From: vkorjani vikas.korjani@intel.com

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

Signed-off-by: vkorjani vikas.korjani@intel.com --- drivers/gpu/drm/drm_mipi_dsi.c | 29 +++++++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 4 +++- include/video/mipi_display.h | 3 +++ 3 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 2d5ca8ee..cd536d1 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -521,6 +521,35 @@ ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, EXPORT_SYMBOL(mipi_dsi_dcs_write_buffer);

/** + * mipi_dsi_dsc_pps_write_buffer() - transmit a DSC command with payload + * @dsi: DSI peripheral device + * @data: buffer containing data to be transmitted + * @len: size of transmission buffer + * + * function will automatically choose the right data type depending on + * the command payload length. + * + * Return: The number of bytes successfully transmitted or a negative error + * code on failure.*/ +ssize_t mipi_dsi_dsc_pps_write_buffer(struct mipi_dsi_device *dsi, + const void *data, size_t len) +{ + struct mipi_dsi_msg msg = { + .channel = dsi->channel, + .tx_buf = data, + .tx_len = len + }; + + if (len == 0) + msg.type = MIPI_DSI_DCS_COMPRESSION_MODE; + else + msg.type = MIPI_DSI_PPS_LONG_WRITE; + + return mipi_dsi_device_transfer(dsi, &msg); +} +EXPORT_SYMBOL(mipi_dsi_dsc_pps_write_buffer); + +/** * mipi_dsi_dcs_write() - send DCS write command * @dsi: DSI peripheral device * @cmd: DCS command diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index f1d8d0d..2aa5120 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -197,7 +197,9 @@ ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, const void *data, size_t len); ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, - size_t len); + size_t len); +ssize_t mipi_dsi_dsc_pps_write_buffer(struct mipi_dsi_device *dsi, + const void *data, size_t len); int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi); int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode); diff --git a/include/video/mipi_display.h b/include/video/mipi_display.h index ddcc8ca..880e6e6 100644 --- a/include/video/mipi_display.h +++ b/include/video/mipi_display.h @@ -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,