7 @@ struct vkms_writeback_job {
struct vkms_plane_state {
struct drm_shadow_plane_state base;
struct vkms_frame_info *frame_info;
- void (*pixel_read)(u8 *src_buffer, struct pixel_argb_u16 *out_pixel);
+ pixel_read_t pixel_read;
};
struct vkms_plane {
@@ -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 *src_pixels, struct pixel_argb_u16 *out_pixel)
+static void ARGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
/*
* The 257 is the "conversion ratio". This number is obtained by the
@@ -84,48 +84,48 @@ static void ARGB8888_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixe
* the best color value in a pixel format with more possibilities.
* A similar idea applies to others RGB color conversions.
*/
- out_pixel->a = (u16)src_pixels[3] * 257;
- out_pixel->r = (u16)src_pixels[2] * 257;
- out_pixel->g = (u16)src_pixels[1] * 257;
- out_pixel->b = (u16)src_pixels[0] * 257;
+ out_pixel->a = (u16)in_pixel[3] * 257;
+ out_pixel->r = (u16)in_pixel[2] * 257;
+ out_pixel->g = (u16)in_pixel[1] * 257;
+ out_pixel->b = (u16)in_pixel[0] * 257;
}
-static void XRGB8888_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel)
+static void XRGB8888_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
out_pixel->a = (u16)0xffff;
- out_pixel->r = (u16)src_pixels[2] * 257;
- out_pixel->g = (u16)src_pixels[1] * 257;
- out_pixel->b = (u16)src_pixels[0] * 257;
+ out_pixel->r = (u16)in_pixel[2] * 257;
+ out_pixel->g = (u16)in_pixel[1] * 257;
+ out_pixel->b = (u16)in_pixel[0] * 257;
}
-static void ARGB16161616_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel)
+static void ARGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
- u16 *pixels = (u16 *)src_pixels;
+ u16 *pixel = (u16 *)in_pixel;
- out_pixel->a = le16_to_cpu(pixels[3]);
- out_pixel->r = le16_to_cpu(pixels[2]);
- out_pixel->g = le16_to_cpu(pixels[1]);
- out_pixel->b = le16_to_cpu(pixels[0]);
+ out_pixel->a = le16_to_cpu(pixel[3]);
+ out_pixel->r = le16_to_cpu(pixel[2]);
+ out_pixel->g = le16_to_cpu(pixel[1]);
+ out_pixel->b = le16_to_cpu(pixel[0]);
}
-static void XRGB16161616_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel)
+static void XRGB16161616_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
- u16 *pixels = (u16 *)src_pixels;
+ u16 *pixel = (u16 *)in_pixel;
out_pixel->a = (u16)0xffff;
- out_pixel->r = le16_to_cpu(pixels[2]);
- out_pixel->g = le16_to_cpu(pixels[1]);
- out_pixel->b = le16_to_cpu(pixels[0]);
+ out_pixel->r = le16_to_cpu(pixel[2]);
+ out_pixel->g = le16_to_cpu(pixel[1]);
+ out_pixel->b = le16_to_cpu(pixel[0]);
}
-static void RGB565_to_argb_u16(u8 *src_pixels, struct pixel_argb_u16 *out_pixel)
+static void RGB565_to_argb_u16(u8 *in_pixel, struct pixel_argb_u16 *out_pixel)
{
- u16 *pixels = (u16 *)src_pixels;
+ u16 *pixel = (u16 *)in_pixel;
s64 fp_rb_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(31));
s64 fp_g_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(63));
- u16 rgb_565 = le16_to_cpu(*pixels);
+ u16 rgb_565 = le16_to_cpu(*pixel);
s64 fp_r = drm_int2fixp((rgb_565 >> 11) & 0x1f);
s64 fp_g = drm_int2fixp((rgb_565 >> 5) & 0x3f);
s64 fp_b = drm_int2fixp(rgb_565 & 0x1f);
@@ -169,12 +169,12 @@ void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state
/*
* The following functions take one argb_u16 pixel and convert it to a specific format. The
- * result is stored in @dst_pixels.
+ * result is stored in @out_pixel.
*
* 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 *dst_pixels, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_ARGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
{
/*
* This sequence below is important because the format's byte order is
@@ -186,43 +186,43 @@ static void argb_u16_to_ARGB8888(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel
* | Addr + 2 | = Red channel
* | Addr + 3 | = Alpha channel
*/
- dst_pixels[3] = DIV_ROUND_CLOSEST(in_pixel->a, 257);
- dst_pixels[2] = DIV_ROUND_CLOSEST(in_pixel->r, 257);
- dst_pixels[1] = DIV_ROUND_CLOSEST(in_pixel->g, 257);
- dst_pixels[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257);
+ out_pixel[3] = DIV_ROUND_CLOSEST(in_pixel->a, 257);
+ out_pixel[2] = DIV_ROUND_CLOSEST(in_pixel->r, 257);
+ out_pixel[1] = DIV_ROUND_CLOSEST(in_pixel->g, 257);
+ out_pixel[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257);
}
-static void argb_u16_to_XRGB8888(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_XRGB8888(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
{
- dst_pixels[3] = 0xff;
- dst_pixels[2] = DIV_ROUND_CLOSEST(in_pixel->r, 257);
- dst_pixels[1] = DIV_ROUND_CLOSEST(in_pixel->g, 257);
- dst_pixels[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257);
+ out_pixel[3] = 0xff;
+ out_pixel[2] = DIV_ROUND_CLOSEST(in_pixel->r, 257);
+ out_pixel[1] = DIV_ROUND_CLOSEST(in_pixel->g, 257);
+ out_pixel[0] = DIV_ROUND_CLOSEST(in_pixel->b, 257);
}
-static void argb_u16_to_ARGB16161616(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_ARGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
{
- u16 *pixels = (u16 *)dst_pixels;
+ u16 *pixel = (u16 *)out_pixel;
- pixels[3] = cpu_to_le16(in_pixel->a);
- pixels[2] = cpu_to_le16(in_pixel->r);
- pixels[1] = cpu_to_le16(in_pixel->g);
- pixels[0] = cpu_to_le16(in_pixel->b);
+ pixel[3] = cpu_to_le16(in_pixel->a);
+ pixel[2] = cpu_to_le16(in_pixel->r);
+ pixel[1] = cpu_to_le16(in_pixel->g);
+ pixel[0] = cpu_to_le16(in_pixel->b);
}
-static void argb_u16_to_XRGB16161616(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_XRGB16161616(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
{
- u16 *pixels = (u16 *)dst_pixels;
+ u16 *pixel = (u16 *)out_pixel;
- pixels[3] = 0xffff;
- pixels[2] = cpu_to_le16(in_pixel->r);
- pixels[1] = cpu_to_le16(in_pixel->g);
- pixels[0] = cpu_to_le16(in_pixel->b);
+ pixel[3] = 0xffff;
+ pixel[2] = cpu_to_le16(in_pixel->r);
+ pixel[1] = cpu_to_le16(in_pixel->g);
+ pixel[0] = cpu_to_le16(in_pixel->b);
}
-static void argb_u16_to_RGB565(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel)
+static void argb_u16_to_RGB565(u8 *out_pixel, struct pixel_argb_u16 *in_pixel)
{
- u16 *pixels = (u16 *)dst_pixels;
+ u16 *pixel = (u16 *)out_pixel;
s64 fp_rb_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(31));
s64 fp_g_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(63));
@@ -235,7 +235,7 @@ static void argb_u16_to_RGB565(u8 *dst_pixels, struct pixel_argb_u16 *in_pixel)
u16 g = drm_fixp2int(drm_fixp_div(fp_g, fp_g_ratio));
u16 b = drm_fixp2int(drm_fixp_div(fp_b, fp_rb_ratio));
- *pixels = cpu_to_le16(r << 11 | g << 5 | b);
+ *pixel = cpu_to_le16(r << 11 | g << 5 | b);
}
/**
@@ -266,7 +266,7 @@ void vkms_writeback_row(struct vkms_writeback_job *wb,
*
* @format: DRM_FORMAT_* value for which to obtain a conversion function (see [drm_fourcc.h])
*/
-void *get_pixel_conversion_function(u32 format)
+pixel_read_t get_pixel_read_function(u32 format)
{
switch (format) {
case DRM_FORMAT_ARGB8888:
@@ -280,7 +280,15 @@ void *get_pixel_conversion_function(u32 format)
case DRM_FORMAT_RGB565:
return &RGB565_to_argb_u16;
default:
- return NULL;
+ /*
+ * This is a bug in vkms_plane_atomic_check. All the supported
+ * format must:
+ * - Be listed in vkms_formats in vkms_plane.c
+ * - Have a pixel_read callback defined here
+ */
+ WARN(true, "Pixel format %4cc is not supported by VKMS planes. This is a kernel bug, atomic check must forbid this configuration.\n",
+ format);
+ return (pixel_read_t)NULL;
}
}
@@ -291,7 +299,7 @@ void *get_pixel_conversion_function(u32 format)
*
* @format: DRM_FORMAT_* value for which to obtain a conversion function (see [drm_fourcc.h])
*/
-void *get_pixel_write_function(u32 format)
+pixel_write_t get_pixel_write_function(u32 format)
{
switch (format) {
case DRM_FORMAT_ARGB8888:
@@ -305,6 +313,14 @@ void *get_pixel_write_function(u32 format)
case DRM_FORMAT_RGB565:
return &argb_u16_to_RGB565;
default:
- return NULL;
+ /*
+ * This is a bug in vkms_writeback_atomic_check. All the supported
+ * format must:
+ * - Be listed in vkms_wb_formats in vkms_writeback.c
+ * - Have a pixel_write callback defined here
+ */
+ WARN(true, "Pixel format %4cc is not supported by VKMS writeback. This is a kernel bug, atomic check must forbid this configuration.\n",
+ format);
+ return (pixel_write_t)NULL;
}
}
@@ -5,8 +5,8 @@
#include "vkms_drv.h"
-void *get_pixel_conversion_function(u32 format);
+pixel_read_t get_pixel_read_function(u32 format);
-void *get_pixel_write_function(u32 format);
+pixel_write_t get_pixel_write_function(u32 format);
#endif /* _VKMS_FORMATS_H_ */
@@ -125,7 +125,7 @@ static void vkms_plane_atomic_update(struct drm_plane *plane,
drm_rect_rotate(&frame_info->rotated, drm_rect_width(&frame_info->rotated),
drm_rect_height(&frame_info->rotated), frame_info->rotation);
- vkms_plane_state->pixel_read = get_pixel_conversion_function(fmt);
+ vkms_plane_state->pixel_read = get_pixel_read_function(fmt);
}
static int vkms_plane_atomic_check(struct drm_plane *plane,