Change in coreboot[master]: drivers/aspeed: Fix some issues

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/50195 )

Change subject: drivers/aspeed: Fix some issues
......................................................................

drivers/aspeed: Fix some issues

* Use probe_resource instead of find_resource. This prevents
  a call to die and instead returns NULL.
* Handle the case where BAR2 isn't present
* Don't hardcode legacy VGA when BAR2 is present. This fixes
  graphic initialisation when the Aspeed isn't the primary GPU
  and thus doesn't decode VGA cycles.

This makes the coreboot code more similar to the Linux kernel code.

Change-Id: I2a99712a562a57c65f1cd0df7b1d7606681afe9b
Signed-off-by: Patrick Rudolph 
---
M src/drivers/aspeed/common/ast_main.c
1 file changed, 4 insertions(+), 9 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/95/50195/1

diff --git a/src/drivers/aspeed/common/ast_main.c b/src/drivers/aspeed/common/ast_main.c
index 89194ad..30d1131 100644
--- a/src/drivers/aspeed/common/ast_main.c
+++ b/src/drivers/aspeed/common/ast_main.c
@@ -393,7 +393,7 @@
    ast->dev = dev;

/* PCI BAR 1 */
-	res = find_resource(dev->pdev, PCI_BASE_ADDRESS_1);
+	res = probe_resource(dev->pdev, PCI_BASE_ADDRESS_1);
    if (!res) {
    	dev_err(dev->pdev, "BAR1 resource not found.\n");
    	ret = -EIO;
@@ -407,19 +407,16 @@

/* PCI BAR 2 */
    ast->io_space_uses_mmap = false;
-	res = find_resource(dev->pdev, PCI_BASE_ADDRESS_2);
-	if (!res) {
+	res = probe_resource(dev->pdev, PCI_BASE_ADDRESS_2);
+	if (!res)
    	dev_err(dev->pdev, "BAR2 resource not found.\n");
-		ret = -EIO;
-		goto out_free;
-	}

/*
     * If we don't have IO space at all, use MMIO now and
     * assume the chip has MMIO enabled by default (rev 0x20
     * and higher).
     */
-	if (!(res->flags & IORESOURCE_IO)) {
+	if (!res || !(res->flags & IORESOURCE_IO)) {
    	DRM_INFO("platform has no IO space, trying MMIO\n");
    	ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
    	ast->io_space_uses_mmap = true;
@@ -432,8 +429,6 @@
    		ret = -EIO;
    		goto out_free;
    	}
-		/* Adjust the I/O space location to match expectations (the code expects offset 0x0 to be I/O location 0x380) */
-		ast->ioregs = (void *)AST_IO_MM_OFFSET;
    }

ast_detect_chip(dev, &need_post);