diff options
| author | Takashi Iwai <tiwai@suse.de> | 2022-09-08 12:51:10 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-09-10 22:45:52 +0300 |
| commit | aeb76f97fcf5bf6c094c62ac5cc22a1949751236 (patch) | |
| tree | b19ddb654d1fcbcde37e81ca11130ca44a9a7d1a /drivers/gpu/drm/udl/udl_transfer.c | |
| parent | 2a07a5ddb135e4bd15bf6468b7d2daa4deeaf07d (diff) | |
| download | linux-aeb76f97fcf5bf6c094c62ac5cc22a1949751236.tar.xz | |
drm/udl: Drop unneeded alignment
The alignment of damaged area was needed for the original udlfb driver
that tried to trim the superfluous copies between front and backend
buffers and handle data in long int. It's not the case for udl DRM
driver, hence we can omit the whole unneeded alignment, as well as the
dead code.
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220908095115.23396-8-tiwai@suse.de
Diffstat (limited to 'drivers/gpu/drm/udl/udl_transfer.c')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_transfer.c | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c index 176ef2a6a731..a431208dda85 100644 --- a/drivers/gpu/drm/udl/udl_transfer.c +++ b/drivers/gpu/drm/udl/udl_transfer.c @@ -25,46 +25,6 @@ #define MIN_RAW_PIX_BYTES 2 #define MIN_RAW_CMD_BYTES (RAW_HEADER_BYTES + MIN_RAW_PIX_BYTES) -/* - * Trims identical data from front and back of line - * Sets new front buffer address and width - * And returns byte count of identical pixels - * Assumes CPU natural alignment (unsigned long) - * for back and front buffer ptrs and width - */ -#if 0 -static int udl_trim_hline(const u8 *bback, const u8 **bfront, int *width_bytes) -{ - int j, k; - const unsigned long *back = (const unsigned long *) bback; - const unsigned long *front = (const unsigned long *) *bfront; - const int width = *width_bytes / sizeof(unsigned long); - int identical = width; - int start = width; - int end = width; - - for (j = 0; j < width; j++) { - if (back[j] != front[j]) { - start = j; - break; - } - } - - for (k = width - 1; k > j; k--) { - if (back[k] != front[k]) { - end = k+1; - break; - } - } - - identical = start + (width - end); - *bfront = (u8 *) &front[start]; - *width_bytes = (end - start) * sizeof(unsigned long); - - return identical * sizeof(unsigned long); -} -#endif - static inline u16 pixel32_to_be16(const uint32_t pixel) { return (((pixel >> 3) & 0x001f) | |