diff mbox

[08/12] drm/ast: Factor mmc_test code in POST code

Message ID 20170223225357.9572-8-benh@kernel.crashing.org (mailing list archive)
State Not Applicable
Headers show

Commit Message

Benjamin Herrenschmidt Feb. 23, 2017, 10:53 p.m. UTC 
There's a some duplication for what's essentially copies of
two loops, so factor it. The upcoming AST2500 POST code adds
more of them. Also cleanup return types for the test functions,
most of them return a boolean, some return a u32.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
--

v2. - Keep the split between the "test" and "test2" functions
      as they have a different exit condition in the loop and
      a different return type.
    - Fix the return types accross the call chain
---
 drivers/gpu/drm/ast/ast_post.c | 82 ++++++++++++++++--------------------------
 1 file changed, 31 insertions(+), 51 deletions(-)

Comments

Joel Stanley Feb. 24, 2017, 2:21 a.m. UTC | #1 
On Fri, Feb 24, 2017 at 9:23 AM, Benjamin Herrenschmidt
<benh@kernel.crashing.org> wrote:
> There's a some duplication for what's essentially copies of
> two loops, so factor it. The upcoming AST2500 POST code adds
> more of them. Also cleanup return types for the test functions,
> most of them return a boolean, some return a u32.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Acked-by: Joel Stanley <joel@jms.id.au>

> --
>
> v2. - Keep the split between the "test" and "test2" functions
>       as they have a different exit condition in the loop and
>       a different return type.
>     - Fix the return types accross the call chain
> ---
>  drivers/gpu/drm/ast/ast_post.c | 82 ++++++++++++++++--------------------------
>  1 file changed, 31 insertions(+), 51 deletions(-)
YC Chen Feb. 24, 2017, 7:07 a.m. UTC | #2 
Tested-by: Y.C. Chen <yc_chen@aspeedtech.com>

-----Original Message-----
From: Benjamin Herrenschmidt [mailto:benh@kernel.crashing.org] 
Sent: Friday, February 24, 2017 6:54 AM
To: dri-devel@lists.freedesktop.org
Cc: YC Chen <yc_chen@aspeedtech.com>; airlied@redhat.com; eich@suse.come; linuxppc-dev@ozlabs.org
Subject: [PATCH 08/12] drm/ast: Factor mmc_test code in POST code

There's a some duplication for what's essentially copies of two loops, so factor it. The upcoming AST2500 POST code adds more of them. Also cleanup return types for the test functions, most of them return a boolean, some return a u32.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff mbox

Patch

diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index e802450..c55067c 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -445,85 +445,65 @@  static const u32 pattern[8] = {
 	0x7C61D253
 };
 
-static int mmc_test_burst(struct ast_private *ast, u32 datagen)
+static bool mmc_test(struct ast_private *ast, u32 datagen, u8 test_ctl)
 {
 	u32 data, timeout;
 
 	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	ast_moutdwm(ast, 0x1e6e0070, 0x000000c1 | (datagen << 3));
+	ast_moutdwm(ast, 0x1e6e0070, (datagen << 3) | test_ctl);
 	timeout = 0;
 	do {
 		data = ast_mindwm(ast, 0x1e6e0070) & 0x3000;
-		if (data & 0x2000) {
-			return 0;
-		}
+		if (data & 0x2000)
+			return false;
 		if (++timeout > TIMEOUT) {
 			ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-			return 0;
+			return false;
 		}
 	} while (!data);
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	return 1;
+	ast_moutdwm(ast, 0x1e6e0070, 0x0);
+	return true;
 }
 
-static int mmc_test_burst2(struct ast_private *ast, u32 datagen)
+static u32 mmc_test2(struct ast_private *ast, u32 datagen, u8 test_ctl)
 {
 	u32 data, timeout;
 
 	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000041 | (datagen << 3));
+	ast_moutdwm(ast, 0x1e6e0070, (datagen << 3) | test_ctl);
 	timeout = 0;
 	do {
 		data = ast_mindwm(ast, 0x1e6e0070) & 0x1000;
 		if (++timeout > TIMEOUT) {
 			ast_moutdwm(ast, 0x1e6e0070, 0x0);
-			return -1;
+			return 0xffffffff;
 		}
 	} while (!data);
 	data = ast_mindwm(ast, 0x1e6e0078);
 	data = (data | (data >> 16)) & 0xffff;
-	ast_moutdwm(ast, 0x1e6e0070, 0x0);
+	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
 	return data;
 }
 
-static int mmc_test_single(struct ast_private *ast, u32 datagen)
+
+static bool mmc_test_burst(struct ast_private *ast, u32 datagen)
 {
-	u32 data, timeout;
+	return mmc_test(ast, datagen, 0xc1);
+}
 
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	ast_moutdwm(ast, 0x1e6e0070, 0x000000c5 | (datagen << 3));
-	timeout = 0;
-	do {
-		data = ast_mindwm(ast, 0x1e6e0070) & 0x3000;
-		if (data & 0x2000)
-			return 0;
-		if (++timeout > TIMEOUT) {
-			ast_moutdwm(ast, 0x1e6e0070, 0x0);
-			return 0;
-		}
-	} while (!data);
-	ast_moutdwm(ast, 0x1e6e0070, 0x0);
-	return 1;
+static u32 mmc_test_burst2(struct ast_private *ast, u32 datagen)
+{
+	return mmc_test2(ast, datagen, 0x41);
 }
 
-static int mmc_test_single2(struct ast_private *ast, u32 datagen)
+static bool mmc_test_single(struct ast_private *ast, u32 datagen)
 {
-	u32 data, timeout;
+	return mmc_test(ast, datagen, 0xc5);
+}
 
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000000);
-	ast_moutdwm(ast, 0x1e6e0070, 0x00000005 | (datagen << 3));
-	timeout = 0;
-	do {
-		data = ast_mindwm(ast, 0x1e6e0070) & 0x1000;
-		if (++timeout > TIMEOUT) {
-			ast_moutdwm(ast, 0x1e6e0070, 0x0);
-			return -1;
-		}
-	} while (!data);
-	data = ast_mindwm(ast, 0x1e6e0078);
-	data = (data | (data >> 16)) & 0xffff;
-	ast_moutdwm(ast, 0x1e6e0070, 0x0);
-	return data;
+static u32 mmc_test_single2(struct ast_private *ast, u32 datagen)
+{
+	return mmc_test2(ast, datagen, 0x05);
 }
 
 static int cbr_test(struct ast_private *ast)
@@ -601,16 +581,16 @@  static u32 cbr_scan2(struct ast_private *ast)
 	return data2;
 }
 
-static u32 cbr_test3(struct ast_private *ast)
+static bool cbr_test3(struct ast_private *ast)
 {
 	if (!mmc_test_burst(ast, 0))
-		return 0;
+		return false;
 	if (!mmc_test_single(ast, 0))
-		return 0;
-	return 1;
+		return false;
+	return true;
 }
 
-static u32 cbr_scan3(struct ast_private *ast)
+static bool cbr_scan3(struct ast_private *ast)
 {
 	u32 patcnt, loop;
 
@@ -621,9 +601,9 @@  static u32 cbr_scan3(struct ast_private *ast)
 				break;
 		}
 		if (loop == 2)
-			return 0;
+			return false;
 	}
-	return 1;
+	return true;
 }
 
 static bool finetuneDQI_L(struct ast_private *ast, struct ast2300_dram_param *param)