Add the extended version of mipi_dsi_compression_mode(). It provides
a way to specify the algorithm and PPS selector.
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
drivers/gpu/drm/drm_mipi_dsi.c | 33 +++++++++++++++++++++++++++------
include/drm/drm_mipi_dsi.h | 9 +++++++++
2 files changed, 36 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 9874ff6d4718..0ecbc811eb7a 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -645,19 +645,24 @@ 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 algorithm
+ * @pps_selector: The PPS selector
*
- * 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 data = (enable << 0) |
+ (algo << 1) |
+ (pps_selector << 4);
+ u8 tx[2] = { data, 0 };
struct mipi_dsi_msg msg = {
.channel = dsi->channel,
.type = MIPI_DSI_COMPRESSION_MODE,
@@ -668,6 +673,22 @@ int mipi_dsi_compression_mode(struct mipi_dsi_device *dsi,
bool enable)
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, 0,
MIPI_DSI_COMPRESSION_DSC);
+}
EXPORT_SYMBOL(mipi_dsi_compression_mode);
/**
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 3011d33eccbd..78cb7b688b1d 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -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,
+ unsigned int pps_selector,
+ enum mipi_dsi_compression_algo algo);
int mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi,
const struct drm_dsc_picture_parameter_set
*pps);
--
2.39.2
