SKL and BXT allow CRTC's to be programmed with a background/canvas color
below the programmable planes. Let's expose this as a property to allow
userspace to program a desired value.
This patch is based on earlier work by Chandra Konduru; unfortunately
the driver has evolved so much since his patches were written
(pre-atomic) that the functionality had to be pretty much completely
rewritten for the new i915 atomic internals.
Cc: Chandra Konduru <chandra.konduru at intel.com>
Cc: dri-devel at lists.freedesktop.org
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
Documentation/DocBook/gpu.tmpl | 10 ++++++++-
drivers/gpu/drm/i915/i915_debugfs.c | 9 ++++++++
drivers/gpu/drm/i915/i915_reg.h | 10 +++++++++
drivers/gpu/drm/i915/intel_display.c | 43 ++++++++++++++++++++++++++++++++++++
4 files changed, 71 insertions(+), 1 deletion(-)
diff --git a/Documentation/DocBook/gpu.tmpl b/Documentation/DocBook/gpu.tmpl
index c05d7df..40c0d49 100644
--- a/Documentation/DocBook/gpu.tmpl
+++ b/Documentation/DocBook/gpu.tmpl
@@ -2819,7 +2819,7 @@ void intel_crt_init(struct drm_device *dev)
<td valign="top" >TBD</td>
</tr>
<tr>
- <td rowspan="20" valign="top" >i915</td>
+ <td rowspan="21" valign="top" >i915</td>
<td rowspan="2" valign="top" >Generic</td>
<td valign="top" >"Broadcast RGB"</td>
<td valign="top" >ENUM</td>
@@ -2835,6 +2835,14 @@ void intel_crt_init(struct drm_device *dev)
<td valign="top" >TBD</td>
</tr>
<tr>
+ <td rowspan="1" valign="top" >CRTC</td>
+ <td valign="top" >âbackground_colorâ</td>
+ <td valign="top" >RGBA</td>
+ <td valign="top" > </td>
+ <td valign="top" >CRTC</td>
+ <td valign="top" >Background color of regions not covered by a
plane</td>
+ </tr>
+ <tr>
<td rowspan="17" valign="top" >SDVO-TV</td>
<td valign="top" >âmodeâ</td>
<td valign="top" >ENUM</td>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index a3b22bd..acb05e5 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2977,6 +2977,15 @@ static int i915_display_info(struct seq_file *m, void
*unused)
crtc->base.cursor->state->crtc_h,
crtc->cursor_addr, yesno(active));
}
+ if (INTEL_INFO(dev)->gen >= 9 && pipe_config->base.active) {
+ drm_rgba_t background =
pipe_config->base.background_color;
+
+ seq_printf(m, "\tbackground color (10bpc): r=%x g=%x
b=%x\n",
+ background.v,
+ DRM_RGBA_REDBITS(background, 10),
+ DRM_RGBA_GREENBITS(background, 10),
+ DRM_RGBA_BLUEBITS(background, 10));
+ }
seq_printf(m, "\tunderrun reporting: cpu=%s pch=%s \n",
yesno(!crtc->cpu_fifo_underrun_disabled),
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9ebf032..95ea394 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7562,6 +7562,16 @@ enum skl_disp_power_wells {
#define PIPE_CSC_POSTOFF_ME(pipe) _PIPE(pipe, _PIPE_A_CSC_POSTOFF_ME,
_PIPE_B_CSC_POSTOFF_ME)
#define PIPE_CSC_POSTOFF_LO(pipe) _PIPE(pipe, _PIPE_A_CSC_POSTOFF_LO,
_PIPE_B_CSC_POSTOFF_LO)
+/* Skylake pipe bottom color */
+#define _PIPE_BOTTOM_COLOR_A 0x70034
+#define _PIPE_BOTTOM_COLOR_B 0x71034
+#define _PIPE_BOTTOM_COLOR_C 0x72034
+#define PIPE_BOTTOM_GAMMA_ENABLE (1 << 31)
+#define PIPE_BOTTOM_CSC_ENABLE (1 << 30)
+#define PIPE_BOTTOM_COLOR_MASK 0x3FFFFFFF
+#define PIPE_BOTTOM_COLOR(pipe) _PIPE3(pipe, _PIPE_BOTTOM_COLOR_A, \
+ _PIPE_BOTTOM_COLOR_B, _PIPE_BOTTOM_COLOR_C)
+
/* MIPI DSI registers */
#define _MIPI_PORT(port, a, c) _PORT3(port, a, 0, c) /* ports A and C only */
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 1fc1d24..b00fca9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3332,6 +3332,8 @@ static void intel_update_pipe_config(struct intel_crtc
*crtc,
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc_state *pipe_config =
to_intel_crtc_state(crtc->base.state);
+ drm_rgba_t background = pipe_config->base.background_color;
+ uint32_t val;
/* drm_atomic_helper_update_legacy_modeset_state might not be called. */
crtc->base.mode = crtc->base.state->mode;
@@ -3368,6 +3370,26 @@ static void intel_update_pipe_config(struct intel_crtc
*crtc,
else if (old_crtc_state->pch_pfit.enabled)
ironlake_pfit_disable(crtc, true);
}
+
+ if (INTEL_INFO(dev)->gen >= 9) {
+ /* BGR 16bpc ==> RGB 10bpc */
+ val = DRM_RGBA_REDBITS(background, 10) << 20
+ | DRM_RGBA_GREENBITS(background, 10) << 10
+ | DRM_RGBA_BLUEBITS(background, 10);
+
+ /*
+ * Set CSC and gamma for bottom color.
+ *
+ * FIXME: We turn these on unconditionally for now to match
+ * how we've setup the various planes. Once the color
+ * management framework lands, it may or may not choose to
+ * set these bits.
+ */
+ val |= PIPE_BOTTOM_CSC_ENABLE;
+ val |= PIPE_BOTTOM_GAMMA_ENABLE;
+
+ I915_WRITE(PIPE_BOTTOM_COLOR(crtc->pipe), val);
+ }
}
static void intel_fdi_normal_train(struct drm_crtc *crtc)
@@ -11788,6 +11810,9 @@ static int intel_crtc_atomic_check(struct drm_crtc
*crtc,
pipe_config);
}
+ if (crtc->state->background_color.v != crtc_state->background_color.v)
+ pipe_config->update_pipe = true;
+
return ret;
}
@@ -13230,6 +13255,7 @@ static const struct drm_crtc_funcs intel_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.destroy = intel_crtc_destroy,
.page_flip = intel_crtc_page_flip,
+ .set_property = drm_atomic_helper_crtc_set_property,
.atomic_duplicate_state = intel_crtc_duplicate_state,
.atomic_destroy_state = intel_crtc_destroy_state,
};
@@ -13780,6 +13806,19 @@ static void skl_init_scalers(struct drm_device *dev,
struct intel_crtc *intel_cr
scaler_state->scaler_id = -1;
}
+static void intel_create_background_color_property(struct drm_device *dev,
+ struct intel_crtc *crtc)
+{
+ if (!dev->mode_config.prop_background_color)
+ dev->mode_config.prop_background_color =
+ drm_mode_create_background_color_property(dev);
+ if (!dev->mode_config.prop_background_color)
+ return;
+
+ drm_object_attach_property(&crtc->base.base,
+ dev->mode_config.prop_background_color, 0);
+}
+
static void intel_crtc_init(struct drm_device *dev, int pipe)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -13855,6 +13894,10 @@ static void intel_crtc_init(struct drm_device *dev,
int pipe)
drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
WARN_ON(drm_crtc_index(&intel_crtc->base) != intel_crtc->pipe);
+
+ if (INTEL_INFO(dev)->gen >= 9)
+ intel_create_background_color_property(dev, intel_crtc);
+
return;
fail:
--
2.1.4
