[PATCH] drm/tidss: Add MIT license along with GPL-2.0

[PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Devarsh Thakkar]

Modify license to include dual licensing as GPL-2.0-only OR MIT license for
tidss display driver. This allows other operating system ecosystems such as
Zephyr and also the commercial firmwares to refer and derive code from this
display driver in a more permissive manner.

Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
---
 drivers/gpu/drm/tidss/Makefile            | 2 +-
 drivers/gpu/drm/tidss/tidss_crtc.c        | 2 +-
 drivers/gpu/drm/tidss/tidss_crtc.h        | 2 +-
 drivers/gpu/drm/tidss/tidss_dispc.c       | 2 +-
 drivers/gpu/drm/tidss/tidss_dispc.h       | 2 +-
 drivers/gpu/drm/tidss/tidss_dispc_regs.h  | 2 +-
 drivers/gpu/drm/tidss/tidss_drv.c         | 2 +-
 drivers/gpu/drm/tidss/tidss_drv.h         | 2 +-
 drivers/gpu/drm/tidss/tidss_encoder.c     | 2 +-
 drivers/gpu/drm/tidss/tidss_encoder.h     | 2 +-
 drivers/gpu/drm/tidss/tidss_irq.c         | 2 +-
 drivers/gpu/drm/tidss/tidss_irq.h         | 2 +-
 drivers/gpu/drm/tidss/tidss_kms.c         | 2 +-
 drivers/gpu/drm/tidss/tidss_kms.h         | 2 +-
 drivers/gpu/drm/tidss/tidss_plane.c       | 2 +-
 drivers/gpu/drm/tidss/tidss_plane.h       | 2 +-
 drivers/gpu/drm/tidss/tidss_scale_coefs.c | 2 +-
 drivers/gpu/drm/tidss/tidss_scale_coefs.h | 2 +-
 18 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/tidss/Makefile b/drivers/gpu/drm/tidss/Makefile
index 312645271014..c67ff32d02e1 100644
--- a/drivers/gpu/drm/tidss/Makefile
+++ b/drivers/gpu/drm/tidss/Makefile
@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: GPL-2.0 OR MIT
 
 tidss-y := tidss_crtc.o \
 	tidss_drv.o \
diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
index 94f8e3178df5..43dfbead9fa9 100644
--- a/drivers/gpu/drm/tidss/tidss_crtc.c
+++ b/drivers/gpu/drm/tidss/tidss_crtc.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_crtc.h b/drivers/gpu/drm/tidss/tidss_crtc.h
index 040d1205496b..da03873e2ef0 100644
--- a/drivers/gpu/drm/tidss/tidss_crtc.h
+++ b/drivers/gpu/drm/tidss/tidss_crtc.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
index 1ad711f8d2a8..3321a1c731b1 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.c
+++ b/drivers/gpu/drm/tidss/tidss_dispc.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Jyri Sarha <jsarha@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_dispc.h b/drivers/gpu/drm/tidss/tidss_dispc.h
index 086327d51a90..e6e4396a0d63 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.h
+++ b/drivers/gpu/drm/tidss/tidss_dispc.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_dispc_regs.h b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
index 13feedfe5d6d..6e27b6d444ab 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc_regs.h
+++ b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Jyri Sarha <jsarha@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c
index d15f836dca95..b060e420ddec 100644
--- a/drivers/gpu/drm/tidss/tidss_drv.c
+++ b/drivers/gpu/drm/tidss/tidss_drv.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_drv.h b/drivers/gpu/drm/tidss/tidss_drv.h
index d7f27b0b0315..d4209234f59c 100644
--- a/drivers/gpu/drm/tidss/tidss_drv.h
+++ b/drivers/gpu/drm/tidss/tidss_drv.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_encoder.c b/drivers/gpu/drm/tidss/tidss_encoder.c
index 17a86bed8054..9749fbc0e056 100644
--- a/drivers/gpu/drm/tidss/tidss_encoder.c
+++ b/drivers/gpu/drm/tidss/tidss_encoder.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_encoder.h b/drivers/gpu/drm/tidss/tidss_encoder.h
index 3e561d6b1e83..85db3835a335 100644
--- a/drivers/gpu/drm/tidss/tidss_encoder.h
+++ b/drivers/gpu/drm/tidss/tidss_encoder.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_irq.c b/drivers/gpu/drm/tidss/tidss_irq.c
index 604334ef526a..51939744695a 100644
--- a/drivers/gpu/drm/tidss/tidss_irq.c
+++ b/drivers/gpu/drm/tidss/tidss_irq.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_irq.h b/drivers/gpu/drm/tidss/tidss_irq.h
index b512614d5863..cbfd684ecd26 100644
--- a/drivers/gpu/drm/tidss/tidss_irq.h
+++ b/drivers/gpu/drm/tidss/tidss_irq.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
index f371518f8697..05afd57b9128 100644
--- a/drivers/gpu/drm/tidss/tidss_kms.c
+++ b/drivers/gpu/drm/tidss/tidss_kms.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_kms.h b/drivers/gpu/drm/tidss/tidss_kms.h
index 632d79f5983f..69b6bca14550 100644
--- a/drivers/gpu/drm/tidss/tidss_kms.h
+++ b/drivers/gpu/drm/tidss/tidss_kms.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_plane.c b/drivers/gpu/drm/tidss/tidss_plane.c
index a5d86822c9e3..37ffaea15c73 100644
--- a/drivers/gpu/drm/tidss/tidss_plane.c
+++ b/drivers/gpu/drm/tidss/tidss_plane.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_plane.h b/drivers/gpu/drm/tidss/tidss_plane.h
index e933e158b617..3e00bc853813 100644
--- a/drivers/gpu/drm/tidss/tidss_plane.h
+++ b/drivers/gpu/drm/tidss/tidss_plane.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.c b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
index c2b84fea89a5..686ea63e0f45 100644
--- a/drivers/gpu/drm/tidss/tidss_scale_coefs.c
+++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Jyri Sarha <jsarha@ti.com>
diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.h b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
index 9c560d0fdac0..4689109fe560 100644
--- a/drivers/gpu/drm/tidss/tidss_scale_coefs.h
+++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Jyri Sarha <jsarha@ti.com>
-- 
2.39.1

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Maxime Ripard]

On Thu, 12 Sep 2024 22:41:42 +0530, Devarsh Thakkar wrote:
> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> tidss display driver. This allows other operating system ecosystems such as
> Zephyr and also the commercial firmwares to refer and derive code from this
> display driver in a more permissive manner.
> 
> 
> [ ... ]

Acked-by: Maxime Ripard <mripard@kernel.org>

Thanks!
Maxime

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Maxime Ripard]

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On Thu, Sep 12, 2024 at 06:04:11PM GMT, Maxime Ripard wrote:
> On Thu, 12 Sep 2024 22:41:42 +0530, Devarsh Thakkar wrote:
> > Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> > tidss display driver. This allows other operating system ecosystems such as
> > Zephyr and also the commercial firmwares to refer and derive code from this
> > display driver in a more permissive manner.
> > 
> > 
> > [ ... ]
> 
> Acked-by: Maxime Ripard <mripard@kernel.org>

Also, we need the ack of all contributors to that driver, so my ack
isn't enough to merge that patch.

Maxime

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Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Tomi Valkeinen]

On 12/09/2024 21:08, Maxime Ripard wrote:
> On Thu, Sep 12, 2024 at 06:04:11PM GMT, Maxime Ripard wrote:
>> On Thu, 12 Sep 2024 22:41:42 +0530, Devarsh Thakkar wrote:
>>> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
>>> tidss display driver. This allows other operating system ecosystems such as
>>> Zephyr and also the commercial firmwares to refer and derive code from this
>>> display driver in a more permissive manner.
>>>
>>>
>>> [ ... ]
>>
>> Acked-by: Maxime Ripard <mripard@kernel.org>
> 
> Also, we need the ack of all contributors to that driver, so my ack
> isn't enough to merge that patch.

IANAL, maybe a silly question: if someone from company XYZ has sent a 
patch for tidss, don't we then need an ack from someone in XYZ who's 
high enough in XYZ to allow changing the license for their code?

  Tomi

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Danilo Krummrich]

On 9/12/24 7:11 PM, Devarsh Thakkar wrote:
> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> tidss display driver. This allows other operating system ecosystems such as
> Zephyr and also the commercial firmwares to refer and derive code from this
> display driver in a more permissive manner.
> 
> Signed-off-by: Devarsh Thakkar <devarsht@ti.com>

My only contribution to this driver was through DRM refactorings,
but anyways:

Acked-by: Danilo Krummrich <dakr@kernel.org>

> ---
>   drivers/gpu/drm/tidss/Makefile            | 2 +-
>   drivers/gpu/drm/tidss/tidss_crtc.c        | 2 +-
>   drivers/gpu/drm/tidss/tidss_crtc.h        | 2 +-
>   drivers/gpu/drm/tidss/tidss_dispc.c       | 2 +-
>   drivers/gpu/drm/tidss/tidss_dispc.h       | 2 +-
>   drivers/gpu/drm/tidss/tidss_dispc_regs.h  | 2 +-
>   drivers/gpu/drm/tidss/tidss_drv.c         | 2 +-
>   drivers/gpu/drm/tidss/tidss_drv.h         | 2 +-
>   drivers/gpu/drm/tidss/tidss_encoder.c     | 2 +-
>   drivers/gpu/drm/tidss/tidss_encoder.h     | 2 +-
>   drivers/gpu/drm/tidss/tidss_irq.c         | 2 +-
>   drivers/gpu/drm/tidss/tidss_irq.h         | 2 +-
>   drivers/gpu/drm/tidss/tidss_kms.c         | 2 +-
>   drivers/gpu/drm/tidss/tidss_kms.h         | 2 +-
>   drivers/gpu/drm/tidss/tidss_plane.c       | 2 +-
>   drivers/gpu/drm/tidss/tidss_plane.h       | 2 +-
>   drivers/gpu/drm/tidss/tidss_scale_coefs.c | 2 +-
>   drivers/gpu/drm/tidss/tidss_scale_coefs.h | 2 +-
>   18 files changed, 18 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tidss/Makefile b/drivers/gpu/drm/tidss/Makefile
> index 312645271014..c67ff32d02e1 100644
> --- a/drivers/gpu/drm/tidss/Makefile
> +++ b/drivers/gpu/drm/tidss/Makefile
> @@ -1,4 +1,4 @@
> -# SPDX-License-Identifier: GPL-2.0
> +# SPDX-License-Identifier: GPL-2.0 OR MIT
>   
>   tidss-y := tidss_crtc.o \
>   	tidss_drv.o \
> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
> index 94f8e3178df5..43dfbead9fa9 100644
> --- a/drivers/gpu/drm/tidss/tidss_crtc.c
> +++ b/drivers/gpu/drm/tidss/tidss_crtc.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.h b/drivers/gpu/drm/tidss/tidss_crtc.h
> index 040d1205496b..da03873e2ef0 100644
> --- a/drivers/gpu/drm/tidss/tidss_crtc.h
> +++ b/drivers/gpu/drm/tidss/tidss_crtc.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
> index 1ad711f8d2a8..3321a1c731b1 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc.c
> +++ b/drivers/gpu/drm/tidss/tidss_dispc.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc.h b/drivers/gpu/drm/tidss/tidss_dispc.h
> index 086327d51a90..e6e4396a0d63 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc.h
> +++ b/drivers/gpu/drm/tidss/tidss_dispc.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc_regs.h b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> index 13feedfe5d6d..6e27b6d444ab 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> +++ b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c
> index d15f836dca95..b060e420ddec 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.c
> +++ b/drivers/gpu/drm/tidss/tidss_drv.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.h b/drivers/gpu/drm/tidss/tidss_drv.h
> index d7f27b0b0315..d4209234f59c 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.h
> +++ b/drivers/gpu/drm/tidss/tidss_drv.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_encoder.c b/drivers/gpu/drm/tidss/tidss_encoder.c
> index 17a86bed8054..9749fbc0e056 100644
> --- a/drivers/gpu/drm/tidss/tidss_encoder.c
> +++ b/drivers/gpu/drm/tidss/tidss_encoder.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_encoder.h b/drivers/gpu/drm/tidss/tidss_encoder.h
> index 3e561d6b1e83..85db3835a335 100644
> --- a/drivers/gpu/drm/tidss/tidss_encoder.h
> +++ b/drivers/gpu/drm/tidss/tidss_encoder.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_irq.c b/drivers/gpu/drm/tidss/tidss_irq.c
> index 604334ef526a..51939744695a 100644
> --- a/drivers/gpu/drm/tidss/tidss_irq.c
> +++ b/drivers/gpu/drm/tidss/tidss_irq.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_irq.h b/drivers/gpu/drm/tidss/tidss_irq.h
> index b512614d5863..cbfd684ecd26 100644
> --- a/drivers/gpu/drm/tidss/tidss_irq.h
> +++ b/drivers/gpu/drm/tidss/tidss_irq.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
> index f371518f8697..05afd57b9128 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.c
> +++ b/drivers/gpu/drm/tidss/tidss_kms.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.h b/drivers/gpu/drm/tidss/tidss_kms.h
> index 632d79f5983f..69b6bca14550 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.h
> +++ b/drivers/gpu/drm/tidss/tidss_kms.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_plane.c b/drivers/gpu/drm/tidss/tidss_plane.c
> index a5d86822c9e3..37ffaea15c73 100644
> --- a/drivers/gpu/drm/tidss/tidss_plane.c
> +++ b/drivers/gpu/drm/tidss/tidss_plane.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_plane.h b/drivers/gpu/drm/tidss/tidss_plane.h
> index e933e158b617..3e00bc853813 100644
> --- a/drivers/gpu/drm/tidss/tidss_plane.h
> +++ b/drivers/gpu/drm/tidss/tidss_plane.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.c b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> index c2b84fea89a5..686ea63e0f45 100644
> --- a/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> +++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.h b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> index 9c560d0fdac0..4689109fe560 100644
> --- a/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> +++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>   /*
>    * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>    * Author: Jyri Sarha <jsarha@ti.com>

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Andrew Halaney]

On Thu, Sep 12, 2024 at 10:41:42PM GMT, Devarsh Thakkar wrote:
> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> tidss display driver. This allows other operating system ecosystems such as
> Zephyr and also the commercial firmwares to refer and derive code from this
> display driver in a more permissive manner.
> 
> Signed-off-by: Devarsh Thakkar <devarsht@ti.com>

Acked-by: Andrew Halaney <ahalaney@redhat.com>

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Laurent Pinchart]

On Thu, Sep 12, 2024 at 09:21:19PM +0300, Tomi Valkeinen wrote:
> On 12/09/2024 21:08, Maxime Ripard wrote:
> > On Thu, Sep 12, 2024 at 06:04:11PM GMT, Maxime Ripard wrote:
> >> On Thu, 12 Sep 2024 22:41:42 +0530, Devarsh Thakkar wrote:
> >>> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> >>> tidss display driver. This allows other operating system ecosystems such as
> >>> Zephyr and also the commercial firmwares to refer and derive code from this
> >>> display driver in a more permissive manner.
> >>>
> >>>
> >>> [ ... ]
> >>
> >> Acked-by: Maxime Ripard <mripard@kernel.org>
> > 
> > Also, we need the ack of all contributors to that driver, so my ack
> > isn't enough to merge that patch.
> 
> IANAL, maybe a silly question: if someone from company XYZ has sent a 
> patch for tidss, don't we then need an ack from someone in XYZ who's 
> high enough in XYZ to allow changing the license for their code?

This patch needs to be acked by all copyright holders indeed. For
contributions whose copyright has been assigned to other entities (such
as work performed by employees for their employers), those other
entities have to ack the license change. What constitutes a substantial
enough contribution to be copyrightable is a question I won't attempt to
answer.

-- 
Regards,

Laurent Pinchart

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Uwe Kleine-König]

[-- Attachment #1: Type: text/plain, Size: 914 bytes --]

Hello,

On Thu, Sep 12, 2024 at 10:47:31PM +0200, Danilo Krummrich wrote:
> On 9/12/24 7:11 PM, Devarsh Thakkar wrote:
> > Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> > tidss display driver. This allows other operating system ecosystems such as
> > Zephyr and also the commercial firmwares to refer and derive code from this
> > display driver in a more permissive manner.
> > 
> > Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
> 
> My only contribution to this driver was through DRM refactorings,
> but anyways:
> 
> Acked-by: Danilo Krummrich <dakr@kernel.org>

Similar for me. I only touched one of the affected files with a
refactoring change (34cdd1f691ade28abd36ce3cab8f9d442f43bf3f). I don't
assume this gives me any copyright to that driver, but to simplify
things:

Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>

Best regards
Uwe

[-- Attachment #2: signature.asc --]
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Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Javier Martinez Canillas]

Uwe Kleine-König <u.kleine-koenig@baylibre.com> writes:

> Hello,
>
> On Thu, Sep 12, 2024 at 10:47:31PM +0200, Danilo Krummrich wrote:
>> On 9/12/24 7:11 PM, Devarsh Thakkar wrote:
>> > Modify license to include dual licensing as GPL-2.0-only OR MIT license for
>> > tidss display driver. This allows other operating system ecosystems such as
>> > Zephyr and also the commercial firmwares to refer and derive code from this
>> > display driver in a more permissive manner.
>> > 
>> > Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
>> 
>> My only contribution to this driver was through DRM refactorings,
>> but anyways:
>> 
>> Acked-by: Danilo Krummrich <dakr@kernel.org>
>
> Similar for me. I only touched one of the affected files with a
> refactoring change (34cdd1f691ade28abd36ce3cab8f9d442f43bf3f). I don't
> assume this gives me any copyright to that driver, but to simplify
> things:
>
> Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
>

Similar for me too. My only change to this driver I think was to add DRM
panic support in commit b2cb6011bcaf ("drm/tidss: Add drm_panic support").

But I'm also OK with the change, so:

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Geert Uytterhoeven]

On Fri, Sep 13, 2024 at 9:38 AM Javier Martinez Canillas
<javierm@redhat.com> wrote:
> Uwe Kleine-König <u.kleine-koenig@baylibre.com> writes:

> > On Thu, Sep 12, 2024 at 10:47:31PM +0200, Danilo Krummrich wrote:
> >> On 9/12/24 7:11 PM, Devarsh Thakkar wrote:
> >> > Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> >> > tidss display driver. This allows other operating system ecosystems such as
> >> > Zephyr and also the commercial firmwares to refer and derive code from this
> >> > display driver in a more permissive manner.
> >> >
> >> > Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
> >>
> >> My only contribution to this driver was through DRM refactorings,
> >> but anyways:
> >>
> >> Acked-by: Danilo Krummrich <dakr@kernel.org>
> >
> > Similar for me. I only touched one of the affected files with a
> > refactoring change (34cdd1f691ade28abd36ce3cab8f9d442f43bf3f). I don't
> > assume this gives me any copyright to that driver, but to simplify
> > things:
> >
> > Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
>
> Similar for me too. My only change to this driver I think was to add DRM
> panic support in commit b2cb6011bcaf ("drm/tidss: Add drm_panic support").
>
> But I'm also OK with the change, so:
>
> Acked-by: Javier Martinez Canillas <javierm@redhat.com>

Similar for me, just a forgotten comment update.

Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[jyri.sarha]

September 12, 2024 at 8:11 PM, "Devarsh Thakkar" <devarsht@ti.com mailto:devarsht@ti.com?to=%22Devarsh%20Thakkar%22%20%3Cdevarsht%40ti.com%3E > wrote:

> 
> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> tidss display driver. This allows other operating system ecosystems such as
> Zephyr and also the commercial firmwares to refer and derive code from this
> display driver in a more permissive manner.
> 
> Signed-off-by: Devarsh Thakkar <devarsht@ti.com>

Acked-by: Jyri Sarha <jyri.sarha@iki.fi>

I guess tehnically my ack would not be needed as TI owns the code I've writen for tidss, but here it goes anyway.

Best regards,
Jyri

> ---
> drivers/gpu/drm/tidss/Makefile | 2 +-
> drivers/gpu/drm/tidss/tidss_crtc.c | 2 +-
> drivers/gpu/drm/tidss/tidss_crtc.h | 2 +-
> drivers/gpu/drm/tidss/tidss_dispc.c | 2 +-
> drivers/gpu/drm/tidss/tidss_dispc.h | 2 +-
> drivers/gpu/drm/tidss/tidss_dispc_regs.h | 2 +-
> drivers/gpu/drm/tidss/tidss_drv.c | 2 +-
> drivers/gpu/drm/tidss/tidss_drv.h | 2 +-
> drivers/gpu/drm/tidss/tidss_encoder.c | 2 +-
> drivers/gpu/drm/tidss/tidss_encoder.h | 2 +-
> drivers/gpu/drm/tidss/tidss_irq.c | 2 +-
> drivers/gpu/drm/tidss/tidss_irq.h | 2 +-
> drivers/gpu/drm/tidss/tidss_kms.c | 2 +-
> drivers/gpu/drm/tidss/tidss_kms.h | 2 +-
> drivers/gpu/drm/tidss/tidss_plane.c | 2 +-
> drivers/gpu/drm/tidss/tidss_plane.h | 2 +-
> drivers/gpu/drm/tidss/tidss_scale_coefs.c | 2 +-
> drivers/gpu/drm/tidss/tidss_scale_coefs.h | 2 +-
> 18 files changed, 18 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tidss/Makefile b/drivers/gpu/drm/tidss/Makefile
> index 312645271014..c67ff32d02e1 100644
> --- a/drivers/gpu/drm/tidss/Makefile
> +++ b/drivers/gpu/drm/tidss/Makefile
> @@ -1,4 +1,4 @@
> -# SPDX-License-Identifier: GPL-2.0
> +# SPDX-License-Identifier: GPL-2.0 OR MIT
> 
> tidss-y := tidss_crtc.o \
>  tidss_drv.o \
> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
> index 94f8e3178df5..43dfbead9fa9 100644
> --- a/drivers/gpu/drm/tidss/tidss_crtc.c
> +++ b/drivers/gpu/drm/tidss/tidss_crtc.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.h b/drivers/gpu/drm/tidss/tidss_crtc.h
> index 040d1205496b..da03873e2ef0 100644
> --- a/drivers/gpu/drm/tidss/tidss_crtc.h
> +++ b/drivers/gpu/drm/tidss/tidss_crtc.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
> index 1ad711f8d2a8..3321a1c731b1 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc.c
> +++ b/drivers/gpu/drm/tidss/tidss_dispc.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc.h b/drivers/gpu/drm/tidss/tidss_dispc.h
> index 086327d51a90..e6e4396a0d63 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc.h
> +++ b/drivers/gpu/drm/tidss/tidss_dispc.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc_regs.h b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> index 13feedfe5d6d..6e27b6d444ab 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> +++ b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c
> index d15f836dca95..b060e420ddec 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.c
> +++ b/drivers/gpu/drm/tidss/tidss_drv.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.h b/drivers/gpu/drm/tidss/tidss_drv.h
> index d7f27b0b0315..d4209234f59c 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.h
> +++ b/drivers/gpu/drm/tidss/tidss_drv.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_encoder.c b/drivers/gpu/drm/tidss/tidss_encoder.c
> index 17a86bed8054..9749fbc0e056 100644
> --- a/drivers/gpu/drm/tidss/tidss_encoder.c
> +++ b/drivers/gpu/drm/tidss/tidss_encoder.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_encoder.h b/drivers/gpu/drm/tidss/tidss_encoder.h
> index 3e561d6b1e83..85db3835a335 100644
> --- a/drivers/gpu/drm/tidss/tidss_encoder.h
> +++ b/drivers/gpu/drm/tidss/tidss_encoder.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_irq.c b/drivers/gpu/drm/tidss/tidss_irq.c
> index 604334ef526a..51939744695a 100644
> --- a/drivers/gpu/drm/tidss/tidss_irq.c
> +++ b/drivers/gpu/drm/tidss/tidss_irq.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_irq.h b/drivers/gpu/drm/tidss/tidss_irq.h
> index b512614d5863..cbfd684ecd26 100644
> --- a/drivers/gpu/drm/tidss/tidss_irq.h
> +++ b/drivers/gpu/drm/tidss/tidss_irq.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
> index f371518f8697..05afd57b9128 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.c
> +++ b/drivers/gpu/drm/tidss/tidss_kms.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.h b/drivers/gpu/drm/tidss/tidss_kms.h
> index 632d79f5983f..69b6bca14550 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.h
> +++ b/drivers/gpu/drm/tidss/tidss_kms.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_plane.c b/drivers/gpu/drm/tidss/tidss_plane.c
> index a5d86822c9e3..37ffaea15c73 100644
> --- a/drivers/gpu/drm/tidss/tidss_plane.c
> +++ b/drivers/gpu/drm/tidss/tidss_plane.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_plane.h b/drivers/gpu/drm/tidss/tidss_plane.h
> index e933e158b617..3e00bc853813 100644
> --- a/drivers/gpu/drm/tidss/tidss_plane.h
> +++ b/drivers/gpu/drm/tidss/tidss_plane.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.c b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> index c2b84fea89a5..686ea63e0f45 100644
> --- a/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> +++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.h b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> index 9c560d0fdac0..4689109fe560 100644
> --- a/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> +++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
> /*
> * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
> * Author: Jyri Sarha <jsarha@ti.com>
> -- 
> 2.39.1
>

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Laurent Pinchart]

Hi Devarsh,

On Thu, Sep 12, 2024 at 10:41:42PM +0530, Devarsh Thakkar wrote:
> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
> tidss display driver. This allows other operating system ecosystems such as
> Zephyr and also the commercial firmwares to refer and derive code from this

GPL-2.0 isn't incompatible with "commercial". I think you mean
"proprietary" here.

> display driver in a more permissive manner.

How do you envision that to work ? Zephyr doesn't have KMS, so you can't
use the driver as-is. What exactly would TI want to use from the Linux
kernel driver ?

Personally, there's a reason why I contribute code to the kernel under
the GPL-2.0 license, it is to make sure the code will remain open. While
I can accept other licenses on a case-by-case basis, I don't like the
casual approach of this patch that seem (to me) to imply that the
license is a mere detail. For a start I would like to know what
"commercial firmwares" you're thinking about.

> Signed-off-by: Devarsh Thakkar <devarsht@ti.com>
> ---
>  drivers/gpu/drm/tidss/Makefile            | 2 +-
>  drivers/gpu/drm/tidss/tidss_crtc.c        | 2 +-
>  drivers/gpu/drm/tidss/tidss_crtc.h        | 2 +-
>  drivers/gpu/drm/tidss/tidss_dispc.c       | 2 +-
>  drivers/gpu/drm/tidss/tidss_dispc.h       | 2 +-
>  drivers/gpu/drm/tidss/tidss_dispc_regs.h  | 2 +-
>  drivers/gpu/drm/tidss/tidss_drv.c         | 2 +-
>  drivers/gpu/drm/tidss/tidss_drv.h         | 2 +-
>  drivers/gpu/drm/tidss/tidss_encoder.c     | 2 +-
>  drivers/gpu/drm/tidss/tidss_encoder.h     | 2 +-
>  drivers/gpu/drm/tidss/tidss_irq.c         | 2 +-
>  drivers/gpu/drm/tidss/tidss_irq.h         | 2 +-
>  drivers/gpu/drm/tidss/tidss_kms.c         | 2 +-
>  drivers/gpu/drm/tidss/tidss_kms.h         | 2 +-
>  drivers/gpu/drm/tidss/tidss_plane.c       | 2 +-
>  drivers/gpu/drm/tidss/tidss_plane.h       | 2 +-
>  drivers/gpu/drm/tidss/tidss_scale_coefs.c | 2 +-
>  drivers/gpu/drm/tidss/tidss_scale_coefs.h | 2 +-
>  18 files changed, 18 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tidss/Makefile b/drivers/gpu/drm/tidss/Makefile
> index 312645271014..c67ff32d02e1 100644
> --- a/drivers/gpu/drm/tidss/Makefile
> +++ b/drivers/gpu/drm/tidss/Makefile
> @@ -1,4 +1,4 @@
> -# SPDX-License-Identifier: GPL-2.0
> +# SPDX-License-Identifier: GPL-2.0 OR MIT
>  
>  tidss-y := tidss_crtc.o \
>  	tidss_drv.o \
> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c
> index 94f8e3178df5..43dfbead9fa9 100644
> --- a/drivers/gpu/drm/tidss/tidss_crtc.c
> +++ b/drivers/gpu/drm/tidss/tidss_crtc.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_crtc.h b/drivers/gpu/drm/tidss/tidss_crtc.h
> index 040d1205496b..da03873e2ef0 100644
> --- a/drivers/gpu/drm/tidss/tidss_crtc.h
> +++ b/drivers/gpu/drm/tidss/tidss_crtc.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
> index 1ad711f8d2a8..3321a1c731b1 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc.c
> +++ b/drivers/gpu/drm/tidss/tidss_dispc.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc.h b/drivers/gpu/drm/tidss/tidss_dispc.h
> index 086327d51a90..e6e4396a0d63 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc.h
> +++ b/drivers/gpu/drm/tidss/tidss_dispc.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_dispc_regs.h b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> index 13feedfe5d6d..6e27b6d444ab 100644
> --- a/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> +++ b/drivers/gpu/drm/tidss/tidss_dispc_regs.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c
> index d15f836dca95..b060e420ddec 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.c
> +++ b/drivers/gpu/drm/tidss/tidss_drv.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.h b/drivers/gpu/drm/tidss/tidss_drv.h
> index d7f27b0b0315..d4209234f59c 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.h
> +++ b/drivers/gpu/drm/tidss/tidss_drv.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_encoder.c b/drivers/gpu/drm/tidss/tidss_encoder.c
> index 17a86bed8054..9749fbc0e056 100644
> --- a/drivers/gpu/drm/tidss/tidss_encoder.c
> +++ b/drivers/gpu/drm/tidss/tidss_encoder.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_encoder.h b/drivers/gpu/drm/tidss/tidss_encoder.h
> index 3e561d6b1e83..85db3835a335 100644
> --- a/drivers/gpu/drm/tidss/tidss_encoder.h
> +++ b/drivers/gpu/drm/tidss/tidss_encoder.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_irq.c b/drivers/gpu/drm/tidss/tidss_irq.c
> index 604334ef526a..51939744695a 100644
> --- a/drivers/gpu/drm/tidss/tidss_irq.c
> +++ b/drivers/gpu/drm/tidss/tidss_irq.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_irq.h b/drivers/gpu/drm/tidss/tidss_irq.h
> index b512614d5863..cbfd684ecd26 100644
> --- a/drivers/gpu/drm/tidss/tidss_irq.h
> +++ b/drivers/gpu/drm/tidss/tidss_irq.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c
> index f371518f8697..05afd57b9128 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.c
> +++ b/drivers/gpu/drm/tidss/tidss_kms.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_kms.h b/drivers/gpu/drm/tidss/tidss_kms.h
> index 632d79f5983f..69b6bca14550 100644
> --- a/drivers/gpu/drm/tidss/tidss_kms.h
> +++ b/drivers/gpu/drm/tidss/tidss_kms.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_plane.c b/drivers/gpu/drm/tidss/tidss_plane.c
> index a5d86822c9e3..37ffaea15c73 100644
> --- a/drivers/gpu/drm/tidss/tidss_plane.c
> +++ b/drivers/gpu/drm/tidss/tidss_plane.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_plane.h b/drivers/gpu/drm/tidss/tidss_plane.h
> index e933e158b617..3e00bc853813 100644
> --- a/drivers/gpu/drm/tidss/tidss_plane.h
> +++ b/drivers/gpu/drm/tidss/tidss_plane.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.c b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> index c2b84fea89a5..686ea63e0f45 100644
> --- a/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> +++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.c
> @@ -1,4 +1,4 @@
> -// SPDX-License-Identifier: GPL-2.0
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Jyri Sarha <jsarha@ti.com>
> diff --git a/drivers/gpu/drm/tidss/tidss_scale_coefs.h b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> index 9c560d0fdac0..4689109fe560 100644
> --- a/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> +++ b/drivers/gpu/drm/tidss/tidss_scale_coefs.h
> @@ -1,4 +1,4 @@
> -/* SPDX-License-Identifier: GPL-2.0 */
> +/* SPDX-License-Identifier: GPL-2.0 OR MIT */
>  /*
>   * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
>   * Author: Jyri Sarha <jsarha@ti.com>

-- 
Regards,

Laurent Pinchart

Re: [PATCH] drm/tidss: Add MIT license along with GPL-2.0

[Devarsh Thakkar]

Hi Laurent,

Thanks for the quick review.

On 13/09/24 13:54, Laurent Pinchart wrote:
> Hi Devarsh,
> 
> On Thu, Sep 12, 2024 at 10:41:42PM +0530, Devarsh Thakkar wrote:
>> Modify license to include dual licensing as GPL-2.0-only OR MIT license for
>> tidss display driver. This allows other operating system ecosystems such as
>> Zephyr and also the commercial firmwares to refer and derive code from this
> 
> GPL-2.0 isn't incompatible with "commercial". I think you mean
> "proprietary" here.
> 

Yes, GPL-2.0 is not incompatible to commercial but there is an enforecement
that derivative code needs to be GPL-2.0 licensed which may not fit well for
projects which are not using GPL-2.0 license. But yes MIT will also help
proprietary code, so I agree it is good to mention the same in commit message.

>> display driver in a more permissive manner.
> 
> How do you envision that to work ? Zephyr doesn't have KMS, so you can't
> use the driver as-is. What exactly would TI want to use from the Linux
> kernel driver ?
> 

Not the DRM/KMS part, but the tidss specific display controller programming is
the main point of interest. For e.g. At this point, mostly I see that the TI
customers are interested to re-use/derive code from u-boot tidss driver [1]
which is quite simple and use it in their test application or RTOS based
offerring which is non-GPL code. Since their test application has much more
code apart from the display part, which is non-GPL, they can't use GPL license.

Now since the u-boot tidss driver is derived from kernel tidss driver, my
understanding was that we need to change the license of kernel tidss driver
first before changing the u-boot tidss driver.

> Personally, there's a reason why I contribute code to the kernel under
> the GPL-2.0 license, it is to make sure the code will remain open. While
> I can accept other licenses on a case-by-case basis, I don't like the
> casual approach of this patch that seem (to me) to imply that the
> license is a mere detail. For a start I would like to know what
> "commercial firmwares" you're thinking about.
> 

Understood, let me know if above information suffice or any further
information is needed.

[1]:
https://gitlab.com/u-boot/u-boot/-/blob/master/drivers/video/tidss/tidss_drv.c?ref_type=heads

Regards
Devarsh