Re: [PATCH v5 0/17] Add Analogix Core Display Port Driver
From: Yakir Yang
Date: Sat Oct 10 2015 - 10:32:16 EST
Hi Javier,
On 10/08/2015 08:40 AM, Yakir Yang wrote:
On 10/07/2015 07:25 PM, Javier Martinez Canillas wrote:
On 10/07/2015 01:05 PM, Yakir Yang wrote:
On 10/07/2015 05:26 PM, Javier Martinez Canillas wrote:
On 10/07/2015 11:02 AM, Yakir Yang wrote:
On 10/07/2015 04:46 PM, Javier Martinez Canillas wrote:
On 10/07/2015 08:25 AM, Yakir Yang wrote:
Hi all,
Friendly ping..... :)
Best regards,
- Yakir
Do you have a tree that I can use to test these patches?
Wow, thanks a lot, I do have a tree on github
[https://github.com/yakir-Yang/linux/tree/analogix_dp],
crossing my finger, wish things works...... ;)
I tried your analogix_dp branch on an Exynos5800 Peach Pi Chromebook
but the machine didn't boot. Unfortunately I need to do some soldering
to have a serial console on this board so don't have a kernel boot
log.
I'll let you know if I can get more info about this issue.
Whoops, sorry for the failed, much appreciated for your works.
Besides, I thought maybe I can find a Peach Pit Chromebook in my side,
I remember that some of our guys have brought one, but previously I
thought that mainline kernel wouldn't run on Peach Pit directly.
Great, mainline works correctly on all Exynos based Chromebooks.
Maybe you can email me the method the run mainline kernel on Peach
Pit, so I can debug the analogix_dp driver at the same time, that would
be great.
I wrote a little blog post explaining how to run mainline on these
boards:
http://blogs.s-osg.org/install-linux-mainline-kernel-distro-exynos-chromebooks/
That explains the simplest setup though so if you need a different one
(i.e: chain loading a non verified u-boot) or if you have any questions,
feel free to contact me in private and I can help you with the setup.
Ah, thanks, gonna to step-by-step.
Thanks for your great material, although I meet some problems in the
step-by-step
process, and failed at this way to setup mainline kernel environment on
Exynos chromebooks.
But i do find another way to install mainline kernel to Exynos Chromebook:
1. Install any ChromeOS image into a USB media device (like dd tools)
2. "enable_dev_usb_boot" on Exynos chromebooks which would allowed boot
from USB.
3. Flash the mainline kernel into the KERNEL-A and KERNEL-B partitions
on host PC.
4. Insert USB device into Exynos chromebooks, and press CTRL+U, boot
into USB OS.
And it's better to enable pstore function on mainline kernel, so we can
analysis the last log when
the mainline kernel crashed. After enable PSTORE_RAM in .config, we
still need add ramoops node
into file, like:
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -750,6 +750,15 @@
iommu = <&sysmmu_gsc3>;
};
+ ramoops: ramoops {
+ compatible = "ramoops";
+ name = "ramoops";
+ reg = <0x41f00000 0x100000>;
+ record-size = <0x20000>;
+ dump-oops;
+ status = "okay";
+ };
+
hdmi: hdmi {
compatible = "samsung,exynos4212-hdmi";
reg = <0x14530000 0x70000>;
Aha, I have tested this series on two Exynos Chromebooks that I
borrowed(Snow and Peach Pit)
with previously method (actually I believed it's a common method without
broken the original
ChromeOS image).
And I do find the crash place that make you failed at this series, here
is the diff changes:
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 5f8fc11..bcbc009 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1169,6 +1169,7 @@ static int analogix_dp_create_bridge(struct
drm_device *drm_dev,
dp->bridge = bridge;
+ dp->encoder->bridge = bridge;
bridge->driver_private = dp;
bridge->encoder = dp->encoder;
bridge->funcs = &analogix_dp_bridge_funcs;
--- a/arch/arm/boot/dts/exynos5420-peach-pit.dts
+++ b/arch/arm/boot/dts/exynos5420-peach-pit.dts
@@ -151,7 +151,7 @@
samsung,color-depth = <1>;
samsung,link-rate = <0x06>;
samsung,lane-count = <2>;
- hpd-gpio = <&gpx2 6 0>;
+ hpd-gpios = <&gpx2 6 0>;
ports {
port@0 {
Anyway I'm going to send the v6 series, thanks for your good idea.
- Yakir
- Yakir
Also, there is Kconfig recursive dependency that you may want to fix:
$ make exynos_defconfig
drivers/video/fbdev/Kconfig:5:error: recursive dependency detected!
drivers/video/fbdev/Kconfig:5: symbol FB is selected by
DRM_KMS_FB_HELPER
drivers/gpu/drm/Kconfig:34: symbol DRM_KMS_FB_HELPER depends on
DRM_KMS_HELPER
drivers/gpu/drm/Kconfig:28: symbol DRM_KMS_HELPER is selected by
DRM_ANALOGIX_DP
drivers/gpu/drm/bridge/analogix/Kconfig:1: symbol DRM_ANALOGIX_DP
is selected by DRM_EXYNOS_DP
drivers/gpu/drm/exynos/Kconfig:57: symbol DRM_EXYNOS_DP depends on
DRM_EXYNOS_FIMD
drivers/gpu/drm/exynos/Kconfig:19: symbol DRM_EXYNOS_FIMD depends
on FB_S3C
drivers/video/fbdev/Kconfig:2023: symbol FB_S3C depends on FB
Yeah, recursive dependency detected, guess I should remove the
"DRM_KMS_HELPER" from bridge analogix_dp Kconfig file, thanks
for your remind.
--- a/drivers/gpu/drm/bridge/analogix/Kconfig
+++ b/drivers/gpu/drm/bridge/analogix/Kconfig
@@ -1,4 +1,3 @@
config DRM_ANALOGIX_DP
tristate
depends on DRM
- select DRM_KMS_HELPER
That fixes the recursive dependency issue indeed. Thanks.
Thanks,
- Yakir
Best regards,
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/