[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1565779731-1300-11-git-send-email-robert.chiras@nxp.com>
Date: Wed, 14 Aug 2019 13:48:46 +0300
From: Robert Chiras <robert.chiras@....com>
To: Guido Günther <agx@...xcpu.org>,
Marek Vasut <marex@...x.de>, Stefan Agner <stefan@...er.ch>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Fabio Estevam <festevam@...il.com>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>,
NXP Linux Team <linux-imx@....com>,
dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 10/15] drm/mxsfb: Add max-res property for MXSFB
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@....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
Powered by blists - more mailing lists