[PATCH v2 23/26] chromebook_samus: Enable the copy framebuffer

[Simon Glass]

Update the video driver to support this feature and enable it on samus.
Also remove the multi-line scrolling since normal scrolling is fast enough
now.

With this change, the time taken to print the environment to the display
without CONFIG_CONSOLE_SCROLL_LINES is reduced from about 430ms to 12ms.

Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Anatolij Gustschin <agust at denx.de>
---

Changes in v2: None

 configs/chromebook_samus_defconfig |  2 +-
 drivers/video/broadwell_igd.c      | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/configs/chromebook_samus_defconfig b/configs/chromebook_samus_defconfig
index fb4d88028c..13058ea7d7 100644
--- a/configs/chromebook_samus_defconfig
+++ b/configs/chromebook_samus_defconfig
@@ -67,7 +67,7 @@ CONFIG_SPI=y
 CONFIG_TPM_TIS_LPC=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
+CONFIG_VIDEO_COPY=y
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
 CONFIG_FRAMEBUFFER_VESA_MODE_11A=y
-CONFIG_CONSOLE_SCROLL_LINES=5
 CONFIG_TPM=y
diff --git a/drivers/video/broadwell_igd.c b/drivers/video/broadwell_igd.c
index 8e8fe9d9b3..df6a761d2d 100644
--- a/drivers/video/broadwell_igd.c
+++ b/drivers/video/broadwell_igd.c
@@ -664,6 +664,7 @@ static int broadwell_igd_probe(struct udevice *dev)
 	struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	bool is_broadwell;
+	ulong fbbase;
 	int ret;
 
 	if (!ll_boot_init()) {
@@ -690,7 +691,8 @@ static int broadwell_igd_probe(struct udevice *dev)
 		return ret;
 
 	/* Use write-combining for the graphics memory, 256MB */
-	ret = mtrr_add_request(MTRR_TYPE_WRCOMB, plat->base, 256 << 20);
+	fbbase = IS_ENABLED(CONFIG_VIDEO_COPY) ? plat->copy_base : plat->base;
+	ret = mtrr_add_request(MTRR_TYPE_WRCOMB, fbbase, 256 << 20);
 	if (!ret)
 		ret = mtrr_commit(true);
 	if (ret && ret != -ENOSYS) {
@@ -752,6 +754,17 @@ static int broadwell_igd_ofdata_to_platdata(struct udevice *dev)
 	return 0;
 }
 
+static int broadwell_igd_bind(struct udevice *dev)
+{
+	struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
+
+	/* Set the maximum supported resolution */
+	uc_plat->size = 2560 * 1600 * 4;
+	log_debug("%s: Frame buffer size %x\n", __func__, uc_plat->size);
+
+	return 0;
+}
+
 static const struct video_ops broadwell_igd_ops = {
 };
 
@@ -766,6 +779,7 @@ U_BOOT_DRIVER(broadwell_igd) = {
 	.of_match = broadwell_igd_ids,
 	.ops	= &broadwell_igd_ops,
 	.ofdata_to_platdata = broadwell_igd_ofdata_to_platdata,
+	.bind	= broadwell_igd_bind,
 	.probe	= broadwell_igd_probe,
 	.priv_auto_alloc_size	= sizeof(struct broadwell_igd_priv),
 	.platdata_auto_alloc_size	= sizeof(struct broadwell_igd_plat),
-- 
2.27.0.rc0.183.gde8f92d652-goog