Gen9+ platforms allow CRTC's to be programmed with a background/canvas
color below the programmable planes. Let's expose this for use by
compositors.
Cc: dri-devel@lists.freedesktop.org
Cc: wei.c...@intel.com
Cc: harish.krupo....@intel.com
Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 9 +++++++++
drivers/gpu/drm/i915/i915_reg.h | 6 ++++++
drivers/gpu/drm/i915/intel_display.c | 34 ++++++++++++++++++++++++++++++++++
3 files changed, 49 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index 4565eda29c87..cc423f7f3e62 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3254,6 +3254,15 @@ static int i915_display_info(struct seq_file *m, void
*unused)
intel_plane_info(m, crtc);
}
+ if (INTEL_GEN(dev_priv) >= 9 && pipe_config->base.active) {
+ uint64_t background =
pipe_config->base.background_color;
+
+ seq_printf(m, "\tbackground color (10bpc): r=%x g=%x
b=%x\n",
+ DRM_RGBA_RED(background, 10),
+ DRM_RGBA_GREEN(background, 10),
+ DRM_RGBA_BLUE(background, 10));
+ }
+
seq_printf(m, "\tunderrun reporting: cpu=%s pch=%s \n",
yesno(!crtc->cpu_fifo_underrun_disabled),
yesno(!crtc->pch_fifo_underrun_disabled));
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 20785417953d..988183870f6e 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5661,6 +5661,12 @@ enum {
#define PIPEMISC_DITHER_TYPE_SP (0 << 2)
#define PIPEMISC(pipe) _MMIO_PIPE2(pipe, _PIPE_MISC_A)
+/* Skylake+ pipe bottom (background) color */
+#define _PIPE_BOTTOM_COLOR_A 0x70034
+#define PIPE_BOTTOM_GAMMA_ENABLE (1 << 31)
+#define PIPE_BOTTOM_CSC_ENABLE (1 << 30)
+#define PIPE_BOTTOM_COLOR(pipe) _MMIO_PIPE2(pipe,
_PIPE_BOTTOM_COLOR_A)
+
#define VLV_DPFLIPSTAT _MMIO(VLV_DISPLAY_BASE +
0x70028)
#define PIPEB_LINE_COMPARE_INT_EN (1 << 29)
#define PIPEB_HLINE_INT_EN (1 << 28)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index a145efba9157..2ee402a98e70 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3853,6 +3853,28 @@ void intel_finish_reset(struct drm_i915_private
*dev_priv)
clear_bit(I915_RESET_MODESET, &dev_priv->gpu_error.flags);
}
+static void skl_update_background_color(const struct intel_crtc_state *cstate)
+{
+ struct intel_crtc *crtc = to_intel_crtc(cstate->base.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ uint64_t propval = cstate->base.background_color;
+ uint32_t hwval;
+
+ /* Hardware is programmed with 10 bits of precision */
+ hwval = DRM_RGBA_RED(propval, 10) << 20
+ | DRM_RGBA_GREEN(propval, 10) << 10
+ | DRM_RGBA_BLUE(propval, 10);
+
+ /*
+ * Set CSC and gamma for bottom color to ensure background pixels
+ * receive the same color transformations as plane content.
+ */
+ hwval |= PIPE_BOTTOM_CSC_ENABLE;
+ hwval |= PIPE_BOTTOM_GAMMA_ENABLE;
+
+ I915_WRITE_FW(PIPE_BOTTOM_COLOR(crtc->pipe), hwval);
+}
+
static void intel_update_pipe_config(const struct intel_crtc_state
*old_crtc_state,
const struct intel_crtc_state
*new_crtc_state)
{
@@ -3887,6 +3909,9 @@ static void intel_update_pipe_config(const struct
intel_crtc_state *old_crtc_sta
else if (old_crtc_state->pch_pfit.enabled)
ironlake_pfit_disable(old_crtc_state);
}
+
+ if (new_crtc_state->base.bgcolor_changed)
+ skl_update_background_color(new_crtc_state);
}
static void intel_fdi_normal_train(struct intel_crtc *crtc)
@@ -10791,6 +10816,9 @@ static int intel_crtc_atomic_check(struct drm_crtc
*crtc,
crtc_state->planes_changed = true;
}
+ if (crtc_state->bgcolor_changed)
+ pipe_config->update_pipe = true;
+
ret = 0;
if (dev_priv->display.compute_pipe_wm) {
ret = dev_priv->display.compute_pipe_wm(pipe_config);
@@ -13831,6 +13859,7 @@ static void intel_crtc_init_scalers(struct intel_crtc
*crtc,
static int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
{
+ struct drm_mode_config *mode_config = &dev_priv->drm.mode_config;
struct intel_crtc *intel_crtc;
struct intel_crtc_state *crtc_state = NULL;
struct intel_plane *primary = NULL;
@@ -13905,6 +13934,11 @@ static int intel_crtc_init(struct drm_i915_private
*dev_priv, enum pipe pipe)
WARN_ON(drm_crtc_index(&intel_crtc->base) != intel_crtc->pipe);
+ if (INTEL_GEN(dev_priv) >= 9)
+ drm_object_attach_property(&intel_crtc->base.base,
+ mode_config->bgcolor_property,
+ drm_rgba(16, 0, 0, 0, 0xffff));
+
return 0;
fail:
--
2.14.4
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