Re: [PATCH 1/4 v3] drm: Add support of ARC PGU display controller
On Fri, Mar 11, 2016 at 06:42:36PM +0300, Alexey Brodkin wrote:
> ARC PGU could be found on some development boards from Synopsys.
> This is a simple byte streamer that reads data from a framebuffer
> and sends data to the single encoder.
>
> Signed-off-by: Alexey Brodkin
> Cc: David Airlie
> Cc: dri-de...@lists.freedesktop.org
> Cc: linux-snps-arc@lists.infradead.org
> Cc: Jose Abreu
> ---
>
> Changes v2 -> v3:
> * Improved failure path if arcpgu_connector wasn't allocated (thanks Jose).
> * Fixed driver building as module (reported by 0-DAY kernel test
> infrastruct.)
> * Implemented uncached mapping of user-space FB pages.
>
> No changes v1 -> v2.
>
Bunch of comments below to update your driver to latest styles and best
practices.
Cheers, Daniel
> drivers/gpu/drm/Kconfig| 2 +
> drivers/gpu/drm/Makefile | 1 +
> drivers/gpu/drm/arc/Kconfig| 10 ++
> drivers/gpu/drm/arc/Makefile | 2 +
> drivers/gpu/drm/arc/arcpgu.h | 50 +++
> drivers/gpu/drm/arc/arcpgu_crtc.c | 274
> +
> drivers/gpu/drm/arc/arcpgu_drv.c | 252 ++
> drivers/gpu/drm/arc/arcpgu_fbdev.c | 245 +
> drivers/gpu/drm/arc/arcpgu_hdmi.c | 207
> drivers/gpu/drm/arc/arcpgu_regs.h | 36 +
> 10 files changed, 1079 insertions(+)
> create mode 100644 drivers/gpu/drm/arc/Kconfig
> create mode 100644 drivers/gpu/drm/arc/Makefile
> create mode 100644 drivers/gpu/drm/arc/arcpgu.h
> create mode 100644 drivers/gpu/drm/arc/arcpgu_crtc.c
> create mode 100644 drivers/gpu/drm/arc/arcpgu_drv.c
> create mode 100644 drivers/gpu/drm/arc/arcpgu_fbdev.c
> create mode 100644 drivers/gpu/drm/arc/arcpgu_hdmi.c
> create mode 100644 drivers/gpu/drm/arc/arcpgu_regs.h
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index f2a74d0..9e4f2f1 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -281,3 +281,5 @@ source "drivers/gpu/drm/imx/Kconfig"
> source "drivers/gpu/drm/vc4/Kconfig"
>
> source "drivers/gpu/drm/etnaviv/Kconfig"
> +
> +source "drivers/gpu/drm/arc/Kconfig"
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index 6eb94fc..c338d04 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -78,3 +78,4 @@ obj-y += panel/
> obj-y+= bridge/
> obj-$(CONFIG_DRM_FSL_DCU) += fsl-dcu/
> obj-$(CONFIG_DRM_ETNAVIV) += etnaviv/
> +obj-$(CONFIG_DRM_ARCPGU)+= arc/
> diff --git a/drivers/gpu/drm/arc/Kconfig b/drivers/gpu/drm/arc/Kconfig
> new file mode 100644
> index 000..f9a13b6
> --- /dev/null
> +++ b/drivers/gpu/drm/arc/Kconfig
> @@ -0,0 +1,10 @@
> +config DRM_ARCPGU
> + tristate "ARC PGU"
> + depends on DRM && OF
> + select DRM_KMS_CMA_HELPER
> + select DRM_KMS_FB_HELPER
> + select DRM_KMS_HELPER
> + help
> + Choose this option if you have an ARC PGU controller.
> +
> + If M is selected the module will be called arcpgu.
> diff --git a/drivers/gpu/drm/arc/Makefile b/drivers/gpu/drm/arc/Makefile
> new file mode 100644
> index 000..736ee6f
> --- /dev/null
> +++ b/drivers/gpu/drm/arc/Makefile
> @@ -0,0 +1,2 @@
> +arcpgu-y := arcpgu_crtc.o arcpgu_hdmi.o arcpgu_fbdev.o arcpgu_drv.o
> +obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o
> diff --git a/drivers/gpu/drm/arc/arcpgu.h b/drivers/gpu/drm/arc/arcpgu.h
> new file mode 100644
> index 000..86574b6
> --- /dev/null
> +++ b/drivers/gpu/drm/arc/arcpgu.h
> @@ -0,0 +1,50 @@
> +/*
> + * ARC PGU DRM driver.
> + *
> + * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef _ARCPGU_H_
> +#define _ARCPGU_H_
> +
> +struct arcpgu_drm_private {
> + void __iomem*regs;
> + struct clk *clk;
> + struct drm_fbdev_cma*fbdev;
> + struct drm_framebuffer *fb;
> + struct list_headevent_list;
> + struct drm_crtc crtc;
> + struct drm_plane*plane;
> +};
> +
> +#define crtc_to_arcpgu_priv(x) container_of(x, struct arcpgu_drm_private,
> crtc)
> +
> +static inline void arc_pgu_write(struct arcpgu_drm_private *arcpgu,
> + unsigned int reg, u32 value)
> +{
> + iowrite32(value, arcpgu->regs + reg);
> +}
> +
> +static inline u32 arc_pgu_read(struct arcpgu_drm_private *arcpgu,
> +unsigned int reg)
> +{
> + return ioread32(arcpgu->regs + reg);
> +}
> +
>
Re: [PATCH] mm: slub: Ensure that slab_unlock() is atomic
On Wednesday 09 March 2016 05:10 PM, Peter Zijlstra wrote: > --- > Subject: bitops: Do not default to __clear_bit() for __clear_bit_unlock() > > __clear_bit_unlock() is a special little snowflake. While it carries the > non-atomic '__' prefix, it is specifically documented to pair with > test_and_set_bit() and therefore should be 'somewhat' atomic. > > Therefore the generic implementation of __clear_bit_unlock() cannot use > the fully non-atomic __clear_bit() as a default. > > If an arch is able to do better; is must provide an implementation of > __clear_bit_unlock() itself. > > Specifically, this came up as a result of hackbench livelock'ing in > slab_lock() on ARC with SMP + SLUB + !LLSC. > > The issue was incorrect pairing of atomic ops. > > slab_lock() -> bit_spin_lock() -> test_and_set_bit() > slab_unlock() -> __bit_spin_unlock() -> __clear_bit() > > The non serializing __clear_bit() was getting "lost" > > 80543b8e: ld_s r2,[r13,0] <--- (A) Finds PG_locked is set > 80543b90: or r3,r2,1<--- (B) other core unlocks right here > 80543b94: st_s r3,[r13,0] <--- (C) sets PG_locked (overwrites > unlock) > > Fixes ARC STAR 9000817404 (and probably more). > > Cc: sta...@vger.kernel.org > Reported-by: Vineet Gupta > Tested-by: Vineet Gupta > Signed-off-by: Peter Zijlstra (Intel) Peter, I don't see this in linux-next yet. I'm hoping you will send it Linus' way for 4.6-rc1. Thx, -Vineet ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
kisskb: FAILED linux-next/axs101_defconfig/arcompact Mon Mar 14, 19:26
FAILED linux-next/axs101_defconfig/arcompact Mon Mar 14, 19:26 http://kisskb.ellerman.id.au/kisskb/buildresult/12633624/ Commit: Add linux-next specific files for 20160314 4342eec3c5a2402ca5de3d6e56f541fe1c5171e2 Compiler: arc-buildroot-linux-uclibc-gcc (Buildroot 2015.08.1) 4.8.4 Possible errors --- arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[3]: *** [net/ethernet/eth.o] Error 1 make[2]: *** [net/ethernet] Error 2 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[3]: *** [drivers/of/device.o] Error 1 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[2]: *** [lib/pci_iomap.o] Error 1 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[2]: *** [lib/devres.o] Error 1 make[1]: *** [lib] Error 2 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[3]: *** [net/core/dev.o] Error 1 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[5]: *** [drivers/video/fbdev/core/fbmon.o] Error 1 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[6]: *** [drivers/net/ethernet/stmicro/stmmac/stmmac_main.o] Error 1 make[5]: *** [drivers/net/ethernet/stmicro/stmmac] Error 2 make[4]: *** [drivers/net/ethernet/stmicro] Error 2 make[3]: *** [drivers/net/ethernet] Error 2 make[2]: *** [drivers/of] Error 2 make[4]: *** [drivers/video/fbdev/core] Error 2 make[3]: *** [drivers/video/fbdev] Error 2 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[3]: *** [drivers/scsi/scsi_lib.o] Error 1 make[2]: *** [net/core] Error 2 make[1]: *** [net] Error 2 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[4]: *** [drivers/usb/host/ehci-hcd.o] Error 1 make[3]: *** [drivers/usb/host] Error 2 arch/arc/include/asm/pci.h:13:40: fatal error: asm-generic/pci-dma-compat.h: No such file or directory make[4]: *** [drivers/usb/core/message.o] Error 1 make[2]: *** [drivers/net] Error 2 make[2]: *** [drivers/scsi] Error 2 make[2]: *** [drivers/video] Error 2 make[3]: *** [drivers/usb/core] Error 2 make[2]: *** [drivers/usb] Error 2 make[1]: *** [drivers] Error 2 make: *** [sub-make] Error 2 Possible warnings (91) -- drivers/pci/pcie/Kconfig:61:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:67:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:74:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:61:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:67:warning: choice value used outside its choice group drivers/pci/pcie/Kconfig:74:warning: choice value used outside its choice group :1310:2: warning: #warning syscall preadv2 not implemented [-Wcpp] :1313:2: warning: #warning syscall pwritev2 not implemented [-Wcpp] Warning (unit_address_vs_reg): Node /timer@0 has a unit name, but no reg property Warning (unit_address_vs_reg): Node /timer@1 has a unit name, but no reg property Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name Warning (unit_address_vs_reg): Node /cpu_card has a reg or ranges property, but no unit name Warning (unit_address_vs_reg): Node /cpu_card/arc700-intc@cpu has a unit name, but no reg property Warning (unit_address_vs_reg): Node /axs10x_mb has a reg or ranges property, but no unit name arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] kernel/sysctl.c:1958:12: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized] kernel/sched/core.c:3080:1: warning: control reaches end of non-void function [-Wreturn-type] arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] kernel/sysctl.c:1958:12: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized] arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] arch/arc/include/asm/tlbflush.h:29:0: warning: "flush_pmd_tlb_range" redefined [enabled by default] kernel/time/posix-cpu-timers.c:787:21: war
Re: [PATCH 1/4 v3] drm: Add support of ARC PGU display controller
Hi Daniel,
On Mon, 2016-03-14 at 08:00 +0100, Daniel Vetter wrote:
> On Fri, Mar 11, 2016 at 06:42:36PM +0300, Alexey Brodkin wrote:
> >
> > ARC PGU could be found on some development boards from Synopsys.
> > This is a simple byte streamer that reads data from a framebuffer
> > and sends data to the single encoder.
> >
> > Signed-off-by: Alexey Brodkin
> > Cc: David Airlie
> > Cc: dri-de...@lists.freedesktop.org
> > Cc: linux-snps-arc@lists.infradead.org
> > Cc: Jose Abreu
> > ---
> >
> > Changes v2 -> v3:
> > * Improved failure path if arcpgu_connector wasn't allocated (thanks Jose).
> > * Fixed driver building as module (reported by 0-DAY kernel test
> > infrastruct.)
> > * Implemented uncached mapping of user-space FB pages.
> >
> > No changes v1 -> v2.
> >
> Bunch of comments below to update your driver to latest styles and best
> practices.
>
> Cheers, Daniel
Thanks for doing that review!
> > +
> > +static void arc_pgu_crtc_atomic_flush(struct drm_crtc *crtc,
> > + struct drm_crtc_state *state)
> > +{
> > +}
> > +
> > +static bool arc_pgu_crtc_mode_fixup(struct drm_crtc *crtc,
> > + const struct drm_display_mode *mode,
> > + struct drm_display_mode *adjusted_mode)
> > +{
> > + return true;
> > +}
> You can drop the above 2 dummy functions.
Ok will do.
> >
> > +
> > +static const struct drm_crtc_helper_funcs arc_pgu_crtc_helper_funcs = {
> > + .mode_fixup = arc_pgu_crtc_mode_fixup,
> > + .mode_set = drm_helper_crtc_mode_set,
> > + .mode_set_base = drm_helper_crtc_mode_set_base,
> > + .mode_set_nofb = arc_pgu_crtc_mode_set_nofb,
> > + .enable = arc_pgu_crtc_enable,
> > + .disable= arc_pgu_crtc_disable,
> > + .prepare= arc_pgu_crtc_disable,
> > + .commit = arc_pgu_crtc_enable,
> > + .atomic_check = arc_pgu_crtc_atomic_check,
> > + .atomic_begin = arc_pgu_crtc_atomic_begin,
> > + .atomic_flush = arc_pgu_crtc_atomic_flush,
> > +};
> > +
> > +static int arc_pgu_plane_atomic_check(struct drm_plane *plane,
> > + struct drm_plane_state *state)
> > +{
> > + return 0;
> > +}
> You don't need dummy functions for this.
Ditto.
> > +
> > +void arc_pgu_crtc_suspend(struct drm_crtc *crtc)
> > +{
> > + arc_pgu_crtc_disable(crtc);
> > +}
> > +
> > +void arc_pgu_crtc_resume(struct drm_crtc *crtc)
> > +{
> > + arc_pgu_crtc_enable(crtc);
> > +}
> Please use the atomic suspend/resume helper that Thierry recently merged.
> See the kerneldoc of drm_atomic_helper_suspend as a starting point for how
> it works and how it's supposed to be used.
Well looks like this is a reminder if dummy copy-paste.
We don't support PM in that driver yet, so I'll remove both functions
for now.
> > +static int arcpgu_atomic_commit(struct drm_device *dev,
> > + struct drm_atomic_state *state, bool async)
> > +{
> > + return drm_atomic_helper_commit(dev, state, false);
> Note that this isn't really async if you ever get around to implement
> fence support or vblank support. Just fyi.
Ok but for now should I leave it as it is?
> > +static struct drm_driver arcpgu_drm_driver = {
> > + .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
> > + DRIVER_ATOMIC,
> > + .preclose = arcpgu_preclose,
> > + .lastclose = arcpgu_lastclose,
> > + .name = "drm-arcpgu",
> > + .desc = "ARC PGU Controller",
> > + .date = "20160219",
> > + .major = 1,
> > + .minor = 0,
> > + .patchlevel = 0,
> > + .fops = &arcpgu_drm_ops,
> > + .load = arcpgu_load,
> > + .unload = arcpgu_unload,
> Load and unload hooks are deprecated (it's a classic midlayer mistake).
> Please use drm_dev_alloc/register pairs directly instead, and put your
> device setup code in-between. Similar for unloading. There's a bunch of
> example drivers converted already.
Ok I took "atmel-hlcdc" as example.
And that's interesting.
If I put my arcpgu_load() in between drm_dev_alloc() and
drm_dev_register() then I'm getting this on the driver probe:
-->8---
[drm] Initialized drm 1.1.0 20060810
arcpgu e0017000.pgu: arc_pgu ID: 0xabbabaab
[ cut here ]
WARNING: CPU: 0 PID: 1 at lib/kobject.c:244 kobject_add_internal+0x17c/0x498()
kobject_add_internal failed for card0-HDMI-A-1 (error: -2 parent: card0)
Modules linked in:
CPU: 0 PID: 1 Comm: swapper Not tainted 4.5.0-rc3-01062-ga447822-dirty #17
Stack Trace:
arc_unwind_core.constprop.1+0xa4/0x110
warn_slowpath_fmt+0x6e/0xfc
kobject_add_internal+0x17c/0x498
kobject_add+0x98/0xe4
device_add+0xc6/0x734
device_create_with_groups+0x12a/0x144
drm_sysfs_connector_add+0x54/0xe8
arcpgu_drm_hdmi_init+0xd4/0x17c
arcpgu_probe+0x138/0x24c
platform_drv_probe+0x2e/0x6c
really_probe+0x212/0x35c
__driver_attach+0x90/0x94
bus_for_each_dev+0x46/0x80
bus_add_d
[PATCH] arc: use ezchip network driver
Since ezchip network driver was adapted to little endian architecture
this patch provides the corresponding arch/arc/{boot/dts,configs}/ updates so
we can switch over to this device-model/driver for OSCI platform.
Signed-off-by: Lada Trimasova
Cc: Alexey Brodkin
Cc: Vineet Gupta :
---
arch/arc/boot/dts/nsimosci.dts | 5 ++---
arch/arc/boot/dts/nsimosci_hs.dts | 5 ++---
arch/arc/boot/dts/nsimosci_hs_idu.dts | 5 ++---
arch/arc/configs/nsimosci_defconfig| 1 +
arch/arc/configs/nsimosci_hs_defconfig | 1 +
arch/arc/configs/nsimosci_hs_smp_defconfig | 1 +
6 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/arch/arc/boot/dts/nsimosci.dts b/arch/arc/boot/dts/nsimosci.dts
index 1c169dc..d94b4ce 100644
--- a/arch/arc/boot/dts/nsimosci.dts
+++ b/arch/arc/boot/dts/nsimosci.dts
@@ -65,10 +65,9 @@
};
eth0: ethernet@f0003000 {
- compatible = "snps,oscilan";
+ compatible = "ezchip,nps-mgt-enet";
reg = <0xf0003000 0x44>;
- interrupts = <7>, <8>;
- interrupt-names = "rx", "tx";
+ interrupts = <7>;
};
};
};
diff --git a/arch/arc/boot/dts/nsimosci_hs.dts
b/arch/arc/boot/dts/nsimosci_hs.dts
index d64a96f..034a313 100644
--- a/arch/arc/boot/dts/nsimosci_hs.dts
+++ b/arch/arc/boot/dts/nsimosci_hs.dts
@@ -65,10 +65,9 @@
};
eth0: ethernet@f0003000 {
- compatible = "snps,oscilan";
+ compatible = "ezchip,nps-mgt-enet";
reg = <0xf0003000 0x44>;
- interrupts = <25>, <26>;
- interrupt-names = "rx", "tx";
+ interrupts = <25>;
};
arcpct0: pct {
diff --git a/arch/arc/boot/dts/nsimosci_hs_idu.dts
b/arch/arc/boot/dts/nsimosci_hs_idu.dts
index f6bf0ca..8a1297e 100644
--- a/arch/arc/boot/dts/nsimosci_hs_idu.dts
+++ b/arch/arc/boot/dts/nsimosci_hs_idu.dts
@@ -85,11 +85,10 @@
};
eth0: ethernet@f0003000 {
- compatible = "snps,oscilan";
+ compatible = "ezchip,nps-mgt-enet";
reg = <0xf0003000 0x44>;
interrupt-parent = <&idu_intc>;
- interrupts = <1 2>, <2 2>;
- interrupt-names = "rx", "tx";
+ interrupts = <1 2>;
};
arcpct0: pct {
diff --git a/arch/arc/configs/nsimosci_defconfig
b/arch/arc/configs/nsimosci_defconfig
index 646182e..97dfc30 100644
--- a/arch/arc/configs/nsimosci_defconfig
+++ b/arch/arc/configs/nsimosci_defconfig
@@ -27,6 +27,7 @@ CONFIG_ARC_PLAT_SIM=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci"
# CONFIG_COMPACTION is not set
CONFIG_NET=y
+CONFIG_EZCHIP_NPS_MANAGEMENT_ENET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
diff --git a/arch/arc/configs/nsimosci_hs_defconfig
b/arch/arc/configs/nsimosci_hs_defconfig
index ceca254..55e2892 100644
--- a/arch/arc/configs/nsimosci_hs_defconfig
+++ b/arch/arc/configs/nsimosci_hs_defconfig
@@ -28,6 +28,7 @@ CONFIG_ISA_ARCV2=y
CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs"
# CONFIG_COMPACTION is not set
CONFIG_NET=y
+CONFIG_EZCHIP_NPS_MANAGEMENT_ENET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_UNIX_DIAG=y
diff --git a/arch/arc/configs/nsimosci_hs_smp_defconfig
b/arch/arc/configs/nsimosci_hs_smp_defconfig
index 4b6da90..74a3e48 100644
--- a/arch/arc/configs/nsimosci_hs_smp_defconfig
+++ b/arch/arc/configs/nsimosci_hs_smp_defconfig
@@ -25,6 +25,7 @@ CONFIG_ARC_BUILTIN_DTB_NAME="nsimosci_hs_idu"
CONFIG_PREEMPT=y
# CONFIG_COMPACTION is not set
CONFIG_NET=y
+CONFIG_EZCHIP_NPS_MANAGEMENT_ENET=y
CONFIG_PACKET=y
CONFIG_PACKET_DIAG=y
CONFIG_UNIX=y
--
2.5.0
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