Subject: Re: [Letux-kernel] [PATCH] ARM: omap2plus_defconfig: Fix selected panels after generic panel changes

From: Andreas Kemnade <[email-masked]>
Date: Sun, 6 Oct 2019 22:39:58 +0200

On Sun, 6 Oct 2019 17:53:48 +0300
Laurent Pinchart <[email-masked]> wrote:

> Hi Nikolaus,
> 
> On Sat, Oct 05, 2019 at 12:50:37PM +0200, H. Nikolaus Schaller wrote:
> > > Am 04.10.2019 um 10:41 schrieb Tomi Valkeinen <[email-masked]>:
> > > 
> > > On 03/10/2019 19:55, Tony Lindgren wrote:  
> > >> The old omapdrm panels got removed for v5.4 in favor of generic panels,
> > >> and the Kconfig options changed. Let's update omap2plus_defconfig
> > >> accordingly so the same panels are still enabled.
> > >> Cc: Jyri Sarha <[email-masked]>
> > >> Cc: Laurent Pinchart <[email-masked]>
> > >> Cc: Tomi Valkeinen <[email-masked]>
> > >> Signed-off-by: Tony Lindgren <[email-masked]>
> > >> ---
> > >>  arch/arm/configs/omap2plus_defconfig | 12 ++++++------
> > >>  1 file changed, 6 insertions(+), 6 deletions(-)
> > >> diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
> > >> --- a/arch/arm/configs/omap2plus_defconfig
> > >> +++ b/arch/arm/configs/omap2plus_defconfig
> > >> @@ -356,14 +356,14 @@ CONFIG_DRM_OMAP_CONNECTOR_HDMI=m
> > >>  CONFIG_DRM_OMAP_CONNECTOR_ANALOG_TV=m
> > >>  CONFIG_DRM_OMAP_PANEL_DPI=m
> > >>  CONFIG_DRM_OMAP_PANEL_DSI_CM=m
> > >> -CONFIG_DRM_OMAP_PANEL_SONY_ACX565AKM=m
> > >> -CONFIG_DRM_OMAP_PANEL_LGPHILIPS_LB035Q02=m
> > >> -CONFIG_DRM_OMAP_PANEL_SHARP_LS037V7DW01=m
> > >> -CONFIG_DRM_OMAP_PANEL_TPO_TD028TTEC1=m
> > >> -CONFIG_DRM_OMAP_PANEL_TPO_TD043MTEA1=m
> > >> -CONFIG_DRM_OMAP_PANEL_NEC_NL8048HL11=m
> > >>  CONFIG_DRM_TILCDC=m
> > >>  CONFIG_DRM_PANEL_SIMPLE=m
> > >> +CONFIG_DRM_PANEL_LG_LB035Q02=m
> > >> +CONFIG_DRM_PANEL_NEC_NL8048HL11=m
> > >> +CONFIG_DRM_PANEL_SHARP_LS037V7DW01=m
> > >> +CONFIG_DRM_PANEL_SONY_ACX565AKM=m
> > >> +CONFIG_DRM_PANEL_TPO_TD028TTEC1=m
> > >> +CONFIG_DRM_PANEL_TPO_TD043MTEA1=m
> > >>  CONFIG_FB=y
> > >>  CONFIG_FIRMWARE_EDID=y
> > >>  CONFIG_FB_MODE_HELPERS=y  
> > > 
> > > Sorry, I didn't remember to update these. Some additions:
> > > 
> > > These can be dropped, they no longer exist:
> > > 
> > > CONFIG_DRM_OMAP_ENCODER_TFP410=m
> > > CONFIG_DRM_OMAP_CONNECTOR_DVI=m
> > > CONFIG_DRM_OMAP_PANEL_DPI=m  
> > 
> > After being hit by the __always_inline issue [1] I am now
> > back with being able to test v5.4-rc1.
> > 
> > Now this patch fixes the build problem, but we still have
> > one: panel drivers are no longer automatically loaded at
> > boot. We now need to manually modprobe them.
> > 
> > This has been observed with GTA04 (TD028TTEC1) and OpenPandora
> > (TD043MTEA1). So moving the drivers seems to have changed/broken
> > something with DT based driver matching.  
> 
> That's really weird, the driver name, the SPI device table and the OF
> device table are the same (except for the "omapdss," prefix that we
> don't add anymore in omapdss-boot-init.c). Would you be able to
> investigate what broke ?
> 
in earlier times:

root@gta04:/sys/bus/spi/devices/spi4.0# cat modalias 
spi:tpo,td028ttec1

now in 5.4-rc1:
root@gta04:/sys/bus/spi/devices/spi4.0# cat modalias 
spi:td028ttec1

root@gta04:~# modinfo /lib/modules/5.4.0-rc1-letux+/kernel/drivers/gpu/drm/panel/panel-tpo-td028ttec1.ko 
filename:       /lib/modules/5.4.0-rc1-letux+/kernel/drivers/gpu/drm/panel/panel-tpo-td028ttec1.ko
license:        GPL
description:    Toppoly TD028TTEC1 panel driver
author:         H. Nikolaus Schaller <[email-masked]>
srcversion:     6B3E224BCD3D76253CF361C
alias:          of:N*T*Ctoppoly,td028ttec1C*
alias:          of:N*T*Ctoppoly,td028ttec1
alias:          of:N*T*Ctpo,td028ttec1C*
alias:          of:N*T*Ctpo,td028ttec1
alias:          spi:toppoly,td028ttec1
alias:          spi:tpo,td028ttec1
depends:        drm
intree:         Y
name:           panel_tpo_td028ttec1
vermagic:       5.4.0-rc1-letux+ SMP preempt mod_unload ARMv7 p2v8 

That alias is not in the list.

Regards,
Andreas

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