On 9/6/2024 10:09 PM, Ville Syrjälä wrote:
On Fri, Sep 06, 2024 at 07:30:16PM +0300, Ville Syrjälä wrote:
On Fri, Sep 06, 2024 at 06:28:03PM +0530, Ankit Nautiyal wrote:
From: Stanislav Lisovskiy <[email protected]>
Add changes to DSC which are required for Ultrajoiner.
v2:
-Use correct helper for setting bits for bigjoiner secondary. (Ankit)
-Use enum for joiner pipe count instead magic numbers. (Suraj)
-Use primary/secondary instead of master/slave. (Suraj)
Signed-off-by: Stanislav Lisovskiy <[email protected]>
Signed-off-by: Ankit Nautiyal <[email protected]>
---
drivers/gpu/drm/i915/display/intel_vdsc.c | 26 +++++++++++++++++++++--
1 file changed, 24 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c
b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 8158e3702ed5..66e810c8de68 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -379,9 +379,11 @@ static int intel_dsc_get_vdsc_per_pipe(const struct
intel_crtc_state *crtc_state
int intel_dsc_get_num_vdsc_instances(const struct intel_crtc_state
*crtc_state)
{
int num_vdsc_instances = intel_dsc_get_vdsc_per_pipe(crtc_state);
+ int joined_pipes = intel_joiner_num_pipes(crtc_state);
- if (crtc_state->joiner_pipes)
- num_vdsc_instances *= 2;
+ if (joined_pipes == INTEL_BIG_JOINER_PIPES ||
+ joined_pipes == INTEL_ULTRA_JOINER_PIPES)
+ num_vdsc_instances *= joined_pipes;
return num_vdsc_instances;
}
@@ -751,6 +753,14 @@ void intel_uncompressed_joiner_enable(const struct
intel_crtc_state *crtc_state)
}
}
+static bool intel_crtc_ultrajoiner_enable_needed(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+ return intel_joiner_num_pipes(crtc_state) == INTEL_ULTRA_JOINER_PIPES &&
+ crtc->pipe != PIPE_D;
+}
+
void intel_dsc_enable(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -770,7 +780,19 @@ void intel_dsc_enable(const struct intel_crtc_state
*crtc_state)
dss_ctl1_val |= JOINER_ENABLE;
}
if (crtc_state->joiner_pipes) {
+ /*
+ * This bit doesn't seem to follow primary/secondary logic or
+ * any other logic, so lets just add helper function to
+ * at least hide this hassle..
+ */
+ if (intel_crtc_ultrajoiner_enable_needed(crtc_state))
What is this crazyness? This would throw a big wrench into
the works, eg. the ultrajoiner readout would not work as intended.
Hmm. I do see a note to this effect in bspec. But that doesn't make
any real sense. I would expect that we either enable this for
everything, or only for pipes A+C (the bigjoiner primaries).
The latter would seem sensible, but it would also mean that
we need to rethink the readout as well.
Yes as per bspec : The ULTRA_JOINER_ENABLE bit will be set for Pipe A,
Pipe B and Pipe C only.
Are you suggesting to write this for D as well? or just for A and C?
Also PRIMARY_ULTRA_JOINER_ENABLE is to be set for A. For other pipes
this bit will be reset.
Though only C is ultrajoiner secondary pipe, but since for other pipes
this bit is reset, how to make that distinction between C and others.
I mean readout will tell ultrajoiner primary as A and ultrajoiner
secondary as B,C,D as bit is reset for all three.
Currently we have secondary ultrajoiner pipes reading 0xE.
Regards,
Ankit
+ dss_ctl1_val |= ULTRA_JOINER_ENABLE;
+
+ if (intel_crtc_is_ultrajoiner_primary(crtc_state))
+ dss_ctl1_val |= PRIMARY_ULTRA_JOINER_ENABLE;
+
dss_ctl1_val |= BIG_JOINER_ENABLE;
+
if (intel_crtc_is_bigjoiner_primary(crtc_state))
dss_ctl1_val |= PRIMARY_BIG_JOINER_ENABLE;
}
--
2.45.2
--
Ville Syrjälä
Intel
