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authorAnatolij Gustschin <agust@denx.de>2010-07-23 08:00:39 +0400
committerGrant Likely <grant.likely@secretlab.ca>2010-08-02 03:06:44 +0400
commit8b856f040c09024aa9d1f363c1a5cf2d3db73ebd (patch)
treef837d2cd8b2c133932e9741a04fc82020c4c58d5
parenta027b33348df3512d7680eed29bada1247f01ad7 (diff)
downloadlinux-8b856f040c09024aa9d1f363c1a5cf2d3db73ebd.tar.xz
powerpc/fsl-diu-fb: Support setting display mode using EDID
Adds support for encoding display mode information in the device tree using verbatim EDID block. If the EDID entry in the DIU node is present, the driver will build mode database using EDID data and allow setting the display modes from this database. Otherwise display mode will be set using mode entries from driver's internal database as usual. This patch also updates device tree bindings. Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Timur Tabi <timur@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
-rw-r--r--Documentation/powerpc/dts-bindings/fsl/diu.txt6
-rw-r--r--drivers/video/Kconfig1
-rw-r--r--drivers/video/fsl-diu-fb.c80
3 files changed, 81 insertions, 6 deletions
diff --git a/Documentation/powerpc/dts-bindings/fsl/diu.txt b/Documentation/powerpc/dts-bindings/fsl/diu.txt
index 326cddfd7c25..b66cb6d31d69 100644
--- a/Documentation/powerpc/dts-bindings/fsl/diu.txt
+++ b/Documentation/powerpc/dts-bindings/fsl/diu.txt
@@ -11,6 +11,11 @@ Required properties:
- interrupt-parent : the phandle for the interrupt controller that
services interrupts for this device.
+Optional properties:
+- edid : verbatim EDID data block describing attached display.
+ Data from the detailed timing descriptor will be used to
+ program the display controller.
+
Example (MPC8610HPCD):
display@2c000 {
compatible = "fsl,diu";
@@ -25,4 +30,5 @@ Example for MPC5121:
reg = <0x2100 0x100>;
interrupts = <64 0x8>;
interrupt-parent = <&ipic>;
+ edid = [edid-data];
};
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 3d94a1471724..114aeb0d9971 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1871,6 +1871,7 @@ config FB_MBX_DEBUG
config FB_FSL_DIU
tristate "Freescale DIU framebuffer support"
depends on FB && FSL_SOC
+ select FB_MODE_HELPERS
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index db3e360e6aad..e38ad2224540 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -35,6 +35,7 @@
#include <sysdev/fsl_soc.h>
#include <linux/fsl-diu-fb.h>
+#include "edid.h"
/*
* These parameters give default parameters
@@ -217,6 +218,7 @@ struct mfb_info {
int x_aoi_d; /* aoi display x offset to physical screen */
int y_aoi_d; /* aoi display y offset to physical screen */
struct fsl_diu_data *parent;
+ u8 *edid_data;
};
@@ -1185,18 +1187,30 @@ static int __devinit install_fb(struct fb_info *info)
int rc;
struct mfb_info *mfbi = info->par;
const char *aoi_mode, *init_aoi_mode = "320x240";
+ struct fb_videomode *db = fsl_diu_mode_db;
+ unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
+ int has_default_mode = 1;
if (init_fbinfo(info))
return -EINVAL;
- if (mfbi->index == 0) /* plane 0 */
+ if (mfbi->index == 0) { /* plane 0 */
+ if (mfbi->edid_data) {
+ /* Now build modedb from EDID */
+ fb_edid_to_monspecs(mfbi->edid_data, &info->monspecs);
+ fb_videomode_to_modelist(info->monspecs.modedb,
+ info->monspecs.modedb_len,
+ &info->modelist);
+ db = info->monspecs.modedb;
+ dbsize = info->monspecs.modedb_len;
+ }
aoi_mode = fb_mode;
- else
+ } else {
aoi_mode = init_aoi_mode;
+ }
pr_debug("mode used = %s\n", aoi_mode);
- rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
- ARRAY_SIZE(fsl_diu_mode_db), &fsl_diu_default_mode, default_bpp);
-
+ rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize,
+ &fsl_diu_default_mode, default_bpp);
switch (rc) {
case 1:
pr_debug("using mode specified in @mode\n");
@@ -1214,10 +1228,50 @@ static int __devinit install_fb(struct fb_info *info)
default:
pr_debug("rc = %d\n", rc);
pr_debug("failed to find mode\n");
- return -EINVAL;
+ /*
+ * For plane 0 we continue and look into
+ * driver's internal modedb.
+ */
+ if (mfbi->index == 0 && mfbi->edid_data)
+ has_default_mode = 0;
+ else
+ return -EINVAL;
break;
}
+ if (!has_default_mode) {
+ rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
+ ARRAY_SIZE(fsl_diu_mode_db),
+ &fsl_diu_default_mode,
+ default_bpp);
+ if (rc > 0 && rc < 5)
+ has_default_mode = 1;
+ }
+
+ /* Still not found, use preferred mode from database if any */
+ if (!has_default_mode && info->monspecs.modedb) {
+ struct fb_monspecs *specs = &info->monspecs;
+ struct fb_videomode *modedb = &specs->modedb[0];
+
+ /*
+ * Get preferred timing. If not found,
+ * first mode in database will be used.
+ */
+ if (specs->misc & FB_MISC_1ST_DETAIL) {
+ int i;
+
+ for (i = 0; i < specs->modedb_len; i++) {
+ if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
+ modedb = &specs->modedb[i];
+ break;
+ }
+ }
+ }
+
+ info->var.bits_per_pixel = default_bpp;
+ fb_videomode_to_var(&info->var, modedb);
+ }
+
pr_debug("xres_virtual %d\n", info->var.xres_virtual);
pr_debug("bits_per_pixel %d\n", info->var.bits_per_pixel);
@@ -1256,6 +1310,9 @@ static void uninstall_fb(struct fb_info *info)
if (!mfbi->registered)
return;
+ if (mfbi->index == 0)
+ kfree(mfbi->edid_data);
+
unregister_framebuffer(info);
unmap_video_memory(info);
if (&info->cmap)
@@ -1456,6 +1513,17 @@ static int __devinit fsl_diu_probe(struct of_device *ofdev,
mfbi = machine_data->fsl_diu_info[i]->par;
memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
mfbi->parent = machine_data;
+
+ if (mfbi->index == 0) {
+ const u8 *prop;
+ int len;
+
+ /* Get EDID */
+ prop = of_get_property(np, "edid", &len);
+ if (prop && len == EDID_LENGTH)
+ mfbi->edid_data = kmemdup(prop, EDID_LENGTH,
+ GFP_KERNEL);
+ }
}
ret = of_address_to_resource(np, 0, &res);