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drm/mipi-dsi: add mipi_dsi_compression_mode_ext()

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

Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240408-lg-sw43408-panel-v5-3-4e092da22991@linaro.org
This commit is contained in:
Dmitry Baryshkov 2024-04-08 02:53:52 +03:00
parent de1c705c50
commit b724455e89
2 changed files with 47 additions and 11 deletions
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49
drivers/gpu/drm/drm_mipi_dsi.c
View File

@ -644,6 +644,43 @@ 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_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.
*
* Return: 0 on success or a negative error code on failure.
*/
int mipi_dsi_compression_mode_ext(struct mipi_dsi_device *dsi, bool enable,
enum mipi_dsi_compression_algo algo,
unsigned int pps_selector)
{
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;
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
@ -656,17 +693,7 @@ EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size);
*/
int 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;
return mipi_dsi_compression_mode_ext(dsi, enable, MIPI_DSI_COMPRESSION_DSC, 0);
}
EXPORT_SYMBOL(mipi_dsi_compression_mode);

9
include/drm/drm_mipi_dsi.h
View File

@ -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);