diff options
Diffstat (limited to 'drivers/gpu/drm/drm_mipi_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/drm_mipi_dsi.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 3f33f02571fd..55531895dde6 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -33,6 +33,7 @@ #include <linux/pm_runtime.h> #include <linux/slab.h> +#include <drm/drm_dsc.h> #include <video/mipi_display.h> /** @@ -549,6 +550,56 @@ 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 + * @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 }; + struct mipi_dsi_msg msg = { + .channel = dsi->channel, + .type = MIPI_DSI_COMPRESSION_MODE, + .tx_len = sizeof(tx), + .tx_buf = tx, + }; + int ret = mipi_dsi_device_transfer(dsi, &msg); + + return (ret < 0) ? ret : 0; +} +EXPORT_SYMBOL(mipi_dsi_compression_mode); + +/** + * mipi_dsi_picture_parameter_set() - transmit the DSC PPS to the peripheral + * @dsi: DSI peripheral device + * @pps: VESA DSC 1.1 Picture Parameter Set + * + * Transmit the VESA DSC 1.1 Picture Parameter Set to the peripheral. + * + * Return: 0 on success or a negative error code on failure. + */ +ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi, + const struct drm_dsc_picture_parameter_set *pps) +{ + struct mipi_dsi_msg msg = { + .channel = dsi->channel, + .type = MIPI_DSI_PICTURE_PARAMETER_SET, + .tx_len = sizeof(*pps), + .tx_buf = pps, + }; + int ret = mipi_dsi_device_transfer(dsi, &msg); + + return (ret < 0) ? ret : 0; +} +EXPORT_SYMBOL(mipi_dsi_picture_parameter_set); + +/** * mipi_dsi_generic_write() - transmit data using a generic write packet * @dsi: DSI peripheral device * @payload: buffer containing the payload |