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authorTomas Winkler <tomas.winkler@intel.com>2022-09-27 17:41:36 -0700
committerDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>2022-10-03 11:29:12 -0700
commitbd58904a328fe53a5b8b8f03127c98b072e0986d (patch)
tree19806417aa46740f9f238514dd93ab84944b08ba /drivers/misc/mei
parentc72891256a8068a4c6e335f3e6944e53539230bb (diff)
downloadlinux-bd58904a328fe53a5b8b8f03127c98b072e0986d.tar.bz2
mei: pxp: support matching with a gfx discrete card
With on-boards graphics card, both i915 and MEI are in the same device hierarchy with the same parent, while for discrete gfx card the MEI is its child device. Adjust the match function for that scenario by matching MEI parent device with i915. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Vitaly Lubart <vitaly.lubart@intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://patchwork.freedesktop.org/patch/msgid/20220928004145.745803-7-daniele.ceraolospurio@intel.com
Diffstat (limited to 'drivers/misc/mei')
-rw-r--r--drivers/misc/mei/pxp/mei_pxp.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/misc/mei/pxp/mei_pxp.c b/drivers/misc/mei/pxp/mei_pxp.c
index f221464c4009..8dd09b1722eb 100644
--- a/drivers/misc/mei/pxp/mei_pxp.c
+++ b/drivers/misc/mei/pxp/mei_pxp.c
@@ -156,17 +156,24 @@ static int mei_pxp_component_match(struct device *dev, int subcomponent,
{
struct device *base = data;
+ if (!dev)
+ return 0;
+
if (!dev->driver || strcmp(dev->driver->name, "i915") ||
subcomponent != I915_COMPONENT_PXP)
return 0;
base = base->parent;
- if (!base)
+ if (!base) /* mei device */
return 0;
- base = base->parent;
- dev = dev->parent;
+ base = base->parent; /* pci device */
+ /* for dgfx */
+ if (base && dev == base)
+ return 1;
+ /* for pch */
+ dev = dev->parent;
return (base && dev && dev == base);
}