[RFC PATCH 02/10] drm/mipi-dsi: document DSI hosts limitations

Dmitry Baryshkov
2023-10-16T17:26:07Z

Document the known limititations of the DSI hosts vs commands transfers
in LP mode. For the details see sun6i_dsi_encoder_enable().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
include/drm/drm_mipi_dsi.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index c9df0407980c..167742e579e3 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -85,6 +85,10 @@ int mipi_dsi_create_packet(struct mipi_dsi_packet *packet,
* host is in. Drivers that need the underlying device to be powered to
* perform these operations will first need to make sure it's been
* properly enabled.
+ *
+ * Note: some hosts (sunxi) can not send LP commands between HS video
+ * packets. Thus all DSI transfers sent in LP mode should be limited to the
+ * drm_bridge_funcs::pre_enable() and drm_panel_funcs::prepare() callbacks.
*/
struct mipi_dsi_host_ops {
int (*attach)(struct mipi_dsi_host *host,
--
2.42.0