From e57bda247f29c4b36619b3f1067ee0320a9021ec Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 3 Feb 2026 16:17:52 -0500 Subject: drm/msm/a6xx: fix bogus hwcg register updates [ Upstream commit dedb897f11c5d7e32c0e0a0eff7cec23a8047167 ] The hw clock gating register sequence consists of register value pairs that are written to the GPU during initialisation. The a690 hwcg sequence has two GMU registers in it that used to amount to random writes in the GPU mapping, but since commit 188db3d7fe66 ("drm/msm/a6xx: Rebase GMU register offsets") they trigger a fault as the updated offsets now lie outside the mapping. This in turn breaks boot of machines like the Lenovo ThinkPad X13s. Note that the updates of these GMU registers is already taken care of properly since commit 40c297eb245b ("drm/msm/a6xx: Set GMU CGC properties on a6xx too"), but for some reason these two entries were left in the table. Fixes: 5e7665b5e484 ("drm/msm/adreno: Add Adreno A690 support") Cc: stable@vger.kernel.org # 6.5 Cc: Bjorn Andersson Cc: Konrad Dybcio Signed-off-by: Johan Hovold Reviewed-by: Konrad Dybcio Reviewed-by: Akhil P Oommen Fixes: 188db3d7fe66 ("drm/msm/a6xx: Rebase GMU register offsets") Patchwork: https://patchwork.freedesktop.org/patch/695778/ Message-ID: <20251221164552.19990-1-johan@kernel.org> Signed-off-by: Rob Clark (cherry picked from commit dcbd2f8280eea2c965453ed8c3c69d6f121e950b) [ Applied fix to a6xx_gpu.c instead of a6xx_catalog.c ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index 4654c0f362c7..6666d8f6c17a 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -690,8 +690,6 @@ const struct adreno_reglist a690_hwcg[] = { {REG_A6XX_RBBM_CLOCK_DELAY_GMU_GX, 0x00000111}, {REG_A6XX_RBBM_CLOCK_HYST_GMU_GX, 0x00000555}, {REG_A6XX_GPU_GMU_AO_GMU_CGC_MODE_CNTL, 0x20200}, - {REG_A6XX_GPU_GMU_AO_GMU_CGC_DELAY_CNTL, 0x10111}, - {REG_A6XX_GPU_GMU_AO_GMU_CGC_HYST_CNTL, 0x5555}, {} }; -- cgit v1.2.3