From 739a7f46cbf6dc3d4f899e4b566196d99403457a Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Thu, 13 Oct 2011 11:22:06 +0300 Subject: [PATCH] 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 --- drivers/video/omap2/dss/dsi.c | 83 +++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c index 6a110b2bca4f..aea110c9d638 100644 --- a/drivers/video/omap2/dss/dsi.c +++ b/drivers/video/omap2/dss/dsi.c @@ -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; -- 2.20.1