[PATCH xf86-video-amdgpu 03/13] List disabled color properties on RandR outputs without a CRTC

[sunpeng.li at amd.com]

From: "Leo (Sunpeng) Li" <sunpeng.li at amd.com>

The properties on an RandR output needs to stay consistent throughout
it's lifecycle. However, we cannot list color properties on an output if
there is no CRTC attached.

Therefore, create a fake CRTC, and initialize "disabled" color
properites on outputs without a CRTC.

Signed-off-by: Leo (Sunpeng) Li <sunpeng.li at amd.com>
---
 src/drmmode_display.c | 154 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 85de01e..c28796c 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -869,6 +869,124 @@ err_allocs:
 }
 
 /**
+ * Configure and change a color property on a CRTC, through RandR. Only the
+ * specified output will be affected, even if the CRTC is attached to multiple
+ * outputs. If the request is pending, then the change will make it's way into
+ * the kernel DRM driver. Otherwise, the request will be a user-land only
+ * update.
+ *
+ * @output: RandR output to set the property on.
+ * @crtc: The driver-private CRTC object containing the color properties.
+ * @cm_prop_index: Color management property to configure and change.
+ * @pending: Whether this request is pending.
+ *
+ * Return 0 on success, X-defined error code otherwise.
+ */
+static int rr_configure_and_change_cm_property(xf86OutputPtr output,
+					       drmmode_crtc_private_ptr crtc,
+					       enum drmmode_cm_prop cm_prop_index,
+					       Bool pending)
+{
+	Bool need_configure = TRUE;
+	unsigned long length = 0;
+	void *data = NULL;
+	int format = 0;
+	uint16_t value;
+	INT32 range[2];
+	Atom atom;
+	int err;
+
+	if (cm_prop_index == CM_INVALID_PROP)
+		return BadName;
+
+	atom = MakeAtom(CM_PROP_NAMES[cm_prop_index],
+			strlen(CM_PROP_NAMES[cm_prop_index]),
+			TRUE);
+	if (!atom)
+		return BadAlloc;
+
+	if (cm_prop_index == CM_GAMMA_LUT_SIZE) {
+		format = 32;
+		length = 1;
+		data = &crtc->gamma_lut_size;
+		range[0] = 0;
+		range[1] = -1;
+
+	} else if (cm_prop_index == CM_DEGAMMA_LUT_SIZE) {
+		format = 32;
+		length = 1;
+		data = &crtc->degamma_lut_size;
+		range[0] = 0;
+		range[1] = -1;
+
+	} else if (cm_prop_index == CM_GAMMA_LUT) {
+		format = 16;
+		range[0] = 0;
+		range[1] = (1 << 16) - 1; // Max 16 bit unsigned int.
+		if (crtc->gamma_lut) {
+			/* Convert from 8bit size to 16bit size */
+			length = sizeof(*crtc->gamma_lut) >> 1;
+			length *= crtc->gamma_lut_size;
+			data = crtc->gamma_lut;
+		} else {
+			length = 1;
+			value = 0;
+			data = &value;
+		}
+	} else if (cm_prop_index == CM_DEGAMMA_LUT) {
+		format = 16;
+		range[0] = 0;
+		range[1] = (1 << 16) - 1; // Max 16 bit unsigned int.
+		if (crtc->degamma_lut) {
+			/* Convert from 8bit size to 16bit size */
+			length = sizeof(*crtc->degamma_lut) >> 1;
+			length *= crtc->degamma_lut_size;
+			data = crtc->degamma_lut;
+		} else {
+			length = 1;
+			value = 0;
+			data = &value;
+		}
+	} else {
+		/* CTM is fixed-point S31.32 format. */
+		format = 16;
+		need_configure = FALSE;
+		if (crtc->ctm) {
+			length = sizeof(*crtc->ctm) >> 1;
+			data = crtc->ctm;
+		} else {
+			length = 1;
+			value = 0;
+			data = &value;
+		}
+	}
+
+	if (need_configure) {
+		err = RRConfigureOutputProperty(output->randr_output, atom,
+						FALSE, TRUE, FALSE, 2, range);
+		if (err) {
+			xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
+				   "Configuring color management property %s failed with %d\n",
+				   CM_PROP_NAMES[cm_prop_index], err);
+			return err;
+		}
+	}
+
+	err = RRChangeOutputProperty(output->randr_output, atom,
+				     XA_INTEGER, format,
+				     PropModeReplace,
+				     length, data, FALSE, pending);
+	if (err) {
+		xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
+			   "Changing color management property %s failed with %d\n",
+			   CM_PROP_NAMES[cm_prop_index], err);
+		return err;
+	}
+
+	return 0;
+}
+
+/**
  * Push staged color management properties on the CRTC to DRM.
  *
  * @crtc: The CRTC containing staged properties
@@ -1851,6 +1969,40 @@ static Bool drmmode_property_ignore(drmModePropertyPtr prop)
 	return FALSE;
 }
 
+/**
+ * Using a fake CRTC, configure and change color properties for the output,
+ * using the default (0) color properties on the fake CRTC. Use to initialize
+ * color management properties on an output where a CRTC has not yet been
+ * attached.
+ */
+static void drmmode_disabled_crtc_create_resources(xf86OutputPtr output)
+{
+	drmmode_crtc_private_ptr fake_crtc;
+	int i, ret;
+
+	/* Create a fake crtc */
+	fake_crtc = calloc(1, sizeof(drmmode_crtc_private_rec));
+	if (!fake_crtc) {
+		xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
+			   "Memory error creating resources for fake CRTC\n");
+		return;
+	}
+
+	for (i = 0; i < CM_NUM_PROPS; i++) {
+		ret = rr_configure_and_change_cm_property(output, fake_crtc, i,
+							  FALSE);
+		if (ret) {
+			xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
+				   "Configur and change cm property error %d\n",
+				   ret);
+			break;
+		}
+	}
+
+	free(fake_crtc);
+	return;
+}
+
 static void drmmode_output_create_resources(xf86OutputPtr output)
 {
 	AMDGPUInfoPtr info = AMDGPUPTR(output->scrn);
@@ -1978,6 +2130,8 @@ static void drmmode_output_create_resources(xf86OutputPtr output)
 			}
 		}
 	}
+
+	drmmode_disabled_crtc_create_resources(output);
 }
 
 static void
-- 
2.7.4