On 09/02/2024 21:09, Konrad Dybcio wrote:
To make it easier to understand the various clock requirements within
this driver, add kerneldoc to venus_clk_get() explaining the fluff.
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
---
drivers/media/platform/qcom/venus/pm_helpers.c | 28 ++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
index ac7c83404c6e..ea0a7d4601e2 100644
--- a/drivers/media/platform/qcom/venus/pm_helpers.c
+++ b/drivers/media/platform/qcom/venus/pm_helpers.c
@@ -23,6 +23,34 @@
static bool legacy_binding;
+/**
+ * venus_clks_get() - Get Venus clocks that are not bound to a vcodec
Get non-codec Venus clocks.
+ * @core: A pointer to the venus core resource
+ *
+ * The Venus block (depending on the generation) can be split into a couple
+ * of clock domains: one for "main logic" and one for each video core (0-2pcs).
(0-2pcs) is hard for me to decode => zero to two parts?
Why are we double quoting "main logic" feels a bit "Dr Evil"
Suggest hyphenating which would do the same thing:
'one clock for the core-logic||main-logic'
+ *
+ * MSM8916 (and possibly other HFIv1 users) only feature the "main logic"
+ * domain, so this function is the only kind if clk_get necessary there.
+ *
+ * MSM8996 (and other HFIv3 users) feature two video cores, with core0 being
+ * statically proclaimed a decoder and core1 an encoder, with both having
+ * their own clock domains.
"statically defined" not "statically proclaimed"
+ *
+ * SDM845 features two video cores, each one of which may or may not be
+ * subdivided into 2 enc/dec threads.
"into two encoder/decoder threads."
+ *
+ * Other SoCs either feature a single video core (with its own clock domain)
+ * or 1 video core and 1 CVP (Computer Vision Processor) core. In both cases
+ * we treat it the same (CVP only happens to live near-by Venus on the SoC).
One not 1
+ *
+ * Due to unfortunate developments in the past, we have to support bindings
+ * (MSM8996, SDM660, SDM845) that require specifying the clocks and
+ * power-domains associated with a video core domain in a bogus subnode,
+ * which means that additional fluff is necessary..
"We need to support legacy bindings"
"sub-node"
+ *
+ * Return: 0 on success, negative errno on failure.
+ */
static int venus_clks_get(struct venus_core *core)
{
const struct venus_resources *res = core->res;
With that fixed.
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
