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drm/msm/a6xx: Resolve the meaning of UBWC_MODE 

This bit is set iff the UBWC version is 1.0. That notably does not
include QCM2290's "no UBWC".

This commit is intentionally cross-subsystem to ease review, as the
patchset is intended to be merged together, with a maintainer
consensus.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/660971/
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
pull/1309/head
Konrad Dybcio 2025-06-26 11:02:34 +02:00 committed by Rob Clark
parent 32ef24e51f
commit 87cfc79dcd
2 changed files with 11 additions and 1 deletions
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2
drivers/gpu/drm/msm/adreno/a6xx_gpu.c
View File

@ -687,11 +687,11 @@ static void a6xx_set_ubwc_config(struct msm_gpu *gpu)
*/
BUG_ON(adreno_gpu->ubwc_config.highest_bank_bit < 13);
u32 hbb = adreno_gpu->ubwc_config.highest_bank_bit - 13;
bool ubwc_mode = qcom_ubwc_get_ubwc_mode(cfg);
bool amsbc = cfg->ubwc_enc_version >= UBWC_3_0;
u8 uavflagprd_inv = 0;
u32 hbb_hi = hbb >> 2;
u32 hbb_lo = hbb & 3;
u32 ubwc_mode = adreno_gpu->ubwc_config.ubwc_swizzle & 1;
u32 level2_swizzling_dis = !(adreno_gpu->ubwc_config.ubwc_swizzle & 2);
if (adreno_is_a650_family(adreno_gpu) || adreno_is_a7xx(adreno_gpu))

10
include/linux/soc/qcom/ubwc.h
View File

@ -62,4 +62,14 @@ static inline const struct qcom_ubwc_cfg_data *qcom_ubwc_config_get_data(void)
}
#endif
static inline bool qcom_ubwc_get_ubwc_mode(const struct qcom_ubwc_cfg_data *cfg)
{
bool ret = cfg->ubwc_enc_version == UBWC_1_0;
if (ret && !(cfg->ubwc_swizzle & BIT(0)))
pr_err("UBWC config discrepancy - level 1 swizzling disabled on UBWC 1.0\n");
return ret;
}
#endif /* __QCOM_UBWC_H__ */