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Message-ID: <20191203064559.GA17018@jamwan02-TSP300>
Date: Tue, 3 Dec 2019 06:46:06 +0000
From: "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To: Mihail Atanassov <Mihail.Atanassov@....com>
CC: nd <nd@....com>, Liviu Dudau <Liviu.Dudau@....com>,
"airlied@...ux.ie" <airlied@...ux.ie>,
Brian Starkey <Brian.Starkey@....com>,
"maarten.lankhorst@...ux.intel.com"
<maarten.lankhorst@...ux.intel.com>,
"Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
"Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
"Thomas Sun (Arm Technology China)" <thomas.Sun@....com>,
"Lowry Li (Arm Technology China)" <Lowry.Li@....com>,
"Tiannan Zhu (Arm Technology China)" <Tiannan.Zhu@....com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
Ben Davis <Ben.Davis@....com>,
"Oscar Zhang (Arm Technology China)" <Oscar.Zhang@....com>,
"Channing Chen (Arm Technology China)" <Channing.Chen@....com>
Subject: Re: [PATCH v2 2/2] drm/komeda: Enable new product D32 support
On Mon, Dec 02, 2019 at 11:07:52AM +0000, Mihail Atanassov wrote:
> On Thursday, 21 November 2019 08:17:45 GMT james qian wang (Arm Technology China) wrote:
> > D32 is simple version of D71, the difference is:
> > - Only has one pipeline
> > - Drop the periph block and merge it to GCU
> >
> > v2: Rebase.
> >
> > Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>
> > ---
> > .../drm/arm/display/include/malidp_product.h | 3 +-
> > .../arm/display/komeda/d71/d71_component.c | 2 +-
> > .../gpu/drm/arm/display/komeda/d71/d71_dev.c | 43 ++++++++++++-------
> > .../gpu/drm/arm/display/komeda/d71/d71_regs.h | 13 ++++++
> > .../gpu/drm/arm/display/komeda/komeda_drv.c | 1 +
> > 5 files changed, 44 insertions(+), 18 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/arm/display/include/malidp_product.h b/drivers/gpu/drm/arm/display/include/malidp_product.h
> > index 96e2e4016250..dbd3d4765065 100644
> > --- a/drivers/gpu/drm/arm/display/include/malidp_product.h
> > +++ b/drivers/gpu/drm/arm/display/include/malidp_product.h
> > @@ -18,7 +18,8 @@
> > #define MALIDP_CORE_ID_STATUS(__core_id) (((__u32)(__core_id)) & 0xFF)
> >
> > /* Mali-display product IDs */
> > -#define MALIDP_D71_PRODUCT_ID 0x0071
> > +#define MALIDP_D71_PRODUCT_ID 0x0071
> > +#define MALIDP_D32_PRODUCT_ID 0x0032
> >
> > union komeda_config_id {
> > struct {
> > diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> > index 6dadf4413ef3..c7f7e9c545c7 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> > @@ -1274,7 +1274,7 @@ static int d71_timing_ctrlr_init(struct d71_dev *d71,
> >
> > ctrlr = to_ctrlr(c);
> >
> > - ctrlr->supports_dual_link = true;
> > + ctrlr->supports_dual_link = d71->supports_dual_link;
> >
> > return 0;
> > }
> > diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
> > index 9b3bf353b6cc..2d429e310e5b 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
> > @@ -371,23 +371,33 @@ static int d71_enum_resources(struct komeda_dev *mdev)
> > goto err_cleanup;
> > }
> >
> > - /* probe PERIPH */
> > + /* Only the legacy HW has the periph block, the newer merges the periph
> > + * into GCU
> > + */
> > value = malidp_read32(d71->periph_addr, BLK_BLOCK_INFO);
> > - if (BLOCK_INFO_BLK_TYPE(value) != D71_BLK_TYPE_PERIPH) {
> > - DRM_ERROR("access blk periph but got blk: %d.\n",
> > - BLOCK_INFO_BLK_TYPE(value));
> > - err = -EINVAL;
> > - goto err_cleanup;
> > + if (BLOCK_INFO_BLK_TYPE(value) != D71_BLK_TYPE_PERIPH)
> > + d71->periph_addr = NULL;
> > +
> > + if (d71->periph_addr) {
> > + /* probe PERIPHERAL in legacy HW */
> > + value = malidp_read32(d71->periph_addr, PERIPH_CONFIGURATION_ID);
> > +
> > + d71->max_line_size = value & PERIPH_MAX_LINE_SIZE ? 4096 : 2048;
> > + d71->max_vsize = 4096;
> > + d71->num_rich_layers = value & PERIPH_NUM_RICH_LAYERS ? 2 : 1;
> > + d71->supports_dual_link = !!(value & PERIPH_SPLIT_EN);
> > + d71->integrates_tbu = !!(value & PERIPH_TBU_EN);
> > + } else {
> > + value = malidp_read32(d71->gcu_addr, GCU_CONFIGURATION_ID0);
> > + d71->max_line_size = GCU_MAX_LINE_SIZE(value);
> > + d71->max_vsize = GCU_MAX_NUM_LINES(value);
> > +
> > + value = malidp_read32(d71->gcu_addr, GCU_CONFIGURATION_ID1);
> > + d71->num_rich_layers = GCU_NUM_RICH_LAYERS(value);
> > + d71->supports_dual_link = GCU_DISPLAY_SPLIT_EN(value);
> > + d71->integrates_tbu = GCU_DISPLAY_TBU_EN(value);
> > }
> >
> > - value = malidp_read32(d71->periph_addr, PERIPH_CONFIGURATION_ID);
> > -
> > - d71->max_line_size = value & PERIPH_MAX_LINE_SIZE ? 4096 : 2048;
> > - d71->max_vsize = 4096;
> > - d71->num_rich_layers = value & PERIPH_NUM_RICH_LAYERS ? 2 : 1;
> > - d71->supports_dual_link = value & PERIPH_SPLIT_EN ? true : false;
> > - d71->integrates_tbu = value & PERIPH_TBU_EN ? true : false;
> > -
> > for (i = 0; i < d71->num_pipelines; i++) {
> > pipe = komeda_pipeline_add(mdev, sizeof(struct d71_pipeline),
> > &d71_pipeline_funcs);
> > @@ -415,7 +425,7 @@ static int d71_enum_resources(struct komeda_dev *mdev)
> > }
> >
> > /* loop the register blks and probe */
> > - i = 2; /* exclude GCU and PERIPH */
> > + i = 1; /* exclude GCU */
> > offset = D71_BLOCK_SIZE; /* skip GCU */
> > while (i < d71->num_blocks) {
> > blk_base = mdev->reg_base + (offset >> 2);
> > @@ -425,9 +435,9 @@ static int d71_enum_resources(struct komeda_dev *mdev)
> > err = d71_probe_block(d71, &blk, blk_base);
> > if (err)
> > goto err_cleanup;
> > - i++;
> > }
> >
> > + i++;
>
> This change doesn't make much sense if you want to count how many
> blocks are available, since you're now counting the reserved ones, too.
That's because for D32 num_blocks includes the reserved blocks.
> On the counting note, the prior code rides on the assumption the periph
> block is last in the map, and I don't see how you still handle not
> counting it in the D71 case.
Since D71 has one reserved block, and now we count reserved block.
So now no matter D32 or D71:
num_blocks = n_valid_block + n_reserved_block + GCU.
Thanks
James
>
> > offset += D71_BLOCK_SIZE;
> > }
> >
> > @@ -603,6 +613,7 @@ d71_identify(u32 __iomem *reg_base, struct komeda_chip_info *chip)
> >
> > switch (product_id) {
> > case MALIDP_D71_PRODUCT_ID:
> > + case MALIDP_D32_PRODUCT_ID:
> > funcs = &d71_chip_funcs;
> > break;
> > default:
> > diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h b/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
> > index 1727dc993909..81de6a23e7f3 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
> > +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
> > @@ -72,6 +72,19 @@
> > #define GCU_CONTROL_MODE(x) ((x) & 0x7)
> > #define GCU_CONTROL_SRST BIT(16)
> >
> > +/* GCU_CONFIGURATION registers */
> > +#define GCU_CONFIGURATION_ID0 0x100
> > +#define GCU_CONFIGURATION_ID1 0x104
> > +
> > +/* GCU configuration */
> > +#define GCU_MAX_LINE_SIZE(x) ((x) & 0xFFFF)
> > +#define GCU_MAX_NUM_LINES(x) ((x) >> 16)
> > +#define GCU_NUM_RICH_LAYERS(x) ((x) & 0x7)
> > +#define GCU_NUM_PIPELINES(x) (((x) >> 3) & 0x7)
> > +#define GCU_NUM_SCALERS(x) (((x) >> 6) & 0x7)
> > +#define GCU_DISPLAY_SPLIT_EN(x) (((x) >> 16) & 0x1)
> > +#define GCU_DISPLAY_TBU_EN(x) (((x) >> 17) & 0x1)
> > +
> > /* GCU opmode */
> > #define INACTIVE_MODE 0
> > #define TBU_CONNECT_MODE 1
> > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> > index b7a1097c45c4..ad38bbc7431e 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> > @@ -125,6 +125,7 @@ static int komeda_platform_remove(struct platform_device *pdev)
> >
> > static const struct of_device_id komeda_of_match[] = {
> > { .compatible = "arm,mali-d71", .data = d71_identify, },
> > + { .compatible = "arm,mali-d32", .data = d71_identify, },
> > {},
> > };
> >
> >
>
>
> --
> Mihail
>
>
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