drm/dsi: Implement generic read and write commands

Implement generic read and write commands. Selection of the proper data
type for packets is done automatically based on the number of parameters
or payload length.

Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 4a4e9d7ccc16..524655509cf1 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -155,6 +155,12 @@ int mipi_dsi_attach(struct mipi_dsi_device *dsi);
 int mipi_dsi_detach(struct mipi_dsi_device *dsi);
 int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
                                             u16 value);
+
+ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
+                               size_t size);
+ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
+                              size_t num_params, void *data, size_t size);
+
 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
                                   const void *data, size_t len);
 ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,