Re: [PATCH 3/5] drm/msm: mdss: Add QCS8300 support

[Yongxing Mou <quic_yongmou@xxxxxxxxxxx>]

On 2024/11/27 21:46, Dmitry Baryshkov wrote:
> On Wed, Nov 27, 2024 at 03:05:03PM +0800, Yongxing Mou wrote:
> > Add Mobile Display Subsystem (MDSS) support for the QCS8300 platform.
>
> Please mention, why do you need it at all. I see that the UBWC swizzle
> and HBB settings are different. Is this really the case? Is it because
> of the different memory being used on those platforms?
Thanks, will modify the comment to add more information .QCS8300 UBWC 
setting is quite different with SA8775P,it use different memory,so their 
recommended configurations are not quite the same.this is really setting.
> > Signed-off-by: Yongxing Mou <quic_yongmou@xxxxxxxxxxx>
> > ---
> >   drivers/gpu/drm/msm/msm_mdss.c | 11 +++++++++++
> >   1 file changed, 11 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c
> > index b7bd899ead44bf86998e7295bccb31a334fa6811..90d8fe469d3134ec73f386153509ac257d75930a 100644
> > --- a/drivers/gpu/drm/msm/msm_mdss.c
> > +++ b/drivers/gpu/drm/msm/msm_mdss.c
> > @@ -568,6 +568,16 @@ static const struct msm_mdss_data qcm2290_data = {
> >   	.reg_bus_bw = 76800,
> >   };
> >   
> > +static const struct msm_mdss_data qcs8300_data = {
> > +	.ubwc_enc_version = UBWC_4_0,
> > +	.ubwc_dec_version = UBWC_4_0,
> > +	.ubwc_swizzle = 6,
> > +	.ubwc_static = 1,
> > +	.highest_bank_bit = 3,
> > +	.macrotile_mode = 1,
> > +	.reg_bus_bw = 74000,
> > +};
> > +
> >   static const struct msm_mdss_data sa8775p_data = {
> >   	.ubwc_enc_version = UBWC_4_0,
> >   	.ubwc_dec_version = UBWC_4_0,
> > @@ -715,6 +725,7 @@ static const struct of_device_id mdss_dt_match[] = {
> >   	{ .compatible = "qcom,mdss" },
> >   	{ .compatible = "qcom,msm8998-mdss", .data = &msm8998_data },
> >   	{ .compatible = "qcom,qcm2290-mdss", .data = &qcm2290_data },
> > +	{ .compatible = "qcom,qcs8300-mdss", .data = &qcs8300_data },
> >   	{ .compatible = "qcom,sa8775p-mdss", .data = &sa8775p_data },
> >   	{ .compatible = "qcom,sdm670-mdss", .data = &sdm670_data },
> >   	{ .compatible = "qcom,sdm845-mdss", .data = &sdm845_data },
> >
> > --
> > 2.34.1