The MIPI DSI v1.3 spec defines two modes for transporting compressed
pixel data: one slice per packet or multiple slice widths in a single
packet (Section 8.8.24 Figure 40).

Add a MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT flag that panel drivers can
set to indicate that all DSC slices for a line should be packed into a
single packet. When unset should default to 1 slice per packet.

Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
---
 include/drm/drm_mipi_dsi.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 3aba7b380c8d..d3ad8c5d3ebe 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -138,6 +138,8 @@ struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node);
 #define MIPI_DSI_MODE_LPM		BIT(11)
 /* transmit data ending at the same time for all lanes within one hsync */
 #define MIPI_DSI_HS_PKT_END_ALIGNED	BIT(12)
+/* pack all DSC slices for a line into a single packet */
+#define MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT	BIT(13)
 
 enum mipi_dsi_pixel_format {
 	MIPI_DSI_FMT_RGB888,

-- 
2.53.0

On Wed, Mar 18, 2026 at 07:32:58AM +0000, Alexander Koskovich wrote:
> The MIPI DSI v1.3 spec defines two modes for transporting compressed
> pixel data: one slice per packet or multiple slice widths in a single
> packet (Section 8.8.24 Figure 40).
> 
> Add a MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT flag that panel drivers can
> set to indicate that all DSC slices for a line should be packed into a
> single packet. When unset should default to 1 slice per packet.
> 
> Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
> ---
>  include/drm/drm_mipi_dsi.h | 2 ++
>  1 file changed, 2 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

However I'd also like to hear an optinion from somebody else with the
higher authority.

-- 
With best wishes
Dmitry