On Mon, 27 Mar 2023, Ville Syrjala <[email protected]> wrote: > From: Ville Syrjälä <[email protected]> > > Similar to FBC let's expose an debugfs file to control > IPS false color. Enabling this provides an immediate visual > feedback on whether IPS is working or not. > > Signed-off-by: Ville Syrjälä <[email protected]>
Reviewed-by: Jani Nikula <[email protected]> > --- > drivers/gpu/drm/i915/display/hsw_ips.c | 58 ++++++++++++++++++- > .../gpu/drm/i915/display/intel_display_core.h | 4 ++ > drivers/gpu/drm/i915/i915_reg.h | 3 +- > 3 files changed, 62 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/hsw_ips.c > b/drivers/gpu/drm/i915/display/hsw_ips.c > index 47209c858c32..8eca0de065b6 100644 > --- a/drivers/gpu/drm/i915/display/hsw_ips.c > +++ b/drivers/gpu/drm/i915/display/hsw_ips.c > @@ -14,6 +14,7 @@ static void hsw_ips_enable(const struct intel_crtc_state > *crtc_state) > { > struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); > struct drm_i915_private *i915 = to_i915(crtc->base.dev); > + u32 val; > > if (!crtc_state->ips_enabled) > return; > @@ -26,10 +27,15 @@ static void hsw_ips_enable(const struct intel_crtc_state > *crtc_state) > drm_WARN_ON(&i915->drm, > !(crtc_state->active_planes & ~BIT(PLANE_CURSOR))); > > + val = IPS_ENABLE; > + > + if (i915->display.ips.false_color) > + val |= IPS_FALSE_COLOR; > + > if (IS_BROADWELL(i915)) { > drm_WARN_ON(&i915->drm, > snb_pcode_write(&i915->uncore, DISPLAY_IPS_CONTROL, > - IPS_ENABLE | IPS_PCODE_CONTROL)); > + val | IPS_PCODE_CONTROL)); > /* > * Quoting Art Runyan: "its not safe to expect any particular > * value in IPS_CTL bit 31 after enabling IPS through the > @@ -37,7 +43,7 @@ static void hsw_ips_enable(const struct intel_crtc_state > *crtc_state) > * so we need to just enable it and continue on. > */ > } else { > - intel_de_write(i915, IPS_CTL, IPS_ENABLE); > + intel_de_write(i915, IPS_CTL, val); > /* > * The bit only becomes 1 in the next vblank, so this wait here > * is essentially intel_wait_for_vblank. If we don't have this > @@ -268,6 +274,51 @@ void hsw_ips_get_config(struct intel_crtc_state > *crtc_state) > } > } > > +static int hsw_ips_debugfs_false_color_get(void *data, u64 *val) > +{ > + struct intel_crtc *crtc = data; > + struct drm_i915_private *i915 = to_i915(crtc->base.dev); > + > + *val = i915->display.ips.false_color; > + > + return 0; > +} > + > +static int hsw_ips_debugfs_false_color_set(void *data, u64 val) > +{ > + struct intel_crtc *crtc = data; > + struct drm_i915_private *i915 = to_i915(crtc->base.dev); > + struct intel_crtc_state *crtc_state; > + int ret; > + > + ret = drm_modeset_lock(&crtc->base.mutex, NULL); > + if (ret) > + return ret; > + > + i915->display.ips.false_color = val; > + > + crtc_state = to_intel_crtc_state(crtc->base.state); > + > + if (!crtc_state->hw.active) > + goto unlock; > + > + if (crtc_state->uapi.commit && > + !try_wait_for_completion(&crtc_state->uapi.commit->hw_done)) > + goto unlock; > + > + hsw_ips_enable(crtc_state); > + > + unlock: > + drm_modeset_unlock(&crtc->base.mutex); > + > + return ret; > +} > + > +DEFINE_DEBUGFS_ATTRIBUTE(hsw_ips_debugfs_false_color_fops, > + hsw_ips_debugfs_false_color_get, > + hsw_ips_debugfs_false_color_set, > + "%llu\n"); > + > static int hsw_ips_debugfs_status_show(struct seq_file *m, void *unused) > { > struct intel_crtc *crtc = m->private; > @@ -300,6 +351,9 @@ void hsw_ips_crtc_debugfs_add(struct intel_crtc *crtc) > if (!hsw_crtc_supports_ips(crtc)) > return; > > + debugfs_create_file("i915_ips_false_color", 0644, > crtc->base.debugfs_entry, > + crtc, &hsw_ips_debugfs_false_color_fops); > + > debugfs_create_file("i915_ips_status", 0444, crtc->base.debugfs_entry, > crtc, &hsw_ips_debugfs_status_fops); > } > diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h > b/drivers/gpu/drm/i915/display/intel_display_core.h > index 0b5509f268a7..e36f88a39b86 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_core.h > +++ b/drivers/gpu/drm/i915/display/intel_display_core.h > @@ -418,6 +418,10 @@ struct intel_display { > u32 state; > } hti; > > + struct { > + bool false_color; > + } ips; > + > struct { > struct i915_power_domains domains; > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h > index f79e8a544f51..9362c42788ef 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -1397,7 +1397,8 @@ > #define IVB_FBC_RT_BASE_UPPER _MMIO(0x7024) > > #define IPS_CTL _MMIO(0x43408) > -#define IPS_ENABLE (1 << 31) > +#define IPS_ENABLE REG_BIT(31) > +#define IPS_FALSE_COLOR REG_BIT(4) > > #define MSG_FBC_REND_STATE(fbc_id) _MMIO_PIPE((fbc_id), 0x50380, 0x50384) > #define FBC_REND_NUKE REG_BIT(2) -- Jani Nikula, Intel Open Source Graphics Center
