aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/radeon/atombios_i2c.c
Commit message (Collapse)AuthorAgeFilesLines
* gpu: drm: dead code eliminationPan Zhang2019-12-181-5/+0
| | | | | | | | | | | | this set adds support for removal of gpu drm dead code. patch3 is similar with patch 1: `num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255, so there is a impossible condition '(num > 255) => (0-255 > 255)'. Signed-off-by: Pan Zhang <zhangpan26@huawei.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/radeon: drop use of drmP.h (2/2)Sam Ravnborg2019-06-101-1/+1
| | | | | | | | | | | | | Drop use of drmP.h in remaining .c files. To ease review a little the drmP.h removal was divided in two commits. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Cc: "Christian König" <christian.koenig@amd.com> Cc: "David (ChunMing) Zhou" <David1.Zhou@amd.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190608080241.4958-8-sam@ravnborg.org
* drm/radeon: change function signature to pass full rangeMathieu Malaterre2018-09-191-1/+1
| | | | | | | | | | | | | | | | | | | In function ‘radeon_process_i2c_ch’ a comparison of a u8 value against 255 is done. Since it is always false, change the signature of this function to use an `int` instead, which match the type used in caller: `radeon_atom_hw_i2c_xfer`. Fix the following warning triggered with W=1: CC [M] drivers/gpu/drm/radeon/atombios_i2c.o drivers/gpu/drm/radeon/atombios_i2c.c: In function ‘radeon_process_i2c_ch’: drivers/gpu/drm/radeon/atombios_i2c.c:71:11: warning: comparison is always false due to limited range of data type [-Wtype-limits] if (num > ATOM_MAX_HW_I2C_READ) { ^ Reviewed-by: Huang Rui <ray.huang@amd.com> Signed-off-by: Mathieu Malaterre <malat@debian.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/radeon: add locking around atombios scratch space usageDave Airlie2014-11-111-1/+3
| | | | | | | | | | | | | While developing MST support I noticed I often got the wrong data back from a transaction, in a racy fashion. I noticed the scratch space wasn't locked against concurrent users. Based on a patch by Alex, but I've made it a bit more obvious when things are locked. Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
* drm/radeon: add a i2c bus mutexAlex Deucher2014-06-021-4/+13
| | | | | | | | The i2c and aux buses use the same pads so add a mutex to protect access to the pads. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Christian König <christian.koenig@amd.com>
* drivers: gpu: Move prototype declaration to header file radeon_mode.h from ↵Rashika Kheria2014-01-071-2/+0
| | | | | | | | | | | | | | atombios_i2c.c Move prototype declaration of function radeon_atom_copy_swap() to header file drm/radeon/radeon_mode.h because it is used by more than one file. This eliminates the following warnings in drm/radeon/atombios_dp.c: drivers/gpu/drm/radeon/atombios_dp.c:53:6: warning: no previous prototype for ‘radeon_atom_copy_swap’ [-Wmissing-prototypes] Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/radeon/atom: fix bus probes when hw_i2c is set (v2)Alex Deucher2013-12-041-6/+9
| | | | | | | | | | | | | When probing the bus, we need to set the byte count to 0 rather than 1. v2: Don't count the first byte. bug: https://bugzilla.kernel.org/show_bug.cgi?id=66241 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
* radeon/i2c: do not count reg index in number of i2c byte we are writing.Jerome Glisse2013-11-151-2/+4
| | | | | | | | | | Useless to count the register index in number of bytes we are writing. Fixes a regression with hw i2c enabled. Signed-off-by: Jerome Glisse <jglisse@redhat.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
* drm/radeon: atombios hw i2c fixesAlex Deucher2013-08-301-4/+8
| | | | | | | | These fixes make writes work properly. Previously only reads worked. Note that this feature is off by default. Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/radeon: fix endian bugs in hw i2c atom routinesAlex Deucher2013-08-301-1/+3
| | | | | | | | | Need to swap the data fetched over i2c properly. This is the same fix as the endian fix for aux channel transactions. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
* UAPI: (Scripted) Convert #include "..." to #include <path/...> in drivers/gpu/David Howells2012-10-021-2/+2
| | | | | | | | | | | Convert #include "..." to #include <path/...> in drivers/gpu/. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Dave Airlie <airlied@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
* drm/radeon/kms/dce3+: add support for hw i2c using atomAlex Deucher2012-02-031-0/+139
Starting with DCE3 hardware, atom contains a general purpose ProcessI2cChannelTransaction similar to ProcessAuxChannelTransaction. Add an implementation using the atom tables for DCE3+ hardware. This should be a little less CPU intensive than bit banging and may work better in certain cases. Enable it by setting the radeon hw_i2c module parameter to 1. E.g., radeon.hw_i2c=1 on the kernel command line in grub. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
generated by cgit (git 2.34.1) at 2025-03-04 08:15:13 +0000