Instead of always sending commands in LP mode, respect the
MIPI_DSI_MSG_USE_LPM flag to decide how to send each message.  Also
request acks if MIPI_DSI_MSG_REQ_ACK is set.

Signed-off-by: John Keeping <redacted>
---
Unchanged in v2
---
  drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 16 +++++++++++++++-
  1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index 92dbc3e56603..15d33c3c8cb7 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c

@@ -542,6 +542,19 @@ static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
  	return 0;
  }
  
+static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
+				   const struct mipi_dsi_msg *msg)
+{
+	u32 val = 0;
+
+	if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
+		val |= EN_ACK_RQST;
+	if (msg->flags & MIPI_DSI_MSG_USE_LPM)
+		val |= CMD_MODE_ALL_LP;
+
+	dsi_write(dsi, DSI_CMD_MODE_CFG, val);
+}
+
  static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
  {
  	int ret;

@@ -634,6 +647,8 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
  	struct dw_mipi_dsi *dsi = host_to_dsi(host);
  	int ret;
  
+	dw_mipi_message_config(dsi, msg);
+
  	switch (msg->type) {
  	case MIPI_DSI_DCS_SHORT_WRITE:
  	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:

@@ -745,7 +760,6 @@ static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
  {
  	dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
  	dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
-	dsi_write(dsi, DSI_CMD_MODE_CFG, CMD_MODE_ALL_LP);
  	dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
  }