diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2023-03-20 11:05:21 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2023-03-24 23:56:35 +0200 |
| commit | c5de248484afeb6de259239a23645790038d9df3 (patch) | |
| tree | 828a96a5142a3edcbff126f601e9c5d23c4f447d /drivers/gpu/drm/i915/display/intel_dpt.c | |
| parent | 5a08585d38d66dd64b8ae22229bdfae3fdc1ef3e (diff) | |
drm/i915/dpt: Add a modparam to disable DPT via the chicken bit
Add i915.enable_dpt modparam to allow disabling the DPT
usage in hardware via the chicken bit. Useful when debugging
potential DPT issues.
Quickly smoke tested on ADL.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230320090522.9909-6-ville.syrjala@linux.intel.com
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dpt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dpt.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dpt.c b/drivers/gpu/drm/i915/display/intel_dpt.c index 2a9f40a2b3ed..2bf5cce232d5 100644 --- a/drivers/gpu/drm/i915/display/intel_dpt.c +++ b/drivers/gpu/drm/i915/display/intel_dpt.c @@ -9,6 +9,8 @@ #include "gt/gen8_ppgtt.h" #include "i915_drv.h" +#include "i915_reg.h" +#include "intel_de.h" #include "intel_display_types.h" #include "intel_dpt.h" #include "intel_fb.h" @@ -313,3 +315,22 @@ void intel_dpt_destroy(struct i915_address_space *vm) dpt->obj->is_dpt = false; i915_vm_put(&dpt->vm); } + +void intel_dpt_configure(struct intel_crtc *crtc) +{ + struct drm_i915_private *i915 = to_i915(crtc->base.dev); + + if (DISPLAY_VER(i915) == 14) { + enum pipe pipe = crtc->pipe; + enum plane_id plane_id; + + for_each_plane_id_on_crtc(crtc, plane_id) + intel_de_rmw(i915, PLANE_CHICKEN(pipe, plane_id), + PLANE_CHICKEN_DISABLE_DPT, + i915->params.enable_dpt ? 0 : PLANE_CHICKEN_DISABLE_DPT); + } else if (DISPLAY_VER(i915) == 13) { + intel_de_rmw(i915, CHICKEN_MISC_2, + CHICKEN_MISC_DISABLE_DPT, + i915->params.enable_dpt ? 0 : CHICKEN_MISC_DISABLE_DPT); + } +} |