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authorDavid Lechner <david@lechnology.com>2017-11-19 21:12:07 +0100
committerNoralf Trønnes <noralf@tronnes.org>2017-12-01 14:07:16 +0100
commit13deee8111ed600ecd1809b0bfbab232c82159d9 (patch)
treeca34688806d808f06b104757dd4ed8640de85f93 /drivers/gpu/drm/tinydrm
parentdt-bindings: Add binding for Ilitek ILI9225 display panels (diff)
downloadlinux-13deee8111ed600ecd1809b0bfbab232c82159d9.tar.xz
linux-13deee8111ed600ecd1809b0bfbab232c82159d9.zip
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
Diffstat (limited to 'drivers/gpu/drm/tinydrm')
-rw-r--r--drivers/gpu/drm/tinydrm/mipi-dbi.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
index 347f9b226f26..aa6b6ce56891 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