Hi Laurent,
Thanks for the feedback.
> Subject: Re: [RFC 11/28] drm: rcar-du: Add num_rpf to struct
> rcar_du_device_info
>
> Hi Biju,
>
> Thank you for the patch.
>
> On Wed, Jan 12, 2022 at 05:45:55PM +0000, Biju Das wrote:
> > Number of RPF's VSP is different on R-Car and RZ/G2L R-Car Gen3 -> 5
> > RPF's R-Car Gen2 -> 4 RPF's RZ/G2L -> 2 RPF's
> >
> > Add num_rpf to struct rcar_du_device_info to support later SoC without
> > any code changes.
> >
> > Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/rcar-du/rcar_du_drv.c | 17 +++++++++++++++++
> > drivers/gpu/drm/rcar-du/rcar_du_drv.h | 2 ++
> > drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 6 +-----
> > 3 files changed, 20 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > index 5a8131ef81d5..5ca7cd085794 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
> > @@ -56,6 +56,7 @@ static const struct rcar_du_device_info
> rzg1_du_r8a7743_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 4,
> > };
> >
> > static const struct rcar_du_device_info rzg1_du_r8a7745_info = { @@
> > -78,6 +79,7 @@ static const struct rcar_du_device_info
> rzg1_du_r8a7745_info = {
> > .port = 1,
> > },
> > },
> > + .num_rpf = 4,
> > };
> >
> > static const struct rcar_du_device_info rzg1_du_r8a77470_info = { @@
> > -105,6 +107,7 @@ static const struct rcar_du_device_info
> rzg1_du_r8a77470_info = {
> > .port = 2,
> > },
> > },
> > + .num_rpf = 4,
> > };
> >
> > static const struct rcar_du_device_info rcar_du_r8a774a1_info = { @@
> > -134,6 +137,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a774a1_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 5,
> > .dpll_mask = BIT(1),
> > };
> >
> > @@ -164,6 +168,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a774b1_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 5,
> > .dpll_mask = BIT(1),
> > };
> >
> > @@ -191,6 +196,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a774c0_info = {
> > },
> > },
> > .num_lvds = 2,
> > + .num_rpf = 4,
> > .lvds_clk_mask = BIT(1) | BIT(0),
> > };
> >
> > @@ -221,6 +227,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a774e1_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 5,
> > .dpll_mask = BIT(1),
> > };
> >
> > @@ -273,6 +280,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a7790_info = {
> > },
> > },
> > .num_lvds = 2,
> > + .num_rpf = 4,
> > };
> >
> > /* M2-W (r8a7791) and M2-N (r8a7793) are identical */ @@ -298,6
> > +306,7 @@ static const struct rcar_du_device_info rcar_du_r8a7791_info =
> {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 4,
> > };
> >
> > static const struct rcar_du_device_info rcar_du_r8a7792_info = { @@
> > -318,6 +327,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a7792_info = {
> > .port = 1,
> > },
> > },
> > + .num_rpf = 4,
> > };
> >
> > static const struct rcar_du_device_info rcar_du_r8a7794_info = { @@
> > -341,6 +351,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a7794_info = {
> > .port = 1,
> > },
> > },
> > + .num_rpf = 4,
> > };
> >
> > static const struct rcar_du_device_info rcar_du_r8a7795_info = { @@
> > -374,6 +385,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a7795_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 5,
> > .dpll_mask = BIT(2) | BIT(1),
> > };
> >
> > @@ -404,6 +416,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a7796_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 5,
> > .dpll_mask = BIT(1),
> > };
> >
> > @@ -434,6 +447,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a77965_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 5,
> > .dpll_mask = BIT(1),
> > };
> >
> > @@ -460,6 +474,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a77970_info = {
> > },
> > },
> > .num_lvds = 1,
> > + .num_rpf = 5,
> > };
> >
> > static const struct rcar_du_device_info rcar_du_r8a7799x_info = { @@
> > -487,6 +502,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a7799x_info = {
> > },
> > },
> > .num_lvds = 2,
> > + .num_rpf = 5,
> > .lvds_clk_mask = BIT(1) | BIT(0),
> > };
> >
> > @@ -506,6 +522,7 @@ static const struct rcar_du_device_info
> rcar_du_r8a779a0_info = {
> > .port = 1,
> > },
> > },
> > + .num_rpf = 5,
> > .dsi_clk_mask = BIT(1) | BIT(0),
> > };
> >
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> > b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> > index 101f42df86ea..9792a77590be 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
> > @@ -69,6 +69,7 @@ struct rcar_du_output_routing {
> > * @channels_mask: bit mask of available DU channels
> > * @routes: array of CRTC to output routes, indexed by output
> (RCAR_DU_OUTPUT_*)
> > * @num_lvds: number of internal LVDS encoders
> > + * @num_rpf: max number of rpf's in vsp
>
> s/rpf's/RPFs/ and s/vsp/VSP/
>
> While the patch itself looks fine to me, the RZ/G2L has a display
> controller that is completely unrelated to the DU, despite sharing the
> same name. I'd rather have a rzg2l_du driver. It may be possibly to share
> some code with the rcar_du driver (I'm thinking about the VSP handling for
> instance), but in the end I'm not sure if even that would be worth it.
OK, I have created separate RZ/G2L display driver with minimal code changes and
Maximum code reuse. Please provide feedback on new patch serries[1]
[1] https://lore.kernel.org/linux-renesas-soc/20220312215417.8023-1-biju.das.jz@xxxxxxxxxxxxxx/T/#t
Regards,
Biju
>
> > * @dpll_mask: bit mask of DU channels equipped with a DPLL
> > * @dsi_clk_mask: bitmask of channels that can use the DSI clock as dot
> clock
> > * @lvds_clk_mask: bitmask of channels that can use the LVDS clock as
> > dot clock @@ -80,6 +81,7 @@ struct rcar_du_device_info {
> > unsigned int channels_mask;
> > struct rcar_du_output_routing routes[RCAR_DU_OUTPUT_MAX];
> > unsigned int num_lvds;
> > + unsigned int num_rpf;
> > unsigned int dpll_mask;
> > unsigned int dsi_clk_mask;
> > unsigned int lvds_clk_mask;
> > diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> > b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> > index b7fc5b069cbc..cf045a203aa5 100644
> > --- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> > +++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> > @@ -415,11 +415,7 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp,
> struct device_node *np,
> > if (ret < 0)
> > return ret;
> >
> > - /*
> > - * The VSP2D (Gen3) has 5 RPFs, but the VSP1D (Gen2) is limited to
> > - * 4 RPFs.
> > - */
> > - num_planes = rcdu->info->gen >= 3 ? 5 : 4;
> > + num_planes = rcdu->info->num_rpf;
> >
> > vsp->planes = kcalloc(num_planes, sizeof(*vsp->planes), GFP_KERNEL);
> > if (!vsp->planes)
>
> --
> Regards,
>
> Laurent Pinchart
