To reduce noise on CI checkpatch reports, we want to silence some
checkpatch warnings. Different branches may end up having different
rules, and users may want to get unfiltered results, so introduce
checkpatch profiles. Add some placeholder profiles to be filled later
on.

The idea is that CI would run 'dim checkpatch HEAD^ drm-intel' (or some
other commit range-ish as the case may be).

Cc: Arkadiusz Hiler <arkadiusz.hi...@intel.com>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
 dim     | 46 +++++++++++++++++++++++++++++++++++++++++-----
 dim.rst |  9 +++++++--
 2 files changed, 48 insertions(+), 7 deletions(-)

diff --git a/dim b/dim
index 81e2bc1511ac..4ba1c7ff490a 100755
--- a/dim
+++ b/dim
@@ -836,7 +836,7 @@ function apply_patch #patch_file
                rv=1
        fi
 
-       if ! checkpatch_commit HEAD; then
+       if ! checkpatch_commit HEAD branch; then
                rv=1
        fi
        if ! check_maintainer $branch HEAD; then
@@ -1358,12 +1358,47 @@ function check_maintainer
 }
 
 # $1 is the git sha1 to check
+# $2 is the checkpatch profile
 function checkpatch_commit
 {
-       local commit rv checkpatch_options
+       local commit rv checkpatch_options profile profile_options
 
        commit=$1
-       checkpatch_options="-q --emacs --strict --show-types -"
+       profile=${2:-default}
+
+       # special branch profile maps branches to profiles
+       if [[ "$profile" = "branch" ]]; then
+               case "$(git_current_branch)" in
+                       
drm-intel-next-queued|drm-intel-next-fixes|drm-intel-fixes)
+                               profile=drm-intel
+                               ;;
+                       drm-misc-next|drm-misc-next-fixes|drm-misc-fixes)
+                               profile=drm-misc
+                               ;;
+                       *)
+                               profile=default
+                               ;;
+               esac
+       fi
+
+       # map profiles to checkpatch options
+       case "$profile" in
+               default)
+                       profile_options=""
+                       ;;
+               drm-misc)
+                       profile_options=""
+                       ;;
+               drm-intel)
+                       profile_options=""
+                       ;;
+               *)
+                       echoerr "Unknown checkpatch profile $profile"
+                       profile_options=""
+                       ;;
+       esac
+
+       checkpatch_options="-q --emacs --strict --show-types $profile_options -"
 
        git --no-pager log --oneline -1 $commit
        if ! git show --pretty=email $commit |\
@@ -1430,12 +1465,13 @@ function dim_extract_next_fixes
 dim_alias_cp=checkpatch
 function dim_checkpatch
 {
-       local range rv
+       local range profile rv
 
        range=$(rangeish "${1:-}")
+       profile=${2:-}
 
        for commit in $(git rev-list --reverse $range); do
-               if ! checkpatch_commit $commit; then
+               if ! checkpatch_commit $commit $profile; then
                        rv=1
                fi
        done
diff --git a/dim.rst b/dim.rst
index e2c5fd6e6d0a..cc930959e497 100644
--- a/dim.rst
+++ b/dim.rst
@@ -130,13 +130,18 @@ fixes *commit-ish*
 Print the Fixes: and Cc: lines for the supplied *commit-ish* in the linux 
kernel
 CodingStyle approved format.
 
-checkpatch [*commit-ish* [.. *commit-ish*]]
--------------------------------------------
+checkpatch [*commit-ish* [.. *commit-ish*]] [*profile*]
+-------------------------------------------------------
 Runs the given commit range commit-ish..commit-ish through the check tools.
 
 If no commit-ish is passed, defaults to HEAD^..HEAD. If one commit-ish is 
passed
 instead of a range, the range commit-ish..HEAD is used.
 
+If profile is given, uses specific options for checkpatch error
+filtering. Current profiles are "default", "branch", "drm-intel", and
+"drm-misc". The "branch" profile maps the current git branch to the appropriate
+profile, or if the branch is not known, to "default".
+
 sparse [*commit-ish* [.. *commit-ish*]]
 ---------------------------------------
 Run sparse on the files changed by the given commit range.
-- 
2.11.0

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