On Montag, 8. Mai 2023 13:35:07 CEST Konrad Dybcio wrote:
> On 8.05.2023 13:32, Dmitry Baryshkov wrote:
> > On 08/05/2023 10:23, Konrad Dybcio wrote:
> >> On 6.05.2023 23:20, Luca Weiss wrote:
> >>> On msm8226 we also have OXILICX_GDSC but we need a slighly different
> >>> config, with a .cxcs defined for clock but with no parent.
> >>
> >> Hm, on newer (a5xx+) GPUs, CX needs to be turned on first and
> >> to achieve that, we sometimes define it to be the GX's (also
> >> implicitly known as "oxili-non-CX" in before-a6xx-times) parent..
> >>
> >> Roughly speaking CX powers the "GPU hardware owned by the broader
> >> SoC that may not need the GPU core clock to be up" and GX powers
> >> the "GPU hardware owned strictly by the GPU that needs at least some
> >> GPU clocks to be enabled"
> >>
> >> Maybe 8974 simply has a bug in the driver that would do the reverse?
> >> Could you (and perhaps Dmitry on his shiny new 13yo board) test that
> >> theory, preferably on both SoCs?
> >>
> >> --- a/drivers/clk/qcom/mmcc-msm8974.c
> >> +++ b/drivers/clk/qcom/mmcc-msm8974.c
> >> @@ -2431,6 +2431,7 @@ static struct gdsc oxili_gdsc = {
> >> .pd = {
> >> .name = "oxili",
> >> },
> >> + .parent = &oxili_gdsc.pd,
> >> .pwrsts = PWRSTS_OFF_ON,
> >> };
> >
> > Are you declaring oxili_gdsc to be a parent of itself?
>
> lol.. nice catch of course this line should have been
>
> + .parent = &oxilicx_gdsc.pd,
>
> and the definitions would need to be swapped
The 0x4024 oxili_gdsc (downstream name gdsc_oxili_gx) is disabled in 8226 dts.
Only in downstream msm8974.dtsi this gdsc gets "parent-supply =
<&pm8841_s4_corner>;", on 8226 there's no parent-supply. And the gdsc parent
doesn't even seem to be described there.
Should I still try?
>
> Konrad
>
> >> @@ -2439,7 +2440,6 @@ static struct gdsc oxilicx_gdsc = {
> >> .pd = {
> >> .name = "oxilicx",
> >> },
> >> - .parent = &oxili_gdsc.pd,
> >> .pwrsts = PWRSTS_OFF_ON,
> >> };
> >>
> >> Konrad
> >>
> >>> Signed-off-by: Luca Weiss <luca@xxxxxxxxx>
> >>> ---
> >>> drivers/clk/qcom/mmcc-msm8974.c | 11 +++++++++++
> >>> 1 file changed, 11 insertions(+)
> >>>
> >>> diff --git a/drivers/clk/qcom/mmcc-msm8974.c
> >>> b/drivers/clk/qcom/mmcc-msm8974.c index 4273fce9a4a4..39ee3953567c
> >>> 100644
> >>> --- a/drivers/clk/qcom/mmcc-msm8974.c
> >>> +++ b/drivers/clk/qcom/mmcc-msm8974.c
> >>> @@ -2443,6 +2443,16 @@ static struct gdsc oxilicx_gdsc = {
> >>> .pwrsts = PWRSTS_OFF_ON,
> >>> };
> >>> +static struct gdsc oxilicx_gdsc_msm8226 = {
> >>> + .gdscr = 0x4034,
> >>> + .cxcs = (unsigned int []){ 0x4028 },
> >>> + .cxc_count = 1,
> >>> + .pd = {
> >>> + .name = "oxilicx",
> >>> + },
> >>> + .pwrsts = PWRSTS_OFF_ON,
> >>> +};
> >>> +
> >>> static struct clk_regmap *mmcc_msm8226_clocks[] = {
> >>> [MMSS_AHB_CLK_SRC] = &mmss_ahb_clk_src.clkr,
> >>> [MMSS_AXI_CLK_SRC] = &mmss_axi_clk_src.clkr,
> >>> @@ -2533,6 +2543,7 @@ static struct gdsc *mmcc_msm8226_gdscs[] = {
> >>> [MDSS_GDSC] = &mdss_gdsc,
> >>> [CAMSS_JPEG_GDSC] = &camss_jpeg_gdsc,
> >>> [CAMSS_VFE_GDSC] = &camss_vfe_gdsc,
> >>> + [OXILICX_GDSC] = &oxilicx_gdsc_msm8226,
> >>> };
> >>> static const struct regmap_config mmcc_msm8226_regmap_config = {
> >>>
> >>> ---
> >>> base-commit: dd9e11d6477a52ede9ebe575c83285e79e823889
> >>> change-id: 20230506-msm8226-oxilicx-7f3f0f8e491d
> >>>
> >>> Best regards,
