[PATCH 08/14] drm/i915: Complete crtc hw/uapi split, v2.

Maarten Lankhorst
2019-10-17T13:21:10Z

Now that we separated everything into uapi and hw, it's
time to make the split definitive. Remove the union and
make a copy of the hw state on modeset and fastset.

Color blobs are copied in crtc atomic_check(), right
before color management is checked.

Changes since v1:
- Copy all blobs immediately after drm_atomic_helper_check_modeset().
- Clear crtc_state->hw on disable, instead of using clear_intel_crtc_state().

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_atomic.c | 44 ++++++++++++++++++
drivers/gpu/drm/i915/display/intel_atomic.h | 2 +
drivers/gpu/drm/i915/display/intel_display.c | 45 ++++++++++++++++---
.../drm/i915/display/intel_display_types.h | 9 ++--
4 files changed, 89 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
index 7cf13b9c7d38..266d0ce9d03d 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -195,6 +195,14 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)

__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->uapi);

+ /* copy color blobs */
+ if (crtc_state->hw.degamma_lut)
+ drm_property_blob_get(crtc_state->hw.degamma_lut);
+ if (crtc_state->hw.ctm)
+ drm_property_blob_get(crtc_state->hw.ctm);
+ if (crtc_state->hw.gamma_lut)
+ drm_property_blob_get(crtc_state->hw.gamma_lut);
+
crtc_state->update_pipe = false;
crtc_state->disable_lp_wm = false;
crtc_state->disable_cxsr = false;
@@ -208,6 +216,41 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
return &crtc_state->uapi;
}

+static void intel_crtc_put_color_blobs(struct intel_crtc_state *crtc_state)
+{
+ drm_property_blob_put(crtc_state->hw.degamma_lut);
+ drm_property_blob_put(crtc_state->hw.gamma_lut);
+ drm_property_blob_put(crtc_state->hw.ctm);
+}
+
+void intel_crtc_free_hw_state(struct intel_crtc_state *crtc_state)
+{
+ intel_crtc_put_color_blobs(crtc_state);
+}
+
+void intel_crtc_copy_color_blobs(struct intel_crtc_state *crtc_state)
+{
+ intel_crtc_put_color_blobs(crtc_state);
+
+ if (crtc_state->uapi.degamma_lut)
+ crtc_state->hw.degamma_lut =
+ drm_property_blob_get(crtc_state->uapi.degamma_lut);
+ else
+ crtc_state->hw.degamma_lut = NULL;
+
+ if (crtc_state->uapi.gamma_lut)
+ crtc_state->hw.gamma_lut =
+ drm_property_blob_get(crtc_state->uapi.gamma_lut);
+ else
+ crtc_state->hw.gamma_lut = NULL;
+
+ if (crtc_state->uapi.ctm)
+ crtc_state->hw.ctm =
+ drm_property_blob_get(crtc_state->uapi.ctm);
+ else
+ crtc_state->hw.ctm = NULL;
+}
+
/**
* intel_crtc_destroy_state - destroy crtc state
* @crtc: drm crtc
@@ -223,6 +266,7 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
struct intel_crtc_state *crtc_state = to_intel_crtc_state(state);

__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
+ intel_crtc_free_hw_state(crtc_state);
kfree(crtc_state);
}

diff --git a/drivers/gpu/drm/i915/display/intel_atomic.h b/drivers/gpu/drm/i915/display/intel_atomic.h
index 58065d3161a3..42be91e0772a 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.h
+++ b/drivers/gpu/drm/i915/display/intel_atomic.h
@@ -35,6 +35,8 @@ intel_digital_connector_duplicate_state(struct drm_connector *connector);
struct drm_crtc_state *intel_crtc_duplicate_state(struct drm_crtc *crtc);
void intel_crtc_destroy_state(struct drm_crtc *crtc,
struct drm_crtc_state *state);
+void intel_crtc_free_hw_state(struct intel_crtc_state *crtc_state);
+void intel_crtc_copy_color_blobs(struct intel_crtc_state *crtc_state);
struct drm_atomic_state *intel_atomic_state_alloc(struct drm_device *dev);
void intel_atomic_state_clear(struct drm_atomic_state *state);

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 06c593d56d92..c009489641bd 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -114,6 +114,7 @@ static const u64 cursor_format_modifiers[] = {
DRM_FORMAT_MOD_INVALID
};

+static void copy_uapi_to_hw_state(struct intel_crtc_state *crtc_state);
static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
struct intel_crtc_state *pipe_config);
static void ironlake_pch_clock_get(struct intel_crtc *crtc,
@@ -7041,6 +7042,7 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc,
crtc->enabled = false;
crtc->state->connector_mask = 0;
crtc->state->encoder_mask = 0;
+ copy_uapi_to_hw_state(to_intel_crtc_state(crtc->state));

for_each_encoder_on_crtc(crtc->dev, crtc, encoder)
encoder->base.crtc = NULL;
@@ -12254,6 +12256,23 @@ static bool check_digital_port_conflicts(struct intel_atomic_state *state)
return ret;
}

+static void copy_uapi_to_hw_state(struct intel_crtc_state *crtc_state)
+{
+ crtc_state->hw.enable = crtc_state->uapi.enable;
+ crtc_state->hw.active = crtc_state->uapi.active;
+ crtc_state->hw.mode = crtc_state->uapi.mode;
+ crtc_state->hw.adjusted_mode = crtc_state->uapi.adjusted_mode;
+ intel_crtc_copy_color_blobs(crtc_state);
+}
+
+static void copy_hw_to_uapi_state(struct intel_crtc_state *crtc_state)
+{
+ crtc_state->uapi.enable = crtc_state->hw.enable;
+ crtc_state->uapi.active = crtc_state->hw.active;
+ crtc_state->uapi.mode = crtc_state->hw.mode;
+ crtc_state->uapi.adjusted_mode = crtc_state->hw.adjusted_mode;
+}
+
static int
clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
{
@@ -12270,6 +12289,7 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
* fixed, so that the crtc_state can be safely duplicated. For now,
* only fields that are know to not cause problems are preserved. */

+ saved_state->uapi = crtc_state->uapi;
saved_state->scaler_state = crtc_state->scaler_state;
saved_state->shared_dpll = crtc_state->shared_dpll;
saved_state->dpll_hw_state = crtc_state->dpll_hw_state;
@@ -12280,12 +12300,9 @@ clear_intel_crtc_state(struct intel_crtc_state *crtc_state)
IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
saved_state->wm = crtc_state->wm;

- /* Keep base drm_crtc_state intact, only clear our extended struct */
- BUILD_BUG_ON(offsetof(struct intel_crtc_state, base));
- BUILD_BUG_ON(offsetof(struct intel_crtc_state, uapi));
- BUILD_BUG_ON(offsetof(struct intel_crtc_state, hw));
- memcpy(&crtc_state->uapi + 1, &saved_state->uapi + 1,
- sizeof(*crtc_state) - sizeof(crtc_state->uapi));
+ intel_crtc_free_hw_state(crtc_state);
+ memcpy(crtc_state, saved_state, sizeof(*crtc_state));
+ copy_uapi_to_hw_state(crtc_state);

kfree(saved_state);
return 0;
@@ -12425,6 +12442,9 @@ intel_modeset_pipe_config(struct intel_crtc_state *pipe_config)
DRM_DEBUG_KMS("hw max bpp: %i, pipe bpp: %i, dithering: %i\n",
base_bpp, pipe_config->pipe_bpp, pipe_config->dither);

+ /* uapi wants a copy of the adjusted_mode for vblank bookkeeping */
+ pipe_config->uapi.adjusted_mode = pipe_config->hw.adjusted_mode;
+
return 0;
}

@@ -13110,6 +13130,8 @@ verify_crtc_state(struct intel_crtc *crtc,

state = old_crtc_state->uapi.state;
__drm_atomic_helper_crtc_destroy_state(&old_crtc_state->uapi);
+ intel_crtc_free_hw_state(old_crtc_state);
+
pipe_config = old_crtc_state;
memset(pipe_config, 0, sizeof(*pipe_config));
pipe_config->uapi.crtc = &crtc->base;
@@ -13572,11 +13594,17 @@ static int intel_atomic_check(struct drm_device *dev,

for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
new_crtc_state, i) {
- if (!needs_modeset(new_crtc_state))
+ if (!needs_modeset(new_crtc_state)) {
+ if (new_crtc_state->uapi.color_mgmt_changed)
+ intel_crtc_copy_color_blobs(new_crtc_state);
continue;
+ }

if (!new_crtc_state->uapi.enable) {
any_ms = true;
+ intel_crtc_free_hw_state(new_crtc_state);
+ memset(&new_crtc_state->hw, 0,
+ sizeof(new_crtc_state->hw));
continue;
}

@@ -16662,6 +16690,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
to_intel_crtc_state(crtc->base.state);

__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
+ intel_crtc_free_hw_state(crtc_state);
memset(crtc_state, 0, sizeof(*crtc_state));
__drm_atomic_helper_crtc_reset(&crtc->base, &crtc_state->uapi);

@@ -16790,6 +16819,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
* set a flag to indicate that a full recalculation is
* needed on the next commit.
*/
+ crtc_state->hw.mode = crtc->base.mode;
crtc_state->hw.mode.private_flags = I915_MODE_FLAG_INHERITED;

intel_crtc_compute_pixel_rate(crtc_state);
@@ -16820,6 +16850,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)

intel_bw_crtc_update(bw_state, crtc_state);

+ copy_hw_to_uapi_state(crtc_state);
intel_pipe_config_sanity_check(dev_priv, crtc_state);
}
}
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 4d85ea5832d7..41d471ab9a64 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -749,8 +749,6 @@ enum intel_output_format {
};

struct intel_crtc_state {
- union {
- struct drm_crtc_state base;
/*
* uapi (drm) state. This is the software state shown to userspace.
* In particular, the following members are used for bookkeeping:
@@ -773,8 +771,11 @@ struct intel_crtc_state {
*
* During initial hw readout, they need to be copied to uapi.
*/
- struct drm_crtc_state hw;
- };
+ struct {
+ bool active, enable;
+ struct drm_property_blob *degamma_lut, *gamma_lut, *ctm;
+ struct drm_display_mode mode, adjusted_mode;
+ } hw;

/**
* quirks - bitfield with hw state readout quirks
--
2.23.0