Commit ea107a18 authored Apr 10, 2018 by vkorjani Committed by Rob Clark Jul 25, 2018

drm: Add support for pps and compression mode command packet

After enabling DSC we need to send compression mode command packet
and pps data packet, for which 2 new data types are added
07h  Compression Mode Data Type Write , short write, 2 parameters
0Ah  PPS Long Write (word count determines number of bytes)
This patch adds support to send these packets.

Cc: David Airlie <airlied@linux.ie>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-fbdev@vger.kernel.org

Changes in v3:
- None

Signed-off-by: vkorjani <vikas.korjani@intel.com>
[seanpaul removed pps_write_buffer fn, added types to packet_format helpers]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

parent 23f94551

drivers/gpu/drm/drm_mipi_dsi.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -392,6 +392,7 @@ bool mipi_dsi_packet_format_is_short(u8 type)
		case MIPI_DSI_DCS_SHORT_WRITE:
		case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
		case MIPI_DSI_DCS_READ:
		case MIPI_DSI_DCS_COMPRESSION_MODE:
		case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
		return true;
		}
		@@ -410,6 +411,7 @@ EXPORT_SYMBOL(mipi_dsi_packet_format_is_short);
		bool mipi_dsi_packet_format_is_long(u8 type)
		{
		switch (type) {
		case MIPI_DSI_PPS_LONG_WRITE:
		case MIPI_DSI_NULL_PACKET:
		case MIPI_DSI_BLANKING_PACKET:
		case MIPI_DSI_GENERIC_LONG_WRITE:

include/video/mipi_display.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -38,6 +38,9 @@ enum {

		MIPI_DSI_DCS_READ = 0x06,

		MIPI_DSI_DCS_COMPRESSION_MODE = 0x07,
		MIPI_DSI_PPS_LONG_WRITE = 0x0A,

		MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE = 0x37,

		MIPI_DSI_END_OF_TRANSMISSION = 0x08,