Re: [PATCH v2 07/11] drm/mediatek: Add secure layer config support for ovl
From: Jason-JH Lin (林睿祥)
Date: Wed Oct 25 2023 - 04:03:17 EST
Hi CK,
Thanks for the reviews.
On Wed, 2023-10-25 at 03:08 +0000, CK Hu (胡俊光) wrote:
> Hi, Jason:
>
> On Mon, 2023-10-23 at 12:45 +0800, Jason-JH.Lin wrote:
> > Add secure layer config support for ovl.
> >
> > Signed-off-by: Jason-JH.Lin <jason-jh.lin@xxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 ++
> > drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 31
> > +++++++++++++++++--
> > .../gpu/drm/mediatek/mtk_disp_ovl_adaptor.c | 12 +++++++
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 2 ++
> > 4 files changed, 46 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 2254038519e1..dec937b183a8 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -9,6 +9,7 @@
> > #include <linux/soc/mediatek/mtk-cmdq.h>
> > #include <linux/soc/mediatek/mtk-mmsys.h>
> > #include <linux/soc/mediatek/mtk-mutex.h>
> > +#include "mtk_drm_ddp_comp.h"
> > #include "mtk_drm_plane.h"
> > #include "mtk_mdp_rdma.h"
> >
> > @@ -79,6 +80,7 @@ void mtk_ovl_clk_disable(struct device *dev);
> > void mtk_ovl_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> > +u64 mtk_ovl_get_sec_port(struct mtk_ddp_comp *comp, unsigned int
> > idx);
> > int mtk_ovl_layer_check(struct device *dev, unsigned int idx,
> > struct mtk_plane_state *mtk_state);
> > void mtk_ovl_layer_config(struct device *dev, unsigned int idx,
> > @@ -112,6 +114,7 @@ void mtk_ovl_adaptor_clk_disable(struct device
> > *dev);
> > void mtk_ovl_adaptor_config(struct device *dev, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt
> > *cmdq_pkt);
> > +u64 mtk_ovl_adaptor_get_sec_port(struct mtk_ddp_comp *comp,
> > unsigned
> > int idx);
> > void mtk_ovl_adaptor_layer_config(struct device *dev, unsigned int
> > idx,
> > struct mtk_plane_state *state,
> > struct cmdq_pkt *cmdq_pkt);
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > index 2bffe4245466..76e832e4875a 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> > @@ -46,6 +46,7 @@
> > #define DISP_REG_OVL_ADDR(ovl, n) ((ovl)->data->addr +
> > 0x20 * (n))
> > #define DISP_REG_OVL_HDR_ADDR(ovl, n) ((ovl)->data-
> > > addr + 0x20 * (n) + 0x04)
> >
> > #define DISP_REG_OVL_HDR_PITCH(ovl, n) ((ovl)->data-
> > > addr + 0x20 * (n) + 0x08)
> >
> > +#define DISP_REG_OVL_SECURE 0x0fc0
> >
> > #define GMC_THRESHOLD_BITS 16
> > #define GMC_THRESHOLD_HIGH ((1 << GMC_THRESHOLD_BITS) / 4)
> > @@ -126,8 +127,19 @@ struct mtk_disp_ovl {
> > const struct mtk_disp_ovl_data *data;
> > void (*vblank_cb)(void *data);
> > void *vblank_cb_data;
> > + resource_size_t regs_pa;
> > };
> >
> > +u64 mtk_ovl_get_sec_port(struct mtk_ddp_comp *comp, unsigned int
> > idx)
> > +{
> > + if (comp->id == DDP_COMPONENT_OVL0)
> > + return 1ULL << CMDQ_SEC_DISP_OVL0;
> > + else if (comp->id == DDP_COMPONENT_OVL1)
> > + return 1ULL << CMDQ_SEC_DISP_OVL1;
> > +
> > + return 0;
> > +}
> > +
> > static irqreturn_t mtk_disp_ovl_irq_handler(int irq, void *dev_id)
> > {
> > struct mtk_disp_ovl *priv = dev_id;
> > @@ -449,8 +461,22 @@ void mtk_ovl_layer_config(struct device *dev,
> > unsigned int idx,
> > DISP_REG_OVL_SRC_SIZE(idx));
> > mtk_ddp_write_relaxed(cmdq_pkt, offset, &ovl->cmdq_reg, ovl-
> > > regs,
> >
> > DISP_REG_OVL_OFFSET(idx));
> > - mtk_ddp_write_relaxed(cmdq_pkt, addr, &ovl->cmdq_reg, ovl-
> > > regs,
> >
> > - DISP_REG_OVL_ADDR(ovl, idx));
> > +
> > + if (state->pending.is_sec) {
> > + const struct drm_format_info *fmt_info =
> > drm_format_info(fmt);
> > + unsigned int buf_size = (pending->height - 1) *
> > pending->pitch +
> > + pending->width * fmt_info-
> > > cpp[0];
> >
> > +
> > + mtk_ddp_write_mask(cmdq_pkt, BIT(idx), &ovl->cmdq_reg,
> > ovl->regs,
> > + DISP_REG_OVL_SECURE, BIT(idx));
> > + mtk_ddp_sec_write(cmdq_pkt, ovl->regs_pa +
> > DISP_REG_OVL_ADDR(ovl, idx),
> > + pending->addr, CMDQ_IWC_H_2_MVA, 0,
> > buf_size, 0);
> > + } else {
> > + mtk_ddp_write_mask(cmdq_pkt, 0, &ovl->cmdq_reg, ovl-
> > > regs,
> >
> > + DISP_REG_OVL_SECURE, BIT(idx));
>
> What's the function of this register? Does it means that layer is
> ABLE
> to read secure buffer? And this register could be controlled in
> normal
> world?
>
Hum... Yes, but it also need some configuration in TEE world, then it
can read secure buffer normally.
I'll remove this and move it to the TEE side.
Regards,
Jason-JH.Lin
> Regards,
> CK
>
> > + mtk_ddp_write_relaxed(cmdq_pkt, addr, &ovl->cmdq_reg,
> > ovl->regs,
> > + DISP_REG_OVL_ADDR(ovl, idx));
> > + }
> >
> > if (is_afbc) {
> > mtk_ddp_write_relaxed(cmdq_pkt, hdr_addr, &ovl-
> > > cmdq_reg, ovl->regs,
> >
> > @@ -529,6 +555,7 @@ static int mtk_disp_ovl_probe(struct
> > platform_device *pdev)
> > }
> >
> > res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + priv->regs_pa = res->start;
> > priv->regs = devm_ioremap_resource(dev, res);
> > if (IS_ERR(priv->regs)) {
> > dev_err(dev, "failed to ioremap ovl\n");
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> > b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> > index 6bf6367853fb..28a0bccfb0b9 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
> > @@ -83,6 +83,18 @@ static const struct ovl_adaptor_comp_match
> > comp_matches[OVL_ADAPTOR_ID_MAX] = {
> > [OVL_ADAPTOR_ETHDR0] = { OVL_ADAPTOR_TYPE_ETHDR, 0 },
> > };
> >
> > +static const u64 ovl_adaptor_sec_port[] = {
> > + 1ULL << CMDQ_SEC_VDO1_DISP_RDMA_L0,
> > + 1ULL << CMDQ_SEC_VDO1_DISP_RDMA_L1,
> > + 1ULL << CMDQ_SEC_VDO1_DISP_RDMA_L2,
> > + 1ULL << CMDQ_SEC_VDO1_DISP_RDMA_L3,
> > +};
> > +
> > +u64 mtk_ovl_adaptor_get_sec_port(struct mtk_ddp_comp *comp,
> > unsigned
> > int idx)
> > +{
> > + return ovl_adaptor_sec_port[idx];
> > +}
> > +
> > void mtk_ovl_adaptor_layer_config(struct device *dev, unsigned int
> > idx,
> > struct mtk_plane_state *state,
> > struct cmdq_pkt *cmdq_pkt)
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index 3dca936b9143..eec3a1cc2ed4 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -373,6 +373,7 @@ static const struct mtk_ddp_comp_funcs ddp_ovl
> > =
> > {
> > .bgclr_in_off = mtk_ovl_bgclr_in_off,
> > .get_formats = mtk_ovl_get_formats,
> > .get_num_formats = mtk_ovl_get_num_formats,
> > + .get_sec_port = mtk_ovl_get_sec_port,
> > };
> >
> > static const struct mtk_ddp_comp_funcs ddp_postmask = {
> > @@ -424,6 +425,7 @@ static const struct mtk_ddp_comp_funcs
> > ddp_ovl_adaptor = {
> > .remove = mtk_ovl_adaptor_remove_comp,
> > .get_formats = mtk_ovl_adaptor_get_formats,
> > .get_num_formats = mtk_ovl_adaptor_get_num_formats,
> > + .get_sec_port = mtk_ovl_adaptor_get_sec_port,
> > };
> >
> > static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX]
> > =
> > {