The LG SW43408 panel requires sending non-standard data as a part of the MIPI_DSI_COMPRESSION_MODE packet. Rather than hacking existing mipi_dsi_compression_mode() add mipi_dsi_compression_mode_raw(), which accepts raw data buffer and length. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> --- drivers/gpu/drm/drm_mipi_dsi.c | 34 ++++++++++++++++++++++++++-------- include/drm/drm_mipi_dsi.h | 1 + 2 files changed, 27 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index ef6e416522f8..f340d1e0a9a5 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -645,29 +645,47 @@ int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size); /** - * mipi_dsi_compression_mode() - enable/disable DSC on the peripheral + * mipi_dsi_compression_mode_raw() - control DSC on the peripheral * @dsi: DSI peripheral device - * @enable: Whether to enable or disable the DSC + * @data: data to be sent to the device + * @len: size of the data buffer * - * Enable or disable Display Stream Compression on the peripheral using the + * Control the Display Stream Compression on the peripheral using the * default Picture Parameter Set and VESA DSC 1.1 algorithm. * * Return: 0 on success or a negative error code on failure. */ -ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable) +ssize_t mipi_dsi_compression_mode_raw(struct mipi_dsi_device *dsi, void *data, size_t len) { - /* Note: Needs updating for non-default PPS or algorithm */ - u8 tx[2] = { enable << 0, 0 }; struct mipi_dsi_msg msg = { .channel = dsi->channel, .type = MIPI_DSI_COMPRESSION_MODE, - .tx_len = sizeof(tx), - .tx_buf = tx, + .tx_len = len, + .tx_buf = data, }; int ret = mipi_dsi_device_transfer(dsi, &msg); return (ret < 0) ? ret : 0; } +EXPORT_SYMBOL(mipi_dsi_compression_mode_raw); + +/** + * mipi_dsi_compression_mode() - enable/disable DSC on the peripheral + * @dsi: DSI peripheral device + * @enable: Whether to enable or disable the DSC + * + * Enable or disable Display Stream Compression on the peripheral using the + * default Picture Parameter Set and VESA DSC 1.1 algorithm. + * + * Return: 0 on success or a negative error code on failure. + */ +ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable) +{ + /* Note: Needs updating for non-default PPS or algorithm */ + u8 tx[2] = { enable << 0, 0 }; + + return mipi_dsi_compression_mode_raw(dsi, tx, sizeof(tx)); +} EXPORT_SYMBOL(mipi_dsi_compression_mode); /** diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index c0aec0d4d664..321d2b019687 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -242,6 +242,7 @@ int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi); int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, u16 value); ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable); +ssize_t mipi_dsi_compression_mode_raw(struct mipi_dsi_device *dsi, void *data, size_t len); ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi, const struct drm_dsc_picture_parameter_set *pps); -- 2.39.2