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drm: bridge: samsung-dsim: Add i.MX8M Plus support 

Add extras to support i.MX8M Plus. The main change is the removal of
HS/VS/DE signal inversion in the LCDIFv3-DSIM glue logic, otherwise
the implementation of this IP in i.MX8M Plus is very much compatible
with the i.MX8M Mini/Nano one.

Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Inki Dae <m.szyprowski@samsung.com>
This commit is contained in:
Marek Vasut 2023-03-08 22:09:53 +05:30 committed by Inki Dae
parent 073b8f9e8e
commit b2cfec52fe
2 changed files with 24 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/gpu/drm/bridge/samsung-dsim.c
View File

@ -479,6 +479,7 @@ samsung_dsim_types[DSIM_TYPE_COUNT] = {
[DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data,
[DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data,
[DSIM_TYPE_IMX8MM] = &imx8mm_dsi_driver_data,
[DSIM_TYPE_IMX8MP] = &imx8mm_dsi_driver_data,
};
static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h)
@ -1452,10 +1453,17 @@ static int samsung_dsim_atomic_check(struct drm_bridge *bridge,
* 13.6.2.7.2 RGB interface
* both claim "Vsync, Hsync, and VDEN are active high signals.", the
* LCDIF must generate inverted HS/VS/DE signals, i.e. active LOW.
*
* The i.MX8M Plus glue logic between LCDIFv3 and DSIM does not
* implement the same behavior, therefore LCDIFv3 must generate
* HS/VS/DE signals active HIGH.
*/
if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM) {
adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
} else if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MP) {
adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
}
return 0;
@ -1723,6 +1731,10 @@ static const struct samsung_dsim_host_ops generic_dsim_host_ops = {
.unregister_host = generic_dsim_unregister_host,
};
static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_high = {
.input_bus_flags = DRM_BUS_FLAG_DE_HIGH,
};
static const struct drm_bridge_timings samsung_dsim_bridge_timings_de_low = {
.input_bus_flags = DRM_BUS_FLAG_DE_LOW,
};
@ -1812,6 +1824,8 @@ int samsung_dsim_probe(struct platform_device *pdev)
/* 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 = &samsung_dsim_bridge_timings_de_low;
else
dsi->bridge.timings = &samsung_dsim_bridge_timings_de_high;
if (dsi->plat_data->host_ops && dsi->plat_data->host_ops->register_host)
ret = dsi->plat_data->host_ops->register_host(dsi);
@ -1917,11 +1931,20 @@ static const struct samsung_dsim_plat_data samsung_dsim_imx8mm_pdata = {
.host_ops = &generic_dsim_host_ops,
};
static const struct samsung_dsim_plat_data samsung_dsim_imx8mp_pdata = {
.hw_type = DSIM_TYPE_IMX8MP,
.host_ops = &generic_dsim_host_ops,
};
static const struct of_device_id samsung_dsim_of_match[] = {
{
.compatible = "fsl,imx8mm-mipi-dsim",
.data = &samsung_dsim_imx8mm_pdata,
},
{
.compatible = "fsl,imx8mp-mipi-dsim",
.data = &samsung_dsim_imx8mp_pdata,
},
{ /* sentinel. */ }
};
MODULE_DEVICE_TABLE(of, samsung_dsim_of_match);

1
include/drm/bridge/samsung-dsim.h
View File

@ -28,6 +28,7 @@ enum samsung_dsim_type {
DSIM_TYPE_EXYNOS5422,
DSIM_TYPE_EXYNOS5433,
DSIM_TYPE_IMX8MM,
DSIM_TYPE_IMX8MP,
DSIM_TYPE_COUNT,
};