Message-ID: <20201228030823.294147-1-kuohsiang_chou@xxxxxxxxxxxxxx>
-----Original Message-----
From: Thomas Zimmermann [mailto:tzimmermann@xxxxxxx]
Sent: Monday, March 29, 2021 5:17 PM
To: Kuo-Hsiang Chou <kuohsiang_chou@xxxxxxxxxxxxxx>; dri-devel@xxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
Subject: Re: [PATCH V3] drm/ast: Disable fast reset after DRAM initial
Hi,
I cannot apply this patch. The error is shown below. Which tree do you use? Can you please move to drm-misc-next?
Applying: drm/ast: Disable fast reset after DRAM initial
error: sha1 information is lacking or useless (drivers/gpu/drm/ast/ast_drv.h).
error: could not build fake ancestor
Patch failed at 0001 drm/ast: Disable fast reset after DRAM initial
hint: Use 'git am --show-current-patch=diff' to see the failed patch When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".
dim: ERROR: git apply-mbox failed
Hi, Thomas,
Thanks for the comments, I still use kernel_5.9. Yes, I will move to the latest version of drm-misc-next.
The errors seem to be caused by a pending patch(Message-ID: <20201228030823.294147-1-kuohsiang_chou@xxxxxxxxxxxxxx>).
And I submitted current patch before reviewer result of pending patch(Message-ID: <20201228030823.294147-1-kuohsiang_chou@xxxxxxxxxxxxxx>).
Please give an instruction how to works to next step.
Continue waiting for the reviewer result, or move to kernel_5.12-rc1 and submit the pending patch again? Or other suggestions?
Thanks!
Best Regards,
Kuo-Hsiang Chou
Best regards
Thomas
Am 19.03.21 um 10:23 schrieb KuoHsiang Chou:
[Bug][AST2500]
V1:
When AST2500 acts as stand-alone VGA so that DRAM and DVO
initialization have to be achieved by VGA driver with P2A (PCI to AHB) enabling.
However, HW suggests disable Fast reset mode after DRAM initializaton,
because fast reset mode is mainly designed for ARM ICE debugger.
Once Fast reset is checked as enabling, WDT (Watch Dog Timer) should
be first enabled to avoid system deadlock before disable fast reset mode.
V2:
Use to_pci_dev() to get revision of PCI configuration.
V3:
If SCU00 is not unlocked, just enter its password again.
It is unnecessary to clear AHB lock condition and restore WDT default
setting again, before Fast-reset clearing.
Signed-off-by: KuoHsiang Chou <kuohsiang_chou@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/ast/ast_drv.h | 1 +
drivers/gpu/drm/ast/ast_main.c | 5 +++
drivers/gpu/drm/ast/ast_post.c | 68 +++++++++++++++++++++-------------
3 files changed, 48 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.h
b/drivers/gpu/drm/ast/ast_drv.h index da6dfb677540..a2cf5fef2399
100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -320,6 +320,7 @@ bool ast_is_vga_enabled(struct drm_device *dev);
void ast_post_gpu(struct drm_device *dev);
u32 ast_mindwm(struct ast_private *ast, u32 r);
void ast_moutdwm(struct ast_private *ast, u32 r, u32 v);
+void ast_patch_ahb_2500(struct ast_private *ast);
/* ast dp501 */
void ast_set_dp501_video_output(struct drm_device *dev, u8 mode);
bool ast_backup_fw(struct drm_device *dev, u8 *addr, u32 size); diff
--git a/drivers/gpu/drm/ast/ast_main.c
b/drivers/gpu/drm/ast/ast_main.c index 3775fe26f792..0e4dfcc25623
100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -69,6 +69,7 @@ static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev)
{
struct device_node *np = dev->pdev->dev.of_node;
struct ast_private *ast = to_ast_private(dev);
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
uint32_t data, jregd0, jregd1;
/* Defaults */
@@ -96,6 +97,10 @@ static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev)
jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) {
+ /* Patch AST2500 */
+ if (((pdev->revision & 0xF0) == 0x40) && ((jregd0 & 0xC0) == 0))
+ ast_patch_ahb_2500(ast);
+
/* Double check it's actually working */
data = ast_read32(ast, 0xf004);
if (data != 0xFFFFFFFF) {
diff --git a/drivers/gpu/drm/ast/ast_post.c
b/drivers/gpu/drm/ast/ast_post.c index 8902c2f84bf9..4f194c5fd2c2
100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -2026,6 +2026,30 @@ static bool ast_dram_init_2500(struct ast_private *ast)
return true;
}
+void ast_patch_ahb_2500(struct ast_private *ast) {
+ u32 data;
+
+ /* Clear bus lock condition */
+ ast_moutdwm(ast, 0x1e600000, 0xAEED1A03);
+ ast_moutdwm(ast, 0x1e600084, 0x00010000);
+ ast_moutdwm(ast, 0x1e600088, 0x00000000);
+ ast_moutdwm(ast, 0x1e6e2000, 0x1688A8A8);
+ data = ast_mindwm(ast, 0x1e6e2070);
+ if (data & 0x08000000) { /* check fast reset */
+
+ ast_moutdwm(ast, 0x1E785004, 0x00000010);
+ ast_moutdwm(ast, 0x1E785008, 0x00004755);
+ ast_moutdwm(ast, 0x1E78500c, 0x00000033);
+ udelay(1000);
+ }
+ do {
+ ast_moutdwm(ast, 0x1e6e2000, 0x1688A8A8);
+ data = ast_mindwm(ast, 0x1e6e2000);
+ } while (data != 1);
+ ast_moutdwm(ast, 0x1e6e207c, 0x08000000); /* clear fast reset */
+}
+
void ast_post_chip_2500(struct drm_device *dev)
{
struct ast_private *ast = to_ast_private(dev); @@ -2033,39 +2057,31
@@ void ast_post_chip_2500(struct drm_device *dev)
u8 reg;
reg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff);
- if ((reg & 0x80) == 0) {/* vga only */
+ if ((reg & 0xC0) == 0) {/* vga only */
/* Clear bus lock condition */
- ast_moutdwm(ast, 0x1e600000, 0xAEED1A03);
- ast_moutdwm(ast, 0x1e600084, 0x00010000);
- ast_moutdwm(ast, 0x1e600088, 0x00000000);
- ast_moutdwm(ast, 0x1e6e2000, 0x1688A8A8);
- ast_write32(ast, 0xf004, 0x1e6e0000);
- ast_write32(ast, 0xf000, 0x1);
- ast_write32(ast, 0x12000, 0x1688a8a8);
- while (ast_read32(ast, 0x12000) != 0x1)
- ;
-
- ast_write32(ast, 0x10000, 0xfc600309);
- while (ast_read32(ast, 0x10000) != 0x1)
- ;
+ ast_patch_ahb_2500(ast);
+
+ /* Disable watchdog */
+ ast_moutdwm(ast, 0x1E78502C, 0x00000000);
+ ast_moutdwm(ast, 0x1E78504C, 0x00000000);
+ /* Reset USB port */
+ ast_moutdwm(ast, 0x1E6E2090, 0x20000000);
+ ast_moutdwm(ast, 0x1E6E2094, 0x00004000);
+ if (ast_mindwm(ast, 0x1E6E2070) & 0x00800000) {
+ ast_moutdwm(ast, 0x1E6E207C, 0x00800000);
+ mdelay(100);
+ ast_moutdwm(ast, 0x1E6E2070, 0x00800000);
+ }
+ /* Modify eSPI reset pin */
+ temp = ast_mindwm(ast, 0x1E6E2070);
+ if (temp & 0x02000000)
+ ast_moutdwm(ast, 0x1E6E207C, 0x00004000);
/* Slow down CPU/AHB CLK in VGA only mode */
temp = ast_read32(ast, 0x12008);
temp |= 0x73;
ast_write32(ast, 0x12008, temp);
- /* Reset USB port to patch USB unknown device issue */
- ast_moutdwm(ast, 0x1e6e2090, 0x20000000);
- temp = ast_mindwm(ast, 0x1e6e2094);
- temp |= 0x00004000;
- ast_moutdwm(ast, 0x1e6e2094, temp);
- temp = ast_mindwm(ast, 0x1e6e2070);
- if (temp & 0x00800000) {
- ast_moutdwm(ast, 0x1e6e207c, 0x00800000);
- mdelay(100);
- ast_moutdwm(ast, 0x1e6e2070, 0x00800000);
- }
-
if (!ast_dram_init_2500(ast))
drm_err(dev, "DRAM init failed !\n");
--
2.18.4
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--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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