[PATCH v3 0/4] Fixes for omapdrm on OpenPandora and GTA04

[PATCH v3 0/4] Fixes for omapdrm on OpenPandora and GTA04

[H. Nikolaus Schaller]

Changes V3:
* stay compatible with old DTB files which still use "toppoly" (suggested by Tomi Valkeinen)
* replaced MODULE_ALIAS entries by MODULE_DEVICE_TABLE (suggested by Andrew F. Davis)
* removed DSI VDDS patch as it has already been accepted

2017-11-16 09:50:22: Changes V2:
* replaced patch to fix DSI VDDS for OMAP3 by equivalent patch from Laurent Pinchart
* keep previous compatibility option in panel driver to handle older device tree binaries

2017-11-08 22:09:36:
This patch set fixes vendor names of the panels
and fixes a problem on omapdrm with enabling
VDD_DSI for OMAP3 which is needed for displaying
the Red and Green channel on OMAP3530 (Pandora).

H. Nikolaus Schaller (4):
  omapdrm: panel: fix compatible vendor string for td028ttec1
  omapdrm: panel: td028ttec1: replace MODULE_ALIAS by
    MODULE_DEVICE_TABLE
  DTS: GTA04: fix panel compatibility string
  DTS: Pandora: fix panel compatibility string

 .../panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt}    |  4 ++--
 arch/arm/boot/dts/omap3-gta04.dtsi                          |  2 +-
 arch/arm/boot/dts/omap3-pandora-common.dtsi                 |  2 +-
 drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c     | 13 ++++++++++++-
 .../fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c      | 12 +++++++++++-
 5 files changed, 27 insertions(+), 6 deletions(-)
 rename Documentation/devicetree/bindings/display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt} (84%)

-- 
2.12.2

[PATCH v3 1/4] omapdrm: panel: fix compatible vendor string for td028ttec1

[H. Nikolaus Schaller]

The vendor name was "toppoly" but other panels and the vendor list
have defined it as "tpo". So let's fix it in driver and bindings.

We keep the old definition in parallel to stay compatible with
potential older DTB setup.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
---
 .../display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt}      | 4 ++--
 drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c               | 3 +++
 drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c      | 3 +++
 3 files changed, 8 insertions(+), 2 deletions(-)
 rename Documentation/devicetree/bindings/display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt} (84%)

diff --git a/Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt b/Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
similarity index 84%
rename from Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt
rename to Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
index 7175dc3740ac..ed34253d9fb1 100644
--- a/Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt
+++ b/Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
@@ -2,7 +2,7 @@ Toppoly TD028TTEC1 Panel
 ========================
 
 Required properties:
-- compatible: "toppoly,td028ttec1"
+- compatible: "tpo,td028ttec1"
 
 Optional properties:
 - label: a symbolic name for the panel
@@ -14,7 +14,7 @@ Example
 -------
 
 lcd-panel: td028ttec1@0 {
-	compatible = "toppoly,td028ttec1";
+	compatible = "tpo,td028ttec1";
 	reg = <0>;
 	spi-max-frequency = <100000>;
 	spi-cpol;
diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
index 0a38a0e8c925..a0dfa14f4fab 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
@@ -452,6 +452,8 @@ static int td028ttec1_panel_remove(struct spi_device *spi)
 }
 
 static const struct of_device_id td028ttec1_of_match[] = {
+	{ .compatible = "omapdss,tpo,td028ttec1", },
+	/* keep to not break older DTB */
 	{ .compatible = "omapdss,toppoly,td028ttec1", },
 	{},
 };
@@ -471,6 +473,7 @@ static struct spi_driver td028ttec1_spi_driver = {
 
 module_spi_driver(td028ttec1_spi_driver);
 
+MODULE_ALIAS("spi:tpo,td028ttec1");
 MODULE_ALIAS("spi:toppoly,td028ttec1");
 MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
 MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c
index 57e9e146ff74..4aeb908f2d1e 100644
--- a/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c
+++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c
@@ -455,6 +455,8 @@ static int td028ttec1_panel_remove(struct spi_device *spi)
 }
 
 static const struct of_device_id td028ttec1_of_match[] = {
+	{ .compatible = "omapdss,tpo,td028ttec1", },
+	/* keep to not break older DTB */
 	{ .compatible = "omapdss,toppoly,td028ttec1", },
 	{},
 };
@@ -474,6 +476,7 @@ static struct spi_driver td028ttec1_spi_driver = {
 
 module_spi_driver(td028ttec1_spi_driver);
 
+MODULE_ALIAS("spi:tpo,td028ttec1");
 MODULE_ALIAS("spi:toppoly,td028ttec1");
 MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
 MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
-- 
2.12.2

Re: [PATCH v3 1/4] omapdrm: panel: fix compatible vendor string for td028ttec1

[Rob Herring]

On Tue, Nov 28, 2017 at 04:48:54PM +0100, H. Nikolaus Schaller wrote:
> The vendor name was "toppoly" but other panels and the vendor list
> have defined it as "tpo". So let's fix it in driver and bindings.
> 
> We keep the old definition in parallel to stay compatible with
> potential older DTB setup.
> 
> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
> ---
>  .../display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt}      | 4 ++--
>  drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c               | 3 +++
>  drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c      | 3 +++
>  3 files changed, 8 insertions(+), 2 deletions(-)
>  rename Documentation/devicetree/bindings/display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt} (84%)
> 
> diff --git a/Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt b/Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
> similarity index 84%
> rename from Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt
> rename to Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
> index 7175dc3740ac..ed34253d9fb1 100644
> --- a/Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt
> +++ b/Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
> @@ -2,7 +2,7 @@ Toppoly TD028TTEC1 Panel
>  ========================
>  
>  Required properties:
> -- compatible: "toppoly,td028ttec1"
> +- compatible: "tpo,td028ttec1"
>  
>  Optional properties:
>  - label: a symbolic name for the panel
> @@ -14,7 +14,7 @@ Example
>  -------
>  
>  lcd-panel: td028ttec1@0 {
> -	compatible = "toppoly,td028ttec1";
> +	compatible = "tpo,td028ttec1";
>  	reg = <0>;
>  	spi-max-frequency = <100000>;
>  	spi-cpol;
> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
> index 0a38a0e8c925..a0dfa14f4fab 100644
> --- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
> +++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
> @@ -452,6 +452,8 @@ static int td028ttec1_panel_remove(struct spi_device *spi)
>  }
>  
>  static const struct of_device_id td028ttec1_of_match[] = {
> +	{ .compatible = "omapdss,tpo,td028ttec1", },

Why the omapdss part?

Re: [PATCH v3 1/4] omapdrm: panel: fix compatible vendor string for td028ttec1

[H. Nikolaus Schaller]

> Am 01.12.2017 um 02:57 schrieb Rob Herring <robh@kernel.org>:
> 
> On Tue, Nov 28, 2017 at 04:48:54PM +0100, H. Nikolaus Schaller wrote:
>> The vendor name was "toppoly" but other panels and the vendor list
>> have defined it as "tpo". So let's fix it in driver and bindings.
>> 
>> We keep the old definition in parallel to stay compatible with
>> potential older DTB setup.
>> 
>> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
>> ---
>> .../display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt}      | 4 ++--
>> drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c               | 3 +++
>> drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c      | 3 +++
>> 3 files changed, 8 insertions(+), 2 deletions(-)
>> rename Documentation/devicetree/bindings/display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt} (84%)
>> 
>> diff --git a/Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt b/Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
>> similarity index 84%
>> rename from Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt
>> rename to Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
>> index 7175dc3740ac..ed34253d9fb1 100644
>> --- a/Documentation/devicetree/bindings/display/panel/toppoly,td028ttec1.txt
>> +++ b/Documentation/devicetree/bindings/display/panel/tpo,td028ttec1.txt
>> @@ -2,7 +2,7 @@ Toppoly TD028TTEC1 Panel
>> ========================
>> 
>> Required properties:
>> -- compatible: "toppoly,td028ttec1"
>> +- compatible: "tpo,td028ttec1"
>> 
>> Optional properties:
>> - label: a symbolic name for the panel
>> @@ -14,7 +14,7 @@ Example
>> -------
>> 
>> lcd-panel: td028ttec1@0 {
>> -	compatible = "toppoly,td028ttec1";
>> +	compatible = "tpo,td028ttec1";
>> 	reg = <0>;
>> 	spi-max-frequency = <100000>;
>> 	spi-cpol;
>> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
>> index 0a38a0e8c925..a0dfa14f4fab 100644
>> --- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
>> +++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
>> @@ -452,6 +452,8 @@ static int td028ttec1_panel_remove(struct spi_device *spi)
>> }
>> 
>> static const struct of_device_id td028ttec1_of_match[] = {
>> +	{ .compatible = "omapdss,tpo,td028ttec1", },
> 
> Why the omapdss part?

I think because they are (currently and still) omapdrm
(omapdss) specific since SoC specific drivers for the
same panel may exist in parallel.

All panel drivers in drivers/gpu/drm/omapdrm/displays
have and need this prefix.

As far as I understand, the omapdss driver takes the
DTS compatible string, adds "omapdss," and then looks for
a panel driver to probe.

See also: Sebastian Reichel's comment to "[PATCH v3 4/4] DTS: Pandora: fix panel compatibility string"

BR,
Nikolaus Schaller

Re: [PATCH v3 1/4] omapdrm: panel: fix compatible vendor string for td028ttec1

[Tomi Valkeinen]

On 01/12/17 03:57, Rob Herring wrote:

>> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
>> index 0a38a0e8c925..a0dfa14f4fab 100644
>> --- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
>> +++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
>> @@ -452,6 +452,8 @@ static int td028ttec1_panel_remove(struct spi_device *spi)
>>  }
>>  
>>  static const struct of_device_id td028ttec1_of_match[] = {
>> +	{ .compatible = "omapdss,tpo,td028ttec1", },
> 
> Why the omapdss part?

This driver is omapdrm specific. But I don't want the dts file to have
omapdrm specific compatible strings, so that the dts files do not have
to be changed when in the future we move to common DRM panel drivers

So:

- In the .dts, we have compatible = "tpo,td028ttec1"
- At early boot time, we append "omapdss," to compatible strings for
panels connected to the DSS node.
- The omapdrm specific drivers match to "omapdss,tpo,td028ttec1"

 Tomi

-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

[PATCH v3 2/4] omapdrm: panel: td028ttec1: replace MODULE_ALIAS by MODULE_DEVICE_TABLE

[H. Nikolaus Schaller]

to make it easier to keep in sync with the OF device table.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
---
 drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c      | 12 ++++++++++--
 .../video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c | 11 +++++++++--
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
index a0dfa14f4fab..2721a86ac5e7 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c
@@ -460,9 +460,19 @@ static const struct of_device_id td028ttec1_of_match[] = {
 
 MODULE_DEVICE_TABLE(of, td028ttec1_of_match);
 
+static const struct spi_device_id td028ttec1_ids[] = {
+	{ "toppoly,td028ttec1", 0 },
+	{ "tpo,td028ttec1", 0},
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(spi, td028ttec1_ids);
+
+
 static struct spi_driver td028ttec1_spi_driver = {
 	.probe		= td028ttec1_panel_probe,
 	.remove		= td028ttec1_panel_remove,
+	.id_table	= td028ttec1_ids,
 
 	.driver         = {
 		.name   = "panel-tpo-td028ttec1",
@@ -473,8 +483,6 @@ static struct spi_driver td028ttec1_spi_driver = {
 
 module_spi_driver(td028ttec1_spi_driver);
 
-MODULE_ALIAS("spi:tpo,td028ttec1");
-MODULE_ALIAS("spi:toppoly,td028ttec1");
 MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
 MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c
index 4aeb908f2d1e..f6da8755b859 100644
--- a/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c
+++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c
@@ -463,9 +463,18 @@ static const struct of_device_id td028ttec1_of_match[] = {
 
 MODULE_DEVICE_TABLE(of, td028ttec1_of_match);
 
+static const struct spi_device_id td028ttec1_ids[] = {
+	{ "toppoly,td028ttec1", 0 },
+	{ "tpo,td028ttec1", 0},
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(spi, td028ttec1_ids);
+
 static struct spi_driver td028ttec1_spi_driver = {
 	.probe		= td028ttec1_panel_probe,
 	.remove		= td028ttec1_panel_remove,
+	.id_table	= td028ttec1_ids,
 
 	.driver         = {
 		.name   = "panel-tpo-td028ttec1",
@@ -476,8 +485,6 @@ static struct spi_driver td028ttec1_spi_driver = {
 
 module_spi_driver(td028ttec1_spi_driver);
 
-MODULE_ALIAS("spi:tpo,td028ttec1");
-MODULE_ALIAS("spi:toppoly,td028ttec1");
 MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
 MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
 MODULE_LICENSE("GPL");
-- 
2.12.2

[PATCH v3 3/4] DTS: GTA04: fix panel compatibility string

[H. Nikolaus Schaller]

Official vendor string is now "tpo" and not "toppoly".

Requires patch "omapdrm: panel: fix compatible vendor string for td028ttec1"

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
---
 arch/arm/boot/dts/omap3-gta04.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/omap3-gta04.dtsi b/arch/arm/boot/dts/omap3-gta04.dtsi
index 4504908c23fe..ec27ed67a22a 100644
--- a/arch/arm/boot/dts/omap3-gta04.dtsi
+++ b/arch/arm/boot/dts/omap3-gta04.dtsi
@@ -86,7 +86,7 @@
 
 		/* lcd panel */
 		lcd: td028ttec1@0 {
-			compatible = "toppoly,td028ttec1";
+			compatible = "tpo,td028ttec1";
 			reg = <0>;
 			spi-max-frequency = <100000>;
 			spi-cpol;
-- 
2.12.2

Re: [PATCH v3 3/4] DTS: GTA04: fix panel compatibility string

[Tony Lindgren]

* H. Nikolaus Schaller <hns@goldelico.com> [171128 15:52]:
> Official vendor string is now "tpo" and not "toppoly".
> 
> Requires patch "omapdrm: panel: fix compatible vendor string for td028ttec1"

This is not a fix then, this is a clean up as you change the compatible
earlier. Please resend this separately once the driver changes have
been merged.

Regards,

Tony

> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
> ---
>  arch/arm/boot/dts/omap3-gta04.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/omap3-gta04.dtsi b/arch/arm/boot/dts/omap3-gta04.dtsi
> index 4504908c23fe..ec27ed67a22a 100644
> --- a/arch/arm/boot/dts/omap3-gta04.dtsi
> +++ b/arch/arm/boot/dts/omap3-gta04.dtsi
> @@ -86,7 +86,7 @@
>  
>  		/* lcd panel */
>  		lcd: td028ttec1@0 {
> -			compatible = "toppoly,td028ttec1";
> +			compatible = "tpo,td028ttec1";
>  			reg = <0>;
>  			spi-max-frequency = <100000>;
>  			spi-cpol;
> -- 
> 2.12.2
> 

[PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[H. Nikolaus Schaller]

We can remove the unnecessary "omapdss," prefix because
the omapdrm driver takes care of it when matching with
the driver table.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
---
 arch/arm/boot/dts/omap3-pandora-common.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/omap3-pandora-common.dtsi b/arch/arm/boot/dts/omap3-pandora-common.dtsi
index 53e007abdc71..64d967ec8c58 100644
--- a/arch/arm/boot/dts/omap3-pandora-common.dtsi
+++ b/arch/arm/boot/dts/omap3-pandora-common.dtsi
@@ -626,7 +626,7 @@
 
 	lcd: lcd@1 {
 		reg = <1>;	/* CS1 */
-		compatible =	"omapdss,tpo,td043mtea1";
+		compatible =	"tpo,td043mtea1";
 		spi-max-frequency = <100000>;
 		spi-cpol;
 		spi-cpha;
-- 
2.12.2

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[Tony Lindgren]

* H. Nikolaus Schaller <hns@goldelico.com> [171128 15:52]:
> We can remove the unnecessary "omapdss," prefix because
> the omapdrm driver takes care of it when matching with
> the driver table.

So is this needed as a fix or is this another clean-up?

So is this is really needed as a fix?

If this is just clean-up, again, please resend once the driver
changes have cleared.

Regards,

Tony

> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
> ---
>  arch/arm/boot/dts/omap3-pandora-common.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/omap3-pandora-common.dtsi b/arch/arm/boot/dts/omap3-pandora-common.dtsi
> index 53e007abdc71..64d967ec8c58 100644
> --- a/arch/arm/boot/dts/omap3-pandora-common.dtsi
> +++ b/arch/arm/boot/dts/omap3-pandora-common.dtsi
> @@ -626,7 +626,7 @@
>  
>  	lcd: lcd@1 {
>  		reg = <1>;	/* CS1 */
> -		compatible =	"omapdss,tpo,td043mtea1";
> +		compatible =	"tpo,td043mtea1";
>  		spi-max-frequency = <100000>;
>  		spi-cpol;
>  		spi-cpha;
> -- 
> 2.12.2
> 

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[H. Nikolaus Schaller]

Hi Tony,

> Am 28.11.2017 um 17:04 schrieb Tony Lindgren <tony@atomide.com>:
> 
> * H. Nikolaus Schaller <hns@goldelico.com> [171128 15:52]:
>> We can remove the unnecessary "omapdss," prefix because
>> the omapdrm driver takes care of it when matching with
>> the driver table.
> 
> So is this needed as a fix or is this another clean-up?
> 
> So is this is really needed as a fix?

Hm. How do you differentiate between "fix" and "cleanup"?
Maybe it is more a wording than a content issue...

For me it is a "fix" because it is semantically wrong to have
a prefix where it is not needed. And "fixing" it changes the
compiler output by 8 bytes.

"Cleanup" would be for me removing whitespace or empty lines
or typos in comments.

> 
> If this is just clean-up, again, please resend once the driver
> changes have cleared.

There is no change to the pandora driver involved here. The Pandora
panel driver is already correct. Just the DTS has some redundant
content which should be removed.

So there is no dependency for this patch.

BR,
Nikolaus

> 
> Regards,
> 
> Tony
> 
>> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
>> ---
>> arch/arm/boot/dts/omap3-pandora-common.dtsi | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/arch/arm/boot/dts/omap3-pandora-common.dtsi b/arch/arm/boot/dts/omap3-pandora-common.dtsi
>> index 53e007abdc71..64d967ec8c58 100644
>> --- a/arch/arm/boot/dts/omap3-pandora-common.dtsi
>> +++ b/arch/arm/boot/dts/omap3-pandora-common.dtsi
>> @@ -626,7 +626,7 @@
>> 
>> 	lcd: lcd@1 {
>> 		reg = <1>;	/* CS1 */
>> -		compatible =	"omapdss,tpo,td043mtea1";
>> +		compatible =	"tpo,td043mtea1";
>> 		spi-max-frequency = <100000>;
>> 		spi-cpol;
>> 		spi-cpha;
>> -- 
>> 2.12.2
>> 

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[Tony Lindgren]

* H. Nikolaus Schaller <hns@goldelico.com> [171128 16:17]:
> Hi Tony,
> 
> > Am 28.11.2017 um 17:04 schrieb Tony Lindgren <tony@atomide.com>:
> > 
> > * H. Nikolaus Schaller <hns@goldelico.com> [171128 15:52]:
> >> We can remove the unnecessary "omapdss," prefix because
> >> the omapdrm driver takes care of it when matching with
> >> the driver table.
> > 
> > So is this needed as a fix or is this another clean-up?
> > 
> > So is this is really needed as a fix?
> 
> Hm. How do you differentiate between "fix" and "cleanup"?
> Maybe it is more a wording than a content issue...
> 
> For me it is a "fix" because it is semantically wrong to have
> a prefix where it is not needed. And "fixing" it changes the
> compiler output by 8 bytes.

How about let's call it a "typo fix" then? :)

> "Cleanup" would be for me removing whitespace or empty lines
> or typos in comments.
>
> > If this is just clean-up, again, please resend once the driver
> > changes have cleared.
> 
> There is no change to the pandora driver involved here. The Pandora
> panel driver is already correct. Just the DTS has some redundant
> content which should be removed.
> 
> So there is no dependency for this patch.

OK please resend separately after the driver changes have merged
then.

Regards,

Tony

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[Tony Lindgren]

* H. Nikolaus Schaller <hns@goldelico.com> [171128 18:35]:
> Hi,
> 
> > Am 28.11.2017 um 17:18 schrieb Tony Lindgren <tony@atomide.com>:
> > 
> > * H. Nikolaus Schaller <hns@goldelico.com> [171128 16:17]:
> >> Hi Tony,
> >> 
> >>> Am 28.11.2017 um 17:04 schrieb Tony Lindgren <tony@atomide.com>:
> >>> 
> >>> * H. Nikolaus Schaller <hns@goldelico.com> [171128 15:52]:
> >>>> We can remove the unnecessary "omapdss," prefix because
> >>>> the omapdrm driver takes care of it when matching with
> >>>> the driver table.
> >>> 
> >>> So is this needed as a fix or is this another clean-up?
> >>> 
> >>> So is this is really needed as a fix?
> >> 
> >> Hm. How do you differentiate between "fix" and "cleanup"?
> >> Maybe it is more a wording than a content issue...
> >> 
> >> For me it is a "fix" because it is semantically wrong to have
> >> a prefix where it is not needed. And "fixing" it changes the
> >> compiler output by 8 bytes.
> > 
> > How about let's call it a "typo fix" then? :)
> 
> Well, it is not really a typo.

Well what if the stable people pick it into earlier stable series
based on the word fix in the subject? That has happened before.

I suggest you update the dts patches to use wording like
"update compatible to use new naming" or something similar.

Regards,

Tony

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[Sebastian Reichel]

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Hi,

On Thu, Nov 30, 2017 at 07:24:30AM -0800, Tony Lindgren wrote:
> * H. Nikolaus Schaller <hns@goldelico.com> [171128 18:35]:
> > Hi,
> > 
> > > Am 28.11.2017 um 17:18 schrieb Tony Lindgren <tony@atomide.com>:
> > > 
> > > * H. Nikolaus Schaller <hns@goldelico.com> [171128 16:17]:
> > >> Hi Tony,
> > >> 
> > >>> Am 28.11.2017 um 17:04 schrieb Tony Lindgren <tony@atomide.com>:
> > >>> 
> > >>> * H. Nikolaus Schaller <hns@goldelico.com> [171128 15:52]:
> > >>>> We can remove the unnecessary "omapdss," prefix because
> > >>>> the omapdrm driver takes care of it when matching with
> > >>>> the driver table.
> > >>> 
> > >>> So is this needed as a fix or is this another clean-up?
> > >>> 
> > >>> So is this is really needed as a fix?
> > >> 
> > >> Hm. How do you differentiate between "fix" and "cleanup"?
> > >> Maybe it is more a wording than a content issue...
> > >> 
> > >> For me it is a "fix" because it is semantically wrong to have
> > >> a prefix where it is not needed. And "fixing" it changes the
> > >> compiler output by 8 bytes.
> > > 
> > > How about let's call it a "typo fix" then? :)
> > 
> > Well, it is not really a typo.
> 
> Well what if the stable people pick it into earlier stable series
> based on the word fix in the subject? That has happened before.
> 
> I suggest you update the dts patches to use wording like
> "update compatible to use new naming" or something similar.

Patch 4/4 is a Fix and should be applied to stable trees. "omapdss,"
prefix was never supposed to be in the DTS files, is not supposed to
be in there now and will break some time in the future.

Explanation: The early init of omapdss adds the prefix at runtime,
so that the binding can use generic properties and the kernel can
use omapdss specific drivers until the generic ones can be used.

-- Sebastian

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Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[Tomi Valkeinen]

On 01/12/17 00:06, Sebastian Reichel wrote:

>>>> How about let's call it a "typo fix" then? :)
>>>
>>> Well, it is not really a typo.
>>
>> Well what if the stable people pick it into earlier stable series
>> based on the word fix in the subject? That has happened before.
>>
>> I suggest you update the dts patches to use wording like
>> "update compatible to use new naming" or something similar.
> 
> Patch 4/4 is a Fix and should be applied to stable trees. "omapdss,"
> prefix was never supposed to be in the DTS files, is not supposed to
> be in there now and will break some time in the future.
> 
> Explanation: The early init of omapdss adds the prefix at runtime,
> so that the binding can use generic properties and the kernel can
> use omapdss specific drivers until the generic ones can be used

This is true, but the extra "omapdss" does not cause any issues at the
moment, and the time when it causes issues is still many kernel versions
in the future.

But, yes, thinking about this, I agree, it's better to pick this one
separately as a fix (after rebasing it on top of current maineline so
that it doesn't depend on the toppoly name change), and leaving the
toppoly->tpo change as a cleanup.

-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[H. Nikolaus Schaller]

Hi Tomi,

> Am 01.12.2017 um 09:13 schrieb Tomi Valkeinen <tomi.valkeinen@ti.com>:
> 
> On 01/12/17 00:06, Sebastian Reichel wrote:
> 
>>>>> How about let's call it a "typo fix" then? :)
>>>> 
>>>> Well, it is not really a typo.
>>> 
>>> Well what if the stable people pick it into earlier stable series
>>> based on the word fix in the subject? That has happened before.
>>> 
>>> I suggest you update the dts patches to use wording like
>>> "update compatible to use new naming" or something similar.
>> 
>> Patch 4/4 is a Fix and should be applied to stable trees. "omapdss,"
>> prefix was never supposed to be in the DTS files, is not supposed to
>> be in there now and will break some time in the future.
>> 
>> Explanation: The early init of omapdss adds the prefix at runtime,
>> so that the binding can use generic properties and the kernel can
>> use omapdss specific drivers until the generic ones can be used
> 
> This is true, but the extra "omapdss" does not cause any issues at the
> moment, and the time when it causes issues is still many kernel versions
> in the future.
> 
> But, yes, thinking about this, I agree, it's better to pick this one
> separately as a fix (after rebasing it on top of current maineline so
> that it doesn't depend on the toppoly name change), and leaving the
> toppoly->tpo change as a cleanup.

Just a note: there is no toppoly->tpo change for *this* panel and
Pandora board. Just omapdss removal.

The GTA04 needs a toppoly->tpo change but no omapdss, removal.

So they solve different problems and are independent of each other.

GTA04: change vendor string
Pandora: remove omapdss, prefix

BR and thanks,
Nikolaus

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[Tomi Valkeinen]

On 01/12/17 11:48, H. Nikolaus Schaller wrote:

> Just a note: there is no toppoly->tpo change for *this* panel and
> Pandora board. Just omapdss removal.
> 
> The GTA04 needs a toppoly->tpo change but no omapdss, removal.
> 
> So they solve different problems and are independent of each other.
> 
> GTA04: change vendor string
> Pandora: remove omapdss, prefix

Oh, right, I totally missed that. I thought they were changes to the
same file...

In that case, Tony, can you pick this one as a fix? I'll pick the
toppoly->tpo patch and merge via drm tree, if you give the ack.

For this:

Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

 Tomi

-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[Tony Lindgren]

* Tomi Valkeinen <tomi.valkeinen@ti.com> [171201 02:03]:
> On 01/12/17 11:48, H. Nikolaus Schaller wrote:
> 
> > Just a note: there is no toppoly->tpo change for *this* panel and
> > Pandora board. Just omapdss removal.
> > 
> > The GTA04 needs a toppoly->tpo change but no omapdss, removal.
> > 
> > So they solve different problems and are independent of each other.
> > 
> > GTA04: change vendor string
> > Pandora: remove omapdss, prefix
> 
> Oh, right, I totally missed that. I thought they were changes to the
> same file...
> 
> In that case, Tony, can you pick this one as a fix? I'll pick the
> toppoly->tpo patch and merge via drm tree, if you give the ack.
> 
> For this:
> 
> Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Sorry I've lost track of this thread and what if anything is really
needed as a fix for v4.16. And now there's newer version of the two
dts patches in thread "[PATCH v4 0/2] Fixes for omapdrm on
OpenPandora and GTA04" so let's move the discussion there.

Regards,

Tony

Re: [PATCH v3 4/4] DTS: Pandora: fix panel compatibility string

[H. Nikolaus Schaller]

> Am 30.11.2017 um 16:24 schrieb Tony Lindgren <tony@atomide.com>:
> 
> * H. Nikolaus Schaller <hns@goldelico.com> [171128 18:35]:
>> Hi,
>> 
>>> Am 28.11.2017 um 17:18 schrieb Tony Lindgren <tony@atomide.com>:
>>> 
>>> * H. Nikolaus Schaller <hns@goldelico.com> [171128 16:17]:
>>>> Hi Tony,
>>>> 
>>>>> Am 28.11.2017 um 17:04 schrieb Tony Lindgren <tony@atomide.com>:
>>>>> 
>>>>> * H. Nikolaus Schaller <hns@goldelico.com> [171128 15:52]:
>>>>>> We can remove the unnecessary "omapdss," prefix because
>>>>>> the omapdrm driver takes care of it when matching with
>>>>>> the driver table.
>>>>> 
>>>>> So is this needed as a fix or is this another clean-up?
>>>>> 
>>>>> So is this is really needed as a fix?
>>>> 
>>>> Hm. How do you differentiate between "fix" and "cleanup"?
>>>> Maybe it is more a wording than a content issue...
>>>> 
>>>> For me it is a "fix" because it is semantically wrong to have
>>>> a prefix where it is not needed. And "fixing" it changes the
>>>> compiler output by 8 bytes.
>>> 
>>> How about let's call it a "typo fix" then? :)
>> 
>> Well, it is not really a typo.
> 
> Well what if the stable people pick it into earlier stable series
> based on the word fix in the subject? That has happened before.

Well, that may happen but IMHO *every* such backport must be checked
for reasonability and compatibility and sometimes even modified to apply.

And I think the author of the original patch receives a notification
from the stable maintainers and can then veto.

For Example I received "[PATCH 4.7 118/186] w1:omap_hdq: fix regression"
"4.7-stable review patch.  If anyone has any objections, please let me know."

If that process still fails, we simply have to revert it... Has also
happened before. So it will not be end of mankind :)

> 
> I suggest you update the dts patches to use wording like
> "update compatible to use new naming" or something similar.

I have applied s/fix/improve/ for patch 3/4 and left 4/4 as
suggested by Sebastian since it is really a strongly suggested
correction.

Since Tomi has already accepted the underlaying driver patch,
[PATCH v4] will only have the remaining DTS patches.

BR and thanks,
Nikolaus

Re: [PATCH v3 0/4] Fixes for omapdrm on OpenPandora and GTA04

[Tomi Valkeinen]

On 28/11/17 17:48, H. Nikolaus Schaller wrote:
> Changes V3:
> * stay compatible with old DTB files which still use "toppoly" (suggested by Tomi Valkeinen)
> * replaced MODULE_ALIAS entries by MODULE_DEVICE_TABLE (suggested by Andrew F. Davis)
> * removed DSI VDDS patch as it has already been accepted
> 
> 2017-11-16 09:50:22: Changes V2:
> * replaced patch to fix DSI VDDS for OMAP3 by equivalent patch from Laurent Pinchart
> * keep previous compatibility option in panel driver to handle older device tree binaries
> 
> 2017-11-08 22:09:36:
> This patch set fixes vendor names of the panels
> and fixes a problem on omapdrm with enabling
> VDD_DSI for OMAP3 which is needed for displaying
> the Red and Green channel on OMAP3530 (Pandora).
> 
> H. Nikolaus Schaller (4):
>   omapdrm: panel: fix compatible vendor string for td028ttec1
>   omapdrm: panel: td028ttec1: replace MODULE_ALIAS by
>     MODULE_DEVICE_TABLE
>   DTS: GTA04: fix panel compatibility string
>   DTS: Pandora: fix panel compatibility string
> 
>  .../panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt}    |  4 ++--
>  arch/arm/boot/dts/omap3-gta04.dtsi                          |  2 +-
>  arch/arm/boot/dts/omap3-pandora-common.dtsi                 |  2 +-
>  drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c     | 13 ++++++++++++-
>  .../fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c      | 12 +++++++++++-
>  5 files changed, 27 insertions(+), 6 deletions(-)
>  rename Documentation/devicetree/bindings/display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt} (84%)
> 

Thanks. I have picked up patches 1 and 2.

3 can be applied when 1 & 2 are in. The change in 4 could be applied
independently, but it conflicts with 3.

Tony, how do you want to handle 3 and 4? I will push 1 and 2 to v4.16. I
don't think they are real issues, so I don't see a reason to push them
as fixes to v4.15. I think they are mostly just cleanups, and we might
as well wait until v4.17, but that's quite far away...

 Tomi

-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

Re: [PATCH v3 0/4] Fixes for omapdrm on OpenPandora and GTA04

[Tony Lindgren]

* Tomi Valkeinen <tomi.valkeinen@ti.com> [171130 10:56]:
> On 28/11/17 17:48, H. Nikolaus Schaller wrote:
> > Changes V3:
> > * stay compatible with old DTB files which still use "toppoly" (suggested by Tomi Valkeinen)
> > * replaced MODULE_ALIAS entries by MODULE_DEVICE_TABLE (suggested by Andrew F. Davis)
> > * removed DSI VDDS patch as it has already been accepted
> > 
> > 2017-11-16 09:50:22: Changes V2:
> > * replaced patch to fix DSI VDDS for OMAP3 by equivalent patch from Laurent Pinchart
> > * keep previous compatibility option in panel driver to handle older device tree binaries
> > 
> > 2017-11-08 22:09:36:
> > This patch set fixes vendor names of the panels
> > and fixes a problem on omapdrm with enabling
> > VDD_DSI for OMAP3 which is needed for displaying
> > the Red and Green channel on OMAP3530 (Pandora).
> > 
> > H. Nikolaus Schaller (4):
> >   omapdrm: panel: fix compatible vendor string for td028ttec1
> >   omapdrm: panel: td028ttec1: replace MODULE_ALIAS by
> >     MODULE_DEVICE_TABLE
> >   DTS: GTA04: fix panel compatibility string
> >   DTS: Pandora: fix panel compatibility string
> > 
> >  .../panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt}    |  4 ++--
> >  arch/arm/boot/dts/omap3-gta04.dtsi                          |  2 +-
> >  arch/arm/boot/dts/omap3-pandora-common.dtsi                 |  2 +-
> >  drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c     | 13 ++++++++++++-
> >  .../fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c      | 12 +++++++++++-
> >  5 files changed, 27 insertions(+), 6 deletions(-)
> >  rename Documentation/devicetree/bindings/display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt} (84%)
> > 
> 
> Thanks. I have picked up patches 1 and 2.
> 
> 3 can be applied when 1 & 2 are in. The change in 4 could be applied
> independently, but it conflicts with 3.
> 
> Tony, how do you want to handle 3 and 4? I will push 1 and 2 to v4.16. I
> don't think they are real issues, so I don't see a reason to push them
> as fixes to v4.15. I think they are mostly just cleanups, and we might
> as well wait until v4.17, but that's quite far away...

In general to avoid the huge hassle of cross tree dependencies and
confusion if the dts changes are fixes, I suggest the following:

1. Nikolaus reposts the dts changes to not say word "fix" in them
   and use "update to use new binding" or something similar to avoid
   patches wrongly getting picked into earlier stable trees

2. Then I can ack the patches as they are just oneliners and
   unlikely to conflict with anything else

Regards,

Tony

Re: [PATCH v3 0/4] Fixes for omapdrm on OpenPandora and GTA04

[Bartlomiej Zolnierkiewicz]

On Thursday, November 30, 2017 12:54:07 PM Tomi Valkeinen wrote:
> On 28/11/17 17:48, H. Nikolaus Schaller wrote:
> > Changes V3:
> > * stay compatible with old DTB files which still use "toppoly" (suggested by Tomi Valkeinen)
> > * replaced MODULE_ALIAS entries by MODULE_DEVICE_TABLE (suggested by Andrew F. Davis)
> > * removed DSI VDDS patch as it has already been accepted
> > 
> > 2017-11-16 09:50:22: Changes V2:
> > * replaced patch to fix DSI VDDS for OMAP3 by equivalent patch from Laurent Pinchart
> > * keep previous compatibility option in panel driver to handle older device tree binaries
> > 
> > 2017-11-08 22:09:36:
> > This patch set fixes vendor names of the panels
> > and fixes a problem on omapdrm with enabling
> > VDD_DSI for OMAP3 which is needed for displaying
> > the Red and Green channel on OMAP3530 (Pandora).
> > 
> > H. Nikolaus Schaller (4):
> >   omapdrm: panel: fix compatible vendor string for td028ttec1
> >   omapdrm: panel: td028ttec1: replace MODULE_ALIAS by
> >     MODULE_DEVICE_TABLE
> >   DTS: GTA04: fix panel compatibility string
> >   DTS: Pandora: fix panel compatibility string
> > 
> >  .../panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt}    |  4 ++--
> >  arch/arm/boot/dts/omap3-gta04.dtsi                          |  2 +-
> >  arch/arm/boot/dts/omap3-pandora-common.dtsi                 |  2 +-
> >  drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c     | 13 ++++++++++++-
> >  .../fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c      | 12 +++++++++++-
> >  5 files changed, 27 insertions(+), 6 deletions(-)
> >  rename Documentation/devicetree/bindings/display/panel/{toppoly,td028ttec1.txt => tpo,td028ttec1.txt} (84%)
> > 
> 
> Thanks. I have picked up patches 1 and 2.

Thanks for taking care of them (they both look fine to me).

> 3 can be applied when 1 & 2 are in. The change in 4 could be applied
> independently, but it conflicts with 3.
> 
> Tony, how do you want to handle 3 and 4? I will push 1 and 2 to v4.16. I
> don't think they are real issues, so I don't see a reason to push them
> as fixes to v4.15. I think they are mostly just cleanups, and we might
> as well wait until v4.17, but that's quite far away...

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics