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Message-Id: <20240330-lg-sw43408-panel-v1-2-f5580fc9f2da@linaro.org>
Date: Sat, 30 Mar 2024 05:59:29 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Sumit Semwal <sumit.semwal@...aro.org>,
Caleb Connolly <caleb.connolly@...aro.org>,
Neil Armstrong <neil.armstrong@...aro.org>,
Jessica Zhang <quic_jesszhan@...cinc.com>, Sam Ravnborg <sam@...nborg.org>,
David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: [PATCH 2/3] drm/mipi-dsi: add mipi_dsi_compression_mode_raw()
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@...aro.org>
---
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
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