[PATCH] drm/amd/display: Fix unused variable warning

[PATCH] drm/amd/display: Fix unused variable warning

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

Some of the newly added code is hidden inside of #ifdef
blocks, but one variable is unused when debugfs is disabled:

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:8370:8: error: unused variable 'configure_crc' [-Werror,-Wunused-variable]

Change the #ifdef to an if(IS_ENABLED()) check to fix the warning
and avoid adding more #ifdefs.

Fixes: c920888c604d ("drm/amd/display: Expose new CRC window property")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c     | 4 +---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h | 2 +-
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 42b0fdb72e7b..5071b55ad0f6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8379,8 +8379,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 			acrtc->dm_irq_params.stream = dm_new_crtc_state->stream;
 			manage_dm_interrupts(adev, acrtc, true);
 		}
-#ifdef CONFIG_DEBUG_FS
-		if (new_crtc_state->active &&
+		if (IS_ENABLED(CONFIG_DEBUG_FS) && new_crtc_state->active &&
 			amdgpu_dm_is_valid_crc_source(dm_new_crtc_state->crc_src)) {
 			/**
 			 * Frontend may have changed so reapply the CRC capture
@@ -8401,7 +8400,6 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 				amdgpu_dm_crtc_configure_crc_source(
 					crtc, dm_new_crtc_state, dm_new_crtc_state->crc_src);
 		}
-#endif
 	}
 
 	for_each_new_crtc_in_state(state, crtc, new_crtc_state, j)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
index 0235bfb246e5..eba2f1d35d07 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
@@ -46,13 +46,13 @@ static inline bool amdgpu_dm_is_valid_crc_source(enum amdgpu_dm_pipe_crc_source
 }
 
 /* amdgpu_dm_crc.c */
-#ifdef CONFIG_DEBUG_FS
 bool amdgpu_dm_crc_window_is_default(struct dm_crtc_state *dm_crtc_state);
 bool amdgpu_dm_crc_window_changed(struct dm_crtc_state *dm_new_crtc_state,
 					struct dm_crtc_state *dm_old_crtc_state);
 int amdgpu_dm_crtc_configure_crc_source(struct drm_crtc *crtc,
 					struct dm_crtc_state *dm_crtc_state,
 					enum amdgpu_dm_pipe_crc_source source);
+#ifdef CONFIG_DEBUG_FS
 int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name);
 int amdgpu_dm_crtc_verify_crc_source(struct drm_crtc *crtc,
 				     const char *src_name,
-- 
2.29.2

RE: [PATCH] drm/amd/display: Fix unused variable warning

[Lin, Wayne]

[AMD Official Use Only - Internal Distribution Only]

Thanks Arnd.

Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>

-----Original Message-----
From: Arnd Bergmann <arnd@kernel.org>
Sent: Sunday, January 3, 2021 10:03 PM
To: Wentland, Harry <Harry.Wentland@amd.com>; Li, Sun peng (Leo) <Sunpeng.Li@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>; David Airlie <airlied@linux.ie>; Daniel Vetter <daniel@ffwll.ch>; R, Bindu <Bindu.R@amd.com>; Lin, Wayne <Wayne.Lin@amd.com>
Cc: Arnd Bergmann <arnd@arndb.de>; Kazlauskas, Nicholas <Nicholas.Kazlauskas@amd.com>; Siqueira, Rodrigo <Rodrigo.Siqueira@amd.com>; Pillai, Aurabindo <Aurabindo.Pillai@amd.com>; Wang, Chao-kai (Stylon) <Stylon.Wang@amd.com>; Simon Ser <contact@emersion.fr>; Brol, Eryk <Eryk.Brol@amd.com>; Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>; Lakha, Bhawanpreet <Bhawanpreet.Lakha@amd.com>; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org
Subject: [PATCH] drm/amd/display: Fix unused variable warning

From: Arnd Bergmann <arnd@arndb.de>

Some of the newly added code is hidden inside of #ifdef blocks, but one variable is unused when debugfs is disabled:

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:8370:8: error: unused variable 'configure_crc' [-Werror,-Wunused-variable]

Change the #ifdef to an if(IS_ENABLED()) check to fix the warning and avoid adding more #ifdefs.

Fixes: c920888c604d ("drm/amd/display: Expose new CRC window property")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c     | 4 +---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h | 2 +-
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 42b0fdb72e7b..5071b55ad0f6 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8379,8 +8379,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 acrtc->dm_irq_params.stream = dm_new_crtc_state->stream;
 manage_dm_interrupts(adev, acrtc, true);
 }
-#ifdef CONFIG_DEBUG_FS
-if (new_crtc_state->active &&
+if (IS_ENABLED(CONFIG_DEBUG_FS) && new_crtc_state->active &&
 amdgpu_dm_is_valid_crc_source(dm_new_crtc_state->crc_src)) {
 /**
  * Frontend may have changed so reapply the CRC capture @@ -8401,7 +8400,6 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 amdgpu_dm_crtc_configure_crc_source(
 crtc, dm_new_crtc_state, dm_new_crtc_state->crc_src);
 }
-#endif
 }

 for_each_new_crtc_in_state(state, crtc, new_crtc_state, j) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
index 0235bfb246e5..eba2f1d35d07 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
@@ -46,13 +46,13 @@ static inline bool amdgpu_dm_is_valid_crc_source(enum amdgpu_dm_pipe_crc_source  }

 /* amdgpu_dm_crc.c */
-#ifdef CONFIG_DEBUG_FS
 bool amdgpu_dm_crc_window_is_default(struct dm_crtc_state *dm_crtc_state);  bool amdgpu_dm_crc_window_changed(struct dm_crtc_state *dm_new_crtc_state,
 struct dm_crtc_state *dm_old_crtc_state);  int amdgpu_dm_crtc_configure_crc_source(struct drm_crtc *crtc,
 struct dm_crtc_state *dm_crtc_state,
 enum amdgpu_dm_pipe_crc_source source);
+#ifdef CONFIG_DEBUG_FS
 int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name);  int amdgpu_dm_crtc_verify_crc_source(struct drm_crtc *crtc,
      const char *src_name,
--
2.29.2

Re: [PATCH] drm/amd/display: Fix unused variable warning

[Alex Deucher]

Applied.  Thanks!

Alex

On Mon, Jan 4, 2021 at 7:58 AM Lin, Wayne <Wayne.Lin@amd.com> wrote:
>
> [AMD Official Use Only - Internal Distribution Only]
>
> Thanks Arnd.
>
> Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
>
> -----Original Message-----
> From: Arnd Bergmann <arnd@kernel.org>
> Sent: Sunday, January 3, 2021 10:03 PM
> To: Wentland, Harry <Harry.Wentland@amd.com>; Li, Sun peng (Leo) <Sunpeng.Li@amd.com>; Deucher, Alexander <Alexander.Deucher@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>; David Airlie <airlied@linux.ie>; Daniel Vetter <daniel@ffwll.ch>; R, Bindu <Bindu.R@amd.com>; Lin, Wayne <Wayne.Lin@amd.com>
> Cc: Arnd Bergmann <arnd@arndb.de>; Kazlauskas, Nicholas <Nicholas.Kazlauskas@amd.com>; Siqueira, Rodrigo <Rodrigo.Siqueira@amd.com>; Pillai, Aurabindo <Aurabindo.Pillai@amd.com>; Wang, Chao-kai (Stylon) <Stylon.Wang@amd.com>; Simon Ser <contact@emersion.fr>; Brol, Eryk <Eryk.Brol@amd.com>; Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>; Lakha, Bhawanpreet <Bhawanpreet.Lakha@amd.com>; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org
> Subject: [PATCH] drm/amd/display: Fix unused variable warning
>
> From: Arnd Bergmann <arnd@arndb.de>
>
> Some of the newly added code is hidden inside of #ifdef blocks, but one variable is unused when debugfs is disabled:
>
> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:8370:8: error: unused variable 'configure_crc' [-Werror,-Wunused-variable]
>
> Change the #ifdef to an if(IS_ENABLED()) check to fix the warning and avoid adding more #ifdefs.
>
> Fixes: c920888c604d ("drm/amd/display: Expose new CRC window property")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c     | 4 +---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h | 2 +-
>  2 files changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 42b0fdb72e7b..5071b55ad0f6 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -8379,8 +8379,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
>  acrtc->dm_irq_params.stream = dm_new_crtc_state->stream;
>  manage_dm_interrupts(adev, acrtc, true);
>  }
> -#ifdef CONFIG_DEBUG_FS
> -if (new_crtc_state->active &&
> +if (IS_ENABLED(CONFIG_DEBUG_FS) && new_crtc_state->active &&
>  amdgpu_dm_is_valid_crc_source(dm_new_crtc_state->crc_src)) {
>  /**
>   * Frontend may have changed so reapply the CRC capture @@ -8401,7 +8400,6 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
>  amdgpu_dm_crtc_configure_crc_source(
>  crtc, dm_new_crtc_state, dm_new_crtc_state->crc_src);
>  }
> -#endif
>  }
>
>  for_each_new_crtc_in_state(state, crtc, new_crtc_state, j) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
> index 0235bfb246e5..eba2f1d35d07 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
> @@ -46,13 +46,13 @@ static inline bool amdgpu_dm_is_valid_crc_source(enum amdgpu_dm_pipe_crc_source  }
>
>  /* amdgpu_dm_crc.c */
> -#ifdef CONFIG_DEBUG_FS
>  bool amdgpu_dm_crc_window_is_default(struct dm_crtc_state *dm_crtc_state);  bool amdgpu_dm_crc_window_changed(struct dm_crtc_state *dm_new_crtc_state,
>  struct dm_crtc_state *dm_old_crtc_state);  int amdgpu_dm_crtc_configure_crc_source(struct drm_crtc *crtc,
>  struct dm_crtc_state *dm_crtc_state,
>  enum amdgpu_dm_pipe_crc_source source);
> +#ifdef CONFIG_DEBUG_FS
>  int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name);  int amdgpu_dm_crtc_verify_crc_source(struct drm_crtc *crtc,
>       const char *src_name,
> --
> 2.29.2
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

[PATCH] drm/amd/display: fix unused variable warning

[Arnd Bergmann]

From: Arnd Bergmann <arnd@arndb.de>

After all users of the 'dm' warnings got hidden in an #ifdef,
the compiler started warning about it being unused:

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5380:33: error: unused variable 'dm' [-Werror,-Wunused-variable]

Add another such #ifdef.

Fixes: 98ab5f3513f9 ("drm/amd/display: Fix deadlock during gpu reset v3")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index a90dc4d31c32..37bf2dd87e1e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5377,7 +5377,9 @@ static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
 	struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
 	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
 	struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
+#if defined(CONFIG_DRM_AMD_DC_DCN)
 	struct amdgpu_display_manager *dm = &adev->dm;
+#endif
 	int rc = 0;
 
 	if (enable) {
-- 
2.29.2

Re: [PATCH] drm/amd/display: fix unused variable warning

[Harry Wentland]

On 2021-01-25 7:48 a.m., Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> After all users of the 'dm' warnings got hidden in an #ifdef,
> the compiler started warning about it being unused:
> 
> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:5380:33: error: unused variable 'dm' [-Werror,-Wunused-variable]
> 
> Add another such #ifdef.
> 
> Fixes: 98ab5f3513f9 ("drm/amd/display: Fix deadlock during gpu reset v3")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Harry Wentland <harry.wentland@amd.com>

Harry

> ---
>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index a90dc4d31c32..37bf2dd87e1e 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -5377,7 +5377,9 @@ static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
>   	struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
>   	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
>   	struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>   	struct amdgpu_display_manager *dm = &adev->dm;
> +#endif
>   	int rc = 0;
>   
>   	if (enable) {
>