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drm: exynos: dsi: Add input_bus_flags

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LCDIF-DSIM glue logic inverts the HS/VS/DE signals and expecting
the i.MX8M Mini/Nano DSI host to add additional Data Enable signal
active low (DE_LOW). This makes the valid data transfer on each
horizontal line.

So, add additional bus flags DE_LOW setting via input_bus_flags
for i.MX8M Mini/Nano platforms.

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Suggested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Jagan Teki
2023-03-08 22:09:45 +05:30
committed by Inki Dae
parent 88576e2388
commit 184f37e578
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/exynos/exynos_drm_dsi.c
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@@ -1736,6 +1736,10 @@ static const struct component_ops exynos_dsi_component_ops = {
.unbind = exynos_dsi_unbind,
};
static const struct drm_bridge_timings dsim_bridge_timings_de_low = {
.input_bus_flags = DRM_BUS_FLAG_DE_LOW,
};
static int exynos_dsi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1822,6 +1826,10 @@ static int exynos_dsi_probe(struct platform_device *pdev)
dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
dsi->bridge.pre_enable_prev_first = true;
/* DE_LOW: i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts HS/VS/DE */
if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM)
dsi->bridge.timings = &dsim_bridge_timings_de_low;
ret = component_add(dev, &exynos_dsi_component_ops);
if (ret)
goto err_disable_runtime;