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drm/i915: Move hotplug inversion logic into separate helper 

Use *_hpd_invert() helpers whenever possible to isolate logic specific
to hotplug inversion from common HPD setup logic to improve readability
and maintainability of the source code.

While we only define dg1_hpd_invert() here, future platforms are likely
to have different hotplug inversion needs, thus it makes sense grouping
different implementations under a common suffix.

v2: Fix coding style and prefer to use small *_hdp_invert() helpers
    instead of a generic one.

CC: Jani Nikula <jani.nikula@linux.intel.com>
CC: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220922164949.163985-1-gustavo.sousa@intel.com
This commit is contained in:
Gustavo Sousa 2022-09-22 13:49:49 -03:00 committed by Lucas De Marchi
parent 8146d588bf
commit 71690148db
1 changed files with 10 additions and 9 deletions
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19
drivers/gpu/drm/i915/i915_irq.c
View File

@ -3411,17 +3411,18 @@ static u32 gen11_hotplug_enables(struct drm_i915_private *i915,
}
}
static void dg1_hpd_invert(struct drm_i915_private *i915)
{
u32 val = (INVERT_DDIA_HPD |
INVERT_DDIB_HPD |
INVERT_DDIC_HPD |
INVERT_DDID_HPD);
intel_uncore_rmw(&i915->uncore, SOUTH_CHICKEN1, 0, val);
}
static void dg1_hpd_irq_setup(struct drm_i915_private *dev_priv)
{
u32 val;
val = intel_uncore_read(&dev_priv->uncore, SOUTH_CHICKEN1);
val |= (INVERT_DDIA_HPD |
INVERT_DDIB_HPD |
INVERT_DDIC_HPD |
INVERT_DDID_HPD);
intel_uncore_write(&dev_priv->uncore, SOUTH_CHICKEN1, val);
dg1_hpd_invert(dev_priv);
icp_hpd_irq_setup(dev_priv);
}