From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZC3lN-0002TB-Tk for barebox@lists.infradead.org; Mon, 06 Jul 2015 10:36:39 +0000 From: Sascha Hauer Date: Mon, 6 Jul 2015 12:36:13 +0200 Message-Id: <1436178974-20064-8-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1436178974-20064-1-git-send-email-s.hauer@pengutronix.de> References: <1436178974-20064-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 8/9] video: Add generic fixup handler to reserve fb memory To: Barebox List When a framebuffer is kept enabled when Linux starts its framebuffer memory should be reserved. Otherwise Linux may overwrite its contents. Signed-off-by: Sascha Hauer --- drivers/video/fb.c | 21 +++++++++++++++++++++ include/fb.h | 1 + 2 files changed, 22 insertions(+) diff --git a/drivers/video/fb.c b/drivers/video/fb.c index e30ab59..931c99c 100644 --- a/drivers/video/fb.c +++ b/drivers/video/fb.c @@ -103,6 +103,27 @@ static int fb_setup_mode(struct fb_info *info) return 0; } +static int fb_of_reserve_fixup(struct device_node *root, void *context) +{ + struct fb_info *info = context; + + if (!info->enabled) + return 0; + + of_add_reserve_entry((unsigned long)info->screen_base, + (unsigned long)info->screen_base + info->screen_size); + + return 0; +} + +void fb_of_reserve_add_fixup(struct fb_info *info) +{ + if (!IS_ENABLED(CONFIG_OFDEVICE)) + return; + + of_register_fixup(fb_of_reserve_fixup, info); +} + static int fb_set_modename(struct param_d *param, void *priv) { struct fb_info *info = priv; diff --git a/include/fb.h b/include/fb.h index 2db6ad6..a693f4b 100644 --- a/include/fb.h +++ b/include/fb.h @@ -159,5 +159,6 @@ int fb_register_simplefb(struct fb_info *info); int edid_to_display_timings(struct display_timings *, unsigned char *edid); void *edid_read_i2c(struct i2c_adapter *adapter); void fb_edid_add_modes(struct fb_info *info); +void fb_of_reserve_add_fixup(struct fb_info *info); #endif /* __FB_H */ -- 2.1.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox