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OMAPDSS: DSI: Parse lane config 

Parse the lane configuration from the device data into internal lane
config format. This will be used in the following patches to clean up
the lane handling.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2011-10-13 11:22:06 +03:00
parent d982085050
commit 739a7f46cb
1 changed files with 83 additions and 0 deletions
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83
drivers/video/omap2/dss/dsi.c
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@ -203,6 +203,21 @@ struct dsi_reg { u16 idx; };
typedef void (*omap_dsi_isr_t) (void *arg, u32 mask);
#define DSI_MAX_NR_ISRS 2
#define DSI_MAX_NR_LANES 5
enum dsi_lane_function {
DSI_LANE_UNUSED = 0,
DSI_LANE_CLK,
DSI_LANE_DATA1,
DSI_LANE_DATA2,
DSI_LANE_DATA3,
DSI_LANE_DATA4,
};
struct dsi_lane_config {
enum dsi_lane_function function;
u8 polarity;
};
struct dsi_isr_data {
omap_dsi_isr_t isr;
@ -329,6 +344,9 @@ struct dsi_data {
unsigned num_lanes_supported;
struct dsi_lane_config lanes[DSI_MAX_NR_LANES];
unsigned num_lanes_used;
unsigned scp_clk_refcount;
};
@ -2077,6 +2095,65 @@ static unsigned dsi_get_line_buf_size(struct platform_device *dsidev)
}
}
static int dsi_parse_lane_config(struct omap_dss_device *dssdev)
{
struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
u8 lanes[DSI_MAX_NR_LANES];
u8 polarities[DSI_MAX_NR_LANES];
int num_lanes, i;
static const enum dsi_lane_function functions[] = {
DSI_LANE_CLK,
DSI_LANE_DATA1,
DSI_LANE_DATA2,
DSI_LANE_DATA3,
DSI_LANE_DATA4,
};
lanes[0] = dssdev->phy.dsi.clk_lane;
lanes[1] = dssdev->phy.dsi.data1_lane;
lanes[2] = dssdev->phy.dsi.data2_lane;
lanes[3] = dssdev->phy.dsi.data3_lane;
lanes[4] = dssdev->phy.dsi.data4_lane;
polarities[0] = dssdev->phy.dsi.clk_pol;
polarities[1] = dssdev->phy.dsi.data1_pol;
polarities[2] = dssdev->phy.dsi.data2_pol;
polarities[3] = dssdev->phy.dsi.data3_pol;
polarities[4] = dssdev->phy.dsi.data4_pol;
num_lanes = 0;
for (i = 0; i < dsi->num_lanes_supported; ++i)
dsi->lanes[i].function = DSI_LANE_UNUSED;
for (i = 0; i < dsi->num_lanes_supported; ++i) {
int num;
if (lanes[i] == DSI_LANE_UNUSED)
break;
num = lanes[i] - 1;
if (num >= dsi->num_lanes_supported)
return -EINVAL;
if (dsi->lanes[num].function != DSI_LANE_UNUSED)
return -EINVAL;
dsi->lanes[num].function = functions[i];
dsi->lanes[num].polarity = polarities[i];
num_lanes++;
}
if (num_lanes < 2 || num_lanes > dsi->num_lanes_supported)
return -EINVAL;
dsi->num_lanes_used = num_lanes;
return 0;
}
static void dsi_set_lane_config(struct omap_dss_device *dssdev)
{
struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);
@ -4328,6 +4405,12 @@ static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
int dsi_module = dsi_get_dsidev_id(dsidev);
int r;
r = dsi_parse_lane_config(dssdev);
if (r) {
DSSERR("illegal lane config");
goto err0;
}
r = dsi_pll_init(dsidev, true, true);
if (r)
goto err0;