From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jani Nikula Subject: Re: [PATCH] drm/i915: More cautious with pch fifo underruns Date: Tue, 02 Dec 2014 15:22:44 +0200 Message-ID: <87h9xenq3f.fsf@intel.com> References: <1416844965-10284-1-git-send-email-daniel.vetter@ffwll.ch> <20141126181731.GR32117@phenom.ffwll.local> <20141201163643.GB32117@phenom.ffwll.local> <20141201172755.GK32117@phenom.ffwll.local> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTP id DC1BA6E8CA for ; Tue, 2 Dec 2014 05:22:35 -0800 (PST) In-Reply-To: <20141201172755.GK32117@phenom.ffwll.local> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Daniel Vetter , Paulo Zanoni Cc: Daniel Vetter , Intel Graphics Development , Daniel Vetter List-Id: intel-gfx@lists.freedesktop.org T24gTW9uLCAwMSBEZWMgMjAxNCwgRGFuaWVsIFZldHRlciA8ZGFuaWVsQGZmd2xsLmNoPiB3cm90 ZToKPiBPbiBNb24sIERlYyAwMSwgMjAxNCBhdCAwMzowNDo1MFBNIC0wMjAwLCBQYXVsbyBaYW5v bmkgd3JvdGU6Cj4+IDIwMTQtMTItMDEgMTQ6MzYgR01ULTAyOjAwIERhbmllbCBWZXR0ZXIgPGRh bmllbEBmZndsbC5jaD46Cj4+ID4gT24gTW9uLCBEZWMgMDEsIDIwMTQgYXQgMTE6NDE6NDJBTSAt MDIwMCwgUGF1bG8gWmFub25pIHdyb3RlOgo+PiA+PiAyMDE0LTExLTI2IDE2OjE3IEdNVC0wMjow MCBEYW5pZWwgVmV0dGVyIDxkYW5pZWxAZmZ3bGwuY2g+Ogo+PiA+PiA+IE9uIFdlZCwgTm92IDI2 LCAyMDE0IGF0IDAxOjM3OjA3UE0gLTAyMDAsIFBhdWxvIFphbm9uaSB3cm90ZToKPj4gPj4gPj4g MjAxNC0xMS0yNCAxNDowMiBHTVQtMDI6MDAgRGFuaWVsIFZldHRlciA8ZGFuaWVsLnZldHRlckBm ZndsbC5jaD46Cj4+ID4+ID4+ID4gQXBwYXJlbnRseSBQQ0ggZmlmbyB1bmRlcnJ1bnMgYXJlIHRy aWNreSwgd2UgaGF2ZSBwbGVudHkgcmVwb3J0cyB0aGF0Cj4+ID4+ID4+ID4gd2Ugc2VlIHRoZSBv Y2Nhc2lvbmFsIHVuZGVycnVuIChlc3BlY2lhbGx5IGF0IGJvb3QtdXApLgo+PiA+PiA+PiA+Cj4+ ID4+ID4+ID4gU28gZm9yIGEgY2hhbmdlIGxldCdzIHNlZSB3aGF0IGhhcHBlbnMgd2hlbiB3ZSBk b24ndCByZS1lbmFibGUgcGNoCj4+ID4+ID4+ID4gZmlmbyB1bmRlcnJ1biByZXBvcnRpbmcgd2hl biB0aGUgcGlwZSBpcyBkaXNhYmxlZC4KPj4gPj4gPj4KPj4gPj4gPj4gRG9lcyB0aGF0IG1lYW4g eW91IGRvbid0IHJlYWxseSBrbm93IGlmIHRoaXMgcGF0Y2ggaXMgZ29pbmcgdG8gZml4IHNvbWV0 aGluZz8KPj4gPj4gPj4KPj4gPj4gPj4gSSBzZWUgd2hhdCB0aGlzIHBhdGNoIGRvZXMsIGJ1dCBJ IGRvbid0IHJlYWxseSBzZWUgd2hhdCBpcyBpdHMKPj4gPj4gPj4gYmVuZWZpdCwgYmVzaWRlcyAi d2UnbGwgZ2V0IGxlc3MgYnVnIHJlcG9ydHMiLiBJcyB0aGVyZSBhbnkgcmVhc29uIHdoeQo+PiA+ PiA+PiB0aGUgdW5kZXJydW5zIGFyZSBleHBlY3RlZCB0byBoYXBwZW4gYXQgdGhpcyB0aW1lPwo+ PiA+PiA+Pgo+PiA+PiA+PiBQbGVhc2UgZXhwbGFpbiBhIGxpdHRsZSBtb3JlLgo+PiA+PiA+Cj4+ ID4+ID4gTm8gcmVhc29uIHJlYWxseSBiZXlvbmQgImxlc3MgYnVnIHJlcG9ydHMiIGFuZCAibm8g cmVkdWN0aW9uIGluIHVuZGVycnVuCj4+ID4+ID4gcmVwb3J0aW5nIGFiaWxpdGllcyB3aGVuIHRo ZSBwaXBlIGlzIGFjdHVhbGx5IGVuYWJsZWQiLiBPbmx5IGEgcmVkdWN0aW9uCj4+ID4+ID4gaW4g aG93IHF1aWNrbHkgd2UnbGwgbm90aWNlIGFuIHVuZGVycnVuLCBidXQgc2luY2Ugd2UgbW9zdGx5 IG5lZWQgY3B1IGZpZm8KPj4gPj4gPiB1bmRlcnJ1bnMgZm9yIGRlYnVnZ2luZyB3bSBpc3N1ZXMg SSBkb24ndCB0aGluayB0aGF0IGhhcyBhbiBpbXBhY3QgZm9yCj4+ID4+ID4gZGV2ZWxvcGVycyBl aXRoZXIuIGZpZm8gdW5kZXJydW5zIGFyZSB1c2VmdWwgZm9yIGRlYnVnZ2luZyBzb21lIG1vZGVz ZXQKPj4gPj4gPiBpc3N1ZXMsIGJ1dCBhcyBzb29uIGFzIHlvdSBkbyBtb2Rlc2V0IHdlJ2xsIHNw b3QgdGhlIHVuZGVycnVuLgo+PiA+PiA+Cj4+ID4+ID4+ID4gVGhpcyBtZWFucyB0aGF0IHRoZQo+ PiA+PiA+PiA+IGtlcm5lbCBjYW4ndCBjYXRjaCBwY2ggZmlmbyB1bmRlcnJ1bnMgd2hlbiB0aGV5 IGhhcHBlbiAoZXhjZXB0IHdoZW4KPj4gPj4gPj4gPiBhbGwgcGlwZXMgYXJlIG9uIG9uIHRoZSBw Y2gpLiBCdXQgd2UnbGwgc3RpbGwgY2F0Y2ggdW5kZXJydW5zIHdoZW4KPj4gPj4gPj4gPiBkaXNh YmxpbmcgdGhlIHBpcGUgYWdhaW4uCj4+ID4+ID4+Cj4+ID4+ID4+IEFyZSB5b3Ugc3VyZSB0aGUg c2VudGVuY2VzIGFib3ZlIGFyZSBjb3JyZWN0Pwo+PiA+PiA+Cj4+ID4+ID4gV2UgYWx3YXlzIHJl LWVuYWJsZSB1bmRlcnJ1biByZXBvcnRpbmcgaW4gdGhlIGNydGNfZW5hYmxlIGhvb2tzLiBUaGF0 Cj4+ID4+ID4gc3RpbGwgZG9lc24ndCBlbmFibGUgdGhlIGludGVycnVwdHMgKHdoZW4gc29tZSBv dGhlciBwY2ggcGlwZSBpcyBvZmYpLCBidXQKPj4gPj4gPiBpdCB1cGRhdGVzIHRoZSBzdyB0cmFj a2luZy4KPj4gPj4gPgo+PiA+PiA+IFdoZW4gd2UgYWdhaW4gZGlzYWJsZSB0aGUgZmlmbyB1bmRl cnJ1biByZXBvcnRpbmcgd2UgZG8gY2hlY2sgdGhlIHN0YXR1cwo+PiA+PiA+IGJpdHMsIHNvIGlm IGFuIHVuZGVycnVuIGhhcHBlbmVkIHdlIHdvbid0IGdldCB0aGUgaW50ZXJydXB0IHJpZ2h0IGF3 YXkuCj4+ID4+ID4gQnV0IHdoZW4geW91IHNodXQgZG93biB0aGUgcGlwZSB3ZSdsbCBub3RpY2Ug dGhhdCBhbiBpbnRlcnJ1cHQgaGFwcGVuZWQuCj4+ID4+ID4KPj4gPj4gPiBTbyB5ZWFoLCB0aGUg YWJvdmUgY2xhaW0gc2hvdWxkIGJlIGNvcnJlY3QuCj4+ID4+ID4KPj4gPj4gPj4gPiBTbyBub3Qg YSB0ZXJyaWJsZSByZWR1Y3Rpb24gaW4gdGVzdAo+PiA+PiA+PiA+IGNvdmVyYWdlLgo+PiA+PiA+ Pgo+PiA+PiA+PiBZZWFoLCBJIGFncmVlLCBidXQgcGxlYXNlIHByb3ZpZGUgYSBuaWNlIHJlYXNv biBmb3IgaXQgOikKPj4gPj4gPgo+PiA+PiA+IFNlZSBteSByZXBseSB0byB0aGlzIHBhdGNoLCBh IGJ1ZyByZXBvcnRlciBjYW1lIGFyb3VuZCBhbmQgdGVzdGVkIHRoaXMgYXMKPj4gPj4gPiAiaXQg d29ya3MiLiBJIHJlYWxseSBkbyBzZW5kIG91dCBwYXRjaGVzIHdpdGhvdXQgdGVzdGluZyB0aGVt IGF0IGFsbCBmb3IKPj4gPj4gPiBidWcgdGVhbSB3b3JrIDstKQo+PiA+Pgo+PiA+PiBCdXQgd2h5 IGRvZXMgaGUgc2F5IGl0IHdvcmtzPyBBcmVuJ3Qgd2UganVzdCBkZWxheWluZyB0aGUgRFJNX0VS Uk9SIG1lc3NhZ2U/Cj4+ID4KPj4gPiBCZWZvcmUgd2Ugb25seSBkaXNhYmxlZCBwY2ggdW5kZXJy dW5zIHdoaWxlIHdlIGRpc2FibGUgdGhlIHBjaC4gQnV0IGF0IHRoZQo+PiA+IGVuZCBvZiB0aGUg LT5jcnRjX2Rpc2FibGUgaG9vayBwY2ggdW5kZXJydW4gcmVwb3J0aW5nIGlzIGVuYWJsZWQuCj4+ ID4KPj4gPiBXaXRoIG15IHBhdGNoIHdlIGtlZXAgcGNoIHVuZGVycnVuIHJlcG9ydGluZyBkaXNh YmxlZCB1bnRpbCAtPmNydGNfZW5hYmxlLgo+PiA+IEl0IHNlZW1zIGxpa2UgZG9pbmcgYSBtb2Rl c2V0IG9uIHRoZSBvdGhlciBwaXBlIGFsc28gZ2l2ZXMgdXMgdW5kZXJydW5zIG9uCj4+ID4gZGlz YWJsZWQgcGlwZXMgc29tZWhvdy4gT3IgYXQgbGVhc3QgdGhhdCdzIG15IChiYWQpIHRoZW9yeS4K Pj4gCj4+IEkgZ3Vlc3MgeW91IGNvbnZpbmNlZCBtZSBvbiBJUkMgdGhhdCB0aGlzIGlzIGJldHRl ciB0aGFuIHJldmVydGluZyB0aGUKPj4gRFJNX0VSUk9SIHRvIERSTV9ERUJVR19LTVMuCj4+IAo+ PiBBbnl3YXksIHRoZSBwYXRjaCBkb2VzIHdoYXQgaXQgc2F5cyBhbmQgZG9lc24ndCBzZWVtIHRv IGFkZCBhbnkKPj4gcmVncmVzc2lvbnMsIHNvIFJldmlld2VkLWJ5OiBQYXVsbyBaYW5vbmkgPHBh dWxvLnIuemFub25pQGludGVsLmNvbT4uCj4KPiBTaW5jZSB0aGlzIGRtZXNnIG5vaXNlIGlzIGEg cmVncmVzc2lvbiwgYWxzbyBDYzogc3RhYmxlQHZnZXIua2VybmVsLm9yZwo+Cj4gSmFuaSwgY2Fu IHlvdSBwbHMgcGljayB0aGlzIHBhdGNoIHVwPyBQZXJoYXBzIGZvciB0aGUgcmVjb3JkIGl0IHdv dWxkIGJlCj4gYmVzdCB0byBwYXN0ZSB0aGUgZW50aXJlIGRpc2N1c3Npb24gaGVyZSBpbnRvIHRo ZSBjb21taXQgbG9nLCB0b28uCgpQdXNoZWQgdG8gZHJtLWludGVsLWZpeGVzLCB0aGFua3MgZm9y IHRoZSBwYXRjaCBhbmQgcmV2aWV3LgoKQlIsCkphbmkuCgoKPgo+IFRoYW5rcywgRGFuaWVsCj4g LS0gCj4gRGFuaWVsIFZldHRlcgo+IFNvZnR3YXJlIEVuZ2luZWVyLCBJbnRlbCBDb3Jwb3JhdGlv bgo+ICs0MSAoMCkgNzkgMzY1IDU3IDQ4IC0gaHR0cDovL2Jsb2cuZmZ3bGwuY2gKCi0tIApKYW5p IE5pa3VsYSwgSW50ZWwgT3BlbiBTb3VyY2UgVGVjaG5vbG9neSBDZW50ZXIKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4IG1haWxpbmcgbGlz dApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0cy5mcmVlZGVza3Rv cC5vcmcvbWFpbG1hbi9saXN0aW5mby9pbnRlbC1nZngK