diff options
| author | Konrad Dybcio <konrad.dybcio@linaro.org> | 2023-05-30 14:30:39 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-08-10 07:58:34 +0200 |
| commit | 375b48f40fd03069658bb43bcd19a813f6dd8be5 (patch) | |
| tree | 27c4a1d99ea31fe5bd40c20c025fe79d3cf3df40 /drivers/media/platform/qcom/venus/firmware.c | |
| parent | 9ac60db2bb4b9fb590abd05e6795d34df88e850c (diff) | |
media: venus: firmware: Leave a clue about obtaining CP VARs
The qcom_scm_mem_protect_video_var accepts two sets of <addr size>
pairs as arguments. They describe the virtual address ranges of the
CP (Content Protection) and CP_NONPIXEL regions. It is however not
immediately obvious how to obtain these values.
Leave a comment explaining how one can translate the vendor device
tree properties for use with the mainline driver.
Reviewed-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Reviewed-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Diffstat (limited to 'drivers/media/platform/qcom/venus/firmware.c')
| -rw-r--r-- | drivers/media/platform/qcom/venus/firmware.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c index cfb11c551167..572b649c56f3 100644 --- a/drivers/media/platform/qcom/venus/firmware.c +++ b/drivers/media/platform/qcom/venus/firmware.c @@ -241,6 +241,16 @@ int venus_boot(struct venus_core *core) return ret; if (core->use_tz && res->cp_size) { + /* + * Clues for porting using downstream data: + * cp_start = 0 + * cp_size = venus_ns/virtual-addr-pool[0] - yes, address and not size! + * This works, as the non-secure context bank is placed + * contiguously right after the Content Protection region. + * + * cp_nonpixel_start = venus_sec_non_pixel/virtual-addr-pool[0] + * cp_nonpixel_size = venus_sec_non_pixel/virtual-addr-pool[1] + */ ret = qcom_scm_mem_protect_video_var(res->cp_start, res->cp_size, res->cp_nonpixel_start, |