Re: [PATCH 06/10] drm/i915: Introduce intel_crtc_is_bigjoiner_{slave, master}()

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LGTM.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>

On 2/7/2022 1:01 PM, Ville Syrjälä wrote:
On Fri, Feb 04, 2022 at 01:27:54PM -0800, Navare, Manasi wrote:
On Thu, Feb 03, 2022 at 08:38:19PM +0200, Ville Syrjala wrote:
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

Introduce helpers to query whether the crtc is the slave/master
for bigjoiner. This decouples most places from the exact
state layout we use to track this relationship, allowing us
to change and extend it more easily.
So even with the bitmask approach, we still plan to have bools for bigjoiner_slave?
Nope. No longer necessary.

Performed with cocci:
@@
expression S, E;
@@
(
   S->bigjoiner_slave = E;
|
- S->bigjoiner_slave
+ intel_crtc_is_bigjoiner_slave(S)
)

@@
expression S, E;
@@
(
- E && S->bigjoiner && !intel_crtc_is_bigjoiner_slave(S)
+ E && intel_crtc_is_bigjoiner_master(S)
|
- S->bigjoiner && !intel_crtc_is_bigjoiner_slave(S)
+ intel_crtc_is_bigjoiner_master(S)
)

@@
expression S;
@@
- (intel_crtc_is_bigjoiner_master(S))
+ intel_crtc_is_bigjoiner_master(S)

@@
expression S, E1, E2, E3;
@@
- intel_crtc_is_bigjoiner_slave(S) ? E1 : S->bigjoiner ? E2 : E3
+ intel_crtc_is_bigjoiner_slave(S) ? E1 : intel_crtc_is_bigjoiner_master(S) ? E2 : E3

@@
typedef bool;
@@
+ bool intel_crtc_is_bigjoiner_slave(const struct intel_crtc_state *crtc_state)
+ {
+ 	return crtc_state->bigjoiner_slave;
+ }
+
   intel_master_crtc(...) {...}

@@
typedef bool;
@@
+ bool intel_crtc_is_bigjoiner_master(const struct intel_crtc_state *crtc_state)
+ {
+ 	return crtc_state->bigjoiner && !crtc_state->bigjoiner_slave;
+ }
+
   intel_master_crtc(...) {...}

@@
typedef bool;
identifier S;
@@
- bool is_trans_port_sync_mode(const struct intel_crtc_state *S);
+ bool is_trans_port_sync_mode(const struct intel_crtc_state *state);
+ bool intel_crtc_is_bigjoiner_slave(const struct intel_crtc_state *crtc_state);
+ bool intel_crtc_is_bigjoiner_master(const struct intel_crtc_state *crtc_state);
Is all of the above part of the commit message? Dont understand why its changing is_trans_port_sync_mode() ?
I had to touch that line to get coccinelle to actually do the
transformation. For some reason it refused to do anything if
I just tried to add the two new lines.




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