[PATCH v2 0/9] drm: Extend COMPILE_TEST support to some ARM drivers

[PATCH v2 0/9] drm: Extend COMPILE_TEST support to some ARM drivers

[Laurent Pinchart]

Hello,

This patch series stems from subsystem-wide changes I wanted to
compile-test with an ARM64 cross-compiler. My laziness to fire a 32-bit
ARM build definitely resulted in more time being spent writing these
patches, but hopefully they'll turn out to be useful for more people.

Patches 1/9 to 3/7 are fixes for compilation warnings on 64-bit
platforms in the omapdrm and sti-drm drivers. They are a dependency for
the Kconfig changes that follow to avoid introducing build warnings, but
could also be merged before.

Patches 3/9 to 8/9 enable compilation of the imx-dcss, omapdrm, sti-drm
and tegra-drm drivers on all architectures with COMPILE_TEST. I have
tested compilation on arm64 and x86, with W=1. The patches are
independent from each other, so they can be picked by their respective
maintainers.

The last patch, 9/9, extends COMPILE_TEST support for the tilcdc driver
to ARM64. The driver doesn't compile on x86 due to a missing __iowmb(),
and I haven't taken the time to investigate how to solve this properly.

The main change since v1 is the extension of COMPILE_TEST to all
platforms instead of only ARM and ARM64.

Please feel free to pick patches individually for the driver(s) you
maintain.

Laurent Pinchart (9):
  drm/omap: Use correct printk format specifiers for size_t
  drm/omap: Cast pointer to integer without generating warning
  drm/sti: Use correct printk format specifiers for size_t
  drm/imx/dcss: Enable COMPILE_TEST on all architectures
  drm/omap: Enable COMPILE_TEST on all architectures
  drm/rcar-du: Enable COMPILE_TEST on all architectures
  drm/sti: Enable COMPILE_TEST on all architectures
  drm/tegra: Enable COMPILE_TEST on all architectures
  drm/tilcdc: Enable COMPILE_TEST on all ARM64 platforms

 drivers/gpu/drm/imx/dcss/Kconfig   | 3 ++-
 drivers/gpu/drm/omapdrm/Kconfig    | 2 +-
 drivers/gpu/drm/omapdrm/dss/dsi.c  | 4 ++--
 drivers/gpu/drm/omapdrm/omap_drv.c | 2 +-
 drivers/gpu/drm/rcar-du/Kconfig    | 1 -
 drivers/gpu/drm/sti/Kconfig        | 3 ++-
 drivers/gpu/drm/sti/sti_hqvdp.c    | 4 ++--
 drivers/gpu/drm/tegra/Kconfig      | 2 +-
 drivers/gpu/drm/tilcdc/Kconfig     | 3 ++-
 drivers/gpu/host1x/Kconfig         | 2 +-
 10 files changed, 14 insertions(+), 12 deletions(-)

-- 
Regards,

Laurent Pinchart

[PATCH v2 1/9] drm/omap: Use correct printk format specifiers for size_t

[Laurent Pinchart]

The correct format specifier for size_t is %zu. Using %d (or %u)
generates a warning on 64-bit platforms. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/gpu/drm/omapdrm/dss/dsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
index 5f1722b040f4..503b5d4bf2c2 100644
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -2094,7 +2094,7 @@ static int dsi_vc_send_long(struct dsi_data *dsi, int vc,
 	u8 b1, b2, b3, b4;
 
 	if (dsi->debug_write)
-		DSSDBG("dsi_vc_send_long, %d bytes\n", msg->tx_len);
+		DSSDBG("dsi_vc_send_long, %zu bytes\n", msg->tx_len);
 
 	/* len + header */
 	if (dsi->vc[vc].tx_fifo_size * 32 * 4 < msg->tx_len + 4) {
@@ -2390,7 +2390,7 @@ static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int vc,
 
 	return 0;
 err:
-	DSSERR("%s(vc %d, reqlen %d) failed\n", __func__,  vc, msg->tx_len);
+	DSSERR("%s(vc %d, reqlen %zu) failed\n", __func__,  vc, msg->tx_len);
 	return r;
 }
 
-- 
Regards,

Laurent Pinchart

Re: [PATCH v2 1/9] drm/omap: Use correct printk format specifiers for size_t

[Tomi Valkeinen]

On 31/07/2021 04:39, Laurent Pinchart wrote:
> The correct format specifier for size_t is %zu. Using %d (or %u)
> generates a warning on 64-bit platforms. Fix it.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>   drivers/gpu/drm/omapdrm/dss/dsi.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index 5f1722b040f4..503b5d4bf2c2 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -2094,7 +2094,7 @@ static int dsi_vc_send_long(struct dsi_data *dsi, int vc,
>   	u8 b1, b2, b3, b4;
>   
>   	if (dsi->debug_write)
> -		DSSDBG("dsi_vc_send_long, %d bytes\n", msg->tx_len);
> +		DSSDBG("dsi_vc_send_long, %zu bytes\n", msg->tx_len);
>   
>   	/* len + header */
>   	if (dsi->vc[vc].tx_fifo_size * 32 * 4 < msg->tx_len + 4) {
> @@ -2390,7 +2390,7 @@ static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int vc,
>   
>   	return 0;
>   err:
> -	DSSERR("%s(vc %d, reqlen %d) failed\n", __func__,  vc, msg->tx_len);
> +	DSSERR("%s(vc %d, reqlen %zu) failed\n", __func__,  vc, msg->tx_len);
>   	return r;
>   }
>   
> 

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

  Tomi

[PATCH v2 2/9] drm/omap: Cast pointer to integer without generating warning

[Laurent Pinchart]

On 64-bit platforms, the compiler complains that casting a void pointer
to an unsigned int loses data. Cast the pointer to a uintptr_t unsigned
to fix this.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/gpu/drm/omapdrm/omap_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index f86e20578143..c05d3975cb31 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -572,7 +572,7 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
 	priv->dss->mgr_ops_priv = priv;
 
 	soc = soc_device_match(omapdrm_soc_devices);
-	priv->omaprev = soc ? (unsigned int)soc->data : 0;
+	priv->omaprev = soc ? (uintptr_t)soc->data : 0;
 	priv->wq = alloc_ordered_workqueue("omapdrm", 0);
 
 	mutex_init(&priv->list_lock);
-- 
Regards,

Laurent Pinchart

Re: [PATCH v2 2/9] drm/omap: Cast pointer to integer without generating warning

[Sergei Shtylyov]

Hello

On 31.07.2021 4:39, Laurent Pinchart wrote:

> On 64-bit platforms, the compiler complains that casting a void pointer
> to an unsigned int loses data. Cast the pointer to a uintptr_t unsigned

    Is "unsigned" really needed here?

> to fix this.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>   drivers/gpu/drm/omapdrm/omap_drv.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index f86e20578143..c05d3975cb31 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -572,7 +572,7 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
>   	priv->dss->mgr_ops_priv = priv;
>   
>   	soc = soc_device_match(omapdrm_soc_devices);
> -	priv->omaprev = soc ? (unsigned int)soc->data : 0;
> +	priv->omaprev = soc ? (uintptr_t)soc->data : 0;
>   	priv->wq = alloc_ordered_workqueue("omapdrm", 0);
>   
>   	mutex_init(&priv->list_lock);

MBR, Sergei

Re: [PATCH v2 2/9] drm/omap: Cast pointer to integer without generating warning

[Laurent Pinchart]

Hi Sergey,

On Sat, Jul 31, 2021 at 01:12:58PM +0300, Sergei Shtylyov wrote:
> On 31.07.2021 4:39, Laurent Pinchart wrote:
> 
> > On 64-bit platforms, the compiler complains that casting a void pointer
> > to an unsigned int loses data. Cast the pointer to a uintptr_t unsigned
> 
>     Is "unsigned" really needed here?

No it's not :-) I'll s/uintptr_t unsigned/uintptr_t/.

> > to fix this.
> > 
> > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> > ---
> >   drivers/gpu/drm/omapdrm/omap_drv.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> > index f86e20578143..c05d3975cb31 100644
> > --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> > +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> > @@ -572,7 +572,7 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
> >   	priv->dss->mgr_ops_priv = priv;
> >   
> >   	soc = soc_device_match(omapdrm_soc_devices);
> > -	priv->omaprev = soc ? (unsigned int)soc->data : 0;
> > +	priv->omaprev = soc ? (uintptr_t)soc->data : 0;
> >   	priv->wq = alloc_ordered_workqueue("omapdrm", 0);
> >   
> >   	mutex_init(&priv->list_lock);

-- 
Regards,

Laurent Pinchart

Re: [PATCH v2 2/9] drm/omap: Cast pointer to integer without generating warning

[Tomi Valkeinen]

On 31/07/2021 04:39, Laurent Pinchart wrote:
> On 64-bit platforms, the compiler complains that casting a void pointer
> to an unsigned int loses data. Cast the pointer to a uintptr_t unsigned
> to fix this.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
>   drivers/gpu/drm/omapdrm/omap_drv.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index f86e20578143..c05d3975cb31 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -572,7 +572,7 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
>   	priv->dss->mgr_ops_priv = priv;
>   
>   	soc = soc_device_match(omapdrm_soc_devices);
> -	priv->omaprev = soc ? (unsigned int)soc->data : 0;
> +	priv->omaprev = soc ? (uintptr_t)soc->data : 0;
>   	priv->wq = alloc_ordered_workqueue("omapdrm", 0);
>   
>   	mutex_init(&priv->list_lock);
> 

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

  Tomi

[PATCH v2 3/9] drm/sti: Use correct printk format specifiers for size_t

[Laurent Pinchart]

The correct format specifier for size_t is %zu. Using %d (or %u)
generates a warning on 64-bit platforms. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Philippe Cornu <philippe.cornu@foss.st.com>
---
 drivers/gpu/drm/sti/sti_hqvdp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sti/sti_hqvdp.c b/drivers/gpu/drm/sti/sti_hqvdp.c
index d09b08995b12..3c61ba8b43e0 100644
--- a/drivers/gpu/drm/sti/sti_hqvdp.c
+++ b/drivers/gpu/drm/sti/sti_hqvdp.c
@@ -927,12 +927,12 @@ static void sti_hqvdp_start_xp70(struct sti_hqvdp *hqvdp)
 
 	header = (struct fw_header *)firmware->data;
 	if (firmware->size < sizeof(*header)) {
-		DRM_ERROR("Invalid firmware size (%d)\n", firmware->size);
+		DRM_ERROR("Invalid firmware size (%zu)\n", firmware->size);
 		goto out;
 	}
 	if ((sizeof(*header) + header->rd_size + header->wr_size +
 		header->pmem_size + header->dmem_size) != firmware->size) {
-		DRM_ERROR("Invalid fmw structure (%d+%d+%d+%d+%d != %d)\n",
+		DRM_ERROR("Invalid fmw structure (%zu+%d+%d+%d+%d != %zu)\n",
 			  sizeof(*header), header->rd_size, header->wr_size,
 			  header->pmem_size, header->dmem_size,
 			  firmware->size);
-- 
Regards,

Laurent Pinchart

[PATCH v2 4/9] drm/imx/dcss: Enable COMPILE_TEST on all architectures

[Laurent Pinchart]

To extend test coverage, relax the dependency on ARCH_MXC and ARM64 to
also enable compilation when COMPILE_TEST is selected.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v1:

- Enable COMPILE_TEST on all architectures
---
 drivers/gpu/drm/imx/dcss/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/imx/dcss/Kconfig b/drivers/gpu/drm/imx/dcss/Kconfig
index 2b17a964ff05..451ed05321cc 100644
--- a/drivers/gpu/drm/imx/dcss/Kconfig
+++ b/drivers/gpu/drm/imx/dcss/Kconfig
@@ -3,7 +3,8 @@ config DRM_IMX_DCSS
 	select IMX_IRQSTEER
 	select DRM_KMS_CMA_HELPER
 	select VIDEOMODE_HELPERS
-	depends on DRM && ARCH_MXC && ARM64
+	depends on DRM
+	depends on (ARCH_MXC && ARM64) || COMPILE_TEST
 	help
 	  Choose this if you have a NXP i.MX8MQ based system and want to use the
 	  Display Controller Subsystem. This option enables DCSS support.
-- 
Regards,

Laurent Pinchart

[PATCH v2 5/9] drm/omap: Enable COMPILE_TEST on all architectures

[Laurent Pinchart]

To extend test coverage, relax the dependency on ARCH_OMAP2PLUS or
ARCH_MULTIPLATFORM to also enable compilation with COMPILE_TEST.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v1:

- Enable COMPILE_TEST on all architectures
---
 drivers/gpu/drm/omapdrm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/Kconfig b/drivers/gpu/drm/omapdrm/Kconfig
index e7281da5bc6a..560d0cdd6156 100644
--- a/drivers/gpu/drm/omapdrm/Kconfig
+++ b/drivers/gpu/drm/omapdrm/Kconfig
@@ -2,7 +2,7 @@
 config DRM_OMAP
 	tristate "OMAP DRM"
 	depends on DRM
-	depends on ARCH_OMAP2PLUS || ARCH_MULTIPLATFORM
+	depends on ARCH_OMAP2PLUS || ARCH_MULTIPLATFORM || COMPILE_TEST
 	select OMAP2_DSS
 	select DRM_KMS_HELPER
 	select VIDEOMODE_HELPERS
-- 
Regards,

Laurent Pinchart

Re: [PATCH v2 5/9] drm/omap: Enable COMPILE_TEST on all architectures

[Tomi Valkeinen]

On 31/07/2021 04:39, Laurent Pinchart wrote:
> To extend test coverage, relax the dependency on ARCH_OMAP2PLUS or
> ARCH_MULTIPLATFORM to also enable compilation with COMPILE_TEST.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> ---
> Changes since v1:
> 
> - Enable COMPILE_TEST on all architectures
> ---
>   drivers/gpu/drm/omapdrm/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/Kconfig b/drivers/gpu/drm/omapdrm/Kconfig
> index e7281da5bc6a..560d0cdd6156 100644
> --- a/drivers/gpu/drm/omapdrm/Kconfig
> +++ b/drivers/gpu/drm/omapdrm/Kconfig
> @@ -2,7 +2,7 @@
>   config DRM_OMAP
>   	tristate "OMAP DRM"
>   	depends on DRM
> -	depends on ARCH_OMAP2PLUS || ARCH_MULTIPLATFORM
> +	depends on ARCH_OMAP2PLUS || ARCH_MULTIPLATFORM || COMPILE_TEST
>   	select OMAP2_DSS
>   	select DRM_KMS_HELPER
>   	select VIDEOMODE_HELPERS
> 

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

  Tomi

[PATCH v2 6/9] drm/rcar-du: Enable COMPILE_TEST on all architectures

[Laurent Pinchart]

To extend test coverage, support COMPILE_TEST on all architectures by
dropping the ARM || ARM64 dependency. The dependency is a no-op when
COMPILE_TEST is not selected as ARCH_RENESAS can only be defined for ARM
or ARM64.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/gpu/drm/rcar-du/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index b47e74421e34..bce3a67f14d3 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -2,7 +2,6 @@
 config DRM_RCAR_DU
 	tristate "DRM Support for R-Car Display Unit"
 	depends on DRM && OF
-	depends on ARM || ARM64
 	depends on ARCH_RENESAS || COMPILE_TEST
 	imply DRM_RCAR_CMM
 	imply DRM_RCAR_LVDS
-- 
Regards,

Laurent Pinchart

[PATCH v2 7/9] drm/sti: Enable COMPILE_TEST on all architectures

[Laurent Pinchart]

To extend test coverage, relax the dependency on ARCH_STI or
ARCH_MULTIPLATFORM to also enable compilation with COMPILE_TEST.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v1:

- Enable COMPILE_TEST on all architectures
---
 drivers/gpu/drm/sti/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sti/Kconfig b/drivers/gpu/drm/sti/Kconfig
index d0cfdd36b38f..4c88785a95a8 100644
--- a/drivers/gpu/drm/sti/Kconfig
+++ b/drivers/gpu/drm/sti/Kconfig
@@ -1,7 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_STI
 	tristate "DRM Support for STMicroelectronics SoC stiH4xx Series"
-	depends on OF && DRM && (ARCH_STI || ARCH_MULTIPLATFORM)
+	depends on OF && DRM
+	depends on ARCH_STI || ARCH_MULTIPLATFORM || COMPILE_TEST
 	select RESET_CONTROLLER
 	select DRM_KMS_HELPER
 	select DRM_GEM_CMA_HELPER
-- 
Regards,

Laurent Pinchart

[PATCH v2 8/9] drm/tegra: Enable COMPILE_TEST on all architectures

[Laurent Pinchart]

To extend test coverage, support COMPILE_TEST on all architectures.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v1:

- Enable COMPILE_TEST on all architectures
---
 drivers/gpu/drm/tegra/Kconfig | 2 +-
 drivers/gpu/host1x/Kconfig    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig
index 5043dcaf1cf9..8eef9094d26a 100644
--- a/drivers/gpu/drm/tegra/Kconfig
+++ b/drivers/gpu/drm/tegra/Kconfig
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_TEGRA
 	tristate "NVIDIA Tegra DRM"
-	depends on ARCH_TEGRA || (ARM && COMPILE_TEST)
+	depends on ARCH_TEGRA || COMPILE_TEST
 	depends on COMMON_CLK
 	depends on DRM
 	depends on OF
diff --git a/drivers/gpu/host1x/Kconfig b/drivers/gpu/host1x/Kconfig
index 6dab94adf25e..977a0ac54e93 100644
--- a/drivers/gpu/host1x/Kconfig
+++ b/drivers/gpu/host1x/Kconfig
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config TEGRA_HOST1X
 	tristate "NVIDIA Tegra host1x driver"
-	depends on ARCH_TEGRA || (ARM && COMPILE_TEST)
+	depends on ARCH_TEGRA || COMPILE_TEST
 	select IOMMU_IOVA
 	help
 	  Driver for the NVIDIA Tegra host1x hardware.
-- 
Regards,

Laurent Pinchart

[PATCH v2 9/9] drm/tilcdc: Enable COMPILE_TEST on all ARM64 platforms

[Laurent Pinchart]

To extend test coverage, support COMPILE_TEST on ARM64 in addition to
ARM.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
 drivers/gpu/drm/tilcdc/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tilcdc/Kconfig b/drivers/gpu/drm/tilcdc/Kconfig
index 9f505a149990..37009f4ace9f 100644
--- a/drivers/gpu/drm/tilcdc/Kconfig
+++ b/drivers/gpu/drm/tilcdc/Kconfig
@@ -1,7 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_TILCDC
 	tristate "DRM Support for TI LCDC Display Controller"
-	depends on DRM && OF && ARM
+	depends on DRM && OF
+	depends on ARM || (ARM64 && COMPILE_TEST)
 	select DRM_KMS_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_GEM_CMA_HELPER
-- 
Regards,

Laurent Pinchart