search for: 100c1c

...1 of register 100c14 fixes the issue on that card. Other NVAC cards are working great without that trick, and it seems they have that bit enabled by default. What is the role of that bit, and when should it be turned on? Before enabling 100c14's bit 1, the Nvidia driver writes some value into 100c1c. Leaving the default value, or writing some random value seemed to have no effect. What is this register used for? Thanks in advance for your help! Best regards, Pierre Moreau [1]: https://bugs.freedesktop.org/show_bug.cgi?id=27501

...0x00000000 > > NV_PFB_NISO_POLLER_CFG_FLUSH_ENABLE_ENABLED > > 0x00000001 Out of curiosity, what do DNISO and HOSTNB mean? > > > > > Before enabling 100c14's bit 1, the Nvidia driver writes some > > > value > > > into 100c1c. > > > Leaving the default value, or writing some random value seemed to > > > have no > > > effect. What is this register used for? > > > > 100c1c is one of three registers which control the (upper bits of > > the > > 32-byte > > aligned) me...

...SH_ENABLE 16:16 NV_PFB_NISO_POLLER_CFG_FLUSH_ENABLE_DISABLED 0x00000000 NV_PFB_NISO_POLLER_CFG_FLUSH_ENABLE_ENABLED 0x00000001 > Before enabling 100c14's bit 1, the Nvidia driver writes some value into 100c1c. > Leaving the default value, or writing some random value seemed to have no > effect. What is this register used for? 100c1c is one of three registers which control the (upper bits of the 32-byte aligned) memory locations that the pollers use: #define NV_PFB_NISO_POLLER_DNISO_BASE_ADR...

...50: Add PFB writes") This fix a GPU lockup on 9400M (NVAC) when using acceleration, see https://bugs.freedesktop.org/show_bug.cgi?id=27501 v2: - Move code to subdev/fb/nv50.c as suggested by Roy Spliet; - Remove arbitrary writes to 100c18/100c24 as suggested by Roy Spliet; - Replace write to 100c1c of arbitrary value by the address of a scratch page as proposed by Ilia Mirkin; - Remove enabling of bits 16 and 0 as they don't yield in any changes. Signed-off-by: Pierre Moreau <pierre.morrow at free.fr> --- drivers/gpu/drm/nouveau/core/subdev/fb/nv50.c | 11 +++++++++++ 1 file cha...

...1 of register 100c14 fixes the issue on that card. Other NVAC cards are working great without that trick, and it seems they have that bit enabled by default. What is the role of that bit, and when should it be turned on? Before enabling 100c14's bit 1, the Nvidia driver writes some value into 100c1c. Leaving the default value, or writing some random value seemed to have no effect. What is this register used for? Thanks in advance for your help! Best regards, Pierre Moreau [1]: https://bugs.freedesktop.org/show_bug.cgi?id=27501

Signed-off-by: Pierre Moreau <pierre.morrow at free.fr> --- drm/nouveau_drm.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drm/nouveau_drm.c b/drm/nouveau_drm.c index afb93bb..ffa1e4f 100644 --- a/drm/nouveau_drm.c +++ b/drm/nouveau_drm.c @@ -61,9 +61,10 @@ MODULE_PARM_DESC(debug, "debug string to pass to driver core"); static char

...atch "drm/nouveau/fb/nv50: Add PFB writes") This fix a GPU lockup on 9400M (NVAC) when using acceleration, see https://bugs.freedesktop.org/show_bug.cgi?id=27501 v2: - Move code to subdev/fb/nv50.c as suggested by Roy Spliet; - Remove arbitrary writes to 100c18/100c24 - Replace write to 100c1c of arbitrary value by the address of a scratch page as proposed by Ilia Mirkin; - Remove enabling of bits 16 and 0 as they don't yield in any changes. v3: - Move code to subdev/fb/nvaa.c as suggested by Ilia Mirkin. The following changes were made thanks to information provided by Robert Mor...

...B writes") > > This fix a GPU lockup on 9400M (NVAC) when using acceleration, see > https://bugs.freedesktop.org/show_bug.cgi?id=27501 > > v2: > - Move code to subdev/fb/nv50.c as suggested by Roy Spliet; > - Remove arbitrary writes to 100c18/100c24 > - Replace write to 100c1c of arbitrary value by the address of a scratch page > as proposed by Ilia Mirkin; > - Remove enabling of bits 16 and 0 as they don't yield in any changes. > > v3: > - Move code to subdev/fb/nvaa.c as suggested by Ilia Mirkin. > The following changes were made thanks to infor...