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Subject[PATCH 06/10] drm/mxsfb: Add max-res property for MXSFB
Date
Because of stability issues, we may want to limit the maximum resolution
supported by the MXSFB (eLCDIF) driver.
This patch add support for a new property which we can use to impose such
limitation.

Signed-off-by: Robert Chiras <robert.chiras@nxp.com>
---
drivers/gpu/drm/mxsfb/mxsfb_drv.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
index 64575df..9a1ee70 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
@@ -260,6 +260,7 @@ static int mxsfb_load(struct drm_device *drm, unsigned long flags)
struct platform_device *pdev = to_platform_device(drm->dev);
struct mxsfb_drm_private *mxsfb;
struct resource *res;
+ u32 max_res[2] = {0, 0};
int ret;

mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
@@ -340,10 +341,17 @@ static int mxsfb_load(struct drm_device *drm, unsigned long flags)
}
}

+ of_property_read_u32_array(drm->dev->of_node, "max-res",
+ &max_res[0], 2);
+ if (!max_res[0])
+ max_res[0] = MXSFB_MAX_XRES;
+ if (!max_res[1])
+ max_res[1] = MXSFB_MAX_YRES;
+
drm->mode_config.min_width = MXSFB_MIN_XRES;
drm->mode_config.min_height = MXSFB_MIN_YRES;
- drm->mode_config.max_width = MXSFB_MAX_XRES;
- drm->mode_config.max_height = MXSFB_MAX_YRES;
+ drm->mode_config.max_width = max_res[0];
+ drm->mode_config.max_height = max_res[1];
drm->mode_config.funcs = &mxsfb_mode_config_funcs;
drm->mode_config.helper_private = &mxsfb_mode_config_helpers;

--
2.7.4
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