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drm/omap: dsi: cleanup initial vc setup 

As we now have a fixed setup for VCs (VC0 for video stream, VC1 for
commands), we can simplify the VC setup.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-80-tomi.valkeinen@ti.com
This commit is contained in:
Tomi Valkeinen 2020-12-15 12:46:52 +02:00
parent a4a29d1d34
commit 7b93de9899
1 changed files with 31 additions and 54 deletions
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85
drivers/gpu/drm/omapdrm/dss/dsi.c
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@ -2019,40 +2019,6 @@ static void dsi_vc_initial_config(struct dsi_data *dsi, int vc)
dsi->vc[vc].source = DSI_VC_SOURCE_L4;
}
static int dsi_vc_config_source(struct dsi_data *dsi, int vc,
enum dsi_vc_source source)
{
if (dsi->vc[vc].source == source)
return 0;
DSSDBG("Source config of VC %d", vc);
dsi_sync_vc(dsi, vc);
dsi_vc_enable(dsi, vc, 0);
/* VC_BUSY */
if (!wait_for_bit_change(dsi, DSI_VC_CTRL(vc), 15, 0)) {
DSSERR("vc(%d) busy when trying to config for VP\n", vc);
return -EIO;
}
/* SOURCE, 0 = L4, 1 = video port */
REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), source, 1, 1);
/* DCS_CMD_ENABLE */
if (dsi->data->quirks & DSI_QUIRK_DCS_CMD_CONFIG_VC) {
bool enable = source == DSI_VC_SOURCE_VP;
REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), enable, 30, 30);
}
dsi_vc_enable(dsi, vc, 1);
dsi->vc[vc].source = source;
return 0;
}
static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int vc,
bool enable)
{
@ -2074,10 +2040,6 @@ static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int vc,
dsi_if_enable(dsi, 1);
dsi_force_tx_stop_mode_io(dsi);
/* start the DDR clock by sending a NULL packet */
if (dsi->vm_timings.ddr_clk_always_on && enable)
dsi_vc_send_null(dsi, vc, dsi->dsidev->channel);
}
static void dsi_vc_flush_long_data(struct dsi_data *dsi, int vc)
@ -2272,8 +2234,6 @@ static int dsi_vc_send_long(struct dsi_data *dsi, int vc,
return -EINVAL;
}
dsi_vc_config_source(dsi, vc, DSI_VC_SOURCE_L4);
dsi_vc_write_long_header(dsi, vc, msg->channel, msg->type, msg->tx_len, 0);
p = msg->tx_buf;
@ -2333,8 +2293,6 @@ static int dsi_vc_send_short(struct dsi_data *dsi, int vc,
DSSDBG("dsi_vc_send_short(vc%d, dt %#x, b1 %#x, b2 %#x)\n",
vc, msg->type, pkt.header[1], pkt.header[2]);
dsi_vc_config_source(dsi, vc, DSI_VC_SOURCE_L4);
if (FLD_GET(dsi_read_reg(dsi, DSI_VC_CTRL(vc)), 16, 16)) {
DSSERR("ERROR FIFO FULL, aborting transfer\n");
return -EINVAL;
@ -3353,8 +3311,6 @@ static void dsi_update_screen_dispc(struct dsi_data *dsi)
DSSDBG("dsi_update_screen_dispc(%dx%d)\n", w, h);
dsi_vc_config_source(dsi, vc, DSI_VC_SOURCE_VP);
bytespp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) / 8;
bytespl = w * bytespp;
bytespf = bytespl * h;
@ -3519,14 +3475,12 @@ static int dsi_update_channel(struct omap_dss_device *dssdev, int vc)
dsi_set_ulps_auto(dsi, false);
dsi_vc_enable_hs(dssdev, vc, true);
/*
* Send NOP between the frames. If we don't send something here, the
* updates stop working. This is probably related to DSI spec stating
* that the DSI host should transition to LP at least once per frame.
*/
r = _dsi_send_nop(dsi, vc, dsi->dsidev->channel);
r = _dsi_send_nop(dsi, VC_CMD, dsi->dsidev->channel);
if (r < 0) {
DSSWARN("failed to send nop between frames: %d\n", r);
goto err;
@ -3651,6 +3605,35 @@ static int dsi_configure_dsi_clocks(struct dsi_data *dsi)
return 0;
}
static void dsi_setup_dsi_vcs(struct dsi_data *dsi)
{
/* Setup VC_CMD for LP and cpu transfers */
REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_CMD), 0, 9, 9); /* LP */
REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_CMD), 0, 1, 1); /* SOURCE_L4 */
dsi->vc[VC_CMD].source = DSI_VC_SOURCE_L4;
/* Setup VC_VIDEO for HS and dispc transfers */
REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_VIDEO), 1, 9, 9); /* HS */
REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_VIDEO), 1, 1, 1); /* SOURCE_VP */
dsi->vc[VC_VIDEO].source = DSI_VC_SOURCE_VP;
if (dsi->data->quirks & DSI_QUIRK_DCS_CMD_CONFIG_VC)
REG_FLD_MOD(dsi, DSI_VC_CTRL(VC_VIDEO), 1, 30, 30); /* DCS_CMD_ENABLE */
dsi_vc_enable(dsi, VC_CMD, 1);
dsi_vc_enable(dsi, VC_VIDEO, 1);
dsi_if_enable(dsi, 1);
dsi_force_tx_stop_mode_io(dsi);
/* start the DDR clock by sending a NULL packet */
if (dsi->vm_timings.ddr_clk_always_on)
dsi_vc_send_null(dsi, VC_CMD, dsi->dsidev->channel);
}
static int dsi_init_dsi(struct dsi_data *dsi)
{
int r;
@ -3693,13 +3676,7 @@ static int dsi_init_dsi(struct dsi_data *dsi)
if (r)
goto err3;
/* enable interface */
dsi_vc_enable(dsi, 0, 1);
dsi_vc_enable(dsi, 1, 1);
dsi_vc_enable(dsi, 2, 1);
dsi_vc_enable(dsi, 3, 1);
dsi_if_enable(dsi, 1);
dsi_force_tx_stop_mode_io(dsi);
dsi_setup_dsi_vcs(dsi);
return 0;
err3: