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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-22 20:43:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-22 20:43:40 -0700
commit437538267b672f9320833907f1b5acbb2605f4be (patch)
treed10173b35a5b86bc037bb2ece1b406d5575a2094 /drivers/video/via/via_aux_edid.c
parent9586c959bfc917695893bef0102433a7d0675691 (diff)
parent6bff98b455cf3e666fd0e3d0d908eba874de0eee (diff)
Merge tag 'fbdev-updates-for-3.4' of git://github.com/schandinat/linux-2.6
Pull fbdev updates for 3.4 from Florian Tobias Schandinat: - drivers for Samsung Exynos MIPI DSI and display port - i740fb to support those old Intel chips - large updates to OMAP, viafb and sh_mobile_lcdcfb - some updates to s3c-fb and udlfb, few patches to others Fix up conflicts in drivers/video/udlfb.c due to Key Sievers' fix making it in twice. * tag 'fbdev-updates-for-3.4' of git://github.com/schandinat/linux-2.6: (156 commits) Revert "video:uvesafb: Fix oops that uvesafb try to execute NX-protected page" OMAPDSS: register dss drivers in module init video: pxafb: add clk_prepare/clk_unprepare calls fbdev: bfin_adv7393fb: Drop needless include fbdev: sh_mipi_dsi: add extra phyctrl for sh_mipi_dsi_info fbdev: remove dependency of FB_SH_MOBILE_MERAM from FB_SH_MOBILE_LCDC Revert "MAINTAINERS: add entry for exynos mipi display drivers" fbdev: da8xx: add support for SP10Q010 display fbdev: da8xx:: fix reporting of the display timing info drivers/video/pvr2fb.c: ensure arguments to request_irq and free_irq are compatible OMAPDSS: APPLY: fix clearing shadow dirty flag with manual update fbdev: sh_mobile_meram: Implement system suspend/resume fbdev: sh_mobile_meram: Remove unneeded sanity checks fbdev: sh_mobile_meram: Don't perform update in register operation arm: mach-shmobile: Constify sh_mobile_meram_cfg structures fbdev: sh_mobile_lcdc: Don't store copy of platform data fbdev: sh_mobile_meram: Remove unused sh_mobile_meram_icb_cfg fields arm: mach-shmobile: Don't set MERAM ICB numbers in platform data fbdev: sh_mobile_meram: Allocate ICBs automatically fbdev: sh_mobile_meram: Use genalloc to manage MERAM allocation ...
Diffstat (limited to 'drivers/video/via/via_aux_edid.c')
-rw-r--r--drivers/video/via/via_aux_edid.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/video/via/via_aux_edid.c b/drivers/video/via/via_aux_edid.c
new file mode 100644
index 000000000000..754d4509033f
--- /dev/null
+++ b/drivers/video/via/via_aux_edid.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation;
+ * either version 2, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE.See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+/*
+ * generic EDID driver
+ */
+
+#include <linux/slab.h>
+#include <linux/fb.h>
+#include "via_aux.h"
+#include "../edid.h"
+
+
+static const char *name = "EDID";
+
+
+static void query_edid(struct via_aux_drv *drv)
+{
+ struct fb_monspecs *spec = drv->data;
+ unsigned char edid[EDID_LENGTH];
+ bool valid = false;
+
+ if (spec) {
+ fb_destroy_modedb(spec->modedb);
+ } else {
+ spec = kmalloc(sizeof(*spec), GFP_KERNEL);
+ if (!spec)
+ return;
+ }
+
+ spec->version = spec->revision = 0;
+ if (via_aux_read(drv, 0x00, edid, EDID_LENGTH)) {
+ fb_edid_to_monspecs(edid, spec);
+ valid = spec->version || spec->revision;
+ }
+
+ if (!valid) {
+ kfree(spec);
+ spec = NULL;
+ } else
+ printk(KERN_DEBUG "EDID: %s %s\n", spec->manufacturer, spec->monitor);
+
+ drv->data = spec;
+}
+
+static const struct fb_videomode *get_preferred_mode(struct via_aux_drv *drv)
+{
+ struct fb_monspecs *spec = drv->data;
+ int i;
+
+ if (!spec || !spec->modedb || !(spec->misc & FB_MISC_1ST_DETAIL))
+ return NULL;
+
+ for (i = 0; i < spec->modedb_len; i++) {
+ if (spec->modedb[i].flag & FB_MODE_IS_FIRST &&
+ spec->modedb[i].flag & FB_MODE_IS_DETAILED)
+ return &spec->modedb[i];
+ }
+
+ return NULL;
+}
+
+static void cleanup(struct via_aux_drv *drv)
+{
+ struct fb_monspecs *spec = drv->data;
+
+ if (spec)
+ fb_destroy_modedb(spec->modedb);
+}
+
+void via_aux_edid_probe(struct via_aux_bus *bus)
+{
+ struct via_aux_drv drv = {
+ .bus = bus,
+ .addr = 0x50,
+ .name = name,
+ .cleanup = cleanup,
+ .get_preferred_mode = get_preferred_mode};
+
+ query_edid(&drv);
+
+ /* as EDID devices can be connected/disconnected just add the driver */
+ via_aux_add(&drv);
+}