diff options
| author | David Lechner <david@lechnology.com> | 2017-11-19 14:12:07 -0600 |
|---|---|---|
| committer | Noralf Trønnes <noralf@tronnes.org> | 2017-12-01 14:07:16 +0100 |
| commit | 13deee8111ed600ecd1809b0bfbab232c82159d9 (patch) | |
| tree | ca34688806d808f06b104757dd4ed8640de85f93 | |
| parent | 3fd8d9e00f44b7057aa02a50b06e8320cc822526 (diff) | |
| download | op-kernel-dev-13deee8111ed600ecd1809b0bfbab232c82159d9.zip op-kernel-dev-13deee8111ed600ecd1809b0bfbab232c82159d9.tar.gz | |
drm/tinydrm: export mipi_dbi_buf_copy and mipi_dbi_spi_cmd_max_speed
This exports the mipi_dbi_buf_copy() and mipi_dbi_spi_cmd_max_speed()
functions so that they can be shared with other drivers.
Signed-off-by: David Lechner <david@lechnology.com>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1511122328-31133-4-git-send-email-david@lechnology.com
| -rw-r--r-- | drivers/gpu/drm/tinydrm/mipi-dbi.c | 24 | ||||
| -rw-r--r-- | include/drm/tinydrm/mipi-dbi.h | 4 |
2 files changed, 23 insertions, 5 deletions
diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c index 347f9b2..aa6b6ce 100644 --- a/drivers/gpu/drm/tinydrm/mipi-dbi.c +++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c @@ -154,8 +154,18 @@ int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len) } EXPORT_SYMBOL(mipi_dbi_command_buf); -static int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb, - struct drm_clip_rect *clip, bool swap) +/** + * mipi_dbi_buf_copy - Copy a framebuffer, transforming it if necessary + * @dst: The destination buffer + * @fb: The source framebuffer + * @clip: Clipping rectangle of the area to be copied + * @swap: When true, swap MSB/LSB of 16-bit values + * + * Returns: + * Zero on success, negative error code on failure. + */ +int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb, + struct drm_clip_rect *clip, bool swap) { struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0); struct dma_buf_attachment *import_attach = cma_obj->base.import_attach; @@ -192,6 +202,7 @@ static int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb, DMA_FROM_DEVICE); return ret; } +EXPORT_SYMBOL(mipi_dbi_buf_copy); static int mipi_dbi_fb_dirty(struct drm_framebuffer *fb, struct drm_file *file_priv, @@ -444,18 +455,23 @@ EXPORT_SYMBOL(mipi_dbi_display_is_on); #if IS_ENABLED(CONFIG_SPI) -/* +/** + * mipi_dbi_spi_cmd_max_speed - get the maximum SPI bus speed + * @spi: SPI device + * @len: The transfer buffer length. + * * Many controllers have a max speed of 10MHz, but can be pushed way beyond * that. Increase reliability by running pixel data at max speed and the rest * at 10MHz, preventing transfer glitches from messing up the init settings. */ -static u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len) +u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len) { if (len > 64) return 0; /* use default */ return min_t(u32, 10000000, spi->max_speed_hz); } +EXPORT_SYMBOL(mipi_dbi_spi_cmd_max_speed); /* * MIPI DBI Type C Option 1 diff --git a/include/drm/tinydrm/mipi-dbi.h b/include/drm/tinydrm/mipi-dbi.h index 83346dd..5d0e82b 100644 --- a/include/drm/tinydrm/mipi-dbi.h +++ b/include/drm/tinydrm/mipi-dbi.h @@ -72,10 +72,12 @@ void mipi_dbi_pipe_enable(struct drm_simple_display_pipe *pipe, void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe); void mipi_dbi_hw_reset(struct mipi_dbi *mipi); bool mipi_dbi_display_is_on(struct mipi_dbi *mipi); +u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len); int mipi_dbi_command_read(struct mipi_dbi *mipi, u8 cmd, u8 *val); int mipi_dbi_command_buf(struct mipi_dbi *mipi, u8 cmd, u8 *data, size_t len); - +int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb, + struct drm_clip_rect *clip, bool swap); /** * mipi_dbi_command - MIPI DCS command with optional parameter(s) * @mipi: MIPI structure |
