Patch looks good to me.
Please find below some suggestions
On 7/15/2021 4:04 AM, Manasi Navare wrote:
Currently when we do the HW state readout, we dont set the shared dpll to NULL
for the bigjoiner slave which should not have a DPLL assigned. So it has
some garbage while the HW state readout is NULL. So explicitly reset
the shared dpll for bigjoiner slave pipe.
Bug: https://gitlab.freedesktop.org/drm/intel/-/issues/3465
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Tested-By: Swati Sharma <swati2.sharma@xxxxxxxxx>
checkpatch warning about tested-by tag.
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 65ddb6ca16e6..c274bfb8e549 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -9006,6 +9006,10 @@ verify_crtc_state(struct intel_crtc *crtc,
if (!new_crtc_state->hw.active)
return;
+ if (new_crtc_state->bigjoiner_slave)
+ /* No PLLs set for slave */
+ pipe_config->shared_dpll = NULL;
+
there is a check for bigjoiner_slave, couple of lines above this:
if (new_crtc_state->bigjoiner_slave)
master = new_crtc_state->bigjoiner_linked_crtc;
Perhaps it will make sense to club the set shared_dpll to NULL, along
with these lines.
In any case:
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
intel_pipe_config_sanity_check(dev_priv, pipe_config);
if (!intel_pipe_config_compare(new_crtc_state,
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