Commit b724455e authored by Dmitry Baryshkov's avatar Dmitry Baryshkov
Browse files

drm/mipi-dsi: add mipi_dsi_compression_mode_ext() 



Add the extended version of mipi_dsi_compression_mode(). It provides
a way to specify the algorithm and PPS selector.

Reviewed-by: default avatarMarijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408-lg-sw43408-panel-v5-3-4e092da22991@linaro.org
parent de1c705c

drivers/gpu/drm/drm_mipi_dsi.c

+34 −7
Original line number Diff line number Diff line
@@ -645,29 +645,56 @@ 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

 * mipi_dsi_compression_mode_ext() - enable/disable DSC on the peripheral

 * @dsi: DSI peripheral device

 * @enable: Whether to enable or disable the DSC

 * @algo: Selected compression algorithm

 * @pps_selector: Select PPS from the table of pre-stored or uploaded PPS entries

 *

 * Enable or disable Display Stream Compression on the peripheral using the

 * default Picture Parameter Set and VESA DSC 1.1 algorithm.

 * Enable or disable Display Stream Compression on the peripheral.

 *

 * Return: 0 on success or a negative error code on failure.

 */

int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)

int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable,

				  enum mipi_dsi_compression_algo algo,

				  unsigned int pps_selector)

{

	/* Note: Needs updating for non-default PPS or algorithm */

	u8 tx[2] = { enable << 0, 0 };

	u8 tx[2] = { };

	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);

	int ret;



	if (algo > 3 || pps_selector > 3)

		return -EINVAL;



	tx[0] = (enable << 0) |

		(algo << 1) |

		(pps_selector << 4);



	ret = mipi_dsi_device_transfer(dsi, &msg);



	return (ret < 0) ? ret : 0;

}

EXPORT_SYMBOL(mipi_dsi_compression_mode_ext);



/**

 * 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.

 */

int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable)

{

	return mipi_dsi_compression_mode_ext(dsi, enable, MIPI_DSI_COMPRESSION_DSC, 0);

}

EXPORT_SYMBOL(mipi_dsi_compression_mode);



/**

include/drm/drm_mipi_dsi.h

+9 −0
Original line number Diff line number Diff line
@@ -226,6 +226,12 @@ static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt) 
	return -EINVAL;

}



enum mipi_dsi_compression_algo {

	MIPI_DSI_COMPRESSION_DSC = 0,

	MIPI_DSI_COMPRESSION_VENDOR = 3,

	/* other two values are reserved, DSI 1.3 */

};



struct mipi_dsi_device *

mipi_dsi_device_register_full(struct mipi_dsi_host *host,

			      const struct mipi_dsi_device_info *info);
@@ -242,6 +248,9 @@ 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);

int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable);

int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable,

				  enum mipi_dsi_compression_algo algo,

				  unsigned int pps_selector);

int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,

				   const struct drm_dsc_picture_parameter_set *pps);