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drm/rp1: rp1-dsi: Add support for inverting lane polarities #7065

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Merged
pelwell merged 3 commits into from
Sep 25, 2025
Merged

drm/rp1: rp1-dsi: Add support for inverting lane polarities #7065

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372fe47
drm/rp1: rp1-dsi: Put all register defines into order
6by9 Sep 25, 2025
34a7487
drm/rp1: rp1-dsi: Remove all the unused boilerplate register defines
6by9 Sep 25, 2025
7e22e11
drm/rp1: rp1-dsi: Add support for inverting lane polarities
6by9 Sep 25, 2025
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10 changes: 9 additions & 1 deletion drivers/gpu/drm/rp1/rp1-dsi/rp1_dsi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -417,9 +417,11 @@ static const struct mipi_dsi_host_ops rp1dsi_mipi_dsi_host_ops = {
static int rp1dsi_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct device_node *endpoint;
struct drm_device *drm;
struct rp1_dsi *dsi;
int i, ret;
int i, nr_lanes, ret;

drm = drm_dev_alloc(&rp1dsi_driver, dev);
if (IS_ERR(drm)) {
Expand Down Expand Up @@ -459,6 +461,12 @@ static int rp1dsi_platform_probe(struct platform_device *pdev)
}
}

endpoint = of_graph_get_endpoint_by_regs(node, 0, -1);
nr_lanes = of_property_count_u32_elems(endpoint, "data-lanes");
if (nr_lanes > 0 && nr_lanes <= 4)
of_property_read_u32_array(endpoint, "lane-polarities",
dsi->lane_polarities, nr_lanes + 1);

for (i = 0; i < RP1DSI_NUM_HW_BLOCKS; i++) {
dsi->hw_base[i] =
devm_ioremap_resource(dev,
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3 changes: 3 additions & 0 deletions drivers/gpu/drm/rp1/rp1-dsi/rp1_dsi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,9 @@ struct rp1_dsi {
/* Clocks. We need DPI clock; the others are frequency references */
struct clk *clocks[RP1DSI_NUM_CLOCKS];

/* Device tree parsed information */
u32 lane_polarities[5];

/* Block (DSI DMA, DSI Host) base addresses, and current state */
void __iomem *hw_base[RP1DSI_NUM_HW_BLOCKS];
u32 cur_fmt;
Expand Down
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