On Fri, 13 Sep 2019, Jani Nikula <jani.nikula@xxxxxxxxx> 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 after intel_device_info_runtime_init(). This is
> initially duplication, as disabling display still leads to ->pipe_mask =
> 0 and HAS_DISPLAY() being false.
>
> Note that ever since i915.display_disable was introduced, it has not
> affected PCH detection even if it uses HAS_DISPLAY(), as display disable
> happens after that.
>
> 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.
>
> v2: Remove INTEL_DISPLAY_ENABLED() check from intel_detect_pch() (Chris)
Pushed, thanks for the review.
BR,
Jani.
>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Reviewed-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> Acked-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> 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 +++
> 6 files changed, 12 insertions(+), 9 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 a19f8c73f2e0..2c0cb32235c0 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -15366,7 +15366,7 @@ 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) {
> @@ -17273,7 +17273,7 @@ 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 0dfcb40f3162..9904f762f4bb 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);
> @@ -1378,7 +1378,7 @@ 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();
> @@ -1401,7 +1401,7 @@ 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 bf600888b3f1..4faec2f94e19 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2192,6 +2192,9 @@ 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
--
Jani Nikula, Intel Open Source Graphics Center
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