[PATCH] imx-drm: imx-hdmi: fix hdmi hotplug detection initial state

[Fabio Estevam]

On Mon, Jun 9, 2014 at 5:09 PM, Russell King - ARM Linux
<linux at arm.linux.org.uk> wrote:

> Right, so the problem isn't at the HDMI level, but at the DI level... so
> that's where we need to debug what's being setup.  I left some debugging
> in ipu-di.c - could you try enabling that please?

Booting the kernel with the HDMI cable connected (no image is seen on
HDMI, only on LVDS):

imx-ipuv3 2400000.ipu: DI0 base: 0x02640000 remapped to c08f6000
imx-ipuv3 2400000.ipu: DI1 base: 0x02648000 remapped to c08fe000
imx-ipuv3 2400000.ipu: IPUv3H probed
imx-ipuv3 2800000.ipu: DI0 base: 0x02a40000 remapped to c09b6000
imx-ipuv3 2800000.ipu: DI1 base: 0x02a48000 remapped to c09be000
imx-ipuv3 2800000.ipu: IPUv3H probed
mmcblk0: mmc1:0007 SD4GB 3.70 GiB
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] No driver support for vblank timestamp query.
imx-drm display-subsystem.11: bound imx-ipuv3-crtc.0 (ops ipu_crtc_ops)
imx-drm display-subsystem.11: bound imx-ipuv3-crtc.1 (ops ipu_crtc_ops)
imx-drm display-subsystem.11: bound imx-ipuv3-crtc.2 (ops ipu_crtc_ops)
imx-drm display-subsystem.11: bound imx-ipuv3-crtc.3 (ops ipu_crtc_ops)
imx-hdmi 120000.hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1
imx-drm display-subsystem.11: bound 120000.hdmi (ops hdmi_ops)
imx-drm display-subsystem.11: bound ldb.10 (ops imx_ldb_ops)
 mmcblk0: unknown partition table
imx-ipuv3 2400000.ipu: disp 0: panel size = 1920 x 1080
imx-ipuv3 2400000.ipu: Clocks: IPU 264000000Hz DI 24000000Hz Needed 138500000Hz
imx-ipuv3 2400000.ipu:   IPU clock can give 132000000 with divider 2,
error -4.3%
imx-ipuv3 2400000.ipu: Want 138500000Hz IPU 264000000Hz DI 138500000Hz
using DI, 138500000Hz
imx-ipuv3 2400000.ipu: disp 1: panel size = 1024 x 768
imx-ipuv3 2400000.ipu: Clocks: IPU 264000000Hz DI 64999999Hz Needed 65000000Hz
imx-ipuv3 2400000.ipu: Want 65000000Hz IPU 264000000Hz DI 64999999Hz
using DI, 64999999Hz

After cable removal:
root at freescale /$ imx-ipuv3 2400000.ipu: disp 0: panel size = 1024 x 768
imx-ipuv3 2400000.ipu: Clocks: IPU 264000000Hz DI 64999999Hz Needed 65000000Hz
imx-ipuv3 2400000.ipu: Want 65000000Hz IPU 264000000Hz DI 64999999Hz
using DI, 64999999Hz

After cable re-insertion (image is seen on both HDMI and LVDS):

imx-ipuv3 2400000.ipu: disp 0: panel size = 1920 x 1080
imx-ipuv3 2400000.ipu: Clocks: IPU 264000000Hz DI 64999999Hz Needed 138500000Hz
imx-ipuv3 2400000.ipu:   IPU clock can give 132000000 with divider 2,
error -4.3%
imx-ipuv3 2400000.ipu: Want 138500000Hz IPU 264000000Hz DI 129999997Hz
using DI, 129999997Hz
imx-ipuv3 2400000.ipu: disp 1: panel size = 1024 x 768
imx-ipuv3 2400000.ipu: Clocks: IPU 264000000Hz DI 64999999Hz Needed 65000000Hz
imx-ipuv3 2400000.ipu: Want 65000000Hz IPU 264000000Hz DI 64999999Hz
using DI, 64999999Hz