Simplify the DSI encoder by using mipi_dsi_msg for dsi_vc_send_long and dsi_vc_send_short. Further improvements require cleaning up the channel allocation code first.
Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com --- drivers/gpu/drm/omapdrm/dss/dsi.c | 92 +++++++++++++++---------------- 1 file changed, 45 insertions(+), 47 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index c22d438ae2b5..d39b84409656 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -2599,30 +2599,36 @@ static inline void dsi_vc_write_long_payload(struct dsi_data *dsi, int channel, dsi_write_reg(dsi, DSI_VC_LONG_PACKET_PAYLOAD(channel), val); }
-static int dsi_vc_send_long(struct dsi_data *dsi, int channel, u8 data_type, - const u8 *data, u16 len, u8 ecc) +static int dsi_vc_send_long(struct dsi_data *dsi, + const struct mipi_dsi_msg *msg) { + struct mipi_dsi_packet pkg; /*u32 val; */ int i; const u8 *p; int r = 0; u8 b1, b2, b3, b4;
+ r = mipi_dsi_create_packet(&pkg, msg); + if (r < 0) + return r; + if (dsi->debug_write) - DSSDBG("dsi_vc_send_long, %d bytes\n", len); + DSSDBG("dsi_vc_send_long, %d bytes\n", msg->tx_len);
/* len + header */ - if (dsi->vc[channel].tx_fifo_size * 32 * 4 < len + 4) { + if (dsi->vc[msg->channel].tx_fifo_size * 32 * 4 < msg->tx_len + 4) { DSSERR("unable to send long packet: packet too long.\n"); return -EINVAL; }
- dsi_vc_config_source(dsi, channel, DSI_VC_SOURCE_L4); + dsi_vc_config_source(dsi, msg->channel, DSI_VC_SOURCE_L4);
- dsi_vc_write_long_header(dsi, channel, data_type, len, ecc); + dsi_vc_write_long_header(dsi, msg->channel, msg->type, msg->tx_len, + pkg.header[3]);
- p = data; - for (i = 0; i < len >> 2; i++) { + p = msg->tx_buf; + for (i = 0; i < msg->tx_len >> 2; i++) { if (dsi->debug_write) DSSDBG("\tsending full packet %d\n", i);
@@ -2631,10 +2637,10 @@ static int dsi_vc_send_long(struct dsi_data *dsi, int channel, u8 data_type, b3 = *p++; b4 = *p++;
- dsi_vc_write_long_payload(dsi, channel, b1, b2, b3, b4); + dsi_vc_write_long_payload(dsi, msg->channel, b1, b2, b3, b4); }
- i = len % 4; + i = msg->tx_len % 4; if (i) { b1 = 0; b2 = 0; b3 = 0;
@@ -2656,64 +2662,64 @@ static int dsi_vc_send_long(struct dsi_data *dsi, int channel, u8 data_type, break; }
- dsi_vc_write_long_payload(dsi, channel, b1, b2, b3, 0); + dsi_vc_write_long_payload(dsi, msg->channel, b1, b2, b3, 0); }
return r; }
-static int dsi_vc_send_short(struct dsi_data *dsi, int channel, u8 data_type, - u16 data, u8 ecc) +static int dsi_vc_send_short(struct dsi_data *dsi, + const struct mipi_dsi_msg *msg) { + struct mipi_dsi_packet pkg; u32 r; - u8 data_id; + + r = mipi_dsi_create_packet(&pkg, msg); + if (r < 0) + return r;
WARN_ON(!dsi_bus_is_locked(dsi));
if (dsi->debug_write) DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n", - channel, - data_type, data & 0xff, (data >> 8) & 0xff); + msg->channel, + msg->type, pkg.header[1], pkg.header[2]);
- dsi_vc_config_source(dsi, channel, DSI_VC_SOURCE_L4); + dsi_vc_config_source(dsi, msg->channel, DSI_VC_SOURCE_L4);
- if (FLD_GET(dsi_read_reg(dsi, DSI_VC_CTRL(channel)), 16, 16)) { + if (FLD_GET(dsi_read_reg(dsi, DSI_VC_CTRL(msg->channel)), 16, 16)) { DSSERR("ERROR FIFO FULL, aborting transfer\n"); return -EINVAL; }
- data_id = data_type | channel << 6; - - r = (data_id << 0) | (data << 8) | (ecc << 24); + r = pkg.header[3] << 24 | pkg.header[2] << 16 | pkg.header[1] << 8 | + pkg.header[0];
- dsi_write_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel), r); + dsi_write_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(msg->channel), r);
return 0; }
static int dsi_vc_send_null(struct dsi_data *dsi, int channel) { - return dsi_vc_send_long(dsi, channel, MIPI_DSI_NULL_PACKET, NULL, 0, 0); + const struct mipi_dsi_msg msg = { + .channel = channel, + .type = MIPI_DSI_NULL_PACKET, + }; + + return dsi_vc_send_long(dsi, &msg); }
static int dsi_vc_write_common(struct omap_dss_device *dssdev, const struct mipi_dsi_msg *msg) { struct dsi_data *dsi = to_dsi_data(dssdev); - struct mipi_dsi_packet packet; int r;
- r = mipi_dsi_create_packet(&packet, msg); - if (r < 0) - return r; - - if (mipi_dsi_packet_format_is_short(msg->type)) { - u16 data = packet.header[1] | (packet.header[2] << 8); - r = dsi_vc_send_short(dsi, msg->channel, msg->type, data, 0); - } else { - r = dsi_vc_send_long(dsi, msg->channel, msg->type, - msg->tx_buf, msg->tx_len, 0); - } + if (mipi_dsi_packet_format_is_short(msg->type)) + r = dsi_vc_send_short(dsi, msg); + else + r = dsi_vc_send_long(dsi, msg);
if (r < 0) return r; @@ -2853,10 +2859,10 @@ static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, const struct mipi_dsi_msg *msg) { struct dsi_data *dsi = to_dsi_data(dssdev); + u8 cmd = ((u8*) msg->tx_buf)[0]; int r; - u8 dcs_cmd = ((u8*) msg->tx_buf)[0];
- r = dsi_vc_send_short(dsi, msg->channel, MIPI_DSI_DCS_READ, dcs_cmd, 0); + r = dsi_vc_send_short(dsi, msg); if (r) goto err;
@@ -2877,7 +2883,7 @@ static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, return 0; err: DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n", - msg->channel, dcs_cmd); + msg->channel, cmd); return r; }
@@ -2885,17 +2891,9 @@ static int dsi_vc_generic_read(struct omap_dss_device *dssdev, const struct mipi_dsi_msg *msg) { struct dsi_data *dsi = to_dsi_data(dssdev); - struct mipi_dsi_packet packet; - u16 data; int r;
- r = mipi_dsi_create_packet(&packet, msg); - if (r < 0) - goto err; - - data = packet.header[1] | (packet.header[2] << 8); - - r = dsi_vc_send_short(dsi, msg->channel, msg->type, data, 0); + r = dsi_vc_send_short(dsi, msg); if (r) goto err;