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drm/xe: Set mask bits for CCS_MODE register

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BugLink: https://bugs.launchpad.net/bugs/2100292

commit 7fd3fa006fa56c0ec299c61ecf5c572c723adad5 upstream.

CCS_MODE register requires setting mask bits from Xe2+ platforms. Set
the mask bits unconditionally, as those bits are unused for older
platforms.

Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Cc: stable@vger.kernel.org # v6.11+
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241008073628.377433-2-balasubramani.vivekanandan@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 23ea2c7572d4735ef66beb1e4feb8ae510b78247)
[ Fix conflict with mmio refactors ]
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Balasubramani Vivekanandan
2025-02-26 22:49:14 +09:00
committed by Stefan Bader
parent 116e1efd81
commit 72013b7957
2 changed files with 7 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/xe/regs/xe_gt_regs.h
+1 -1
View File
@@ -394,7 +394,7 @@
* [4-6] RSVD
* [7] Disabled
*/
#define CCS_MODE XE_REG(0x14804)
#define CCS_MODE XE_REG(0x14804, XE_REG_OPTION_MASKED)
#define CCS_MODE_CSLICE_0_3_MASK REG_GENMASK(11, 0) /* 3 bits per cslice */
#define CCS_MODE_CSLICE_MASK 0x7 /* CCS0-3 + rsvd */
#define CCS_MODE_CSLICE_WIDTH ilog2(CCS_MODE_CSLICE_MASK + 1)
drivers/gpu/drm/xe/xe_gt_ccs_mode.c
+6
View File
@@ -66,6 +66,12 @@ static void __xe_gt_apply_ccs_mode(struct xe_gt *gt, u32 num_engines)
}
}
/*
* Mask bits need to be set for the register. Though only Xe2+
* platforms require setting of mask bits, it won't harm for older
* platforms as these bits are unused there.
*/
mode |= CCS_MODE_CSLICE_0_3_MASK << 16;
xe_mmio_write32(gt, CCS_MODE, mode);
xe_gt_dbg(gt, "CCS_MODE=%x config:%08x, num_engines:%d, num_slices:%d\n",