drm/tinydrm/mipi-dbi: Add mipi_dbi_init_with_formats()

The MIPI DBI standard support more pixel formats than what this helper
supports. Add an init function that lets the driver use different
format(s). This avoids open coding mipi_dbi_init() in st7586.

st7586 sets preferred_depth but this is not necessary since it only
supports one format.

v2: Forgot to remove the mipi->rotation assignment in st7586,
    mipi_dbi_init_with_formats() handles it.

Cc: David Lechner <david@lechnology.com>
Acked-by: David Lechner <david@lechnology.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Tested-by: David Lechner <david@lechnology.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190719155916.62465-11-noralf@tronnes.org

1 files changed, 5 insertions, 0 deletions

diff --git a/include/drm/tinydrm/mipi-dbi.h b/include/drm/tinydrm/mipi-dbi.h
index 35a1413f2122..c4b04789bf84 100644
--- a/include/drm/tinydrm/mipi-dbi.h
+++ b/include/drm/tinydrm/mipi-dbi.h
@@ -69,6 +69,11 @@ static inline struct mipi_dbi *drm_to_mipi_dbi(struct drm_device *drm)
 
 int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *mipi,
 		      struct gpio_desc *dc);
+int mipi_dbi_init_with_formats(struct mipi_dbi *mipi,
+			       const struct drm_simple_display_pipe_funcs *funcs,
+			       const uint32_t *formats, unsigned int format_count,
+			       const struct drm_display_mode *mode,
+			       unsigned int rotation, size_t tx_buf_size);
 int mipi_dbi_init(struct mipi_dbi *mipi,
 		  const struct drm_simple_display_pipe_funcs *funcs,
 		  const struct drm_display_mode *mode, unsigned int rotation);