This is a note to let you know that I've just added the patch titled
drm/radeon/atom: workaround vbios bug in transmitter table on rs880 (v2)
to the 3.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-atom-workaround-vbios-bug-in-transmitter-table-on-rs880-v2.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 91f3a6aaf280294b07c05dfe606e6c27b7ba3c72 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Mon, 9 Sep 2013 10:54:22 -0400
Subject: drm/radeon/atom: workaround vbios bug in transmitter table on rs880 (v2)
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 91f3a6aaf280294b07c05dfe606e6c27b7ba3c72 upstream.
The OUTPUT_ENABLE action jumps past the point in the coder where
the data_offset is set on certain rs780 cards. This worked
previously because the OUTPUT_ENABLE action is always called
immediately after the ENABLE action so the data_offset remained
set. In 6f8bbaf568c7f2c497558bfd04654c0b9841ad57
(drm/radeon/atom: initialize more atom interpretor elements to 0),
we explictly reset data_offset to 0 between atom calls which then
caused this to fail. The fix is to just skip calling the
OUTPUT_ENABLE action on the problematic chipsets. The ENABLE
action does the same thing and more. Ultimately, we could
probably drop the OUTPUT_ENABLE action all together on DCE3
asics.
fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=60791
v2: only rs880 seems to be affected
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/atombios_encoders.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -1652,8 +1652,12 @@ radeon_atom_encoder_dpms_dig(struct drm_
atombios_dig_encoder_setup(encoder, ATOM_ENABLE, 0);
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_SETUP, 0, 0);
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE, 0, 0);
- /* some early dce3.2 boards have a bug in their transmitter control table */
- if ((rdev->family != CHIP_RV710) && (rdev->family != CHIP_RV730))
+ /* some dce3.x boards have a bug in their transmitter control table.
+ * ACTION_ENABLE_OUTPUT can probably be dropped since ACTION_ENABLE
+ * does the same thing and more.
+ */
+ if ((rdev->family != CHIP_RV710) && (rdev->family != CHIP_RV730) &&
+ (rdev->family != CHIP_RS880))
atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0);
}
if (ENCODER_MODE_IS_DP(atombios_get_encoder_mode(encoder)) && connector) {
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-3.11/radeon-kms-fix-uninitialised-hotplug-work-usage-in-r100_irq_process.patch
queue-3.11/drm-radeon-avoid-uvd-corruptions-on-agp-cards.patch
queue-3.11/drm-radeon-dpm-rs780-don-t-enable-sclk-scaling-if-not-required.patch
queue-3.11/drm-radeon-fix-init-ordering-for-r600.patch
queue-3.11/drm-radeon-add-berlin-pci-ids.patch
queue-3.11/drm-radeon-enable-uvd-interrupts-on-cik.patch
queue-3.11/drm-radeon-fix-lcd-record-parsing.patch
queue-3.11/drm-radeon-fix-panel-scaling-with-edp-and-lvds-bridges.patch
queue-3.11/drm-radeon-fix-resume-on-some-rs4xx-boards-v2.patch
queue-3.11/drm-radeon-cik-update-gpu_init-for-an-additional-berlin-gpu.patch
queue-3.11/drm-radeon-update-line-buffer-allocation-for-dce8.patch
queue-3.11/drm-radeon-r6xx-add-a-stubbed-out-set_uvd_clocks-callback.patch
queue-3.11/drm-radeon-si-add-support-for-cp-dma-to-cs-checker-for-compute-v2.patch
queue-3.11/drm-radeon-atom-workaround-vbios-bug-in-transmitter-table-on-rs880-v2.patch
queue-3.11/drm-radeon-fix-endian-bugs-in-hw-i2c-atom-routines.patch
queue-3.11/drm-radeon-dpm-add-reclocking-quirk-for-asus-k70af.patch
queue-3.11/drm-radeon-update-line-buffer-allocation-for-dce6.patch
queue-3.11/drm-radeon-update-line-buffer-allocation-for-dce4.1-5.patch
queue-3.11/drm-radeon-add-some-additional-berlin-pci-ids.patch
queue-3.11/drm-radeon-dpm-handle-bapm-on-trinity.patch
queue-3.11/drm-radeon-dpm-fix-fallback-for-empty-uvd-clocks.patch
queue-3.11/drm-radeon-dpm-make-sure-dc-performance-level-limits-are-valid-btc-si-v2.patch
queue-3.11/drm-radeon-fix-handling-of-variable-sized-arrays-for-router-objects.patch
queue-3.11/drm-radeon-fill-in-gpu_init-for-berlin-gpu-cores.patch
--
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