On Tuesday, October 3, 2023 10:22:44 AM EDT Jocelyn Falempe wrote:
> drm_panic will need the low-level drm_fb_xxxx_line functions.
> Also add drm_fb_r1_to_xrgb8888 to render the fonts.
>
> Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_format_helper.c | 88 ++++++++++++++++++++++++++---
> include/drm/drm_format_helper.h | 9 +++
> 2 files changed, 89 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
> index f93a4efcee90..c238e5d84f1f 100644
> --- a/drivers/gpu/drm/drm_format_helper.c
> +++ b/drivers/gpu/drm/drm_format_helper.c
> @@ -270,7 +270,30 @@ void drm_fb_swab(struct iosys_map *dst, const unsigned int *dst_pitch,
>
> drm_fb_xfrm(dst, dst_pitch, &cpp, src, fb, clip, cached, swab_line);
> }
> -EXPORT_SYMBOL(drm_fb_swab);
I had to add this line back to get it to build, but once I did, it worked.
> +
> +/**
> + * drm_fb_r1_to_32bit_line - Convert one line from monochrome to any 32bit pixel format
> + * @dbuf: Pointer to the destination line (in any 32bit format)
> + * @sbuf: Pointer to the source line (in monochrome)
> + * @pixels: Number of pixels to convert.
> + * @fg_color: Foreground color, applied when R1 is 1
> + * @bg_color: Background color, applied when R1 is 0
> + *
> + * Convert monochrome to any format with 32bit pixel.
> + * There is a limitation, as sbuf is a pointer, it can only points to a multiple
> + * of 8 pixels in the source buffer.
> + */
> +void drm_fb_r1_to_32bit_line(void *dbuf, const void *sbuf, unsigned int pixels,
> + u32 fg_color, u32 bg_color)
> +{
> + unsigned int x;
> + const u8 *sbuf8 = sbuf;
> + u32 *dubf32 = dbuf;
> +
> + for (x = 0; x < pixels; x++)
> + dubf32[x] = (sbuf8[x / 8] & (0x80 >> (x % 8))) ? fg_color : bg_color;
> +}
> +EXPORT_SYMBOL(drm_fb_r1_to_32bit_line);
>
> static void drm_fb_xrgb8888_to_rgb332_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> @@ -320,7 +343,13 @@ void drm_fb_xrgb8888_to_rgb332(struct iosys_map *dst, const unsigned int *dst_pi
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb332);
>
> -static void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +/**
> + * drm_fb_xrgb8888_to_rgb565_line - Convert one line from XRGB8888 to RGB565
> + * @dbuf: Pointer to the destination line (in RGB565)
> + * @sbuf: Pointer to the source line (in XRGB8888)
> + * @pixels: Number of pixels to convert.
> + */
> +void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> __le16 *dbuf16 = dbuf;
> const __le32 *sbuf32 = sbuf;
> @@ -336,6 +365,7 @@ static void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigne
> dbuf16[x] = cpu_to_le16(val16);
> }
> }
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565_line);
>
> /* TODO: implement this helper as conversion to RGB565|BIG_ENDIAN */
> static void drm_fb_xrgb8888_to_rgb565_swab_line(void *dbuf, const void *sbuf,
> @@ -396,7 +426,13 @@ void drm_fb_xrgb8888_to_rgb565(struct iosys_map *dst, const unsigned int *dst_pi
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565);
>
> -static void drm_fb_xrgb8888_to_xrgb1555_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +/**
> + * drm_fb_xrgb8888_to_rgb565_line - Convert one line from XRGB8888 to XRGB1555
> + * @dbuf: Pointer to the destination line (in XRGB1555)
> + * @sbuf: Pointer to the source line (in XRGB8888)
> + * @pixels: Number of pixels to convert.
> + */
> +void drm_fb_xrgb8888_to_xrgb1555_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> __le16 *dbuf16 = dbuf;
> const __le32 *sbuf32 = sbuf;
> @@ -412,6 +448,7 @@ static void drm_fb_xrgb8888_to_xrgb1555_line(void *dbuf, const void *sbuf, unsig
> dbuf16[x] = cpu_to_le16(val16);
> }
> }
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb1555_line);
>
> /**
> * drm_fb_xrgb8888_to_xrgb1555 - Convert XRGB8888 to XRGB1555 clip buffer
> @@ -447,7 +484,13 @@ void drm_fb_xrgb8888_to_xrgb1555(struct iosys_map *dst, const unsigned int *dst_
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb1555);
>
> -static void drm_fb_xrgb8888_to_argb1555_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +/**
> + * drm_fb_xrgb8888_to_rgb565_line - Convert one line from XRGB8888 to ARGB1555
> + * @dbuf: Pointer to the destination line (in ARGB1555)
> + * @sbuf: Pointer to the source line (in XRGB8888)
> + * @pixels: Number of pixels to convert.
> + */
> +void drm_fb_xrgb8888_to_argb1555_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> __le16 *dbuf16 = dbuf;
> const __le32 *sbuf32 = sbuf;
> @@ -464,6 +507,7 @@ static void drm_fb_xrgb8888_to_argb1555_line(void *dbuf, const void *sbuf, unsig
> dbuf16[x] = cpu_to_le16(val16);
> }
> }
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_argb1555_line);
>
> /**
> * drm_fb_xrgb8888_to_argb1555 - Convert XRGB8888 to ARGB1555 clip buffer
> @@ -499,7 +543,13 @@ void drm_fb_xrgb8888_to_argb1555(struct iosys_map *dst, const unsigned int *dst_
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_argb1555);
>
> -static void drm_fb_xrgb8888_to_rgba5551_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +/**
> + * drm_fb_xrgb8888_to_rgba5551_line - Convert one line from XRGB8888 to ARGB5551
> + * @dbuf: Pointer to the destination line (in ARGB5551)
> + * @sbuf: Pointer to the source line (in XRGB8888)
> + * @pixels: Number of pixels to convert.
> + */
> +void drm_fb_xrgb8888_to_rgba5551_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> __le16 *dbuf16 = dbuf;
> const __le32 *sbuf32 = sbuf;
> @@ -516,6 +566,7 @@ static void drm_fb_xrgb8888_to_rgba5551_line(void *dbuf, const void *sbuf, unsig
> dbuf16[x] = cpu_to_le16(val16);
> }
> }
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgba5551_line);
>
> /**
> * drm_fb_xrgb8888_to_rgba5551 - Convert XRGB8888 to RGBA5551 clip buffer
> @@ -551,7 +602,13 @@ void drm_fb_xrgb8888_to_rgba5551(struct iosys_map *dst, const unsigned int *dst_
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgba5551);
>
> -static void drm_fb_xrgb8888_to_rgb888_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +/**
> + * drm_fb_xrgb8888_to_rgb888_line - Convert one line from XRGB8888 to RGB888
> + * @dbuf: Pointer to the destination line (in RGB888)
> + * @sbuf: Pointer to the source line (in XRGB8888)
> + * @pixels: Number of pixels to convert.
> + */
> +void drm_fb_xrgb8888_to_rgb888_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> u8 *dbuf8 = dbuf;
> const __le32 *sbuf32 = sbuf;
> @@ -566,6 +623,7 @@ static void drm_fb_xrgb8888_to_rgb888_line(void *dbuf, const void *sbuf, unsigne
> *dbuf8++ = (pix & 0x00FF0000) >> 16;
> }
> }
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888_line);
>
> /**
> * drm_fb_xrgb8888_to_rgb888 - Convert XRGB8888 to RGB888 clip buffer
> @@ -709,7 +767,13 @@ static void drm_fb_xrgb8888_to_xbgr8888(struct iosys_map *dst, const unsigned in
> drm_fb_xrgb8888_to_xbgr8888_line);
> }
>
> -static void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +/**
> + * drm_fb_xrgb8888_to_rgb888_line - Convert one line from XRGB8888 to XRGB2101010
> + * @dbuf: Pointer to the destination line (in XRGB2101010)
> + * @sbuf: Pointer to the source line (in XRGB8888)
> + * @pixels: Number of pixels to convert.
> + */
> +void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> __le32 *dbuf32 = dbuf;
> const __le32 *sbuf32 = sbuf;
> @@ -726,6 +790,7 @@ static void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void *sbuf, un
> *dbuf32++ = cpu_to_le32(pix);
> }
> }
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb2101010_line);
>
> /**
> * drm_fb_xrgb8888_to_xrgb2101010 - Convert XRGB8888 to XRGB2101010 clip buffer
> @@ -761,7 +826,13 @@ void drm_fb_xrgb8888_to_xrgb2101010(struct iosys_map *dst, const unsigned int *d
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb2101010);
>
> -static void drm_fb_xrgb8888_to_argb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +/**
> + * drm_fb_xrgb8888_to_rgb888_line - Convert one line from XRGB8888 to ARGB2101010
> + * @dbuf: Pointer to the destination line (in ARGB2101010)
> + * @sbuf: Pointer to the source line (in XRGB8888)
> + * @pixels: Number of pixels to convert.
> + */
> +void drm_fb_xrgb8888_to_argb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> __le32 *dbuf32 = dbuf;
> const __le32 *sbuf32 = sbuf;
> @@ -779,6 +850,7 @@ static void drm_fb_xrgb8888_to_argb2101010_line(void *dbuf, const void *sbuf, un
> *dbuf32++ = cpu_to_le32(pix);
> }
> }
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_argb2101010_line);
>
> /**
> * drm_fb_xrgb8888_to_argb2101010 - Convert XRGB8888 to ARGB2101010 clip buffer
> diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
> index 291deb09475b..31ab699128d5 100644
> --- a/include/drm/drm_format_helper.h
> +++ b/include/drm/drm_format_helper.h
> @@ -24,30 +24,39 @@ void drm_fb_memcpy(struct iosys_map *dst, const unsigned int *dst_pitch,
> void drm_fb_swab(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip, bool cached);
> +void drm_fb_r1_to_32bit_line(void *dbuf, const void *sbuf, unsigned int pixels,
> + u32 fg_color, u32 bg_color);
> void drm_fb_xrgb8888_to_rgb332(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> +void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigned int pixels);
> void drm_fb_xrgb8888_to_rgb565(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip, bool swab);
> +void drm_fb_xrgb8888_to_xrgb1555_line(void *dbuf, const void *sbuf, unsigned int pixels);
> void drm_fb_xrgb8888_to_xrgb1555(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> +void drm_fb_xrgb8888_to_argb1555_line(void *dbuf, const void *sbuf, unsigned int pixels);
> void drm_fb_xrgb8888_to_argb1555(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> +void drm_fb_xrgb8888_to_rgba5551_line(void *dbuf, const void *sbuf, unsigned int pixels);
> void drm_fb_xrgb8888_to_rgba5551(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> +void drm_fb_xrgb8888_to_rgb888_line(void *dbuf, const void *sbuf, unsigned int pixels);
> void drm_fb_xrgb8888_to_rgb888(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> void drm_fb_xrgb8888_to_argb8888(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> +void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels);
> void drm_fb_xrgb8888_to_xrgb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> +void drm_fb_xrgb8888_to_argb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels);
> void drm_fb_xrgb8888_to_argb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
>
