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Code Issues Releases Wiki Activity

drm/mipi-dbi: Make mipi_dbi_command_stackbuf() data parameter const

Browse source 
mipi_dbi_command_stackbuf() copies the passed buffer data, so it can be
const.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200316164249.6234-1-geert+renesas@glider.be
This commit is contained in:
Geert Uytterhoeven 2020-03-16 17:42:49 +01:00 committed by Sam Ravnborg
parent 92e513fb07
commit f019190b7d
2 changed files with 5 additions and 3 deletions
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3
drivers/gpu/drm/drm_mipi_dbi.c
View file

@ -169,7 +169,8 @@ int mipi_dbi_command_buf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len)
EXPORT_SYMBOL(mipi_dbi_command_buf);
/* This should only be used by mipi_dbi_command() */
int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len)
int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, const u8 *data,
size_t len)
{
u8 *buf;
int ret;

5
include/drm/drm_mipi_dbi.h
View file

@ -170,7 +170,8 @@ int mipi_dbi_spi_transfer(struct spi_device *spi, u32 speed_hz,
int mipi_dbi_command_read(struct mipi_dbi *dbi, u8 cmd, u8 *val);
int mipi_dbi_command_buf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len);
int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len);
int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, const u8 *data,
size_t len);
int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
struct drm_rect *clip, bool swap);
/**
@ -187,7 +188,7 @@ int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
*/
#define mipi_dbi_command(dbi, cmd, seq...) \
({ \
u8 d[] = { seq }; \
const u8 d[] = { seq }; \
mipi_dbi_command_stackbuf(dbi, cmd, d, ARRAY_SIZE(d)); \
})