diff mbox series

[3/4] drm/i915: introduce INTEL_DISPLAY_ENABLED()

Message ID 076a8cde1a75d0c8254014fe0310da7deb8dc8d7.1567446845.git.jani.nikula@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: deconflate display disable from no display | expand

Commit Message

Jani Nikula Sept. 2, 2019, 6:08 p.m. UTC 
Prepare for making a distinction between not having display and having
disabled display. Add INTEL_DISPLAY_ENABLED() and use it where
HAS_DISPLAY() is used. This is initially duplication, as disabling
display still leads to ->pipe_mask = 0 and HAS_DISPLAY() being false.

Since INTEL_DISPLAY_ENABLED() will not make sense unless HAS_DISPLAY()
is true, include a warning for catching misuses making decisions on
INTEL_DISPLAY_ENABLED() when HAS_DISPLAY() is false.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c    | 2 +-
 drivers/gpu/drm/i915/display/intel_display.c | 4 ++--
 drivers/gpu/drm/i915/display/intel_fbdev.c   | 2 +-
 drivers/gpu/drm/i915/display/intel_gmbus.c   | 2 +-
 drivers/gpu/drm/i915/i915_drv.c              | 8 ++++----
 drivers/gpu/drm/i915/i915_drv.h              | 3 +++
 drivers/gpu/drm/i915/intel_pch.c             | 2 +-
 7 files changed, 13 insertions(+), 10 deletions(-)

Comments

Souza, Jose Sept. 5, 2019, midnight UTC | #1 
On Mon, 2019-09-02 at 21:08 +0300, Jani Nikula wrote:
> Prepare for making a distinction between not having display and
> having
> disabled display. Add INTEL_DISPLAY_ENABLED() and use it where
> HAS_DISPLAY() is used. This is initially duplication, as disabling
> display still leads to ->pipe_mask = 0 and HAS_DISPLAY() being false.
> 
> Since INTEL_DISPLAY_ENABLED() will not make sense unless
> HAS_DISPLAY()
> is true, include a warning for catching misuses making decisions on
> INTEL_DISPLAY_ENABLED() when HAS_DISPLAY() is false.
> 

Reviewed-by: José Roberto de Souza <jose.souza@intel.com>

> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: José Roberto de Souza <jose.souza@intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_bios.c    | 2 +-
>  drivers/gpu/drm/i915/display/intel_display.c | 4 ++--
>  drivers/gpu/drm/i915/display/intel_fbdev.c   | 2 +-
>  drivers/gpu/drm/i915/display/intel_gmbus.c   | 2 +-
>  drivers/gpu/drm/i915/i915_drv.c              | 8 ++++----
>  drivers/gpu/drm/i915/i915_drv.h              | 3 +++
>  drivers/gpu/drm/i915/intel_pch.c             | 2 +-
>  7 files changed, 13 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_bios.c
> b/drivers/gpu/drm/i915/display/intel_bios.c
> index efb39f350b19..1def550c68c8 100644
> --- a/drivers/gpu/drm/i915/display/intel_bios.c
> +++ b/drivers/gpu/drm/i915/display/intel_bios.c
> @@ -1833,7 +1833,7 @@ void intel_bios_init(struct drm_i915_private
> *dev_priv)
>  	const struct bdb_header *bdb;
>  	u8 __iomem *bios = NULL;
>  
> -	if (!HAS_DISPLAY(dev_priv)) {
> +	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
> {
>  		DRM_DEBUG_KMS("Skipping VBT init due to disabled
> display.\n");
>  		return;
>  	}
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index e480ffe0ae6e..c3bb18afe6d7 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -15324,7 +15324,7 @@ static void intel_setup_outputs(struct
> drm_i915_private *dev_priv)
>  
>  	intel_pps_init(dev_priv);
>  
> -	if (!HAS_DISPLAY(dev_priv))
> +	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
>  		return;
>  
>  	if (INTEL_GEN(dev_priv) >= 12) {
> @@ -17227,7 +17227,7 @@ intel_display_capture_error_state(struct
> drm_i915_private *dev_priv)
>  
>  	BUILD_BUG_ON(ARRAY_SIZE(transcoders) != ARRAY_SIZE(error-
> >transcoder));
>  
> -	if (!HAS_DISPLAY(dev_priv))
> +	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
>  		return NULL;
>  
>  	error = kzalloc(sizeof(*error), GFP_ATOMIC);
> diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c
> b/drivers/gpu/drm/i915/display/intel_fbdev.c
> index d59eee5c5d9c..68338669f054 100644
> --- a/drivers/gpu/drm/i915/display/intel_fbdev.c
> +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
> @@ -444,7 +444,7 @@ int intel_fbdev_init(struct drm_device *dev)
>  	struct intel_fbdev *ifbdev;
>  	int ret;
>  
> -	if (WARN_ON(!HAS_DISPLAY(dev_priv)))
> +	if (WARN_ON(!HAS_DISPLAY(dev_priv) ||
> !INTEL_DISPLAY_ENABLED(dev_priv)))
>  		return -ENODEV;
>  
>  	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
> diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c
> b/drivers/gpu/drm/i915/display/intel_gmbus.c
> index d6775a005726..3d4d19ac1d14 100644
> --- a/drivers/gpu/drm/i915/display/intel_gmbus.c
> +++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
> @@ -836,7 +836,7 @@ int intel_gmbus_setup(struct drm_i915_private
> *dev_priv)
>  	unsigned int pin;
>  	int ret;
>  
> -	if (!HAS_DISPLAY(dev_priv))
> +	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
>  		return 0;
>  
>  	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> diff --git a/drivers/gpu/drm/i915/i915_drv.c
> b/drivers/gpu/drm/i915/i915_drv.c
> index cad4d6ba2d2c..f7266d405978 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -338,7 +338,7 @@ static int i915_driver_modeset_probe(struct
> drm_device *dev)
>  	if (i915_inject_probe_failure(dev_priv))
>  		return -ENODEV;
>  
> -	if (HAS_DISPLAY(dev_priv)) {
> +	if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv)) {
>  		ret = drm_vblank_init(&dev_priv->drm,
>  				      INTEL_NUM_PIPES(dev_priv));
>  		if (ret)
> @@ -389,7 +389,7 @@ static int i915_driver_modeset_probe(struct
> drm_device *dev)
>  
>  	intel_overlay_setup(dev_priv);
>  
> -	if (!HAS_DISPLAY(dev_priv))
> +	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
>  		return 0;
>  
>  	ret = intel_fbdev_init(dev);
> @@ -1381,7 +1381,7 @@ static void i915_driver_register(struct
> drm_i915_private *dev_priv)
>  	} else
>  		DRM_ERROR("Failed to register driver for userspace
> access!\n");
>  
> -	if (HAS_DISPLAY(dev_priv)) {
> +	if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv)) {
>  		/* Must be done after probing outputs */
>  		intel_opregion_register(dev_priv);
>  		acpi_video_register();
> @@ -1405,7 +1405,7 @@ static void i915_driver_register(struct
> drm_i915_private *dev_priv)
>  	 * We need to coordinate the hotplugs with the asynchronous
> fbdev
>  	 * configuration, for which we use the fbdev->async_cookie.
>  	 */
> -	if (HAS_DISPLAY(dev_priv))
> +	if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv))
>  		drm_kms_helper_poll_init(dev);
>  
>  	intel_power_domains_enable(dev_priv);
> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> b/drivers/gpu/drm/i915/i915_drv.h
> index 6557cd8ddd7a..ee84370ff7c3 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2186,6 +2186,9 @@ IS_SUBPLATFORM(const struct drm_i915_private
> *i915,
>  
>  #define HAS_DISPLAY(dev_priv) (INTEL_INFO(dev_priv)->pipe_mask != 0)
>  
> +/* Only valid when HAS_DISPLAY() is true */
> +#define INTEL_DISPLAY_ENABLED(dev_priv)
> (WARN_ON(!HAS_DISPLAY(dev_priv)), !i915_modparams.disable_display)
> +
>  static inline bool intel_vtd_active(void)
>  {
>  #ifdef CONFIG_INTEL_IOMMU
> diff --git a/drivers/gpu/drm/i915/intel_pch.c
> b/drivers/gpu/drm/i915/intel_pch.c
> index fa864d8f2b73..111867569efd 100644
> --- a/drivers/gpu/drm/i915/intel_pch.c
> +++ b/drivers/gpu/drm/i915/intel_pch.c
> @@ -188,7 +188,7 @@ void intel_detect_pch(struct drm_i915_private
> *dev_priv)
>  	 * Use PCH_NOP (PCH but no South Display) for PCH platforms
> without
>  	 * display.
>  	 */
> -	if (pch && !HAS_DISPLAY(dev_priv)) {
> +	if (pch && (!HAS_DISPLAY(dev_priv) ||
> !INTEL_DISPLAY_ENABLED(dev_priv))) {
>  		DRM_DEBUG_KMS("Display disabled, reverting to NOP
> PCH\n");
>  		dev_priv->pch_type = PCH_NOP;
>  		dev_priv->pch_id = 0;
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index efb39f350b19..1def550c68c8 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -1833,7 +1833,7 @@  void intel_bios_init(struct drm_i915_private *dev_priv)
 	const struct bdb_header *bdb;
 	u8 __iomem *bios = NULL;
 
-	if (!HAS_DISPLAY(dev_priv)) {
+	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv)) {
 		DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n");
 		return;
 	}
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e480ffe0ae6e..c3bb18afe6d7 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -15324,7 +15324,7 @@  static void intel_setup_outputs(struct drm_i915_private *dev_priv)
 
 	intel_pps_init(dev_priv);
 
-	if (!HAS_DISPLAY(dev_priv))
+	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
 		return;
 
 	if (INTEL_GEN(dev_priv) >= 12) {
@@ -17227,7 +17227,7 @@  intel_display_capture_error_state(struct drm_i915_private *dev_priv)
 
 	BUILD_BUG_ON(ARRAY_SIZE(transcoders) != ARRAY_SIZE(error->transcoder));
 
-	if (!HAS_DISPLAY(dev_priv))
+	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
 		return NULL;
 
 	error = kzalloc(sizeof(*error), GFP_ATOMIC);
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index d59eee5c5d9c..68338669f054 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -444,7 +444,7 @@  int intel_fbdev_init(struct drm_device *dev)
 	struct intel_fbdev *ifbdev;
 	int ret;
 
-	if (WARN_ON(!HAS_DISPLAY(dev_priv)))
+	if (WARN_ON(!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv)))
 		return -ENODEV;
 
 	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c b/drivers/gpu/drm/i915/display/intel_gmbus.c
index d6775a005726..3d4d19ac1d14 100644
--- a/drivers/gpu/drm/i915/display/intel_gmbus.c
+++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
@@ -836,7 +836,7 @@  int intel_gmbus_setup(struct drm_i915_private *dev_priv)
 	unsigned int pin;
 	int ret;
 
-	if (!HAS_DISPLAY(dev_priv))
+	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
 		return 0;
 
 	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index cad4d6ba2d2c..f7266d405978 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -338,7 +338,7 @@  static int i915_driver_modeset_probe(struct drm_device *dev)
 	if (i915_inject_probe_failure(dev_priv))
 		return -ENODEV;
 
-	if (HAS_DISPLAY(dev_priv)) {
+	if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv)) {
 		ret = drm_vblank_init(&dev_priv->drm,
 				      INTEL_NUM_PIPES(dev_priv));
 		if (ret)
@@ -389,7 +389,7 @@  static int i915_driver_modeset_probe(struct drm_device *dev)
 
 	intel_overlay_setup(dev_priv);
 
-	if (!HAS_DISPLAY(dev_priv))
+	if (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))
 		return 0;
 
 	ret = intel_fbdev_init(dev);
@@ -1381,7 +1381,7 @@  static void i915_driver_register(struct drm_i915_private *dev_priv)
 	} else
 		DRM_ERROR("Failed to register driver for userspace access!\n");
 
-	if (HAS_DISPLAY(dev_priv)) {
+	if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv)) {
 		/* Must be done after probing outputs */
 		intel_opregion_register(dev_priv);
 		acpi_video_register();
@@ -1405,7 +1405,7 @@  static void i915_driver_register(struct drm_i915_private *dev_priv)
 	 * We need to coordinate the hotplugs with the asynchronous fbdev
 	 * configuration, for which we use the fbdev->async_cookie.
 	 */
-	if (HAS_DISPLAY(dev_priv))
+	if (HAS_DISPLAY(dev_priv) && INTEL_DISPLAY_ENABLED(dev_priv))
 		drm_kms_helper_poll_init(dev);
 
 	intel_power_domains_enable(dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6557cd8ddd7a..ee84370ff7c3 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2186,6 +2186,9 @@  IS_SUBPLATFORM(const struct drm_i915_private *i915,
 
 #define HAS_DISPLAY(dev_priv) (INTEL_INFO(dev_priv)->pipe_mask != 0)
 
+/* Only valid when HAS_DISPLAY() is true */
+#define INTEL_DISPLAY_ENABLED(dev_priv) (WARN_ON(!HAS_DISPLAY(dev_priv)), !i915_modparams.disable_display)
+
 static inline bool intel_vtd_active(void)
 {
 #ifdef CONFIG_INTEL_IOMMU
diff --git a/drivers/gpu/drm/i915/intel_pch.c b/drivers/gpu/drm/i915/intel_pch.c
index fa864d8f2b73..111867569efd 100644
--- a/drivers/gpu/drm/i915/intel_pch.c
+++ b/drivers/gpu/drm/i915/intel_pch.c
@@ -188,7 +188,7 @@  void intel_detect_pch(struct drm_i915_private *dev_priv)
 	 * Use PCH_NOP (PCH but no South Display) for PCH platforms without
 	 * display.
 	 */
-	if (pch && !HAS_DISPLAY(dev_priv)) {
+	if (pch && (!HAS_DISPLAY(dev_priv) || !INTEL_DISPLAY_ENABLED(dev_priv))) {
 		DRM_DEBUG_KMS("Display disabled, reverting to NOP PCH\n");
 		dev_priv->pch_type = PCH_NOP;
 		dev_priv->pch_id = 0;