Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753997AbbKBPUx (ORCPT ); Mon, 2 Nov 2015 10:20:53 -0500 Received: from mail-yk0-f178.google.com ([209.85.160.178]:35148 "EHLO mail-yk0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753210AbbKBPUv (ORCPT ); Mon, 2 Nov 2015 10:20:51 -0500 MIME-Version: 1.0 In-Reply-To: <20151031212259.GA6253@amd> References: <20151031201344.GA30459@amd> <563522C5.1000206@amd.com> <20151031212259.GA6253@amd> Date: Mon, 2 Nov 2015 10:20:50 -0500 Message-ID: Subject: Re: Mobility Radeon HD 4530/4570/545v: flicker in 1920x1080 From: Alex Deucher To: Pavel Machek Cc: =?UTF-8?Q?Christian_K=C3=B6nig?= , "Deucher, Alexander" , "linux-fbdev@vger.kernel.org" , kernel list , Maling list - DRI developers Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6592 Lines: 170 On Sat, Oct 31, 2015 at 5:22 PM, Pavel Machek wrote: > Hi! > >> >4.3-rc7 kernel, graphics works reasonably well in 1600x1200 mode. But >> >my monitor is native 1920x1080, so that mode looks pretty ugly on >> >screen. If I go to 1920x1080, I see colored horizontal lines (often >> >black) as soon as there's graphics activity. >> > >> >pavel@half:~$ xrandr >> >Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 >> >VGA-0 connected 1920x1080+0+0 (normal left inverted right x axis y >> >axis) 478mm x 268mm >> > 1920x1080 60.00*+ >> > 1600x1200 60.00 >> > 1680x1050 59.95 >> > 1280x1024 75.02 60.02 >> > 1440x900 59.89 >> > 1024x768 75.08 60.00 >> > 800x600 75.00 60.32 >> > 640x480 75.00 60.00 >> > 720x400 70.08 >> > pavel@half:~$ xrandr --output VGA-0 --mode 1600x1200 >> > pavel@half:~$ xrandr --output VGA-0 --mode 1920x1080 >> > pavel@half:~$ xrandr --output VGA-0 --mode 1600x1200 >> > >> > >> >This is Acer notebook, >> > >> >01:00.0 VGA compatible controller: Advanced Micro Devices, >> >Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v] > >> >Any ideas? >> >> Alex probably knows more about this, but it sounds like problems with >> switching the memory clocks on 3D load. > >> Try to disable power management completely with radeon.dpm=0 on the kernel >> command line or nailing the hardware at a specific power level using >> sysfs. > > I tried that, but it still flickers. It's probably pll stability. There seem to be a number of regressions since the pll code was rewritten to support matching the hdmi clocks more closely. Does this patch help? diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index dac78ad..b86f06a 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -569,6 +569,8 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc, radeon_crtc->pll_flags = 0; if (ASIC_IS_AVIVO(rdev)) { + radeon_crtc->pll_flags |= RADEON_PLL_PREFER_MINM_OVER_MAXP; + if ((rdev->family == CHIP_RS600) || (rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740)) Unfortunately, it can't be applied as is because we had a similar patch which was reverted because it regressed a bunch of other systems. The actual pll limits probably need to be tweaked. Alex > > pavel@half:~/misc/fgfs$ cat /proc/cmdline > BOOT_IMAGE=(hd0,2)/l/linux/arch/x86/boot/bzImage root=/dev/sda4 > resume=/dev/sda1 radeon.dpm=0 > >> Power consumption would be totally awkward, but it should help nailing down >> the problem. > > It seems chromium makes the flicker way worse.. even when running on > different virtual desktop. I'm not sure which sysfs settings I should > tweak (or if I should be tweaking them with .dpm=0). But sysfs says: > pavel@half:/sys/bus/pci/drivers/radeon/0000:01:00.0$ ls > backlight drm > irq > resource > boot_vga enable local_cpulist resource0 > broken_parity_status firmware_node local_cpus resource0_wc > class graphics > modalias resource1 > config > i2c-0 msi_bus resource2 > consistent_dma_mask_bits i2c-1 power rom > d3cold_allowed i2c-2 > power_method subsystem > device > i2c-3 power_profile subsystem_device > dma_mask_bits i2c-4 remove > subsystem_vendor > driver i2c-5 rescan uevent > driver_override i2c-6 reset > vendor > pavel@half:/sys/bus/pci/drivers/radeon/0000:01:00.0$ grep . * > grep: backlight: Is a directory > boot_vga:1 > broken_parity_status:0 > class:0x030000 > Binary file config matches > consistent_dma_mask_bits:40 > d3cold_allowed:1 > device:0x9553 > dma_mask_bits:40 > grep: driver: Is a directory > driver_override:(null) > grep: drm: Is a directory > enable:1 > grep: firmware_node: Is a directory > grep: graphics: Is a directory > grep: i2c-0: Is a directory > grep: i2c-1: Is a directory > grep: i2c-2: Is a directory > grep: i2c-3: Is a directory > grep: i2c-4: Is a directory > grep: i2c-5: Is a directory > grep: i2c-6: Is a directory > irq:16 > local_cpulist:0-3 > local_cpus:f > modalias:pci:v00001002d00009553sv00001025sd00000212bc03sc00i00 > msi_bus:1 > grep: power: Is a directory > power_method:profile > power_profile:default > grep: remove: Permission denied > grep: rescan: Permission denied > grep: reset: Permission denied > resource:0x00000000c0000000 0x00000000cfffffff 0x0000000000042208 > resource:0x0000000000005000 0x00000000000050ff 0x0000000000040101 > resource:0x00000000d6200000 0x00000000d620ffff 0x0000000000040200 > resource:0x0000000000000000 0x0000000000000000 0x0000000000000000 > resource:0x0000000000000000 0x0000000000000000 0x0000000000000000 > resource:0x0000000000000000 0x0000000000000000 0x0000000000000000 > resource:0x00000000d6220000 0x00000000d623ffff 0x0000000000046202 > grep: resource0: Permission denied > grep: resource0_wc: Permission denied > grep: resource1: Permission denied > grep: resource2: Permission denied > grep: rom: Permission denied > grep: subsystem: Is a directory > subsystem_device:0x0212 > subsystem_vendor:0x1025 > uevent:DRIVER=radeon > uevent:PCI_CLASS=30000 > uevent:PCI_ID=1002:9553 > uevent:PCI_SUBSYS_ID=1025:0212 > uevent:PCI_SLOT_NAME=0000:01:00.0 > uevent:MODALIAS=pci:v00001002d00009553sv00001025sd00000212bc03sc00i00 > vendor:0x1002 > > Thanks, > Pavel > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/dri-devel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/