From: Arnd Bergmann <arnd@arndb.de>

The new driver needs the dsc helper code to be available:

x86_64-linux-ld: vmlinux.o: in function `s6e3ha8_amb577px01_wqhd_prepare':
panel-samsung-s6e3ha8.c:(.text+0x16b1e65): undefined reference to `drm_dsc_pps_payload_pack'

Select it from Kconfig as we do for other similar drivers.

Fixes: 779679d3c164 ("drm/panel: Add support for S6E3HA8 panel driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/panel/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index ddfaa99ea9dd..ffe7eff71496 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -626,6 +626,7 @@ config DRM_PANEL_SAMSUNG_AMS639RQ08
 config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01
 	tristate "Samsung AMS452EF01 panel with S6E88A0 DSI video mode controller"
 	depends on OF
+	select DRM_DISPLAY_DSC_HELPER
 	select DRM_MIPI_DSI
 	select VIDEOMODE_HELPERS
 
-- 
2.39.5

On 2024/10/15 15:30, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The new driver needs the dsc helper code to be available:
> 
> x86_64-linux-ld: vmlinux.o: in function `s6e3ha8_amb577px01_wqhd_prepare':
> panel-samsung-s6e3ha8.c:(.text+0x16b1e65): undefined reference to `drm_dsc_pps_payload_pack'
> 
> Select it from Kconfig as we do for other similar drivers.
> 
> Fixes: 779679d3c164 ("drm/panel: Add support for S6E3HA8 panel driver")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/gpu/drm/panel/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index ddfaa99ea9dd..ffe7eff71496 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -626,6 +626,7 @@ config DRM_PANEL_SAMSUNG_AMS639RQ08
>  config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01
>  	tristate "Samsung AMS452EF01 panel with S6E88A0 DSI video mode controller"
>  	depends on OF
> +	select DRM_DISPLAY_DSC_HELPER

It seems that it uses DRM_DISPLAY_DP_HELPER in mainline but use
DRM_DISPLAY_DSC_HELPER in next.

>  	select DRM_MIPI_DSI
>  	select VIDEOMODE_HELPERS
>

On Tue, Oct 15, 2024, at 07:52, Jinjie Ruan wrote:
> On 2024/10/15 15:30, Arnd Bergmann wrote:
>> From: Arnd Bergmann <arnd@arndb.de>
>> 
>> The new driver needs the dsc helper code to be available:
>> 
>> x86_64-linux-ld: vmlinux.o: in function `s6e3ha8_amb577px01_wqhd_prepare':
>> panel-samsung-s6e3ha8.c:(.text+0x16b1e65): undefined reference to `drm_dsc_pps_payload_pack'
>> 
>> Select it from Kconfig as we do for other similar drivers.
>> 
>> Fixes: 779679d3c164 ("drm/panel: Add support for S6E3HA8 panel driver")
>> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
>> ---
>>  drivers/gpu/drm/panel/Kconfig | 1 +
>>  1 file changed, 1 insertion(+)
>> 
>> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
>> index ddfaa99ea9dd..ffe7eff71496 100644
>> --- a/drivers/gpu/drm/panel/Kconfig
>> +++ b/drivers/gpu/drm/panel/Kconfig
>> @@ -626,6 +626,7 @@ config DRM_PANEL_SAMSUNG_AMS639RQ08
>>  config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01
>>  	tristate "Samsung AMS452EF01 panel with S6E88A0 DSI video mode controller"
>>  	depends on OF
>> +	select DRM_DISPLAY_DSC_HELPER
>
> It seems that it uses DRM_DISPLAY_DP_HELPER in mainline but use
> DRM_DISPLAY_DSC_HELPER in next.
>

I think I made a mistake during rebasing and ended up having
the 'select' under the wrong Kconfig symbol.

The new driver DRM_PANEL_SAMSUNG_S6E3HA8 was only added in
linux-next and does not exist in mainline yet.

Sending a new version now.

      Arnd