Re: [PATCH RFC v6 4/6] drm/sprd: add Unisoc's drm display controller driver

From: Kevin Tang
Date: Fri Aug 28 2020 - 13:08:55 EST

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Sam Ravnborg <sam@xxxxxxxxxxxx> 于2020年7月29日周三上午5:14写道：
>
> Hi Kevin.
>
> Some feedback in the following.
> I lost track of thing for the atomic modesettting stuff and I hope other
> will review that.
>
> Sam
>
> On Tue, Jul 28, 2020 at 06:07:57PM +0800, Kevin Tang wrote:
> > From: Kevin Tang <kevin.tang@xxxxxxxxxx>
> >
> > Adds DPU(Display Processor Unit) support for the Unisoc's display subsystem.
> > It's support multi planes, scaler, rotation, PQ(Picture Quality) and more.
> >
> > RFC v6:
> > - Access registers via readl/writel
> > - Checking for unsupported KMS properties (format, rotation, blend_mode, etc) on plane_check ops
> > - Remove always true checks for dpu core ops
> >
> > Cc: Orson Zhai <orsonzhai@xxxxxxxxx>
> > Cc: Chunyan Zhang <zhang.lyra@xxxxxxxxx>
> > Signed-off-by: Kevin Tang <kevin.tang@xxxxxxxxxx>
> > ---
> > drivers/gpu/drm/sprd/Makefile | 5 +-
> > drivers/gpu/drm/sprd/dpu/Makefile | 3 +
> > drivers/gpu/drm/sprd/dpu/dpu_r2p0.c | 503 ++++++++++++++++++++++++++++
> > drivers/gpu/drm/sprd/sprd_dpu.c | 646 ++++++++++++++++++++++++++++++++++++
> > drivers/gpu/drm/sprd/sprd_dpu.h | 187 +++++++++++
> > drivers/gpu/drm/sprd/sprd_drm.c | 1 +
> > drivers/gpu/drm/sprd/sprd_drm.h | 2 +
> > 7 files changed, 1346 insertions(+), 1 deletion(-)
> > create mode 100644 drivers/gpu/drm/sprd/dpu/Makefile
> > create mode 100644 drivers/gpu/drm/sprd/dpu/dpu_r2p0.c
> > create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.c
> > create mode 100644 drivers/gpu/drm/sprd/sprd_dpu.h
> >
> > diff --git a/drivers/gpu/drm/sprd/Makefile b/drivers/gpu/drm/sprd/Makefile
> > index 86d95d9..88ab32a 100644
> > --- a/drivers/gpu/drm/sprd/Makefile
> > +++ b/drivers/gpu/drm/sprd/Makefile
> > @@ -2,4 +2,7 @@
> >
> > subdir-ccflags-y += -I$(srctree)/$(src)
> Not needed - drop.
>
> >
> > -obj-y := sprd_drm.o
> > +obj-y := sprd_drm.o \
> > + sprd_dpu.o
> > +
> > +obj-y += dpu/
>
> Until there are several DPU's there is no need for a separate directory.
> Make it simpler by keeping it all in drm/sprd/*
Ok I will move DPU IP code to drm/sprd
>
> > diff --git a/drivers/gpu/drm/sprd/dpu/Makefile b/drivers/gpu/drm/sprd/dpu/Makefile
> > new file mode 100644
> > index 0000000..40278b6
> > --- /dev/null
> > +++ b/drivers/gpu/drm/sprd/dpu/Makefile
> > @@ -0,0 +1,3 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +obj-y += dpu_r2p0.o
> > diff --git a/drivers/gpu/drm/sprd/dpu/dpu_r2p0.c b/drivers/gpu/drm/sprd/dpu/dpu_r2p0.c
> > new file mode 100644
> > index 0000000..4b9521d
> > --- /dev/null
> > +++ b/drivers/gpu/drm/sprd/dpu/dpu_r2p0.c
> > @@ -0,0 +1,503 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (C) 2020 Unisoc Inc.
> > + */
> > +
> > +#include <linux/delay.h>
> > +#include <linux/io.h>
> > +#include <linux/wait.h>
> > +#include <linux/workqueue.h>
> > +
> > +#include "sprd_dpu.h"
> > +
> > +/* DPU registers size, 4 Bytes(32 Bits) */
> > +#define DPU_REG_SIZE 0x04
> > +
> > +/* Layer registers offset */
> > +#define DPU_LAY_REG_OFFSET 0x0C
> > +
> > +#define DPU_LAY_REG(reg, index) \
> > + (reg + index * DPU_LAY_REG_OFFSET * DPU_REG_SIZE)
> Use a static inline to get better typecheck.
>
> > +#define DPU_REG_RD(reg) readl_relaxed(reg)
> > +
> > +#define DPU_REG_WR(reg, mask) writel_relaxed(mask, reg)
> > +
> > +#define DPU_REG_SET(reg, mask) \
> > + writel_relaxed(readl_relaxed(reg) | mask, reg)
> > +
> > +#define DPU_REG_CLR(reg, mask) \
> > + writel_relaxed(readl_relaxed(reg) & ~mask, reg)
> I am no fan of macros used like this.
>
> Maybe use static inlines and add struct dpu_context * as first argument.
> Then adding base can be hidden away.

Maybe a good idea, i will try it, like this:
static inline void DPU_REG_CLR(dpu_context *ctx, u32 reg, u32 mask) {
writel_relaxed(readl_relaxed(ctx->base + reg) & ~mask, ctx->base + reg);
}

>
>
> I had a hard time convincing myself that _relaxed was the right
> variants. If I get it correct we may see writes re-ordered with the
> _relaxed variants wich would be no good when dealign with interrupts.
> But I may miss somethign here.
>
> > +
> > +/* Global control registers */
> > +#define REG_DPU_CTRL 0x04
> > +#define REG_DPU_CFG0 0x08
> > +#define REG_DPU_CFG1 0x0C
> > +#define REG_DPU_CFG2 0x10
> > +#define REG_PANEL_SIZE 0x20
> > +#define REG_BLEND_SIZE 0x24
> > +#define REG_BG_COLOR 0x2C
> > +
> > +/* Layer0 control registers */
> > +#define REG_LAY_BASE_ADDR0 0x30
> > +#define REG_LAY_BASE_ADDR1 0x34
> > +#define REG_LAY_BASE_ADDR2 0x38
> > +#define REG_LAY_CTRL 0x40
> > +#define REG_LAY_SIZE 0x44
> > +#define REG_LAY_PITCH 0x48
> > +#define REG_LAY_POS 0x4C
> > +#define REG_LAY_ALPHA 0x50
> > +#define REG_LAY_PALLETE 0x58
> > +#define REG_LAY_CROP_START 0x5C
> > +
> > +/* Interrupt control registers */
> > +#define REG_DPU_INT_EN 0x1E0
> > +#define REG_DPU_INT_CLR 0x1E4
> > +#define REG_DPU_INT_STS 0x1E8
> > +
> > +/* DPI control registers */
> > +#define REG_DPI_CTRL 0x1F0
> > +#define REG_DPI_H_TIMING 0x1F4
> > +#define REG_DPI_V_TIMING 0x1F8
> > +
> > +/* MMU control registers */
> > +#define REG_MMU_EN 0x800
> > +#define REG_MMU_VPN_RANGE 0x80C
> > +#define REG_MMU_VAOR_ADDR_RD 0x818
> > +#define REG_MMU_VAOR_ADDR_WR 0x81C
> > +#define REG_MMU_INV_ADDR_RD 0x820
> > +#define REG_MMU_INV_ADDR_WR 0x824
> > +#define REG_MMU_PPN1 0x83C
> > +#define REG_MMU_RANGE1 0x840
> > +#define REG_MMU_PPN2 0x844
> > +#define REG_MMU_RANGE2 0x848
> > +
> > +/* Global control bits */
> > +#define BIT_DPU_RUN BIT(0)
> > +#define BIT_DPU_STOP BIT(1)
> > +#define BIT_DPU_REG_UPDATE BIT(2)
> > +#define BIT_DPU_IF_EDPI BIT(0)
> > +#define BIT_DPU_COEF_NARROW_RANGE BIT(4)
> > +#define BIT_DPU_Y2R_COEF_ITU709_STANDARD BIT(5)
> > +
> > +/* Layer control bits */
> > +#define BIT_DPU_LAY_EN BIT(0)
> > +
> > +/* Interrupt control & status bits */
> > +#define BIT_DPU_INT_DONE BIT(0)
> > +#define BIT_DPU_INT_TE BIT(1)
> > +#define BIT_DPU_INT_ERR BIT(2)
> > +#define BIT_DPU_INT_UPDATE_DONE BIT(4)
> > +#define BIT_DPU_INT_VSYNC BIT(5)
> > +#define BIT_DPU_INT_FBC_PLD_ERR BIT(8)
> > +#define BIT_DPU_INT_FBC_HDR_ERR BIT(9)
> > +#define BIT_DPU_INT_MMU_VAOR_RD BIT(16)
> > +#define BIT_DPU_INT_MMU_VAOR_WR BIT(17)
> > +#define BIT_DPU_INT_MMU_INV_RD BIT(18)
> > +#define BIT_DPU_INT_MMU_INV_WR BIT(19)
> > +
> > +/* DPI control bits */
> > +#define BIT_DPU_EDPI_TE_EN BIT(8)
> > +#define BIT_DPU_EDPI_FROM_EXTERNAL_PAD BIT(10)
> > +#define BIT_DPU_DPI_HALT_EN BIT(16)
> > +
> > +
> > +static u32 check_mmu_isr(struct dpu_context *ctx, u32 reg_val)
> > +{
> > + u32 mmu_mask = BIT_DPU_INT_MMU_VAOR_RD |
> > + BIT_DPU_INT_MMU_VAOR_WR |
> > + BIT_DPU_INT_MMU_INV_RD |
> > + BIT_DPU_INT_MMU_INV_WR;
> > + u32 val = reg_val & mmu_mask;
> > + int i;
> > +
> > + if (val) {
> > + DRM_ERROR("--- iommu interrupt err: 0x%04x ---\n", val);
>
> General comment, applies for the whole patch.
>
> Use drm_err(drm, ...), drm_info(drm, ...) etc.
>
> Use upclassing to get sprd_dpu - and then you have a drm_device *
> (After drm_device is embedded in sprd_dpu as suggested in the other
> mail)
Ok, i will replace DRM_XXX with drm_xxx.
>
> > +
> > + if (val & BIT_DPU_INT_MMU_INV_RD)
> > + DRM_ERROR("iommu invalid read error, addr: 0x%08x\n",
> > + DPU_REG_RD(ctx->base + REG_MMU_INV_ADDR_RD));
> > + if (val & BIT_DPU_INT_MMU_INV_WR)
> > + DRM_ERROR("iommu invalid write error, addr: 0x%08x\n",
> > + DPU_REG_RD(ctx->base + REG_MMU_INV_ADDR_WR));
> > + if (val & BIT_DPU_INT_MMU_VAOR_RD)
> > + DRM_ERROR("iommu va out of range read error, addr: 0x%08x\n",
> > + DPU_REG_RD(ctx->base + REG_MMU_VAOR_ADDR_RD));
> > + if (val & BIT_DPU_INT_MMU_VAOR_WR)
> > + DRM_ERROR("iommu va out of range write error, addr: 0x%08x\n",
> > + DPU_REG_RD(ctx->base + REG_MMU_VAOR_ADDR_WR));
> > +
> > + for (i = 0; i < 8; i++) {
> > + reg_val = DPU_REG_RD(ctx->base + DPU_LAY_REG(REG_LAY_CTRL, i));
> > + if (reg_val & 0x1)
> > + DRM_INFO("layer%d: 0x%08x 0x%08x 0x%08x ctrl: 0x%08x\n", i,
> > + DPU_REG_RD(ctx->base + DPU_LAY_REG(REG_LAY_BASE_ADDR0, i)),
> > + DPU_REG_RD(ctx->base + DPU_LAY_REG(REG_LAY_BASE_ADDR1, i)),
> > + DPU_REG_RD(ctx->base + DPU_LAY_REG(REG_LAY_BASE_ADDR2, i)),
> > + DPU_REG_RD(ctx->base + DPU_LAY_REG(REG_LAY_CTRL, i)));
> > + }
> > + }
> > +
> > + return val;
> > +}
> > +
> > +static void dpu_clean_all(struct dpu_context *ctx)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < 8; i++)
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_CTRL, i), 0x00);
> > +}
> > +
> > +static u32 dpu_isr(struct dpu_context *ctx)
> > +{
> > + u32 reg_val, int_mask = 0;
> > +
> > + reg_val = DPU_REG_RD(ctx->base + REG_DPU_INT_STS);
> > +
> > + /* disable err interrupt */
> > + if (reg_val & BIT_DPU_INT_ERR)
> > + int_mask |= BIT_DPU_INT_ERR;
> > +
> > + /* dpu update done isr */
> > + if (reg_val & BIT_DPU_INT_UPDATE_DONE) {
> > + ctx->evt_update = true;
> > + wake_up_interruptible_all(&ctx->wait_queue);
> > + }
> > +
> > + /* dpu stop done isr */
> > + if (reg_val & BIT_DPU_INT_DONE) {
> > + ctx->evt_stop = true;
> > + wake_up_interruptible_all(&ctx->wait_queue);
> > + }
> > +
> > + /* dpu ifbc payload error isr */
> > + if (reg_val & BIT_DPU_INT_FBC_PLD_ERR) {
> > + int_mask |= BIT_DPU_INT_FBC_PLD_ERR;
> > + DRM_ERROR("dpu ifbc payload error\n");
> > + }
> > +
> > + /* dpu ifbc header error isr */
> > + if (reg_val & BIT_DPU_INT_FBC_HDR_ERR) {
> > + int_mask |= BIT_DPU_INT_FBC_HDR_ERR;
> > + DRM_ERROR("dpu ifbc header error\n");
> > + }
> > +
> > + int_mask |= check_mmu_isr(ctx, reg_val);
> > +
> > + DPU_REG_WR(ctx->base + REG_DPU_INT_CLR, reg_val);
> > + DPU_REG_CLR(ctx->base + REG_DPU_INT_EN, int_mask);
> > +
> > + return reg_val;
> > +}
> > +
> > +static int dpu_wait_stop_done(struct dpu_context *ctx)
> > +{
> > + int rc;
> > +
> > + if (ctx->stopped)
> > + return 0;
> > +
> > + rc = wait_event_interruptible_timeout(ctx->wait_queue, ctx->evt_stop,
> > + msecs_to_jiffies(500));
> > + ctx->evt_stop = false;
> > +
> > + ctx->stopped = true;
> > +
> > + if (!rc) {
> > + DRM_ERROR("dpu wait for stop done time out!\n");
> > + return -ETIMEDOUT;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int dpu_wait_update_done(struct dpu_context *ctx)
> > +{
> > + int rc;
> > +
> > + ctx->evt_update = false;
> > +
> > + rc = wait_event_interruptible_timeout(ctx->wait_queue, ctx->evt_update,
> > + msecs_to_jiffies(500));
> > +
> > + if (!rc) {
> > + DRM_ERROR("dpu wait for reg update done time out!\n");
> > + return -ETIMEDOUT;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static void dpu_stop(struct dpu_context *ctx)
> > +{
> > + if (ctx->if_type == SPRD_DPU_IF_DPI)
> > + DPU_REG_SET(ctx->base + REG_DPU_CTRL, BIT_DPU_STOP);
> > +
> > + dpu_wait_stop_done(ctx);
> > +}
> > +
> > +static void dpu_run(struct dpu_context *ctx)
> > +{
> > + DPU_REG_SET(ctx->base + REG_DPU_CTRL, BIT_DPU_RUN);
> > +
> > + ctx->stopped = false;
> > +}
> > +
> > +static void dpu_init(struct dpu_context *ctx)
> > +{
> > + u32 reg_val, size;
> > +
> > + DPU_REG_WR(ctx->base + REG_BG_COLOR, 0x00);
> > +
> > + size = (ctx->vm.vactive << 16) | ctx->vm.hactive;
> > +
> > + DPU_REG_WR(ctx->base + REG_PANEL_SIZE, size);
> > + DPU_REG_WR(ctx->base + REG_BLEND_SIZE, size);
> > +
> > + reg_val = BIT_DPU_COEF_NARROW_RANGE | BIT_DPU_Y2R_COEF_ITU709_STANDARD;
> > + DPU_REG_WR(ctx->base + REG_DPU_CFG0, reg_val);
> > + DPU_REG_WR(ctx->base + REG_DPU_CFG1, 0x004466da);
> > + DPU_REG_WR(ctx->base + REG_DPU_CFG2, 0x00);
> > +
> > + if (ctx->stopped)
> > + dpu_clean_all(ctx);
> > +
> > + DPU_REG_WR(ctx->base + REG_MMU_EN, 0x00);
> > + DPU_REG_WR(ctx->base + REG_MMU_PPN1, 0x00);
> > + DPU_REG_WR(ctx->base + REG_MMU_RANGE1, 0xffff);
> > + DPU_REG_WR(ctx->base + REG_MMU_PPN2, 0x00);
> > + DPU_REG_WR(ctx->base + REG_MMU_RANGE2, 0xffff);
> > + DPU_REG_WR(ctx->base + REG_MMU_VPN_RANGE, 0x1ffff);
> > +
> > + DPU_REG_WR(ctx->base + REG_DPU_INT_CLR, 0xffff);
> > +}
> > +
> > +static void dpu_fini(struct dpu_context *ctx)
> > +{
> > + DPU_REG_WR(ctx->base + REG_DPU_INT_EN, 0x00);
> > + DPU_REG_WR(ctx->base + REG_DPU_INT_CLR, 0xff);
> > +}
> > +
> > +static void dpu_layer(struct dpu_context *ctx,
> > + struct dpu_layer *hwlayer)
> No linebreak needed here.
>
> > +{
> > + const struct drm_format_info *info;
> > + u32 size, offset, ctrl, pitch;
> > + int i;
> > +
> > + offset = (hwlayer->dst_x & 0xffff) | ((hwlayer->dst_y) << 16);
> > +
> > + if (hwlayer->src_w && hwlayer->src_h)
> > + size = (hwlayer->src_w & 0xffff) | ((hwlayer->src_h) << 16);
> > + else
> > + size = (hwlayer->dst_w & 0xffff) | ((hwlayer->dst_h) << 16);
> > +
> > + for (i = 0; i < hwlayer->planes; i++)
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_BASE_ADDR0,
> > + hwlayer->index), hwlayer->addr[i]);
> > +
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_POS,
> > + hwlayer->index), offset);
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_SIZE,
> > + hwlayer->index), size);
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_CROP_START,
> > + hwlayer->index), hwlayer->src_y << 16 | hwlayer->src_x);
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_ALPHA,
> > + hwlayer->index), hwlayer->alpha);
> > +
> > + info = drm_format_info(hwlayer->format);
> > + if (hwlayer->planes == 3) {
> > + /* UV pitch is 1/2 of Y pitch*/
> > + pitch = (hwlayer->pitch[0] / info->cpp[0]) |
> > + (hwlayer->pitch[0] / info->cpp[0] << 15);
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_PITCH,
> > + hwlayer->index), pitch);
> > + } else {
> > + pitch = hwlayer->pitch[0] / info->cpp[0];
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_PITCH,
> > + hwlayer->index), pitch);
> > + }
> > +
> > + ctrl = hwlayer->format |
> > + hwlayer->blending |
> > + (hwlayer->rotation & 0x7) << 20;
> > +
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_CTRL,
> > + hwlayer->index), ctrl);
> > + DPU_REG_WR(ctx->base + DPU_LAY_REG(REG_LAY_CTRL,
> > + hwlayer->index), BIT_DPU_LAY_EN);
> > +
> > + DRM_DEBUG("dst_x = %d, dst_y = %d, dst_w = %d, dst_h = %d\n",
> > + hwlayer->dst_x, hwlayer->dst_y,
> > + hwlayer->dst_w, hwlayer->dst_h);
> > + DRM_DEBUG("start_x = %d, start_y = %d, start_w = %d, start_h = %d\n",
> > + hwlayer->src_x, hwlayer->src_y,
> > + hwlayer->src_w, hwlayer->src_h);
> > +}
> > +
> > +static void dpu_flip(struct dpu_context *ctx,
> > + struct dpu_layer layers[], u8 count)
> > +{
> > + int i;
> > + u32 reg_val;
> > +
> > + /*
> > + * Make sure the dpu is in stop status. DPU_R2P0 has no shadow
> > + * registers in EDPI mode. So the config registers can only be
> > + * updated in the rising edge of DPU_RUN bit.
> > + */
> > + if (ctx->if_type == SPRD_DPU_IF_EDPI)
> > + dpu_wait_stop_done(ctx);
> > +
> > + /* reset the bgcolor to black */
> > + DPU_REG_WR(ctx->base + REG_BG_COLOR, 0x00);
> > +
> > + /* disable all the layers */
> > + dpu_clean_all(ctx);
> > +
> > + /* start configure dpu layers */
> > + for (i = 0; i < count; i++)
> > + dpu_layer(ctx, &layers[i]);
> > +
> > + /* update trigger and wait */
> > + if (ctx->if_type == SPRD_DPU_IF_DPI) {
> > + if (!ctx->stopped) {
> > + DPU_REG_SET(ctx->base + REG_DPU_CTRL, BIT_DPU_REG_UPDATE);
> > + dpu_wait_update_done(ctx);
> > + }
> > +
> > + DPU_REG_SET(ctx->base + REG_DPU_INT_EN, BIT_DPU_INT_ERR);
> > + } else if (ctx->if_type == SPRD_DPU_IF_EDPI) {
> > + DPU_REG_SET(ctx->base + REG_DPU_CTRL, BIT_DPU_RUN);
> > +
> > + ctx->stopped = false;
> > + }
> > +
> > + /*
> > + * If the following interrupt was disabled in isr,
> > + * re-enable it.
> > + */
> > + reg_val = BIT_DPU_INT_FBC_PLD_ERR |
> > + BIT_DPU_INT_FBC_HDR_ERR |
> > + BIT_DPU_INT_MMU_VAOR_RD |
> > + BIT_DPU_INT_MMU_VAOR_WR |
> > + BIT_DPU_INT_MMU_INV_RD |
> > + BIT_DPU_INT_MMU_INV_WR;
> > + DPU_REG_SET(ctx->base + REG_DPU_INT_EN, reg_val);
> > +
> > +}
> > +
> > +static void dpu_dpi_init(struct dpu_context *ctx)
> > +{
> > + u32 int_mask = 0;
> > + u32 reg_val;
> > +
> > + if (ctx->if_type == SPRD_DPU_IF_DPI) {
> > + /* use dpi as interface */
> > + DPU_REG_CLR(ctx->base + REG_DPU_CFG0, BIT_DPU_IF_EDPI);
> > +
> > + /* disable Halt function for SPRD DSI */
> > + DPU_REG_CLR(ctx->base + REG_DPI_CTRL, BIT_DPU_DPI_HALT_EN);
> > +
> > + /* select te from external pad */
> > + DPU_REG_SET(ctx->base + REG_DPI_CTRL, BIT_DPU_EDPI_FROM_EXTERNAL_PAD);
> > +
> > + /* set dpi timing */
> > + reg_val = ctx->vm.hsync_len << 0 |
> > + ctx->vm.hback_porch << 8 |
> > + ctx->vm.hfront_porch << 20;
> > + DPU_REG_WR(ctx->base + REG_DPI_H_TIMING, reg_val);
> > +
> > + reg_val = ctx->vm.vsync_len << 0 |
> > + ctx->vm.vback_porch << 8 |
> > + ctx->vm.vfront_porch << 20;
> > + DPU_REG_WR(ctx->base + REG_DPI_V_TIMING, reg_val);
> > +
> > + if (ctx->vm.vsync_len + ctx->vm.vback_porch < 32)
> > + DRM_WARN("Warning: (vsync + vbp) < 32, "
> > + "underflow risk!\n");
> > +
> > + /* enable dpu update done INT */
> > + int_mask |= BIT_DPU_INT_UPDATE_DONE;
> > + /* enable dpu DONE INT */
> > + int_mask |= BIT_DPU_INT_DONE;
> > + /* enable dpu dpi vsync */
> > + int_mask |= BIT_DPU_INT_VSYNC;
> > + /* enable dpu TE INT */
> > + int_mask |= BIT_DPU_INT_TE;
> > + /* enable underflow err INT */
> > + int_mask |= BIT_DPU_INT_ERR;
> > + } else if (ctx->if_type == SPRD_DPU_IF_EDPI) {
> > + /* use edpi as interface */
> > + DPU_REG_SET(ctx->base + REG_DPU_CFG0, BIT_DPU_IF_EDPI);
> > +
> > + /* use external te */
> > + DPU_REG_SET(ctx->base + REG_DPI_CTRL, BIT_DPU_EDPI_FROM_EXTERNAL_PAD);
> > +
> > + /* enable te */
> > + DPU_REG_SET(ctx->base + REG_DPI_CTRL, BIT_DPU_EDPI_TE_EN);
> > +
> > + /* enable stop DONE INT */
> > + int_mask |= BIT_DPU_INT_DONE;
> > + /* enable TE INT */
> > + int_mask |= BIT_DPU_INT_TE;
> > + }
> > +
> > + /* enable ifbc payload error INT */
> > + int_mask |= BIT_DPU_INT_FBC_PLD_ERR;
> > + /* enable ifbc header error INT */
> > + int_mask |= BIT_DPU_INT_FBC_HDR_ERR;
> > + /* enable iommu va out of range read error INT */
> > + int_mask |= BIT_DPU_INT_MMU_VAOR_RD;
> > + /* enable iommu va out of range write error INT */
> > + int_mask |= BIT_DPU_INT_MMU_VAOR_WR;
> > + /* enable iommu invalid read error INT */
> > + int_mask |= BIT_DPU_INT_MMU_INV_RD;
> > + /* enable iommu invalid write error INT */
> > + int_mask |= BIT_DPU_INT_MMU_INV_WR;
> > +
> > + DPU_REG_WR(ctx->base + REG_DPU_INT_EN, int_mask);
> > +}
> > +
> > +static void enable_vsync(struct dpu_context *ctx)
> > +{
> > + DPU_REG_SET(ctx->base + REG_DPU_INT_EN, BIT_DPU_INT_VSYNC);
> > +}
> > +
> > +static void disable_vsync(struct dpu_context *ctx)
> > +{
> > + DPU_REG_CLR(ctx->base + REG_DPU_INT_EN, BIT_DPU_INT_VSYNC);
> > +}
> > +
> > +static const u32 primary_fmts[] = {
> > + DRM_FORMAT_XRGB8888, DRM_FORMAT_XBGR8888,
> > + DRM_FORMAT_ARGB8888, DRM_FORMAT_ABGR8888,
> > + DRM_FORMAT_RGBA8888, DRM_FORMAT_BGRA8888,
> > + DRM_FORMAT_RGBX8888, DRM_FORMAT_RGB565,
> > + DRM_FORMAT_BGR565, DRM_FORMAT_NV12,
> > + DRM_FORMAT_NV21, DRM_FORMAT_NV16,
> > + DRM_FORMAT_NV61, DRM_FORMAT_YUV420,
> > + DRM_FORMAT_YVU420,
> > +};
> One format per line improves readability a lot.
> Maybe sort alphbetically too.
>
> > +
> > +static void dpu_capability(struct dpu_context *ctx,
> > + struct dpu_capability *cap)
> Drop linebreak
>
> > +{
> > + cap->max_layers = 6;
> > + cap->fmts_ptr = primary_fmts;
> > + cap->fmts_cnt = ARRAY_SIZE(primary_fmts);
> > +}
> > +
> > +const struct dpu_core_ops dpu_r2p0_core_ops = {
> > + .init = dpu_init,
> > + .fini = dpu_fini,
> > + .run = dpu_run,
> > + .stop = dpu_stop,
> > + .isr = dpu_isr,
> > + .ifconfig = dpu_dpi_init,
> > + .capability = dpu_capability,
> > + .flip = dpu_flip,
> > + .enable_vsync = enable_vsync,
> > + .disable_vsync = disable_vsync,
> > +};
> > diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
> > new file mode 100644
> > index 0000000..5ec8e7c
> > --- /dev/null
> > +++ b/drivers/gpu/drm/sprd/sprd_dpu.c
> > @@ -0,0 +1,646 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (C) 2020 Unisoc Inc.
> > + */
> > +
> > +#include <linux/component.h>
> > +#include <linux/dma-buf.h>
> > +#include <linux/module.h>
> > +#include <linux/of.h>
> > +#include <linux/of_address.h>
> > +#include <linux/of_device.h>
> > +#include <linux/of_irq.h>
> > +
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_fb_cma_helper.h>
> > +#include <drm/drm_gem_cma_helper.h>
> > +#include <drm/drm_gem_framebuffer_helper.h>
> > +#include <drm/drm_plane_helper.h>
> > +
> > +#include "sprd_drm.h"
> > +#include "sprd_dpu.h"
> > +
> > +struct sprd_plane {
> > + struct drm_plane plane;
> > + u32 index;
> > + u32 addr[4];
> > + u32 pitch[4];
> > + u32 format;
> > + u32 rotation;
> > + u32 blend_mode;
> > +};
> > +
> > +static void sprd_dpu_init(struct sprd_dpu *dpu);
> > +static void sprd_dpu_fini(struct sprd_dpu *dpu);
> > +
> > +static inline struct sprd_plane *to_sprd_plane(struct drm_plane *plane)
> > +{
> > + return container_of(plane, struct sprd_plane, plane);
> > +}
> > +
> > +static int sprd_plane_format_convert(u32 fourcc, u32 *format)
> > +{
> > + switch (fourcc) {
> > + case DRM_FORMAT_BGRA8888:
> > + /* BGRA8888 -> ARGB8888 */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
> > + *format |= BIT_DPU_LAY_FORMAT_ARGB8888;
> > + break;
> > + case DRM_FORMAT_RGBX8888:
> > + case DRM_FORMAT_RGBA8888:
> > + /* RGBA8888 -> ABGR8888 */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
> > + /* FALLTHRU */
> > + case DRM_FORMAT_ABGR8888:
> > + /* RB switch */
> > + *format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
> > + /* FALLTHRU */
> > + case DRM_FORMAT_ARGB8888:
> > + *format |= BIT_DPU_LAY_FORMAT_ARGB8888;
> > + break;
> > + case DRM_FORMAT_XBGR8888:
> > + /* RB switch */
> > + *format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
> > + /* FALLTHRU */
> > + case DRM_FORMAT_XRGB8888:
> > + *format |= BIT_DPU_LAY_FORMAT_ARGB8888;
> > + break;
> > + case DRM_FORMAT_BGR565:
> > + /* RB switch */
> > + *format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
> > + /* FALLTHRU */
> > + case DRM_FORMAT_RGB565:
> > + *format |= BIT_DPU_LAY_FORMAT_RGB565;
> > + break;
> > + case DRM_FORMAT_NV12:
> > + /* 2-Lane: Yuv420 */
> > + *format |= BIT_DPU_LAY_FORMAT_YUV420_2PLANE;
> > + /* Y endian */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
> > + /* UV endian */
> > + *format |= BIT_DPU_LAY_NO_SWITCH;
> > + break;
> > + case DRM_FORMAT_NV21:
> > + /* 2-Lane: Yuv420 */
> > + *format |= BIT_DPU_LAY_FORMAT_YUV420_2PLANE;
> > + /* Y endian */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
> > + /* UV endian */
> > + *format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
> > + break;
> > + case DRM_FORMAT_NV16:
> > + /* 2-Lane: Yuv422 */
> > + *format |= BIT_DPU_LAY_FORMAT_YUV422_2PLANE;
> > + /* Y endian */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0;
> > + /* UV endian */
> > + *format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
> > + break;
> > + case DRM_FORMAT_NV61:
> > + /* 2-Lane: Yuv422 */
> > + *format |= BIT_DPU_LAY_FORMAT_YUV422_2PLANE;
> > + /* Y endian */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
> > + /* UV endian */
> > + *format |= BIT_DPU_LAY_NO_SWITCH;
> > + break;
> > + case DRM_FORMAT_YUV420:
> > + *format |= BIT_DPU_LAY_FORMAT_YUV420_3PLANE;
> > + /* Y endian */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
> > + /* UV endian */
> > + *format |= BIT_DPU_LAY_NO_SWITCH;
> > + break;
> > + case DRM_FORMAT_YVU420:
> > + *format |= BIT_DPU_LAY_FORMAT_YUV420_3PLANE;
> > + /* Y endian */
> > + *format |= BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3;
> > + /* UV endian */
> > + *format |= BIT_DPU_LAY_RB_OR_UV_SWITCH;
> > + break;
> > + default:
> > + return -EINVAL;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int sprd_plane_rotation_convert(u32 angle, u32 *rotation)
> > +{
> > + switch (angle) {
> > + case DRM_MODE_ROTATE_0:
> > + *rotation = DPU_LAYER_ROTATION_0;
> > + break;
> > + case DRM_MODE_ROTATE_90:
> > + *rotation = DPU_LAYER_ROTATION_90;
> > + break;
> > + case DRM_MODE_ROTATE_180:
> > + *rotation = DPU_LAYER_ROTATION_180;
> > + break;
> > + case DRM_MODE_ROTATE_270:
> > + *rotation = DPU_LAYER_ROTATION_270;
> > + break;
> > + case DRM_MODE_REFLECT_Y:
> > + *rotation = DPU_LAYER_ROTATION_180_M;
> > + break;
> > + case (DRM_MODE_REFLECT_Y | DRM_MODE_ROTATE_90):
> > + *rotation = DPU_LAYER_ROTATION_90_M;
> > + break;
> > + case DRM_MODE_REFLECT_X:
> > + *rotation = DPU_LAYER_ROTATION_0_M;
> > + break;
> > + case (DRM_MODE_REFLECT_X | DRM_MODE_ROTATE_90):
> > + *rotation = DPU_LAYER_ROTATION_270_M;
> > + break;
> > + default:
> > + return -EINVAL;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int sprd_plane_atomic_check(struct drm_plane *plane,
> > + struct drm_plane_state *state)
> > +{
> > + struct sprd_plane *p = to_sprd_plane(plane);
> > + struct drm_framebuffer *fb = state->fb;
> > + struct drm_gem_cma_object *cma_obj;
> > + int i, ret;
> > + u32 addr;
> > +
> > + if (!state->fb || !state->crtc)
> > + return 0;
> > +
> > + ret = sprd_plane_format_convert(fb->format->format,
> > + &p->format);
> > + if (ret < 0) {
> > + DRM_ERROR("Invalid plane format\n");
> > + return ret;
> > + }
> > +
> > + ret = sprd_plane_rotation_convert(state->rotation,
> > + &p->rotation);
> > + if (ret < 0) {
> > + DRM_ERROR("Invalid plane rotation\n");
> > + return ret;
> > + }
> > +
> > + switch (state->pixel_blend_mode) {
> > + case DRM_MODE_BLEND_COVERAGE:
> > + /* alpha mode select - combo alpha */
> > + p->blend_mode |= BIT_DPU_LAY_COMBO_ALPHA;
> > + /* Normal mode */
> > + p->blend_mode |= BIT_DPU_LAY_MODE_BLEND_NORMAL;
> > + break;
> > + case DRM_MODE_BLEND_PREMULTI:
> > + /* alpha mode select - combo alpha */
> > + p->blend_mode |= BIT_DPU_LAY_COMBO_ALPHA;
> > + /* Pre-mult mode */
> > + p->blend_mode |= BIT_DPU_LAY_MODE_BLEND_PREMULT;
> > + break;
> > + case DRM_MODE_BLEND_PIXEL_NONE:
> > + default:
> > + /* don't do blending, maybe RGBX */
> > + /* alpha mode select - layer alpha */
> > + p->blend_mode |= BIT_DPU_LAY_LAYER_ALPHA;
> > + break;
> > + }
> > +
> > + for (i = 0; i < fb->format->num_planes; i++) {
> > + cma_obj = drm_fb_cma_get_gem_obj(fb, i);
> > + addr = cma_obj->paddr + fb->offsets[i];
> > + if (addr % 16) {
> > + DRM_ERROR("layer addr[%d] is not 16 bytes align, it's 0x%08x\n",
> > + i, addr);
> > + return -EFAULT;
> > + }
> > +
> > + p->addr[i] = addr;
> > + p->pitch[i] = fb->pitches[i];
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static void sprd_plane_atomic_update(struct drm_plane *plane,
> > + struct drm_plane_state *old_state)
> > +{
> > + struct drm_plane_state *state = plane->state;
> > + struct drm_framebuffer *fb = plane->state->fb;
> > + struct sprd_plane *p = to_sprd_plane(plane);
> > + struct sprd_dpu *dpu = crtc_to_dpu(plane->state->crtc);
> > + struct dpu_layer *layer = &dpu->layers[p->index];
> > + int i;
> > +
> > + if (!state->crtc || !state->fb)
> > + return;
> > +
> > + layer->index = p->index;
> > + layer->src_x = state->src_x >> 16;
> > + layer->src_y = state->src_y >> 16;
> > + layer->src_w = state->src_w >> 16;
> > + layer->src_h = state->src_h >> 16;
> > + layer->dst_x = state->crtc_x;
> > + layer->dst_y = state->crtc_y;
> > + layer->dst_w = state->crtc_w;
> > + layer->dst_h = state->crtc_h;
> > + layer->alpha = state->alpha;
> > + layer->format = p->format;
> > + layer->blending = p->blend_mode;
> > + layer->rotation = p->rotation;
> > + layer->planes = fb->format->num_planes;
> > +
> > + for (i = 0; i < layer->planes; i++) {
> > + layer->addr[i] = p->addr[i];
> > + layer->pitch[i] = p->pitch[i];
> > + }
> > +
> > + dpu->pending_planes++;
> > +}
> > +
> > +static void sprd_plane_create_properties(struct sprd_plane *p, int index)
> > +{
> > + unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
> > + BIT(DRM_MODE_BLEND_PREMULTI) |
> > + BIT(DRM_MODE_BLEND_COVERAGE);
> > +
> > + /* create rotation property */
> > + drm_plane_create_rotation_property(&p->plane,
> > + DRM_MODE_ROTATE_0,
> > + DRM_MODE_ROTATE_MASK |
> > + DRM_MODE_REFLECT_MASK);
> > +
> > + /* create alpha property */
> > + drm_plane_create_alpha_property(&p->plane);
> > +
> > + /* create blend mode property */
> > + drm_plane_create_blend_mode_property(&p->plane, supported_modes);
> > +
> > + /* create zpos property */
> > + drm_plane_create_zpos_immutable_property(&p->plane, index);
> > +}
> > +
> > +static const struct drm_plane_helper_funcs sprd_plane_helper_funcs = {
> > + .atomic_check = sprd_plane_atomic_check,
> > + .atomic_update = sprd_plane_atomic_update,
> > +};
> > +
> > +static const struct drm_plane_funcs sprd_plane_funcs = {
> > + .update_plane = drm_atomic_helper_update_plane,
> > + .disable_plane = drm_atomic_helper_disable_plane,
> > + .destroy = drm_plane_cleanup,
> > + .reset = drm_atomic_helper_plane_reset,
> > + .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
> > + .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
> > +};
> > +
> > +static struct drm_plane *sprd_plane_init(struct drm_device *drm,
> > + struct sprd_dpu *dpu)
> > +{
> > + struct drm_plane *primary = NULL;
> > + struct sprd_plane *p = NULL;
> > + struct dpu_capability cap = {};
> > + int ret, i;
> > +
> > + dpu->core->capability(&dpu->ctx, &cap);
> > +
> > + dpu->layers = devm_kcalloc(drm->dev, cap.max_layers,
> > + sizeof(struct dpu_layer), GFP_KERNEL);
> > + if (!dpu->layers)
> > + return ERR_PTR(-ENOMEM);
> > +
> > + for (i = 0; i < cap.max_layers; i++) {
> > +
> > + p = devm_kzalloc(drm->dev, sizeof(*p), GFP_KERNEL);
> > + if (!p)
> > + return ERR_PTR(-ENOMEM);
> > +
> > + ret = drm_universal_plane_init(drm, &p->plane, 1,
> > + &sprd_plane_funcs, cap.fmts_ptr,
> > + cap.fmts_cnt, NULL,
> > + DRM_PLANE_TYPE_PRIMARY, NULL);
> > + if (ret) {
> > + DRM_ERROR("fail to init primary plane\n");
> > + return ERR_PTR(ret);
> > + }
> > +
> > + drm_plane_helper_add(&p->plane, &sprd_plane_helper_funcs);
> > +
> > + sprd_plane_create_properties(p, i);
> > +
> > + p->index = i;
> > + if (i == 0)
> > + primary = &p->plane;
> > + }
> > +
> > + return primary;
> > +}
> > +
> > +static enum drm_mode_status sprd_crtc_mode_valid(struct drm_crtc *crtc,
> > + const struct drm_display_mode *mode)
> > +{
> > + struct sprd_dpu *dpu = crtc_to_dpu(crtc);
> > +
> > + DRM_DEBUG("%s() mode: "DRM_MODE_FMT"\n", __func__, DRM_MODE_ARG(mode));
> > +
> > + if (mode->type & DRM_MODE_TYPE_PREFERRED) {
> > + drm_display_mode_to_videomode(mode, &dpu->ctx.vm);
> > +
> > + if ((mode->hdisplay == mode->htotal) ||
> > + (mode->vdisplay == mode->vtotal))
> > + dpu->ctx.if_type = SPRD_DPU_IF_EDPI;
> > + else
> > + dpu->ctx.if_type = SPRD_DPU_IF_DPI;
> > + }
> > +
> > + return MODE_OK;
> > +}
> > +
> > +static void sprd_crtc_atomic_enable(struct drm_crtc *crtc,
> > + struct drm_crtc_state *old_state)
> > +{
> > + struct sprd_dpu *dpu = crtc_to_dpu(crtc);
> > +
> > + sprd_dpu_init(dpu);
> > +
> > + enable_irq(dpu->ctx.irq);
> > +}
> > +
> > +static void sprd_crtc_atomic_disable(struct drm_crtc *crtc,
> > + struct drm_crtc_state *old_state)
> > +{
> > + struct sprd_dpu *dpu = crtc_to_dpu(crtc);
> > + struct drm_device *drm = dpu->crtc.dev;
> > +
> > + disable_irq(dpu->ctx.irq);
> > +
> > + sprd_dpu_fini(dpu);
> > +
> > + spin_lock_irq(&drm->event_lock);
> > + if (crtc->state->event) {
> > + drm_crtc_send_vblank_event(crtc, crtc->state->event);
> > + crtc->state->event = NULL;
> > + }
> > + spin_unlock_irq(&drm->event_lock);
> > +}
> > +
> > +static int sprd_crtc_atomic_check(struct drm_crtc *crtc,
> > + struct drm_crtc_state *state)
> > +{
> > + DRM_DEBUG("%s()\n", __func__);
> > +
> > + return 0;
> > +}
> > +
> > +static void sprd_crtc_atomic_begin(struct drm_crtc *crtc,
> > + struct drm_crtc_state *old_state)
> > +{
> > + struct sprd_dpu *dpu = crtc_to_dpu(crtc);
> > +
> > + memset(dpu->layers, 0, sizeof(*dpu->layers) * dpu->pending_planes);
> > +
> > + dpu->pending_planes = 0;
> > +}
> > +
> > +static void sprd_crtc_atomic_flush(struct drm_crtc *crtc,
> > + struct drm_crtc_state *old_state)
> > +
> > +{
> > + struct sprd_dpu *dpu = crtc_to_dpu(crtc);
> > + struct drm_device *drm = dpu->crtc.dev;
> > +
> > + if (dpu->pending_planes)
> > + dpu->core->flip(&dpu->ctx, dpu->layers, dpu->pending_planes);
> > +
> > + spin_lock_irq(&drm->event_lock);
> > + if (crtc->state->event) {
> > + drm_crtc_send_vblank_event(crtc, crtc->state->event);
> > + crtc->state->event = NULL;
> > + }
> > + spin_unlock_irq(&drm->event_lock);
> > +}
> > +
> > +static int sprd_crtc_enable_vblank(struct drm_crtc *crtc)
> > +{
> > + struct sprd_dpu *dpu = crtc_to_dpu(crtc);
> > +
> > + dpu->core->enable_vsync(&dpu->ctx);
> > +
> > + return 0;
> > +}
> > +
> > +static void sprd_crtc_disable_vblank(struct drm_crtc *crtc)
> > +{
> > + struct sprd_dpu *dpu = crtc_to_dpu(crtc);
> > +
> > + dpu->core->disable_vsync(&dpu->ctx);
> > +}
> > +
> > +static const struct drm_crtc_helper_funcs sprd_crtc_helper_funcs = {
> > + .mode_valid = sprd_crtc_mode_valid,
> > + .atomic_check = sprd_crtc_atomic_check,
> > + .atomic_begin = sprd_crtc_atomic_begin,
> > + .atomic_flush = sprd_crtc_atomic_flush,
> > + .atomic_enable = sprd_crtc_atomic_enable,
> > + .atomic_disable = sprd_crtc_atomic_disable,
> > +};
> > +
> > +static const struct drm_crtc_funcs sprd_crtc_funcs = {
> > + .destroy = drm_crtc_cleanup,
> > + .set_config = drm_atomic_helper_set_config,
> > + .page_flip = drm_atomic_helper_page_flip,
> > + .reset = drm_atomic_helper_crtc_reset,
> > + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
> > + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
> > + .enable_vblank = sprd_crtc_enable_vblank,
> > + .disable_vblank = sprd_crtc_disable_vblank,
> > +};
> > +
> > +static int sprd_crtc_init(struct drm_device *drm, struct drm_crtc *crtc,
> > + struct drm_plane *primary)
> > +{
> > + struct device_node *port;
> > + int ret;
> > +
> > + /*
> > + * set crtc port so that drm_of_find_possible_crtcs call works
> > + */
> > + port = of_parse_phandle(drm->dev->of_node, "ports", 0);
> > + if (!port) {
> > + DRM_ERROR("find 'ports' phandle of %s failed\n",
> > + drm->dev->of_node->full_name);
> > + return -EINVAL;
> > + }
> > + of_node_put(port);
> > + crtc->port = port;
> > +
> > + ret = drm_crtc_init_with_planes(drm, crtc, primary, NULL,
> > + &sprd_crtc_funcs, NULL);
> > + if (ret) {
> > + DRM_ERROR("failed to init crtc.\n");
> > + return ret;
> > + }
> > +
> > + drm_mode_crtc_set_gamma_size(crtc, 256);
> > +
> > + drm_crtc_helper_add(crtc, &sprd_crtc_helper_funcs);
> > +
> > + return 0;
> > +}
> > +
> > +static void sprd_dpu_init(struct sprd_dpu *dpu)
> > +{
> > + struct dpu_context *ctx = &dpu->ctx;
> > +
> > + dpu->core->init(ctx);
> > + dpu->core->ifconfig(ctx);
> > +}
> > +
> > +static void sprd_dpu_fini(struct sprd_dpu *dpu)
> > +{
> > + struct dpu_context *ctx = &dpu->ctx;
> > +
> > + dpu->core->fini(ctx);
> > +}
> > +
> > +static irqreturn_t sprd_dpu_isr(int irq, void *data)
> > +{
> > + struct sprd_dpu *dpu = data;
> > + struct dpu_context *ctx = &dpu->ctx;
> > + u32 int_mask = 0;
> > +
> > + int_mask = dpu->core->isr(ctx);
> > +
> > + if (int_mask & BIT_DPU_INT_ERR)
> > + DRM_WARN("Warning: dpu underflow!\n");
> > +
> > + if (int_mask & BIT_DPU_INT_VSYNC)
> > + drm_crtc_handle_vblank(&dpu->crtc);
> > +
> > + return IRQ_HANDLED;
> > +}
> > +
> > +static int sprd_dpu_bind(struct device *dev, struct device *master, void *data)
> > +{
> > + struct drm_device *drm = data;
> > + struct sprd_dpu *dpu = dev_get_drvdata(dev);
> > + struct drm_plane *plane;
> > + int ret;
> > +
> > + plane = sprd_plane_init(drm, dpu);
> > + if (IS_ERR_OR_NULL(plane)) {
> > + ret = PTR_ERR(plane);
> > + return ret;
> > + }
> > +
> > + ret = sprd_crtc_init(drm, &dpu->crtc, plane);
> > + if (ret)
> > + return ret;
> > +
> > + return 0;
> > +}
> > +
> > +static void sprd_dpu_unbind(struct device *dev, struct device *master,
> > + void *data)
> > +{
> > + struct sprd_dpu *dpu = dev_get_drvdata(dev);
> > +
> > + drm_crtc_cleanup(&dpu->crtc);
> > +}
> > +
> > +static const struct component_ops dpu_component_ops = {
> > + .bind = sprd_dpu_bind,
> > + .unbind = sprd_dpu_unbind,
> > +};
> > +
> > +static int sprd_dpu_context_init(struct sprd_dpu *dpu,
> > + struct device *dev)
> > +{
> > + struct platform_device *pdev = to_platform_device(dev);
> > + struct dpu_context *ctx = &dpu->ctx;
> > + struct resource *res;
> > + int ret;
> > +
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + ctx->base = devm_ioremap(dev, res->start, resource_size(res));
> > + if (!ctx->base) {
> > + DRM_ERROR("failed to map dpu registers\n");
> > + return -EFAULT;
> > + }
> > +
> > + ctx->irq = platform_get_irq(pdev, 0);
> > + if (ctx->irq < 0) {
> > + DRM_ERROR("failed to get dpu irq\n");
> > + return ctx->irq;
> > + }
> > +
> > + irq_set_status_flags(ctx->irq, IRQ_NOAUTOEN);
> > + ret = devm_request_irq(dev, ctx->irq, sprd_dpu_isr,
> > + 0, "DPU", dpu);
> > + if (ret) {
> > + DRM_ERROR("failed to register dpu irq handler\n");
> > + return ret;
> > + }
> > +
> > + init_waitqueue_head(&ctx->wait_queue);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct sprd_dpu_ops sharkl3_dpu = {
> > + .core = &dpu_r2p0_core_ops,
> > +};
> > +
> > +static const struct of_device_id dpu_match_table[] = {
> > + { .compatible = "sprd,sharkl3-dpu",
> > + .data = &sharkl3_dpu },
> > + { /* sentinel */ },
> > +};
> > +
> > +static int sprd_dpu_probe(struct platform_device *pdev)
> > +{
> > + const struct sprd_dpu_ops *pdata;
> > + struct sprd_dpu *dpu;
> > + int ret;
> > +
> > + dpu = devm_kzalloc(&pdev->dev, sizeof(*dpu), GFP_KERNEL);
> > + if (!dpu)
> > + return -ENOMEM;
> > +
> > + pdata = of_device_get_match_data(&pdev->dev);
> > + if (pdata) {
> > + dpu->core = pdata->core;
> > + } else {
> > + DRM_ERROR("No matching driver data found\n");
> > + return -EINVAL;
> > + }
> > +
> > + ret = sprd_dpu_context_init(dpu, &pdev->dev);
> > + if (ret)
> > + return ret;
> > +
> > + platform_set_drvdata(pdev, dpu);
> > +
> > + return component_add(&pdev->dev, &dpu_component_ops);
> > +}
> > +
> > +static int sprd_dpu_remove(struct platform_device *pdev)
> > +{
> > + component_del(&pdev->dev, &dpu_component_ops);
> > + return 0;
> > +}
> > +
> > +struct platform_driver sprd_dpu_driver = {
> > + .probe = sprd_dpu_probe,
> > + .remove = sprd_dpu_remove,
> > + .driver = {
> > + .name = "sprd-dpu-drv",
> > + .of_match_table = dpu_match_table,
> > + },
> > +};
> > +
> > +MODULE_AUTHOR("Leon He <leon.he@xxxxxxxxxx>");
> > +MODULE_AUTHOR("Kevin Tang <kevin.tang@xxxxxxxxxx>");
> > +MODULE_DESCRIPTION("Unisoc Display Controller Driver");
> > +MODULE_LICENSE("GPL v2");
> > diff --git a/drivers/gpu/drm/sprd/sprd_dpu.h b/drivers/gpu/drm/sprd/sprd_dpu.h
> > new file mode 100644
> > index 0000000..7d3c5e4
> > --- /dev/null
> > +++ b/drivers/gpu/drm/sprd/sprd_dpu.h
> > @@ -0,0 +1,187 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2020 Unisoc Inc.
> > + */
> > +
> > +#ifndef __SPRD_DPU_H__
> > +#define __SPRD_DPU_H__
> > +
> > +#include <linux/bug.h>
> > +#include <linux/delay.h>
> > +#include <linux/device.h>
> > +#include <linux/kernel.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/string.h>
> > +#include <video/videomode.h>
> > +
> > +#include <drm/drm_crtc.h>
> > +#include <drm/drm_fourcc.h>
> > +#include <drm/drm_print.h>
> > +#include <drm/drm_vblank.h>
> > +#include <uapi/drm/drm_mode.h>
> > +
> > +#define BIT_DPU_INT_DONE_ BIT(0)
> > +#define BIT_DPU_INT_TE BIT(1)
> > +#define BIT_DPU_INT_ERR BIT(2)
> > +#define BIT_DPU_INT_EDPI_TE BIT(3)
> > +#define BIT_DPU_INT_UPDATE_DONE BIT(4)
> > +#define BIT_DPU_INT_VSYNC BIT(5)
> > +#define BIT_DPU_INT_WB_DONE BIT(6)
> > +#define BIT_DPU_INT_WB_ERR BIT(7)
> > +
> > +#define BIT_DPU_LAY_LAYER_ALPHA (0x01 << 2)
> > +#define BIT_DPU_LAY_COMBO_ALPHA (0x02 << 2)
> > +#define BIT_DPU_LAY_FORMAT_YUV422_2PLANE (0x00 << 4)
> > +#define BIT_DPU_LAY_FORMAT_YUV420_2PLANE (0x01 << 4)
> > +#define BIT_DPU_LAY_FORMAT_YUV420_3PLANE (0x02 << 4)
> > +#define BIT_DPU_LAY_FORMAT_ARGB8888 (0x03 << 4)
> > +#define BIT_DPU_LAY_FORMAT_RGB565 (0x04 << 4)
> > +#define BIT_DPU_LAY_DATA_ENDIAN_B0B1B2B3 (0x00 << 8)
> > +#define BIT_DPU_LAY_DATA_ENDIAN_B3B2B1B0 (0x01 << 8)
> > +#define BIT_DPU_LAY_NO_SWITCH (0x00 << 10)
> > +#define BIT_DPU_LAY_RB_OR_UV_SWITCH (0x01 << 10)
> > +#define BIT_DPU_LAY_MODE_BLEND_NORMAL (0x00 << 16)
> > +#define BIT_DPU_LAY_MODE_BLEND_PREMULT (0x01 << 16)
> > +
> > +enum {
> > + SPRD_DPU_IF_DBI = 0,
> > + SPRD_DPU_IF_DPI,
> > + SPRD_DPU_IF_EDPI,
> > + SPRD_DPU_IF_LIMIT
> > +};
> > +
> > +enum {
> > + DPU_LAYER_ROTATION_0,
> > + DPU_LAYER_ROTATION_90,
> > + DPU_LAYER_ROTATION_180,
> > + DPU_LAYER_ROTATION_270,
> > + DPU_LAYER_ROTATION_0_M,
> > + DPU_LAYER_ROTATION_90_M,
> > + DPU_LAYER_ROTATION_180_M,
> > + DPU_LAYER_ROTATION_270_M,
> > +};
> > +
> > +struct dpu_layer {
> > + u8 index;
> > + u8 planes;
> > + u32 addr[4];
> > + u32 pitch[4];
> > + s16 src_x;
> > + s16 src_y;
> > + s16 src_w;
> > + s16 src_h;
> > + s16 dst_x;
> > + s16 dst_y;
> > + u16 dst_w;
> > + u16 dst_h;
> > + u32 format;
> > + u32 alpha;
> > + u32 blending;
> > + u32 rotation;
> > +};
> > +
> > +/**
> > + * Sprd DPU capability structure
> > + *
> > + * @max_layers: maximum number of layers available
> > + * @fmts_ptr: A pointer to array of supported pixel formats
> > + * @fmts_cnt: the number of format on @fmts_ptr
> > + */
> > +struct dpu_capability {
> > + u32 max_layers;
> > + const u32 *fmts_ptr;
> > + u32 fmts_cnt;
> > +};
> > +
> > +/**
> > + * Sprd DPU core callback ops
> > + *
> > + * This structure decribes the display controller common
> > + * callback ops
> > + *
> > + * @init: initial DPU core
> > + * @fini: cleanup DPU core
> > + * @run: enable DPU output
> > + * @stop: disable DPU output
> > + * @enable_vsync: enable vblank interrupt
> > + * @disable_vsync: disable vblank interrupt
> > + * @isr: function pointer to the isr
> > + * @ifconfig: initial DPI interface
> > + * @flip: commit CRTC planes to DPU
> > + * @capability: callback for DPU capabilities
> > + */
> > +struct dpu_context;
> > +struct dpu_core_ops {
> > + void (*init)(struct dpu_context *ctx);
> > + void (*fini)(struct dpu_context *ctx);
> > + void (*run)(struct dpu_context *ctx);
> > + void (*stop)(struct dpu_context *ctx);
> > + void (*enable_vsync)(struct dpu_context *ctx);
> > + void (*disable_vsync)(struct dpu_context *ctx);
> > + u32 (*isr)(struct dpu_context *ctx);
> > + void (*ifconfig)(struct dpu_context *ctx);
> > + void (*flip)(struct dpu_context *ctx,
> > + struct dpu_layer layers[], u8 count);
> > + void (*capability)(struct dpu_context *ctx,
> > + struct dpu_capability *cap);
> > +};
> > +
> > +/**
> > + * Sprd DPU context structure
> > + *
> > + * @base: DPU controller base address
> > + * @irq: IRQ number to install the handler for
> > + * @if_type: The type of DPI interface, default is DPI mode.
> > + * @vm: videomode structure to use for DPU and DPI initialization
> > + * @stopped: indicates whether DPU are stopped
> > + * @wait_queue: wait queue, used to wait for DPU shadow register update done and
> > + * DPU stop register done interrupt signal.
> > + * @evt_update: wait queue condition for DPU shadow register
> > + * @evt_stop: wait queue condition for DPU stop register
> > + */
> > +struct dpu_context {
> > + void __iomem *base;
> > + int irq;
> > + u8 if_type;
> > + struct videomode vm;
> > + bool stopped;
> > + wait_queue_head_t wait_queue;
> > + bool evt_update;
> > + bool evt_stop;
> > +};
> > +
> > +/**
> > + * Sprd DPU device structure
> > + *
> > + * @crtc: DRM crtc
> > + * @ctx: A pointer to the DPU's implementation specific context
> > + * @core: pointer to callbacks for DPU core functionality
> > + * @layers: active DPU layers ready to commit
> > + * @pending_planes: the number of layers on @layers
> > + */
> > +struct sprd_dpu {
> > + struct drm_crtc crtc;
> > + struct dpu_context ctx;
> > + const struct dpu_core_ops *core;
> > + struct dpu_layer *layers;
> > + u8 pending_planes;
> > +};
> > +
> > +/**
> > + * Sprd DPU H/W callback ops match table structure
> > + * The structure used for matching a specific device callback ops
> > + *
> > + * @core: pointer to callbacks for DPU core functionality
> > + */
> > +struct sprd_dpu_ops {
> > + const struct dpu_core_ops *core;
> > +};
> > +
> > +static inline struct sprd_dpu *crtc_to_dpu(struct drm_crtc *crtc)
> > +{
> > + return crtc ? container_of(crtc, struct sprd_dpu, crtc) : NULL;
> > +}
> > +
> > +extern const struct dpu_core_ops dpu_r2p0_core_ops;
> > +
> > +#endif
> > diff --git a/drivers/gpu/drm/sprd/sprd_drm.c b/drivers/gpu/drm/sprd/sprd_drm.c
> > index 4706185..200020f 100644
> > --- a/drivers/gpu/drm/sprd/sprd_drm.c
> > +++ b/drivers/gpu/drm/sprd/sprd_drm.c
> > @@ -200,6 +200,7 @@ static struct platform_driver sprd_drm_driver = {
> >
> > static struct platform_driver *sprd_drm_drivers[] = {
> > &sprd_drm_driver,
> > + &sprd_dpu_driver,
> > };
> >
> > static int __init sprd_drm_init(void)
> > diff --git a/drivers/gpu/drm/sprd/sprd_drm.h b/drivers/gpu/drm/sprd/sprd_drm.h
> > index edf0881..3c32f3a 100644
> > --- a/drivers/gpu/drm/sprd/sprd_drm.h
> > +++ b/drivers/gpu/drm/sprd/sprd_drm.h
> > @@ -13,4 +13,6 @@ struct sprd_drm {
> > struct drm_device *drm;
> > };
> >
> > +extern struct platform_driver sprd_dpu_driver;
> > +
> > #endif /* _SPRD_DRM_H_ */
> > --
> > 2.7.4
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel

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