* [PATCH] bridge: Elaborate a bit on dumb VGA bridges in Kconfig
@ 2018-02-27 10:12 ` Linus Walleij
0 siblings, 0 replies; 4+ messages in thread
From: Linus Walleij @ 2018-02-27 10:12 UTC (permalink / raw)
To: Archit Taneja, Andrzej Hajda, Laurent Pinchart
Cc: linux-arm-kernel, dri-devel
It's better if we explain a bit that this pertains to
passive VGA DAC bridges.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpu/drm/bridge/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 3b99d5a06c16..7cee8f291e7f 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -30,7 +30,8 @@ config DRM_DUMB_VGA_DAC
depends on OF
select DRM_KMS_HELPER
help
- Support for RGB to VGA DAC based bridges
+ Support for passive RGB to VGA DAC based bridges such
+ as ADI ADV7123 or TI THS8134 and THS8135.
config DRM_LVDS_ENCODER
tristate "Transparent parallel to LVDS encoder support"
--
2.14.3
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] bridge: Elaborate a bit on dumb VGA bridges in Kconfig
@ 2018-02-27 10:12 ` Linus Walleij
0 siblings, 0 replies; 4+ messages in thread
From: Linus Walleij @ 2018-02-27 10:12 UTC (permalink / raw)
To: linux-arm-kernel
It's better if we explain a bit that this pertains to
passive VGA DAC bridges.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpu/drm/bridge/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 3b99d5a06c16..7cee8f291e7f 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -30,7 +30,8 @@ config DRM_DUMB_VGA_DAC
depends on OF
select DRM_KMS_HELPER
help
- Support for RGB to VGA DAC based bridges
+ Support for passive RGB to VGA DAC based bridges such
+ as ADI ADV7123 or TI THS8134 and THS8135.
config DRM_LVDS_ENCODER
tristate "Transparent parallel to LVDS encoder support"
--
2.14.3
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] bridge: Elaborate a bit on dumb VGA bridges in Kconfig
2018-02-27 10:12 ` Linus Walleij
@ 2018-02-27 10:29 ` Laurent Pinchart
-1 siblings, 0 replies; 4+ messages in thread
From: Laurent Pinchart @ 2018-02-27 10:29 UTC (permalink / raw)
To: Linus Walleij; +Cc: linux-arm-kernel, dri-devel
Hi Linus,
Thank you for the patch.
On Tuesday, 27 February 2018 12:12:00 EET Linus Walleij wrote:
> It's better if we explain a bit that this pertains to
> passive VGA DAC bridges.
>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> drivers/gpu/drm/bridge/Kconfig | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index 3b99d5a06c16..7cee8f291e7f 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -30,7 +30,8 @@ config DRM_DUMB_VGA_DAC
> depends on OF
> select DRM_KMS_HELPER
> help
> - Support for RGB to VGA DAC based bridges
> + Support for passive RGB to VGA DAC based bridges such
> + as ADI ADV7123 or TI THS8134 and THS8135.
Strictly speaking none of those components are passive: https://
en.wikipedia.org/wiki/Electronic_component#Passive_components. Only the VGA
DACs based on resistor ladders (such as the one Maxime initially developed
this driver for, see https://en.wikipedia.org/wiki/Resistor_ladder#R
%E2%80%932R_resistor_ladder_network_(digital_to_analog_conversion)) can be
considered passive devices.
> config DRM_LVDS_ENCODER
> tristate "Transparent parallel to LVDS encoder support"
--
Regards,
Laurent Pinchart
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] bridge: Elaborate a bit on dumb VGA bridges in Kconfig
@ 2018-02-27 10:29 ` Laurent Pinchart
0 siblings, 0 replies; 4+ messages in thread
From: Laurent Pinchart @ 2018-02-27 10:29 UTC (permalink / raw)
To: linux-arm-kernel
Hi Linus,
Thank you for the patch.
On Tuesday, 27 February 2018 12:12:00 EET Linus Walleij wrote:
> It's better if we explain a bit that this pertains to
> passive VGA DAC bridges.
>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> drivers/gpu/drm/bridge/Kconfig | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index 3b99d5a06c16..7cee8f291e7f 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -30,7 +30,8 @@ config DRM_DUMB_VGA_DAC
> depends on OF
> select DRM_KMS_HELPER
> help
> - Support for RGB to VGA DAC based bridges
> + Support for passive RGB to VGA DAC based bridges such
> + as ADI ADV7123 or TI THS8134 and THS8135.
Strictly speaking none of those components are passive: https://
en.wikipedia.org/wiki/Electronic_component#Passive_components. Only the VGA
DACs based on resistor ladders (such as the one Maxime initially developed
this driver for, see https://en.wikipedia.org/wiki/Resistor_ladder#R
%E2%80%932R_resistor_ladder_network_(digital_to_analog_conversion)) can be
considered passive devices.
> config DRM_LVDS_ENCODER
> tristate "Transparent parallel to LVDS encoder support"
--
Regards,
Laurent Pinchart
^ permalink raw reply [flat|nested] 4+ messages in thread
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2018-02-27 10:12 [PATCH] bridge: Elaborate a bit on dumb VGA bridges in Kconfig Linus Walleij
2018-02-27 10:12 ` Linus Walleij
2018-02-27 10:29 ` Laurent Pinchart
2018-02-27 10:29 ` Laurent Pinchart
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