diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-06-11 16:33:41 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-06-20 15:40:01 +0300 |
| commit | 7562c88be8acf3898cd5d35cb5e83611139636f1 (patch) | |
| tree | da7e493c2e704349acba6e1dd4f13bb199d417fa /drivers/gpu/drm/i915/display | |
| parent | 4a74de91056d640aa6b4025fc01330313ce22fdc (diff) | |
drm/i915/dsb: Add i915.enable_dsb module parameter
As we extend the use of DSB for critical pipe/plane register
programming, it'll be nice to have an escape valve at hand,
in case things go very poorly. To that end, add a i915.enable_dsb
modparam by which we can force the driver to take the pure mmio
path instead.
v2: Use 0400 permissions for the actual modparam (Jani)
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611133344.30673-9-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/display')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_params.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_params.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 3 |
3 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_params.c b/drivers/gpu/drm/i915/display/intel_display_params.c index 79107607a6ff..e82bd72d32fa 100644 --- a/drivers/gpu/drm/i915/display/intel_display_params.c +++ b/drivers/gpu/drm/i915/display/intel_display_params.c @@ -54,6 +54,9 @@ intel_display_param_named_unsafe(enable_dc, int, 0400, intel_display_param_named_unsafe(enable_dpt, bool, 0400, "Enable display page table (DPT) (default: true)"); +intel_display_param_named_unsafe(enable_dsb, bool, 0400, + "Enable display state buffer (DSB) (default: true)"); + intel_display_param_named_unsafe(enable_sagv, bool, 0400, "Enable system agent voltage/frequency scaling (SAGV) (default: true)"); diff --git a/drivers/gpu/drm/i915/display/intel_display_params.h b/drivers/gpu/drm/i915/display/intel_display_params.h index 1208a62c16d2..48c29c55c939 100644 --- a/drivers/gpu/drm/i915/display/intel_display_params.h +++ b/drivers/gpu/drm/i915/display/intel_display_params.h @@ -31,6 +31,7 @@ struct drm_i915_private; param(int, vbt_sdvo_panel_type, -1, 0400) \ param(int, enable_dc, -1, 0400) \ param(bool, enable_dpt, true, 0400) \ + param(bool, enable_dsb, true, 0600) \ param(bool, enable_sagv, true, 0600) \ param(int, disable_power_well, -1, 0400) \ param(bool, enable_ips, true, 0600) \ diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index bee48ac419ce..2ab3765f6c06 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -460,6 +460,9 @@ struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state, if (!HAS_DSB(i915)) return NULL; + if (!i915->display.params.enable_dsb) + return NULL; + /* TODO: DSB is broken in Xe KMD, so disabling it until fixed */ if (!IS_ENABLED(I915)) return NULL; |