[PATCH v2 10/15] drm/mxsfb: Add max-res property for MXSFB
From: Robert Chiras <robert.chiras@nxp.com>
Date: 2019-08-14 10:49:34
Also in:
dri-devel, linux-devicetree, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, mxsfb drm driver, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Marek Vasut, Stefan Agner, Linus Torvalds
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 59c8ba7..6dae2bd 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c@@ -264,6 +264,7 @@ 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);
@@ -344,10 +345,17 @@ 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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