This is needed for drm_panic, to draw the font, and fill
the background color, in multiple color format.
v5:
* Change the drawing API, use drm_fb_blit_from_r1() to draw the font.
* Also add drm_fb_fill() to fill area with background color.
v6:
* fix __le32 conversion warning found by the kernel test bot
Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
---
drivers/gpu/drm/drm_format_helper.c | 432 ++++++++++++++++++++++------
include/drm/drm_format_helper.h | 9 +
2 files changed, 360 insertions(+), 81 deletions(-)
diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
index b1be458ed4dd..2d9646cefc4f 100644
--- a/drivers/gpu/drm/drm_format_helper.c
+++ b/drivers/gpu/drm/drm_format_helper.c
@@ -111,6 +111,153 @@ void drm_format_conv_state_release(struct drm_format_conv_state *state)
}
EXPORT_SYMBOL(drm_format_conv_state_release);
+static __le16 drm_format_xrgb8888_to_rgb565(__le32 val32)
+{
+ u16 val16;
+ u32 pix;
+
+ pix = le32_to_cpu(val32);
+ val16 = ((pix & 0x00F80000) >> 8) |
+ ((pix & 0x0000FC00) >> 5) |
+ ((pix & 0x000000F8) >> 3);
+ return cpu_to_le16(val16);
+}
+
+static __le16 drm_format_xrgb8888_to_rgba5551(__le32 val32)
+{
+ u16 val16;
+ u32 pix;
+
+ pix = le32_to_cpu(val32);
+ val16 = ((pix & 0x00f80000) >> 8) |
+ ((pix & 0x0000f800) >> 5) |
+ ((pix & 0x000000f8) >> 2) |
+ BIT(0); /* set alpha bit */
+ return cpu_to_le16(val16);
+}
+
+static __le16 drm_format_xrgb8888_to_xrgb1555(__le32 val32)
+{
+ u16 val16;
+ u32 pix;
+
+ pix = le32_to_cpu(val32);
+ val16 = ((pix & 0x00f80000) >> 9) |
+ ((pix & 0x0000f800) >> 6) |
+ ((pix & 0x000000f8) >> 3);
+ return cpu_to_le16(val16);
+}
+
+static __le16 drm_format_xrgb8888_to_argb1555(__le32 val32)
+{
+ u16 val16;
+ u32 pix;
+
+ pix = le32_to_cpu(val32);
+ val16 = BIT(15) | /* set alpha bit */
+ ((pix & 0x00f80000) >> 9) |
+ ((pix & 0x0000f800) >> 6) |
+ ((pix & 0x000000f8) >> 3);
+ return cpu_to_le16(val16);
+}
+
+static __le32 drm_format_xrgb8888_to_argb8888(__le32 pix)
+{
+ u32 val32;
+
+ val32 = le32_to_cpu(pix);
+ val32 |= GENMASK(31, 24); /* fill alpha bits */
+ return cpu_to_le32(val32);
+}
+
+static __le32 drm_format_xrgb8888_to_xbgr8888(__le32 pix)
+{
+ u32 val32;
+
+ val32 = le32_to_cpu(pix);
+ val32 = ((val32 & 0x00ff0000) >> 16) << 0 |
+ ((val32 & 0x0000ff00) >> 8) << 8 |
+ ((val32 & 0x000000ff) >> 0) << 16 |
+ ((val32 & 0xff000000) >> 24) << 24;
+ return cpu_to_le32(val32);
+}
+
+static __le32 drm_format_xrgb8888_to_abgr8888(__le32 pix)
+{
+ u32 val32;
+
+ val32 = le32_to_cpu(pix);
+ val32 = ((val32 & 0x00ff0000) >> 16) << 0 |
+ ((val32 & 0x0000ff00) >> 8) << 8 |
+ ((val32 & 0x000000ff) >> 0) << 16 |
+ GENMASK(31, 24); /* fill alpha bits */
+ return cpu_to_le32(val32);
+}
+
+static __le32 drm_format_xrgb8888_to_xrgb2101010(__le32 pix)
+{
+ u32 val32;
+
+ val32 = le32_to_cpu(pix);
+ val32 = ((val32 & 0x000000FF) << 2) |
+ ((val32 & 0x0000FF00) << 4) |
+ ((val32 & 0x00FF0000) << 6);
+ return cpu_to_le32(val32 | ((val32 >> 8) & 0x00300C03));
+}
+
+static __le32 drm_format_xrgb8888_to_argb2101010(__le32 pix)
+{
+ u32 val32;
+
+ val32 = le32_to_cpu(pix);
+ val32 = ((val32 & 0x000000FF) << 2) |
+ ((val32 & 0x0000FF00) << 4) |
+ ((val32 & 0x00FF0000) << 6);
+ val32 = GENMASK(31, 30) | /* set alpha bits */
+ val32 | ((val32 >> 8) & 0x00300c03);
+ return cpu_to_le32(val32);
+}
+
+/**
+ * drm_fb_convert_from_xrgb8888 - convert one pixel from xrgb8888 to the desired format
+ * @color: input color, in xrgb8888 format
+ * @format: output format
+ *
+ * Returns:
+ * Color in the format specified, casted to u32.
+ * Or 0 if the format is unknown.
+ */
+u32 drm_fb_convert_from_xrgb8888(u32 color, u32 format)
+{
+ __le32 pix = cpu_to_le32(color);
+
+ switch (format) {
+ case DRM_FORMAT_RGB565:
+ return le16_to_cpu(drm_format_xrgb8888_to_rgb565(pix));
+ case DRM_FORMAT_RGBA5551:
+ return le16_to_cpu(drm_format_xrgb8888_to_rgba5551(pix));
+ case DRM_FORMAT_XRGB1555:
+ return le16_to_cpu(drm_format_xrgb8888_to_xrgb1555(pix));
+ case DRM_FORMAT_ARGB1555:
+ return le16_to_cpu(drm_format_xrgb8888_to_argb1555(pix));
+ case DRM_FORMAT_RGB888:
+ case DRM_FORMAT_XRGB8888:
+ return le32_to_cpu(pix);
+ case DRM_FORMAT_ARGB8888:
+ return le32_to_cpu(drm_format_xrgb8888_to_argb8888(pix));
+ case DRM_FORMAT_XBGR8888:
+ return le32_to_cpu(drm_format_xrgb8888_to_xbgr8888(pix));
+ case DRM_FORMAT_XRGB2101010:
+ return le32_to_cpu(drm_format_xrgb8888_to_xrgb2101010(pix));
+ case DRM_FORMAT_ARGB2101010:
+ return le32_to_cpu(drm_format_xrgb8888_to_argb2101010(pix));
+ default:
+ WARN_ONCE(1, "Can't convert to %p4cc\n", &format);
+ return 0;
+ }
+}
+EXPORT_SYMBOL(drm_fb_convert_from_xrgb8888);
+
static unsigned int clip_offset(const struct drm_rect *clip, unsigned int pitch, unsigned int cpp)
{
return clip->y1 * pitch + clip->x1 * cpp;
@@ -366,6 +513,193 @@ void drm_fb_swab(struct iosys_map *dst, const unsigned int *dst_pitch,
}
EXPORT_SYMBOL(drm_fb_swab);
+static void drm_fb_r1_to_16bit(struct iosys_map *dmap, unsigned int dpitch,
+ const u8 *sbuf8, unsigned int spitch,
+ unsigned int height, unsigned int width,
+ __le16 fg16, __le16 bg16)
+{
+ unsigned int l, x;
+ __le16 val16;
+
+ for (l = 0; l < height; l++) {
+ for (x = 0; x < width; x++) {
+ val16 = (sbuf8[(l * spitch) + x / 8] & (0x80 >> (x % 8))) ? fg16 : bg16;
+ iosys_map_wr(dmap, l * dpitch + x * sizeof(u16), u16, le16_to_cpu(val16));
+ }
+ }
+}
+
+static void drm_fb_r1_to_24bit(struct iosys_map *dmap, unsigned int dpitch,
+ const u8 *sbuf8, unsigned int spitch,
+ unsigned int height, unsigned int width,
+ __le32 fg32, __le32 bg32)
+{
+ unsigned int l, x;
+ __le32 color;
+ u32 val32;
+
+ for (l = 0; l < height; l++) {
+ for (x = 0; x < width; x++) {
+ u32 off = l * dpitch + x * 3;
+
+ color = (sbuf8[(l * spitch) + x / 8] & (0x80 >> (x % 8))) ? fg32 : bg32;
+ val32 = le32_to_cpu(color);
+
+ /* write blue-green-red to output in little endianness */
+ iosys_map_wr(dmap, off, u8, (val32 & 0x000000FF) >> 0);
+ iosys_map_wr(dmap, off + 1, u8, (val32 & 0x0000FF00) >> 8);
+ iosys_map_wr(dmap, off + 2, u8, (val32 & 0x00FF0000) >> 16);
+ }
+ }
+}
+
+static void drm_fb_r1_to_32bit(struct iosys_map *dmap, unsigned int dpitch,
+ const u8 *sbuf8, unsigned int spitch,
+ unsigned int height, unsigned int width,
+ __le32 fg32, __le32 bg32)
+{
+ unsigned int l, x;
+ __le32 val32;
+
+ for (l = 0; l < height; l++) {
+ for (x = 0; x < width; x++) {
+ val32 = (sbuf8[(l * spitch) + x / 8] & (0x80 >> (x % 8))) ? fg32 : bg32;
+ iosys_map_wr(dmap, l * dpitch + x * sizeof(u32), u32, le32_to_cpu(val32));
+ }
+ }
+}
+
+/**
+ * drm_fb_blit_from_r1 - convert a monochrome image to a linear framebuffer
+ * @dmap: destination iosys_map
+ * @dpitch: destination pitch in bytes
+ * @sbuf8: source buffer, in monochrome format, 8 pixels per byte.
+ * @spitch: source pitch in bytes
+ * @height: height of the image to copy, in pixels
+ * @width: width of the image to copy, in pixels
+ * @fg_color: foreground color, in destination format
+ * @bg_color: background color, in destination format
+ * @pixel_width: pixel width in bytes.
+ *
+ * This can be used to draw font which are monochrome images, to a framebuffer
+ * in other supported format.
+ */
+void drm_fb_blit_from_r1(struct iosys_map *dmap, unsigned int dpitch,
+ const u8 *sbuf8, unsigned int spitch,
+ unsigned int height, unsigned int width,
+ u32 fg_color, u32 bg_color,
+ unsigned int pixel_width)
+{
+ switch (pixel_width) {
+ case 2:
+ drm_fb_r1_to_16bit(dmap, dpitch, sbuf8, spitch,
+ height, width,
+ cpu_to_le16(fg_color),
+ cpu_to_le16(bg_color));
+ break;
+ case 3:
+ drm_fb_r1_to_24bit(dmap, dpitch, sbuf8, spitch,
+ height, width,
+ cpu_to_le32(fg_color),
+ cpu_to_le32(bg_color));
+ break;
+ case 4:
+ drm_fb_r1_to_32bit(dmap, dpitch, sbuf8, spitch,
+ height, width,
+ cpu_to_le32(fg_color),
+ cpu_to_le32(bg_color));
+ break;
+ default:
+ WARN_ONCE(1, "Can't blit with pixel width %d\n", pixel_width);
+ }
+}
+EXPORT_SYMBOL(drm_fb_blit_from_r1);
+
+static void drm_fb_fill8(struct iosys_map *dmap, unsigned int dpitch,
+ unsigned int height, unsigned int width,
+ u8 color)
+{
+ unsigned int l, x;
+
+ for (l = 0; l < height; l++)
+ for (x = 0; x < width; x++)
+ iosys_map_wr(dmap, l * dpitch + x * sizeof(u8), u8, color);
+}
+
+static void drm_fb_fill16(struct iosys_map *dmap, unsigned int dpitch,
+ unsigned int height, unsigned int width,
+ u16 color)
+{
+ unsigned int l, x;
+
+ for (l = 0; l < height; l++)
+ for (x = 0; x < width; x++)
+ iosys_map_wr(dmap, l * dpitch + x * sizeof(u16), u16, color);
+}
+
+static void drm_fb_fill24(struct iosys_map *dmap, unsigned int dpitch,
+ unsigned int height, unsigned int width,
+ u32 color)
+{
+ unsigned int l, x;
+
+ for (l = 0; l < height; l++) {
+ for (x = 0; x < width; x++) {
+ unsigned int off = l * dpitch + x * 3;
+
+ /* write blue-green-red to output in little endianness */
+ iosys_map_wr(dmap, off, u8, (color & 0x000000FF) >> 0);
+ iosys_map_wr(dmap, off + 1, u8, (color & 0x0000FF00) >> 8);
+ iosys_map_wr(dmap, off + 2, u8, (color & 0x00FF0000) >> 16);
+ }
+ }
+}
+
+static void drm_fb_fill32(struct iosys_map *dmap, unsigned int dpitch,
+ unsigned int height, unsigned int width,
+ u32 color)
+{
+ unsigned int l, x;
+
+ for (l = 0; l < height; l++)
+ for (x = 0; x < width; x++)
+ iosys_map_wr(dmap, l * dpitch + x * sizeof(u32), u32, color);
+}
+
+/**
+ * drm_fb_fill - Fill a rectangle with a color
+ * @dmap: destination iosys_map, pointing to the top left corner of the rectangle
+ * @dpitch: destination pitch in bytes
+ * @height: height of the rectangle, in pixels
+ * @width: width of the rectangle, in pixels
+ * @color: color to fill the rectangle.
+ * @pixel_width: pixel width in bytes
+ *
+ * Fill a rectangle with a color, in a linear framebuffer.
+ */
+void drm_fb_fill(struct iosys_map *dmap, unsigned int dpitch,
+ unsigned int height, unsigned int width,
+ u32 color, unsigned int pixel_width)
+{
+ switch (pixel_width) {
+ case 1:
+ drm_fb_fill8(dmap, dpitch, height, width, color);
+ break;
+ case 2:
+ drm_fb_fill16(dmap, dpitch, height, width, color);
+ break;
+ case 3:
+ drm_fb_fill24(dmap, dpitch, height, width, color);
+ break;
+ case 4:
+ drm_fb_fill32(dmap, dpitch, height, width, color);
+ break;
+ default:
+ WARN_ONCE(1, "Can't fill with pixel width %d\n", pixel_width);
+ }
+}
+EXPORT_SYMBOL(drm_fb_fill);
+
static void drm_fb_xrgb8888_to_rgb332_line(void *dbuf, const void *sbuf, unsigned int pixels)
{
u8 *dbuf8 = dbuf;
@@ -420,15 +754,9 @@ static void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigne
__le16 *dbuf16 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u16 val16;
- u32 pix;
for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- val16 = ((pix & 0x00F80000) >> 8) |
- ((pix & 0x0000FC00) >> 5) |
- ((pix & 0x000000F8) >> 3);
- dbuf16[x] = cpu_to_le16(val16);
+ dbuf16[x] = drm_format_xrgb8888_to_rgb565(sbuf32[x]);
}
}
@@ -498,16 +826,9 @@ static void drm_fb_xrgb8888_to_xrgb1555_line(void *dbuf, const void *sbuf, unsig
__le16 *dbuf16 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u16 val16;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- val16 = ((pix & 0x00f80000) >> 9) |
- ((pix & 0x0000f800) >> 6) |
- ((pix & 0x000000f8) >> 3);
- dbuf16[x] = cpu_to_le16(val16);
- }
+ for (x = 0; x < pixels; x++)
+ dbuf16[x] = drm_format_xrgb8888_to_xrgb1555(sbuf32[x]);
}
/**
@@ -550,17 +871,9 @@ static void drm_fb_xrgb8888_to_argb1555_line(void *dbuf, const void *sbuf, unsig
__le16 *dbuf16 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u16 val16;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- val16 = BIT(15) | /* set alpha bit */
- ((pix & 0x00f80000) >> 9) |
- ((pix & 0x0000f800) >> 6) |
- ((pix & 0x000000f8) >> 3);
- dbuf16[x] = cpu_to_le16(val16);
- }
+ for (x = 0; x < pixels; x++)
+ dbuf16[x] = drm_format_xrgb8888_to_argb1555(sbuf32[x]);
}
/**
@@ -603,17 +916,9 @@ static void drm_fb_xrgb8888_to_rgba5551_line(void *dbuf, const void *sbuf, unsig
__le16 *dbuf16 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u16 val16;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- val16 = ((pix & 0x00f80000) >> 8) |
- ((pix & 0x0000f800) >> 5) |
- ((pix & 0x000000f8) >> 2) |
- BIT(0); /* set alpha bit */
- dbuf16[x] = cpu_to_le16(val16);
- }
+ for (x = 0; x < pixels; x++)
+ dbuf16[x] = drm_format_xrgb8888_to_rgba5551(sbuf32[x]);
}
/**
@@ -707,13 +1012,9 @@ static void drm_fb_xrgb8888_to_argb8888_line(void *dbuf, const void *sbuf, unsig
__le32 *dbuf32 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- pix |= GENMASK(31, 24); /* fill alpha bits */
- dbuf32[x] = cpu_to_le32(pix);
- }
+ for (x = 0; x < pixels; x++)
+ dbuf32[x] = drm_format_xrgb8888_to_argb8888(sbuf32[x]);
}
/**
@@ -756,16 +1057,9 @@ static void drm_fb_xrgb8888_to_abgr8888_line(void *dbuf, const void *sbuf, unsig
__le32 *dbuf32 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- pix = ((pix & 0x00ff0000) >> 16) << 0 |
- ((pix & 0x0000ff00) >> 8) << 8 |
- ((pix & 0x000000ff) >> 0) << 16 |
- GENMASK(31, 24); /* fill alpha bits */
- *dbuf32++ = cpu_to_le32(pix);
- }
+ for (x = 0; x < pixels; x++)
+ *dbuf32++ = drm_format_xrgb8888_to_abgr8888(sbuf32[x]);
}
static void drm_fb_xrgb8888_to_abgr8888(struct iosys_map *dst, const unsigned int *dst_pitch,
@@ -787,16 +1081,9 @@ static void drm_fb_xrgb8888_to_xbgr8888_line(void *dbuf, const void *sbuf, unsig
__le32 *dbuf32 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- pix = ((pix & 0x00ff0000) >> 16) << 0 |
- ((pix & 0x0000ff00) >> 8) << 8 |
- ((pix & 0x000000ff) >> 0) << 16 |
- ((pix & 0xff000000) >> 24) << 24;
- *dbuf32++ = cpu_to_le32(pix);
- }
+ for (x = 0; x < pixels; x++)
+ *dbuf32++ = drm_format_xrgb8888_to_xbgr8888(sbuf32[x]);
}
static void drm_fb_xrgb8888_to_xbgr8888(struct iosys_map *dst, const unsigned int *dst_pitch,
@@ -818,17 +1105,9 @@ static void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void *sbuf, un
__le32 *dbuf32 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u32 val32;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- val32 = ((pix & 0x000000FF) << 2) |
- ((pix & 0x0000FF00) << 4) |
- ((pix & 0x00FF0000) << 6);
- pix = val32 | ((val32 >> 8) & 0x00300C03);
- *dbuf32++ = cpu_to_le32(pix);
- }
+ for (x = 0; x < pixels; x++)
+ *dbuf32++ = drm_format_xrgb8888_to_xrgb2101010(sbuf32[x]);
}
/**
@@ -872,18 +1151,9 @@ static void drm_fb_xrgb8888_to_argb2101010_line(void *dbuf, const void *sbuf, un
__le32 *dbuf32 = dbuf;
const __le32 *sbuf32 = sbuf;
unsigned int x;
- u32 val32;
- u32 pix;
- for (x = 0; x < pixels; x++) {
- pix = le32_to_cpu(sbuf32[x]);
- val32 = ((pix & 0x000000ff) << 2) |
- ((pix & 0x0000ff00) << 4) |
- ((pix & 0x00ff0000) << 6);
- pix = GENMASK(31, 30) | /* set alpha bits */
- val32 | ((val32 >> 8) & 0x00300c03);
- *dbuf32++ = cpu_to_le32(pix);
- }
+ for (x = 0; x < pixels; x++)
+ *dbuf32++ = drm_format_xrgb8888_to_argb2101010(sbuf32[x]);
}
/**
diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
index f13b34e0b752..f416f0bef52d 100644
--- a/include/drm/drm_format_helper.h
+++ b/include/drm/drm_format_helper.h
@@ -66,6 +66,7 @@ void *drm_format_conv_state_reserve(struct drm_format_conv_state *state,
size_t new_size, gfp_t flags);
void drm_format_conv_state_release(struct drm_format_conv_state *state);
+u32 drm_fb_convert_from_xrgb8888(u32 color, u32 format);
unsigned int drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info *format,
const struct drm_rect *clip);
@@ -76,6 +77,14 @@ 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,
struct drm_format_conv_state *state);
+void drm_fb_blit_from_r1(struct iosys_map *dmap, unsigned int dpitch,
+ const u8 *sbuf8, unsigned int spitch,
+ unsigned int height, unsigned int width,
+ u32 fg_color, u32 bg_color,
+ unsigned int pixel_width);
+void drm_fb_fill(struct iosys_map *dmap, unsigned int dpitch,
+ unsigned int height, unsigned int width,
+ u32 color, unsigned int pixel_width);
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, struct drm_format_conv_state *state);
--
2.43.0
