On Wed, 13 Mar 2024 18:45:10 +0100 Louis Chauvet <louis.chauvet@xxxxxxxxxxx> wrote: > This add the support for: > - R1/R2/R4/R8 > > R1 format was tested with [1] and [2]. > > [1]: https://lore.kernel.org/r/20240313-new_rotation-v2-0-6230fd5cae59@xxxxxxxxxxx > [2]: https://lore.kernel.org/igt-dev/20240306-b4-kms_tests-v1-0-8fe451efd2ac@xxxxxxxxxxx/ > > Signed-off-by: Louis Chauvet <louis.chauvet@xxxxxxxxxxx> > --- > drivers/gpu/drm/vkms/vkms_formats.c | 100 ++++++++++++++++++++++++++++++++++++ > drivers/gpu/drm/vkms/vkms_plane.c | 6 ++- > 2 files changed, 105 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c > index 863fc91d6d48..cbb2ec09564a 100644 > --- a/drivers/gpu/drm/vkms/vkms_formats.c > +++ b/drivers/gpu/drm/vkms/vkms_formats.c > @@ -201,6 +201,11 @@ static struct pixel_argb_u16 argb_u16_from_RGB565(const u16 *pixel) > return out_pixel; > } > > +static struct pixel_argb_u16 argb_u16_from_gray8(u8 gray) > +{ > + return argb_u16_from_u8888(255, gray, gray, gray); > +} > + > VISIBLE_IF_KUNIT struct pixel_argb_u16 argb_u16_from_yuv888(u8 y, u8 cb, u8 cr, > struct conversion_matrix *matrix) > { > @@ -269,6 +274,89 @@ static void black_to_argb_u16(const struct vkms_plane_state *plane, int x_start, > } > } > > +static void Rx_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[], u8 bit_per_pixel, u8 lum_per_level) > +{ > + struct pixel_argb_u16 *end = out_pixel + count; > + u8 *src_pixels; > + int rem_x, rem_y; > + > + packed_pixels_addr(plane->frame_info, x_start, y_start, 0, &src_pixels, &rem_x, &rem_y); Maybe assert that rem_y = 0? Or block_h = 1. > + int bit_offset = (int)rem_x * bit_per_pixel; Why cast rem_x to int when it was defined to be int? > + int step = get_step_next_block(plane->frame_info->fb, direction, 0); > + int mask = (0x1 << bit_per_pixel) - 1; Since mask will interact with u8, it should be unsigned too. > + > + if (direction == READ_LEFT_TO_RIGHT || direction == READ_RIGHT_TO_LEFT) { > + int restart_bit_offset = 0; > + int step_bit_offset = bit_per_pixel; > + > + if (direction == READ_RIGHT_TO_LEFT) { > + restart_bit_offset = 8 - bit_per_pixel; > + step_bit_offset = -bit_per_pixel; > + } > + > + while (out_pixel < end) { > + u8 val = (*src_pixels & (mask << bit_offset)) >> bit_offset; or shorter: (*src_pixels >> bit_offset) & mask However, shouldn't the first pixel be on the high bits? That how I would understand the comments in drm_fourcc.h. Again a reason to avoid a solid color fill in IGT. > + > + *out_pixel = argb_u16_from_gray8(val * lum_per_level); > + > + bit_offset += step_bit_offset; > + if (bit_offset < 0 || 8 <= bit_offset) { > + bit_offset = restart_bit_offset; > + src_pixels += step; > + } > + out_pixel += 1; > + } > + } else if (direction == READ_TOP_TO_BOTTOM || direction == READ_BOTTOM_TO_TOP) { > + while (out_pixel < end) { > + u8 val = (*src_pixels & (mask << bit_offset)) >> bit_offset; > + *out_pixel = argb_u16_from_gray8(val * lum_per_level); > + src_pixels += step; > + out_pixel += 1; > + } > + } > +} > + > +static void R1_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[]) > +{ > + Rx_read_line(plane, x_start, y_start, direction, count, out_pixel, 1, 0xFF); > +} > + > +static void R2_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[]) > +{ > + Rx_read_line(plane, x_start, y_start, direction, count, out_pixel, 2, 0x55); > +} > + > +static void R4_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[]) > +{ > + Rx_read_line(plane, x_start, y_start, direction, count, out_pixel, 4, 0x11); > +} > + > +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 rem_x, rem_y; > + int step = get_step_next_block(plane->frame_info->fb, direction, 0); > + > + packed_pixels_addr(plane->frame_info, x_start, y_start, 0, &src_pixels, &rem_x, &rem_y); Assert on block size? > + > + 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[]) > @@ -582,6 +670,14 @@ pixel_read_line_t get_pixel_read_line_function(u32 format) > case DRM_FORMAT_YVU422: > case DRM_FORMAT_YVU444: > return &planar_yuv_read_line; > + case DRM_FORMAT_R1: > + return &R1_read_line; > + case DRM_FORMAT_R2: > + return &R2_read_line; > + case DRM_FORMAT_R4: > + return &R4_read_line; > + case DRM_FORMAT_R8: > + return &R8_read_line; > default: > /* > * This is a bug in vkms_plane_atomic_check. All the supported > @@ -855,6 +951,10 @@ get_conversion_matrix_to_argb_u16(u32 format, enum drm_color_encoding encoding, > case DRM_FORMAT_ARGB16161616: > case DRM_FORMAT_XRGB16161616: > case DRM_FORMAT_RGB565: > + case DRM_FORMAT_R1: > + case DRM_FORMAT_R2: > + case DRM_FORMAT_R4: > + case DRM_FORMAT_R8: > /* > * Those formats are supported, but they don't need a conversion matrix. Return It is strange that you need to list irrelevant formats here. > * a valid pointer to avoid kernel panic in case this matrix is used/checked > diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c > index e21cc92cf497..dc9d62acf350 100644 > --- a/drivers/gpu/drm/vkms/vkms_plane.c > +++ b/drivers/gpu/drm/vkms/vkms_plane.c > @@ -29,7 +29,11 @@ static const u32 vkms_formats[] = { > DRM_FORMAT_YUV444, > DRM_FORMAT_YVU420, > DRM_FORMAT_YVU422, > - DRM_FORMAT_YVU444 > + DRM_FORMAT_YVU444, > + DRM_FORMAT_R1, > + DRM_FORMAT_R2, > + DRM_FORMAT_R4, > + DRM_FORMAT_R8 > }; > > static struct drm_plane_state * > Thanks, pq
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