From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 30 Jul 2021 20:15:44 +0000 (+0300)
Subject: x86: tangier: Fix DMA controller IRQ polarity in CSRT
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=46db4bbac3287a114ddf941ad3861381b795197b;p=u-boot.git

x86: tangier: Fix DMA controller IRQ polarity in CSRT

IRQ polarity in CSRT has the same definition as by ACPI specification
chapter 19.6.64 "Interrupt (Interrupt Resource Descriptor Macro)", i.e.
ActiveHigh is 0, and ActiveLow is 1. On Intel Tangier the DMA controller
IRQ polarity is ActiveHigh.

Note, in DSDT (see southcluster.asl) it's described correctly.

Fixes: 5e99fde34a77 ("x86: tangier: Populate CSRT for shared DMA controller")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

diff --git a/arch/x86/cpu/tangier/acpi.c b/arch/x86/cpu/tangier/acpi.c
index 41bd177e09..82f4ce5a34 100644
--- a/arch/x86/cpu/tangier/acpi.c
+++ b/arch/x86/cpu/tangier/acpi.c
@@ -89,8 +89,8 @@ static u32 acpi_fill_csrt_dma(struct acpi_csrt_group *grp)
 	si->mmio_base_low = 0xff192000;
 	si->mmio_base_high = 0;
 	si->gsi_interrupt = 32;
-	si->interrupt_polarity = 1;
-	si->interrupt_mode = 0;
+	si->interrupt_polarity = 0;	/* Active High */
+	si->interrupt_mode = 0;		/* Level triggered */
 	si->num_channels = 8;
 	si->dma_address_width = 32;
 	si->base_request_line = 0;