Re: [PATCH 5/8] drm/imx: Introduce i.MX8qxp DPU DRM

From: Laurentiu Palcu
Date: Mon Nov 23 2020 - 08:24:54 EST

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Hi Liu Ying,

On Mon, Nov 23, 2020 at 10:45:38AM +0800, Liu Ying wrote:
> Hi Laurentiu,
>
> On Fri, 2020-11-20 at 16:38 +0200, Laurentiu Palcu wrote:
> > Hi Liu Ying,
> >
> > I gave this a first look but, since this is a huge piece of code and I'm not
> > very familiar with DPU, I'll probably give it another pass next week.
> >
> > Anyway, some comments/questions inline.
> >
> > On Thu, Nov 19, 2020 at 11:22:22AM +0200, Liu Ying wrote:
> > > This patch introduces i.MX8qxp Display Processing Unit(DPU) DRM support.
> > >
> > > DPU is comprised of two main components that include a blit engine for
> > > 2D graphics accelerations(with composition support) and a display controller
> > > for display output processing, as well as a command sequencer. Outside of
> > > DPU, optional prefetch engines, a.k.a, Prefetch Resolve Gasket(PRG) and
> > > Display Prefetch Resolve(DPR), can fetch data from memory prior to some DPU
> > > fetchunits of blit engine and display controller. The prefetch engines
> > > support reading linear formats and resolving Vivante GPU tile formats.
> > >
> > > This patch adds kernel modesetting support for the display controller part.
> > > The driver supports two CRTCs per display controller, planes backed by
> > > four fetchunits(decode0/1, fetchlayer, fetchwarp), fetchunit allocation
> > > logic for the two CRTCs, prefetch engines(with tile resolving supported),
> > > plane upscaling/deinterlacing/yuv2rgb CSC/alpha blending and CRTC gamma
> > > correction. The registers of the controller is accessed without command
> > > sequencer involved, instead just by using CPU.
> >
> > Will you also add support for command sequencer in the future? The command
> > sequencer seems to have the same purpose as the DCSS context loader on iMX8MQ,
> > which is very useful for configuring the various DC blocks right in the
> > blanking period without having to worry about synchronization. Why not use it
> > from the very beginning?
>
> The single command sequencer(cmdseq) per DPU supports
> NOP/CALL/RET/WRITE/COPY/CCOPY/SYNC instructions.
>
> It is designed to autonomously process command lists.
>
> Two reasons for not using cmdseq for display controller(kms):
>
> 1) performance consideration:
>
> The SYNC instruction stops processing the subsequent command list until
> one specific hardware event of the DPU is triggered, like shadow loaded
> event, ComCtrl_SW0(cmdseq sequence complete event), etc. To use the
> autonomous command list processing, we would queue command blocks to a
> chain. The command blocks are usually comprised of some initial WRITE
> instructions and a final SYNC instruction(to make sure the WRITE
> instructions take effect). The command blocks could be for blit engine
> or display controller. As blit engine and display controller
> operations are naturally async, those SYNC instructions would impact
> the blit and display performance. Even the two display pipelines(two
> CRTCs) of DPU themselves could impact each other's performance, because
> there could be parallel atomic commits for the two pipelines.
>
> 2) no cmdseq read instructions:
>
> The KMS driver for the display controller needs to read DPU registers
> to report CRTC scannout position, vlbank count and CRC data(DPU
> Signature units). Also, it needs to read DPU registers to sync some
> events(like FrameGen counter moving). Inserting CPU read operations
> into command sequence would pollute the pure cmdseq programming model.
>
>
> In general, cmdseq is probably better to be reserved for blit engine,
> since I assume blit engine, as a 2D engine, usually doesn't need
> reading registers. Also, blit performance would be good.

Thanks for clarifying this.

>
> >
> > > Reference manual can be found at:
> > > https://www.nxp.com/webapp/Download?colCode=IMX8DQXPRM
> > >
> > > Signed-off-by: Liu Ying <victor.liu@xxxxxxx>
> > > ---
> >
> > [...]
> >
> > > diff --git a/drivers/gpu/drm/imx/dpu/dpu-core.c b/drivers/gpu/drm/imx/dpu/dpu-core.c
> > > new file mode 100644
> > > index 00000000..1583c7a
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/imx/dpu/dpu-core.c
> > > @@ -0,0 +1,880 @@
> > > +// SPDX-License-Identifier: GPL-2.0+
> > > +
> > > +/*
> > > + * Copyright (C) 2016 Freescale Semiconductor, Inc.
> > > + * Copyright 2017-2020 NXP
> > > + */
> > > +
> > > +#include <linux/dma-mapping.h>
> > > +#include <linux/io.h>
> > > +#include <linux/irq.h>
> > > +#include <linux/irqchip/chained_irq.h>
> > > +#include <linux/module.h>
> > > +#include <linux/of_device.h>
> > > +#include <linux/of_graph.h>
> > > +#include <linux/platform_device.h>
> > > +#include <linux/pm_domain.h>
> > > +#include <linux/pm_runtime.h>
> > > +#include <linux/sizes.h>
> > > +
> > > +#include "dpu.h"
> > > +#include "dpu-prv.h"
> > > +
> > > +static inline u32 dpu_comctrl_read(struct dpu_soc *dpu, unsigned int offset)
> > > +{
> > > + return readl(dpu->comctrl_reg + offset);
> > > +}
> > > +
> > > +static inline void dpu_comctrl_write(struct dpu_soc *dpu,
> > > + unsigned int offset, u32 value)
> > > +{
> > > + writel(value, dpu->comctrl_reg + offset);
> > > +}
> > > +
> > > +/* Constant Frame */
> > > +static const unsigned int cf_ids[] = {0, 1, 4, 5};
> > > +static const enum dpu_unit_type cf_types[] = {DPU_DISP, DPU_DISP,
> > > + DPU_DISP, DPU_DISP};
> > > +static const unsigned long cf_ofss[] = {0x4400, 0x5400, 0x4c00, 0x5c00};
> > > +static const unsigned long cf_pec_ofss[] = {0x960, 0x9e0, 0x9a0, 0xa20};
> > > +
> > > +/* Display Engine Configuration */
> > > +static const unsigned int dec_ids[] = {0, 1};
> > > +static const enum dpu_unit_type dec_types[] = {DPU_DISP, DPU_DISP};
> > > +static const unsigned long dec_ofss[] = {0xb400, 0xb420};
> > > +
> > > +/* External Destination */
> > > +static const unsigned int ed_ids[] = {0, 1, 4, 5};
> > > +static const enum dpu_unit_type ed_types[] = {DPU_DISP, DPU_DISP,
> > > + DPU_DISP, DPU_DISP};
> > > +static const unsigned long ed_ofss[] = {0x4800, 0x5800, 0x5000, 0x6000};
> > > +static const unsigned long ed_pec_ofss[] = {0x980, 0xa00, 0x9c0, 0xa40};
> > > +
> > > +/* Fetch Decode */
> > > +static const unsigned int fd_ids[] = {0, 1, 9};
> > > +static const enum dpu_unit_type fd_types[] = {DPU_DISP, DPU_DISP, DPU_BLIT};
> > > +static const unsigned long fd_ofss[] = {0x6c00, 0x7800, 0x1000};
> > > +static const unsigned long fd_pec_ofss[] = {0xa80, 0xaa0, 0x820};
> > > +
> > > +/* Fetch ECO */
> > > +static const unsigned int fe_ids[] = {0, 1, 2, 9};
> > > +static const enum dpu_unit_type fe_types[] = {DPU_DISP, DPU_DISP,
> > > + DPU_DISP, DPU_BLIT};
> > > +static const unsigned long fe_ofss[] = {0x7400, 0x8000, 0x6800, 0x1c00};
> > > +static const unsigned long fe_pec_ofss[] = {0xa90, 0xab0, 0xa70, 0x850};
> > > +
> > > +/* Frame Generator */
> > > +static const unsigned int fg_ids[] = {0, 1};
> > > +static const enum dpu_unit_type fg_types[] = {DPU_DISP, DPU_DISP};
> > > +static const unsigned long fg_ofss[] = {0xb800, 0xd400};
> > > +
> > > +/* Fetch Layer */
> > > +static const unsigned int fl_ids[] = {0};
> > > +static const enum dpu_unit_type fl_types[] = {DPU_DISP};
> > > +static const unsigned long fl_ofss[] = {0x8400};
> > > +static const unsigned long fl_pec_ofss[] = {0xac0};
> > > +
> > > +/* Fetch Warp */
> > > +static const unsigned int fw_ids[] = {2, 9};
> > > +static const enum dpu_unit_type fw_types[] = {DPU_DISP, DPU_BLIT};
> > > +static const unsigned long fw_ofss[] = {0x6400, 0x1800};
> > > +static const unsigned long fw_pec_ofss[] = {0xa60, 0x840};
> > > +
> > > +/* Gamma Correction */
> > > +static const unsigned int gc_ids[] = {0, 1};
> > > +static const enum dpu_unit_type gc_types[] = {DPU_DISP, DPU_DISP};
> > > +static const unsigned long gc_ofss[] = {0xc000, 0xdc00};
> > > +
> > > +/* Horizontal Scaler */
> > > +static const unsigned int hs_ids[] = {4, 5, 9};
> > > +static const enum dpu_unit_type hs_types[] = {DPU_DISP, DPU_DISP, DPU_BLIT};
> > > +static const unsigned long hs_ofss[] = {0x9000, 0x9c00, 0x3000};
> > > +static const unsigned long hs_pec_ofss[] = {0xb00, 0xb60, 0x8c0};
> > > +
> > > +/* Layer Blend */
> > > +static const unsigned int lb_ids[] = {0, 1, 2, 3};
> > > +static const enum dpu_unit_type lb_types[] = {DPU_DISP, DPU_DISP,
> > > + DPU_DISP, DPU_DISP};
> > > +static const unsigned long lb_ofss[] = {0xa400, 0xa800, 0xac00, 0xb000};
> > > +static const unsigned long lb_pec_ofss[] = {0xba0, 0xbc0, 0xbe0, 0xc00};
> > > +
> > > +/* Timing Controller */
> > > +static const unsigned int tcon_ids[] = {0, 1};
> > > +static const enum dpu_unit_type tcon_types[] = {DPU_DISP, DPU_DISP};
> > > +static const unsigned long tcon_ofss[] = {0xc800, 0xe400};
> > > +
> > > +/* Vertical Scaler */
> > > +static const unsigned int vs_ids[] = {4, 5, 9};
> > > +static const enum dpu_unit_type vs_types[] = {DPU_DISP, DPU_DISP, DPU_BLIT};
> > > +static const unsigned long vs_ofss[] = {0x9400, 0xa000, 0x3400};
> > > +static const unsigned long vs_pec_ofss[] = {0xb20, 0xb80, 0x8e0};
> > > +
> > > +#define DPU_UNITS_DEFINE(unit) \
> > > +static const struct dpu_units dpu_##unit##s = { \
> > > + .ids = unit##_ids, \
> > > + .types = unit##_types, \
> > > + .ofss = unit##_ofss, \
> > > + .pec_ofss = unit##_pec_ofss, \
> > > + .cnt = ARRAY_SIZE(unit##_ids), \
> > > +}
> > > +
> > > +/* units without Pixel Engine Configuration */
> > > +#define DPU_UNITS_DEFINE_NO_PEC(unit) \
> > > +static const struct dpu_units dpu_##unit##s = { \
> > > + .ids = unit##_ids, \
> > > + .types = unit##_types, \
> > > + .ofss = unit##_ofss, \
> > > + .pec_ofss = NULL, \
> > > + .cnt = ARRAY_SIZE(unit##_ids), \
> > > +}
> > > +
> > > +DPU_UNITS_DEFINE(cf);
> > > +DPU_UNITS_DEFINE_NO_PEC(dec);
> > > +DPU_UNITS_DEFINE(ed);
> > > +DPU_UNITS_DEFINE(fd);
> > > +DPU_UNITS_DEFINE(fe);
> > > +DPU_UNITS_DEFINE_NO_PEC(fg);
> > > +DPU_UNITS_DEFINE(fl);
> > > +DPU_UNITS_DEFINE(fw);
> > > +DPU_UNITS_DEFINE_NO_PEC(gc);
> > > +DPU_UNITS_DEFINE(hs);
> > > +DPU_UNITS_DEFINE(lb);
> > > +DPU_UNITS_DEFINE_NO_PEC(tcon);
> > > +DPU_UNITS_DEFINE(vs);
> > > +
> > > +static void dpu_detach_pm_domains(struct dpu_soc *dpu)
> > > +{
> > > +#define DPU_DETACH_PM_DOMAIN(name) \
> > > +do { \
> > > + if (!IS_ERR_OR_NULL(dpu->pd_##name##_link)) \
> > > + device_link_del(dpu->pd_##name##_link); \
> > > + if (!IS_ERR_OR_NULL(dpu->pd_##name##_dev)) \
> > > + dev_pm_domain_detach(dpu->pd_##name##_dev, true); \
> > > + \
> > > + dpu->pd_##name##_dev = NULL; \
> > > + dpu->pd_##name##_link = NULL; \
> > > +} while (0)
> > > +
> > > + DPU_DETACH_PM_DOMAIN(pll1);
> > > + DPU_DETACH_PM_DOMAIN(pll0);
> > > + DPU_DETACH_PM_DOMAIN(dc);
> > > +}
> > > +
> > > +static int dpu_attach_pm_domains(struct dpu_soc *dpu)
> > > +{
> > > + u32 flags = DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE;
> > > + int ret = 0;
> > > +
> > > +#define DPU_ATTACH_PM_DOMAIN(name) \
> > > +do { \
> > > + dpu->pd_##name##_dev = \
> > > + dev_pm_domain_attach_by_name(dpu->dev, "" #name ""); \
> > > + if (IS_ERR(dpu->pd_##name##_dev)) { \
> > > + ret = PTR_ERR(dpu->pd_##name##_dev); \
> > > + dev_err(dpu->dev, \
> > > + "failed to attach " #name " pd dev: %d\n", ret);\
> > > + goto fail; \
> > > + } \
> > > + \
> > > + dpu->pd_##name##_link = \
> > > + device_link_add(dpu->dev, dpu->pd_##name##_dev, flags); \
> > > + if (IS_ERR(dpu->pd_##name##_link)) { \
> > > + ret = PTR_ERR(dpu->pd_##name##_link); \
> > > + dev_err(dpu->dev, \
> > > + "failed to add device link to " #name \
> > > + " pd dev: %d\n", ret); \
> > > + goto fail; \
> > > + } \
> > > +} while (0)
> > > +
> > > + DPU_ATTACH_PM_DOMAIN(dc);
> > > + DPU_ATTACH_PM_DOMAIN(pll0);
> > > + DPU_ATTACH_PM_DOMAIN(pll1);
> > > +
> > > + return ret;
> > > +fail:
> > > + dpu_detach_pm_domains(dpu);
> > > + return ret;
> > > +}
> > > +
> > > +static void dpu_units_addr_dbg(struct dpu_soc *dpu, unsigned long dpu_base)
> > > +{
> > > + int i;
> > > +
> > > + dev_dbg(dpu->dev, "Common Control: 0x%08lx\n", dpu_base);
> > > +
> > > +#define DPU_UNITS_ADDR_DBG(unit) \
> > > +do { \
> > > + const struct dpu_units *us = &dpu_##unit##s; \
> > > + \
> > > + for (i = 0; i < us->cnt; i++) { \
> > > + if (us->pec_ofss) { \
> > > + dev_dbg(dpu->dev, "%s%d: pixengcfg @ 0x%08lx," \
> > > + " unit @ 0x%08lx\n", #unit, \
> > > + us->ids[i], \
> > > + dpu_base + us->pec_ofss[i], \
> > > + dpu_base + us->ofss[i]); \
> > > + } else { \
> > > + dev_dbg(dpu->dev, \
> > > + "%s%d: unit @ 0x%08lx\n", #unit, \
> > > + us->ids[i], dpu_base + us->ofss[i]); \
> > > + } \
> > > + } \
> > > +} while (0)
> > > +
> > > + DPU_UNITS_ADDR_DBG(cf);
> > > + DPU_UNITS_ADDR_DBG(dec);
> > > + DPU_UNITS_ADDR_DBG(ed);
> > > + DPU_UNITS_ADDR_DBG(fd);
> > > + DPU_UNITS_ADDR_DBG(fe);
> > > + DPU_UNITS_ADDR_DBG(fg);
> > > + DPU_UNITS_ADDR_DBG(fl);
> > > + DPU_UNITS_ADDR_DBG(fw);
> > > + DPU_UNITS_ADDR_DBG(gc);
> > > + DPU_UNITS_ADDR_DBG(hs);
> > > + DPU_UNITS_ADDR_DBG(lb);
> > > + DPU_UNITS_ADDR_DBG(tcon);
> > > + DPU_UNITS_ADDR_DBG(vs);
> > > +}
> > > +
> > > +static int dpu_get_irq(struct platform_device *pdev, struct dpu_soc *dpu)
> > > +{
> > > +#define DPU_GET_IRQ(name) \
> > > +do { \
> > > + dpu->irq_##name = platform_get_irq_byname(pdev, "" #name ""); \
> > > + dev_dbg(dpu->dev, "get irq_" #name ": %d\n", dpu->irq_##name); \
> > > + if (dpu->irq_##name < 0) { \
> > > + dev_err_probe(dpu->dev, dpu->irq_##name, \
> > > + "failed to get irq " #name "\n"); \
> > > + return dpu->irq_##name; \
> > > + } \
> > > +} while (0)
> > > +
> > > + DPU_GET_IRQ(disengcfg_framecomplete0);
> > > + DPU_GET_IRQ(disengcfg_seqcomplete0);
> > > + DPU_GET_IRQ(disengcfg_shdload0);
> > > + DPU_GET_IRQ(disengcfg_framecomplete1);
> > > + DPU_GET_IRQ(disengcfg_seqcomplete1);
> > > + DPU_GET_IRQ(disengcfg_shdload1);
> > > + DPU_GET_IRQ(extdst0_shdload);
> > > + DPU_GET_IRQ(extdst1_shdload);
> > > + DPU_GET_IRQ(extdst4_shdload);
> > > + DPU_GET_IRQ(extdst5_shdload);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void dpu_irq_handle(struct irq_desc *desc, enum dpu_irq irq)
> > > +{
> > > + struct dpu_soc *dpu = irq_desc_get_handler_data(desc);
> > > + struct irq_chip *chip = irq_desc_get_chip(desc);
> > > + unsigned int virq;
> > > + u32 status;
> > > +
> > > + chained_irq_enter(chip, desc);
> > > +
> > > + status = dpu_comctrl_read(dpu, USERINTERRUPTSTATUS(irq / 32));
> > > + status &= dpu_comctrl_read(dpu, USERINTERRUPTENABLE(irq / 32));
> > > +
> > > + if (status & BIT(irq % 32)) {
> > > + virq = irq_linear_revmap(dpu->domain, irq);
> > > + if (virq)
> > > + generic_handle_irq(virq);
> > > + }
> > > +
> > > + chained_irq_exit(chip, desc);
> > > +}
> > > +
> > > +#define DPU_IRQ_DISENGCFG_FRAMECOMPLETE_HANDLER_DEFINE(id) \
> > > +static void \
> > > +dpu_disengcfg_framecomplete##id##_irq_handler(struct irq_desc *desc) \
> > > +{ \
> > > + dpu_irq_handle(desc, DPU_IRQ_DISENGCFG_FRAMECOMPLETE##id); \
> > > +}
> > > +
> > > +#define DPU_IRQ_DISENGCFG_SEQCOMPLETE_HANDLER_DEFINE(id) \
> > > +static void \
> > > +dpu_disengcfg_seqcomplete##id##_irq_handler(struct irq_desc *desc) \
> > > +{ \
> > > + dpu_irq_handle(desc, DPU_IRQ_DISENGCFG_SEQCOMPLETE##id); \
> > > +}
> > > +
> > > +#define DPU_IRQ_DISENGCFG_SHDLOAD_HANDLER_DEFINE(id) \
> > > +static void \
> > > +dpu_disengcfg_shdload##id##_irq_handler(struct irq_desc *desc) \
> > > +{ \
> > > + dpu_irq_handle(desc, DPU_IRQ_DISENGCFG_SHDLOAD##id); \
> > > +}
> > > +
> > > +#define DPU_IRQ_EXTDST_SHDLOAD_HANDLER_DEFINE(id) \
> > > +static void \
> > > +dpu_extdst##id##_shdload_irq_handler(struct irq_desc *desc) \
> > > +{ \
> > > + dpu_irq_handle(desc, DPU_IRQ_EXTDST##id##_SHDLOAD); \
> > > +}
> > > +
> > > +DPU_IRQ_DISENGCFG_FRAMECOMPLETE_HANDLER_DEFINE(0)
> > > +DPU_IRQ_DISENGCFG_FRAMECOMPLETE_HANDLER_DEFINE(1)
> > > +
> > > +DPU_IRQ_DISENGCFG_SEQCOMPLETE_HANDLER_DEFINE(0)
> > > +DPU_IRQ_DISENGCFG_SEQCOMPLETE_HANDLER_DEFINE(1)
> > > +
> > > +DPU_IRQ_DISENGCFG_SHDLOAD_HANDLER_DEFINE(0)
> > > +DPU_IRQ_DISENGCFG_SHDLOAD_HANDLER_DEFINE(1)
> > > +
> > > +DPU_IRQ_EXTDST_SHDLOAD_HANDLER_DEFINE(0)
> > > +DPU_IRQ_EXTDST_SHDLOAD_HANDLER_DEFINE(1)
> > > +DPU_IRQ_EXTDST_SHDLOAD_HANDLER_DEFINE(4)
> > > +DPU_IRQ_EXTDST_SHDLOAD_HANDLER_DEFINE(5)
> > > +
> > > +int dpu_map_irq(struct dpu_soc *dpu, int irq)
> > > +{
> > > + int virq = irq_linear_revmap(dpu->domain, irq);
> > > +
> > > + if (!virq)
> > > + virq = irq_create_mapping(dpu->domain, irq);
> > > +
> > > + return virq;
> > > +}
> > > +
> > > +static const unsigned long unused_irq[2] = {0x00000000, 0xfffe0008};
> > > +
> > > +static void dpu_irq_hw_init(struct dpu_soc *dpu)
> > > +{
> > > + int i;
> > > +
> > > + for (i = 0; i < DPU_IRQ_COUNT; i += 32) {
> > > + /* mask and clear all interrupts */
> > > + dpu_comctrl_write(dpu, USERINTERRUPTENABLE(i / 32), 0);
> > > + dpu_comctrl_write(dpu, USERINTERRUPTCLEAR(i / 32),
> > > + ~unused_irq[i / 32]);
> > > + dpu_comctrl_write(dpu, INTERRUPTENABLE(i / 32), 0);
> > > + dpu_comctrl_write(dpu, INTERRUPTCLEAR(i / 32),
> > > + ~unused_irq[i / 32]);
> > > +
> > > + /* set all interrupts to user mode */
> > > + dpu_comctrl_write(dpu, USERINTERRUPTMASK(i / 32),
> > > + ~unused_irq[i / 32]);
> > > + }
> > > +}
> > > +
> > > +static int dpu_irq_init(struct dpu_soc *dpu)
> > > +{
> > > + struct device *dev = dpu->dev;
> > > + struct irq_chip_generic *gc;
> > > + struct irq_chip_type *ct;
> > > + int ret, i;
> > > +
> > > + dpu->domain = irq_domain_add_linear(dev->of_node, DPU_IRQ_COUNT,
> > > + &irq_generic_chip_ops, dpu);
> > > + if (!dpu->domain) {
> > > + dev_err(dev, "failed to add irq domain\n");
> > > + return -ENODEV;
> > > + }
> > > +
> > > + ret = irq_alloc_domain_generic_chips(dpu->domain, 32, 1, "DPU",
> > > + handle_level_irq, 0, 0, 0);
> > > + if (ret) {
> > > + dev_err(dev, "failed to alloc generic irq chips: %d\n", ret);
> > > + irq_domain_remove(dpu->domain);
> > > + return ret;
> > > + }
> > > +
> > > + for (i = 0; i < DPU_IRQ_COUNT; i += 32) {
> > > + gc = irq_get_domain_generic_chip(dpu->domain, i);
> > > + gc->reg_base = dpu->comctrl_reg;
> > > + gc->unused = unused_irq[i / 32];
> > > + ct = gc->chip_types;
> > > + ct->chip.irq_ack = irq_gc_ack_set_bit;
> > > + ct->chip.irq_mask = irq_gc_mask_clr_bit;
> > > + ct->chip.irq_unmask = irq_gc_mask_set_bit;
> > > + ct->regs.ack = USERINTERRUPTCLEAR(i / 32);
> > > + ct->regs.mask = USERINTERRUPTENABLE(i / 32);
> > > + }
> > > +
> > > +#define DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(name) \
> > > +irq_set_chained_handler_and_data(dpu->irq_##name, dpu_##name##_irq_handler, dpu)
> > > +
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(disengcfg_framecomplete0);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(disengcfg_seqcomplete0);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(disengcfg_shdload0);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(disengcfg_framecomplete1);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(disengcfg_seqcomplete1);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(disengcfg_shdload1);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(extdst0_shdload);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(extdst1_shdload);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(extdst4_shdload);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA1(extdst5_shdload);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void dpu_irq_exit(struct dpu_soc *dpu)
> > > +{
> > > + unsigned int i, irq;
> > > +
> > > +#define DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(name) \
> > > +irq_set_chained_handler_and_data(dpu->irq_##name, NULL, NULL)
> > > +
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(disengcfg_framecomplete0);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(disengcfg_seqcomplete0);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(disengcfg_shdload0);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(disengcfg_framecomplete1);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(disengcfg_seqcomplete1);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(disengcfg_shdload1);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(extdst0_shdload);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(extdst1_shdload);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(extdst4_shdload);
> > > + DPU_IRQ_SET_CHAINED_HANDLER_AND_DATA2(extdst5_shdload);
> > > +
> > > + for (i = 0; i < DPU_IRQ_COUNT; i++) {
> > > + irq = irq_linear_revmap(dpu->domain, i);
> > > + if (irq)
> > > + irq_dispose_mapping(irq);
> > > + }
> > > +
> > > + irq_domain_remove(dpu->domain);
> > > +}
> > > +
> > > +static void dpu_submodules_hw_init(struct dpu_soc *dpu)
> > > +{
> > > +#define DPU_UNITS_HW_INIT(unit) \
> > > +do { \
> > > + const struct dpu_units *us = &dpu_##unit##s; \
> > > + int i; \
> > > + \
> > > + for (i = 0; i < us->cnt; i++) \
> > > + dpu_##unit##_hw_init(dpu, i); \
> > > +} while (0)
> > > +
> > > + DPU_UNITS_HW_INIT(cf);
> > > + DPU_UNITS_HW_INIT(dec);
> > > + DPU_UNITS_HW_INIT(ed);
> > > + DPU_UNITS_HW_INIT(fd);
> > > + DPU_UNITS_HW_INIT(fe);
> > > + DPU_UNITS_HW_INIT(fg);
> > > + DPU_UNITS_HW_INIT(fl);
> > > + DPU_UNITS_HW_INIT(fw);
> > > + DPU_UNITS_HW_INIT(gc);
> > > + DPU_UNITS_HW_INIT(hs);
> > > + DPU_UNITS_HW_INIT(lb);
> > > + DPU_UNITS_HW_INIT(tcon);
> > > + DPU_UNITS_HW_INIT(vs);
> > > +}
> > > +
> > > +static int dpu_submodules_init(struct dpu_soc *dpu, unsigned long dpu_base)
> > > +{
> > > + int ret, i;
> > > +
> > > +#define DPU_UNIT_INIT(unit, base, index, id, type, pec_ofs, ofs) \
> > > +do { \
> > > + ret = dpu_##unit##_init(dpu, (index), (id), (type), \
> > > + (pec_ofs) ? (base) + (pec_ofs) : 0, \
> > > + (base) + (ofs)); \
> > > + if (ret) { \
> > > + dev_err(dpu->dev, "failed to initialize %s%d: %d\n", \
> > > + #unit, (id), ret); \
> > > + return ret; \
> > > + } \
> > > +} while (0)
> > > +
> > > +#define DPU_UNITS_INIT(unit) \
> > > +do { \
> > > + const struct dpu_units *us = &dpu_##unit##s; \
> > > + \
> > > + for (i = 0; i < us->cnt; i++) \
> > > + DPU_UNIT_INIT(unit, dpu_base, i, \
> > > + us->ids[i], us->types[i], \
> > > + us->pec_ofss ? us->pec_ofss[i] : 0, \
> > > + us->ofss[i]); \
> > > +} while (0)
> > > +
> > > + DPU_UNITS_INIT(cf);
> > > + DPU_UNITS_INIT(dec);
> > > + DPU_UNITS_INIT(ed);
> > > + DPU_UNITS_INIT(fd);
> > > + DPU_UNITS_INIT(fe);
> > > + DPU_UNITS_INIT(fg);
> > > + DPU_UNITS_INIT(fl);
> > > + DPU_UNITS_INIT(fw);
> > > + DPU_UNITS_INIT(gc);
> > > + DPU_UNITS_INIT(hs);
> > > + DPU_UNITS_INIT(lb);
> > > + DPU_UNITS_INIT(tcon);
> > > + DPU_UNITS_INIT(vs);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int platform_remove_devices_fn(struct device *dev, void *unused)
> > > +{
> > > + struct platform_device *pdev = to_platform_device(dev);
> > > +
> > > + platform_device_unregister(pdev);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void platform_device_unregister_children(struct platform_device *pdev)
> > > +{
> > > + device_for_each_child(&pdev->dev, NULL, platform_remove_devices_fn);
> > > +}
> > > +
> > > +struct dpu_platform_reg {
> > > + struct dpu_client_platformdata pdata;
> > > + const char *name;
> > > +};
> > > +
> > > +static struct dpu_platform_reg client_reg[] = {
> > > + {
> > > + .pdata = {
> > > + .stream_id = 0,
> > > + .dec_frame_complete_irq = DPU_IRQ_DISENGCFG_FRAMECOMPLETE0,
> > > + .dec_seq_complete_irq = DPU_IRQ_DISENGCFG_SEQCOMPLETE0,
> > > + .dec_shdld_irq = DPU_IRQ_DISENGCFG_SHDLOAD0,
> > > + .ed_cont_shdld_irq = DPU_IRQ_EXTDST0_SHDLOAD,
> > > + .ed_safe_shdld_irq = DPU_IRQ_EXTDST4_SHDLOAD,
> > > + },
> > > + .name = "imx-dpu-crtc",
> > > + }, {
> > > + .pdata = {
> > > + .stream_id = 1,
> > > + .dec_frame_complete_irq = DPU_IRQ_DISENGCFG_FRAMECOMPLETE1,
> > > + .dec_seq_complete_irq = DPU_IRQ_DISENGCFG_SEQCOMPLETE1,
> > > + .dec_shdld_irq = DPU_IRQ_DISENGCFG_SHDLOAD1,
> > > + .ed_cont_shdld_irq = DPU_IRQ_EXTDST1_SHDLOAD,
> > > + .ed_safe_shdld_irq = DPU_IRQ_EXTDST5_SHDLOAD,
> > > + },
> > > + .name = "imx-dpu-crtc",
> > > + }
> > > +};
> > > +
> > > +static DEFINE_MUTEX(dpu_client_id_mutex);
> > > +static int dpu_client_id;
> > > +
> > > +static int dpu_get_plane_grp_res(struct dpu_soc *dpu,
> > > + struct dpu_plane_grp *grp)
> > > +{
> > > + struct dpu_plane_res *res = &grp->res;
> > > + int i, j;
> > > + int ret = 0;
> > > +
> > > + INIT_LIST_HEAD(&grp->fu_list);
> > > +
> > > +#define DPU_UNITS_GET_FOR_PLANE_GRP(unit) \
> > > +do { \
> > > + for (i = 0; i < ARRAY_SIZE(unit##_ids); i++) { \
> > > + if (unit##_types[i] == DPU_DISP) \
> > > + res->unit##_cnt++; \
> > > + } \
> > > + \
> > > + res->unit = devm_kcalloc(dpu->dev, res->unit##_cnt, \
> > > + sizeof(*res->unit), GFP_KERNEL); \
> > > + if (!res->unit) \
> > > + return -ENOMEM; \
> > > + \
> > > + for (i = 0, j = 0; i < ARRAY_SIZE(unit##_ids); i++) { \
> > > + if (unit##_types[i] != DPU_DISP) \
> > > + continue; \
> > > + \
> > > + res->unit[j] = dpu_##unit##_get(dpu, unit##_ids[i]); \
> > > + if (IS_ERR(res->unit[j])) { \
> > > + ret = PTR_ERR(res->unit[j]); \
> > > + dev_err(dpu->dev, \
> > > + "failed to get %s%d: %d\n", \
> > > + #unit, unit##_ids[i], ret); \
> > > + return ret; \
> > > + } \
> > > + j++; \
> > > + } \
> > > +} while (0)
> > > +
> > > + DPU_UNITS_GET_FOR_PLANE_GRP(fd);
> > > + DPU_UNITS_GET_FOR_PLANE_GRP(fl);
> > > + DPU_UNITS_GET_FOR_PLANE_GRP(fw);
> > > + DPU_UNITS_GET_FOR_PLANE_GRP(lb);
> > > +
> > > +#define DPU_FETCHUNIT_ADD_TO_PLANE_GRP_LIST(unit) \
> > > +do { \
> > > + for (i = res->unit##_cnt - 1; i >= 0; i--) \
> > > + dpu_fu_add_to_list(res->unit[i], &grp->fu_list); \
> > > +} while (0)
> > > +
> > > + DPU_FETCHUNIT_ADD_TO_PLANE_GRP_LIST(fd);
> > > + DPU_FETCHUNIT_ADD_TO_PLANE_GRP_LIST(fw);
> > > + DPU_FETCHUNIT_ADD_TO_PLANE_GRP_LIST(fl);
> > > +
> > > + grp->hw_plane_cnt = res->fd_cnt + res->fl_cnt + res->fw_cnt;
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void dpu_put_plane_grp_res(struct dpu_plane_grp *grp)
> > > +{
> > > + struct dpu_plane_res *res = &grp->res;
> > > + struct list_head *l, *tmp;
> > > + int i;
> > > +
> > > + grp->hw_plane_cnt = 0;
> > > +
> > > + list_for_each_safe(l, tmp, &grp->fu_list)
> > > + list_del(l);
> > > +
> > > +#define DPU_UNITS_PUT_FOR_PLANE_GRP(unit) \
> > > +do { \
> > > + for (i = 0; i < res->unit##_cnt; i++) { \
> > > + if (!IS_ERR_OR_NULL(res->unit[i])) \
> > > + dpu_##unit##_put(res->unit[i]); \
> > > + } \
> > > + res->unit##_cnt = 0; \
> > > +} while (0)
> > > +
> > > + DPU_UNITS_PUT_FOR_PLANE_GRP(fd);
> > > + DPU_UNITS_PUT_FOR_PLANE_GRP(fl);
> > > + DPU_UNITS_PUT_FOR_PLANE_GRP(fw);
> > > + DPU_UNITS_PUT_FOR_PLANE_GRP(lb);
> > > +}
> > > +
> > > +static int dpu_add_client_devices(struct dpu_soc *dpu)
> > > +{
> > > + struct device *dev = dpu->dev;
> > > + struct dpu_platform_reg *reg;
> > > + struct dpu_crtc_grp *crtc_grp;
> > > + struct dpu_plane_grp *plane_grp;
> > > + size_t client_cnt, reg_size;
> > > + int i, id, ret;
> > > +
> > > + client_cnt = ARRAY_SIZE(client_reg);
> > > +
> > > + reg = devm_kcalloc(dev, client_cnt, sizeof(*reg), GFP_KERNEL);
> > > + if (!reg)
> > > + return -ENOMEM;
> > > +
> > > + crtc_grp = devm_kzalloc(dev, sizeof(*crtc_grp), GFP_KERNEL);
> > > + if (!crtc_grp)
> > > + return -ENOMEM;
> > > +
> > > + plane_grp = devm_kzalloc(dev, sizeof(*plane_grp), GFP_KERNEL);
> > > + if (!plane_grp)
> > > + return -ENOMEM;
> > > +
> > > + crtc_grp->plane_grp = plane_grp;
> > > +
> > > + mutex_lock(&dpu_client_id_mutex);
> > > + id = dpu_client_id;
> > > + dpu_client_id += client_cnt;
> > > + mutex_unlock(&dpu_client_id_mutex);
> > > +
> > > + reg_size = client_cnt * sizeof(struct dpu_platform_reg);
> > > + memcpy(reg, &client_reg[0], reg_size);
> > > +
> > > + ret = dpu_get_plane_grp_res(dpu, plane_grp);
> > > + if (ret)
> > > + goto err_get_plane_res;
> > > +
> > > + for (i = 0; i < client_cnt; i++) {
> > > + struct platform_device *pdev;
> > > + struct device_node *np;
> > > +
> > > + /* Associate subdevice with the corresponding port node. */
> > > + np = of_graph_get_port_by_id(dev->of_node, i);
> > > + if (!np) {
> > > + dev_info(dev,
> > > + "no port@%d node in %s, not using DISP%d\n",
> > > + i, dev->of_node->full_name, i);
> > > + continue;
> > > + }
> > > +
> > > + reg[i].pdata.crtc_grp = crtc_grp;
> > > +
> > > + pdev = platform_device_alloc(reg[i].name, id++);
> > > + if (!pdev) {
> > > + ret = -ENOMEM;
> > > + goto err_register;
> > > + }
> > > +
> > > + pdev->dev.parent = dev;
> > > + pdev->dev.of_node = np;
> > > + pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
> > > + pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
> > > +
> > > + reg[i].pdata.of_node = np;
> > > + ret = platform_device_add_data(pdev, &reg[i].pdata,
> > > + sizeof(reg[i].pdata));
> > > + if (!ret)
> > > + ret = platform_device_add(pdev);
> > > + if (ret) {
> > > + platform_device_put(pdev);
> > > + goto err_register;
> > > + }
> > > + }
> > > +
> > > + return ret;
> > > +
> > > +err_register:
> > > + platform_device_unregister_children(to_platform_device(dev));
> > > +err_get_plane_res:
> > > + dpu_put_plane_grp_res(plane_grp);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int dpu_core_probe(struct platform_device *pdev)
> > > +{
> > > + struct device *dev = &pdev->dev;
> > > + struct device_node *np = dev->of_node;
> > > + struct dpu_soc *dpu;
> > > + struct resource *res;
> > > + unsigned long dpu_base;
> > > + int ret;
> > > +
> > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > + if (!res)
> > > + return -ENODEV;
> > > +
> > > + dpu_base = res->start;
> > > +
> > > + dpu = devm_kzalloc(dev, sizeof(*dpu), GFP_KERNEL);
> > > + if (!dpu)
> > > + return -ENOMEM;
> > > +
> > > + dpu->dev = dev;
> > > +
> > > + dpu->id = of_alias_get_id(np, "dpu");
> > > + if (dpu->id < 0) {
> > > + dev_err(dev, "failed to get dpu node alias id: %d\n", dpu->id);
> > > + return dpu->id;
> > > + }
> > > +
> > > + dpu_units_addr_dbg(dpu, dpu_base);
> > > +
> > > + ret = dpu_get_irq(pdev, dpu);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + dpu->comctrl_reg = devm_ioremap(dev, dpu_base, SZ_512);
> > > + if (!dpu->comctrl_reg)
> > > + return -ENOMEM;
> > > +
> > > + ret = dpu_attach_pm_domains(dpu);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + dpu->clk_cfg = devm_clk_get(dev, "cfg");
> > > + if (IS_ERR(dpu->clk_cfg)) {
> > > + ret = PTR_ERR(dpu->clk_cfg);
> > > + dev_err_probe(dev, ret, "failed to get cfg clock\n");
> > > + goto failed_clk_cfg_get;
> > > + }
> > > +
> > > + dpu->clk_axi = devm_clk_get(dev, "axi");
> > > + if (IS_ERR(dpu->clk_axi)) {
> > > + ret = PTR_ERR(dpu->clk_axi);
> > > + dev_err_probe(dev, ret, "failed to get axi clock\n");
> > > + goto failed_clk_axi_get;
> > > + }
> > > +
> > > + ret = dpu_irq_init(dpu);
> > > + if (ret)
> > > + goto failed_irq_init;
> > > +
> > > + ret = dpu_submodules_init(dpu, dpu_base);
> > > + if (ret)
> > > + goto failed_submodules_init;
> > > +
> > > + platform_set_drvdata(pdev, dpu);
> > > +
> > > + pm_runtime_enable(dev);
> > > +
> > > + ret = dpu_add_client_devices(dpu);
> > > + if (ret) {
> > > + dev_err(dev, "failed to add client devices: %d\n", ret);
> > > + goto failed_add_clients;
> > > + }
> > > +
> > > + return ret;
> > > +
> > > +failed_add_clients:
> > > + pm_runtime_disable(dev);
> > > +failed_submodules_init:
> > > + dpu_irq_exit(dpu);
> > > +failed_irq_init:
> > > +failed_clk_axi_get:
> > > +failed_clk_cfg_get:
> > > + dpu_detach_pm_domains(dpu);
> > > + return ret;
> > > +}
> > > +
> > > +static int dpu_core_remove(struct platform_device *pdev)
> > > +{
> > > + struct dpu_soc *dpu = platform_get_drvdata(pdev);
> > > +
> > > + platform_device_unregister_children(pdev);
> > > + pm_runtime_disable(dpu->dev);
> > > + dpu_irq_exit(dpu);
> > > + dpu_detach_pm_domains(dpu);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int __maybe_unused dpu_runtime_suspend(struct device *dev)
> > > +{
> > > + struct platform_device *pdev = to_platform_device(dev);
> > > + struct dpu_soc *dpu = platform_get_drvdata(pdev);
> > > +
> > > + clk_disable_unprepare(dpu->clk_axi);
> > > + clk_disable_unprepare(dpu->clk_cfg);
> > > +
> > > + dev_dbg(dev, "suspended\n");
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int __maybe_unused dpu_runtime_resume(struct device *dev)
> > > +{
> > > + struct platform_device *pdev = to_platform_device(dev);
> > > + struct dpu_soc *dpu = platform_get_drvdata(pdev);
> > > + int ret;
> > > +
> > > + ret = clk_prepare_enable(dpu->clk_cfg);
> > > + if (ret) {
> > > + dev_err(dev, "failed to enable cfg clock: %d\n", ret);
> > > + return ret;
> > > + }
> > > + ret = clk_prepare_enable(dpu->clk_axi);
> > > + if (ret) {
> > > + clk_disable_unprepare(dpu->clk_cfg);
> > > + dev_err(dev, "failed to enable axi clock: %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + dpu_irq_hw_init(dpu);
> > > +
> > > + dpu_submodules_hw_init(dpu);
> > > +
> > > + dev_dbg(dev, "resumed\n");
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static const struct dev_pm_ops dpu_pm_ops = {
> > > + SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> > > + pm_runtime_force_resume)
> > > + SET_RUNTIME_PM_OPS(dpu_runtime_suspend, dpu_runtime_resume, NULL)
> > > +};
> > > +
> > > +const struct of_device_id dpu_dt_ids[] = {
> > > + { .compatible = "fsl,imx8qxp-dpu" },
> >
> > I think you also need to add { .compatible = "fsl,imx8qm-dpu" }?
>
> Will add it after I test the driver with i.MX8qm.
>
> >
> > > + { /* sentinel */ }
> > > +};
> > > +MODULE_DEVICE_TABLE(of, dpu_dt_ids);
> > > +
> > > +struct platform_driver dpu_core_driver = {
> > > + .driver = {
> > > + .pm = &dpu_pm_ops,
> > > + .name = "dpu-core",
> > > + .of_match_table = dpu_dt_ids,
> > > + },
> > > + .probe = dpu_core_probe,
> > > + .remove = dpu_core_remove,
> > > +};
> > > diff --git a/drivers/gpu/drm/imx/dpu/dpu-crtc.c b/drivers/gpu/drm/imx/dpu/dpu-crtc.c
> > > new file mode 100644
> > > index 00000000..d99ed6e
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/imx/dpu/dpu-crtc.c
> > > @@ -0,0 +1,926 @@
> > > +// SPDX-License-Identifier: GPL-2.0+
> > > +
> > > +/*
> > > + * Copyright 2017-2020 NXP
> > > + */
> > > +
> > > +#include <linux/component.h>
> > > +#include <linux/irq.h>
> > > +#include <linux/irqflags.h>
> > > +#include <linux/pm_runtime.h>
> > > +#include <linux/preempt.h>
> > > +#include <linux/spinlock.h>
> > > +
> > > +#include <drm/drm_atomic.h>
> > > +#include <drm/drm_atomic_helper.h>
> > > +#include <drm/drm_atomic_state_helper.h>
> > > +#include <drm/drm_color_mgmt.h>
> > > +
> > > +#include "dpu.h"
> > > +#include "dpu-crtc.h"
> > > +#include "dpu-dprc.h"
> > > +#include "dpu-drv.h"
> > > +#include "dpu-plane.h"
> > > +
> > > +#define DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(_name) \
> > > +do { \
> > > + unsigned long ret; \
> > > + ret = wait_for_completion_timeout(&dpu_crtc->_name, HZ); \
> > > + if (ret == 0) \
> > > + drm_err(crtc->dev, "[CRTC:%d:%s] %s: wait for " #_name \
> > > + " timeout\n", \
> > > + crtc->base.id, crtc->name, __func__); \
> > > +} while (0)
> > > +
> > > +#define DPU_CRTC_WAIT_FOR_FRAMEGEN_FRAME_CNT_MOVING(fg) \
> > > +do { \
> > > + if (dpu_fg_wait_for_frame_counter_moving(fg)) \
> > > + drm_err(crtc->dev, "[CRTC:%d:%s] %s: " \
> > > + "FrameGen frame counter isn't moving\n", \
> > > + crtc->base.id, crtc->name, __func__); \
> > > +} while (0)
> > > +
> > > +#define DPU_CRTC_CHECK_FRAMEGEN_FIFO(fg) \
> > > +do { \
> > > + if (dpu_fg_secondary_requests_to_read_empty_fifo(fg)) { \
> > > + dpu_fg_secondary_clear_channel_status(fg); \
> > > + drm_err(crtc->dev, \
> > > + "[CRTC:%d:%s] %s: FrameGen FIFO empty\n", \
> > > + crtc->base.id, crtc->name, __func__); \
> > > + } \
> > > +} while (0)
> > > +
> > > +#define DPU_CRTC_WAIT_FOR_FRAMEGEN_SECONDARY_SYNCUP(fg) \
> > > +do { \
> > > + if (dpu_fg_wait_for_secondary_syncup(fg)) \
> > > + drm_err(crtc->dev, \
> > > + "[CRTC:%d:%s] %s: " \
> > > + "FrameGen secondary channel isn't syncup\n", \
> > > + crtc->base.id, crtc->name, __func__); \
> > > +} while (0)
> > > +
> > > +static u32 dpu_crtc_get_vblank_counter(struct drm_crtc *crtc)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > +
> > > + if (pm_runtime_active(dpu_crtc->dev->parent))
> > > + return dpu_fg_get_frame_index(dpu_crtc->fg);
> > > + else
> > > + return (u32)drm_crtc_vblank_count(crtc);
> > > +}
> > > +
> > > +static int dpu_crtc_enable_vblank(struct drm_crtc *crtc)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > +
> > > + enable_irq(dpu_crtc->dec_frame_complete_irq);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void dpu_crtc_disable_vblank(struct drm_crtc *crtc)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > +
> > > + disable_irq_nosync(dpu_crtc->dec_frame_complete_irq);
> > > +}
> > > +
> > > +static irqreturn_t
> > > +dpu_crtc_dec_frame_complete_irq_handler(int irq, void *dev_id)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = dev_id;
> > > + struct drm_crtc *crtc = &dpu_crtc->base;
> > > + unsigned long flags;
> > > +
> > > + drm_crtc_handle_vblank(crtc);
> > > +
> > > + spin_lock_irqsave(&crtc->dev->event_lock, flags);
> > > + if (dpu_crtc->event) {
> > > + drm_crtc_send_vblank_event(crtc, dpu_crtc->event);
> > > + dpu_crtc->event = NULL;
> > > + drm_crtc_vblank_put(crtc);
> > > + }
> > > + spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
> > > +
> > > + return IRQ_HANDLED;
> > > +}
> > > +
> > > +#define DPU_CRTC_IRQ_HANDLER_DEFINE(name) \
> > > +static irqreturn_t dpu_crtc_##name##_irq_handler(int irq, void *dev_id) \
> > > +{ \
> > > + struct dpu_crtc *dpu_crtc = dev_id; \
> > > + complete(&dpu_crtc->name##_done); \
> > > + return IRQ_HANDLED; \
> > > +}
> > > +
> > > +DPU_CRTC_IRQ_HANDLER_DEFINE(dec_seq_complete)
> > > +DPU_CRTC_IRQ_HANDLER_DEFINE(dec_shdld)
> > > +DPU_CRTC_IRQ_HANDLER_DEFINE(ed_cont_shdld)
> > > +DPU_CRTC_IRQ_HANDLER_DEFINE(ed_safe_shdld)
> > > +
> > > +static const struct drm_crtc_funcs dpu_crtc_funcs = {
> > > + .reset = drm_atomic_helper_crtc_reset,
> > > + .destroy = drm_crtc_cleanup,
> > > + .set_config = drm_atomic_helper_set_config,
> > > + .page_flip = drm_atomic_helper_page_flip,
> > > + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
> > > + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
> > > + .get_vblank_counter = dpu_crtc_get_vblank_counter,
> > > + .enable_vblank = dpu_crtc_enable_vblank,
> > > + .disable_vblank = dpu_crtc_disable_vblank,
> > > + .get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
> > > + .gamma_set = drm_atomic_helper_legacy_gamma_set,
> > > +};
> > > +
> > > +static void dpu_crtc_queue_state_event(struct drm_crtc *crtc)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > +
> > > + spin_lock_irq(&crtc->dev->event_lock);
> > > + if (crtc->state->event) {
> > > + WARN_ON(drm_crtc_vblank_get(crtc));
> > > + WARN_ON(dpu_crtc->event);
> > > + dpu_crtc->event = crtc->state->event;
> > > + crtc->state->event = NULL;
> > > + }
> > > + spin_unlock_irq(&crtc->dev->event_lock);
> > > +}
> > > +
> > > +static enum drm_mode_status
> > > +dpu_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
> > > +{
> > > + if (mode->crtc_clock > DPU_FRAMEGEN_MAX_CLOCK)
> > > + return MODE_CLOCK_HIGH;
> > > +
> > > + return MODE_OK;
> > > +}
> > > +
> > > +static void dpu_crtc_pm_runtime_get_sync(struct drm_crtc *crtc)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + int ret;
> > > +
> > > + ret = pm_runtime_get_sync(dpu_crtc->dev->parent);
> > > + if (ret < 0) {
> > > + pm_runtime_put_noidle(dpu_crtc->dev->parent);
> > > + drm_err(crtc->dev,
> > > + "[CRTC:%d:%s]: failed to get parent device RPM sync\n",
> > > + crtc->base.id, crtc->name);
> > > + }
> > > +}
> > > +
> > > +static void dpu_crtc_pm_runtime_put(struct drm_crtc *crtc)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + int ret;
> > > +
> > > + ret = pm_runtime_put(dpu_crtc->dev->parent);
> > > + if (ret < 0) {
> > > + drm_err(crtc->dev,
> > > + "[CRTC:%d:%s]: failed to put parent device RPM\n",
> > > + crtc->base.id, crtc->name);
> > > + }
> > > +}
> > > +
> > > +static void dpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + struct drm_display_mode *adj = &crtc->state->adjusted_mode;
> > > + enum dpu_link_id cf_link;
> > > +
> > > + dpu_crtc_dbg(crtc, "mode " DRM_MODE_FMT "\n", DRM_MODE_ARG(adj));
> > > +
> > > + /* request power-on when we start to set mode for CRTC */
> > > + dpu_crtc_pm_runtime_get_sync(crtc);
> > > +
> > > + dpu_fg_displaymode(dpu_crtc->fg, FG_DM_SEC_ON_TOP);
> > > + dpu_fg_panic_displaymode(dpu_crtc->fg, FG_DM_CONSTCOL);
> > > + dpu_fg_cfg_videomode(dpu_crtc->fg, adj);
> > > +
> > > + dpu_tcon_cfg_videomode(dpu_crtc->tcon, adj);
> > > + dpu_tcon_set_fmt(dpu_crtc->tcon);
> > > +
> > > + dpu_cf_framedimensions(dpu_crtc->cf_cont,
> > > + adj->crtc_hdisplay, adj->crtc_vdisplay);
> > > + dpu_cf_framedimensions(dpu_crtc->cf_safe,
> > > + adj->crtc_hdisplay, adj->crtc_vdisplay);
> > > + /* constframe in content stream shows black frame - CRTC background */
> > > + dpu_cf_constantcolor_black(dpu_crtc->cf_cont);
> > > + /* constframe in safety stream shows blue frame */
> > > + dpu_cf_constantcolor_blue(dpu_crtc->cf_safe);
> > > +
> > > + cf_link = dpu_cf_get_link_id(dpu_crtc->cf_safe);
> > > + dpu_ed_pec_src_sel(dpu_crtc->ed_safe, cf_link);
> > > +
> > > + cf_link = dpu_cf_get_link_id(dpu_crtc->cf_cont);
> > > + dpu_ed_pec_src_sel(dpu_crtc->ed_cont, cf_link);
> > > +}
> > > +
> > > +static int dpu_crtc_atomic_check_gamma(struct drm_crtc *crtc,
> > > + struct drm_crtc_state *state)
> > > +{
> > > + size_t lut_size;
> > > +
> > > + if (!state->color_mgmt_changed || !state->gamma_lut)
> > > + return 0;
> > > +
> > > + if (crtc->state->gamma_lut &&
> > > + (crtc->state->gamma_lut->base.id == state->gamma_lut->base.id))
> > > + return 0;
> > > +
> > > + if (state->gamma_lut->length % sizeof(struct drm_color_lut)) {
> > > + dpu_crtc_dbg(crtc, "wrong gamma_lut length\n");
> > > + return -EINVAL;
> > > + }
> > > +
> > > + lut_size = state->gamma_lut->length / sizeof(struct drm_color_lut);
> > > + if (lut_size != 256) {
> > > + dpu_crtc_dbg(crtc, "gamma_lut size is not 256\n");
> > > + return -EINVAL;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
> > > + struct drm_atomic_state *state)
> > > +{
> > > + struct drm_crtc_state *crtc_state;
> > > + int ret;
> > > +
> > > + crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
> > > +
> > > + ret = dpu_crtc_atomic_check_gamma(crtc, crtc_state);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + /* force a mode set if the CRTC is changed to active */
> > > + if (crtc_state->active_changed && crtc_state->active) {
> > > + /*
> > > + * If mode_changed is set by us, call
> > > + * drm_atomic_helper_check_modeset() as it's Kerneldoc requires.
> > > + */
> > > + if (!crtc_state->mode_changed) {
> > > + crtc_state->mode_changed = true;
> > > +
> > > + ret = drm_atomic_helper_check_modeset(crtc->dev, state);
> > > + if (ret)
> > > + return ret;
> > > + }
> > > + }
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void dpu_crtc_atomic_begin(struct drm_crtc *crtc,
> > > + struct drm_atomic_state *state)
> > > +{
> > > + struct drm_crtc_state *old_crtc_state;
> > > + struct drm_atomic_state *old_state;
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + struct drm_plane *plane;
> > > + struct drm_plane_state *old_plane_state;
> > > + struct dpu_plane_state *old_dpstate;
> > > + struct dpu_fetchunit *fu;
> > > + const struct dpu_fetchunit_ops *fu_ops;
> > > + enum dpu_link_id cf_link;
> > > + int i;
> > > +
> > > + old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
> > > + old_state = old_crtc_state->state;
> > > +
> > > + /* do nothing if planes keep being disabled */
> > > + if (old_crtc_state->plane_mask == 0 && crtc->state->plane_mask == 0)
> > > + return;
> > > +
> > > + /* request power-on when any plane starts to be active */
> > > + if (old_crtc_state->plane_mask == 0 && crtc->state->plane_mask != 0)
> > > + dpu_crtc_pm_runtime_get_sync(crtc);
> > > +
> > > + /*
> > > + * Disable relevant planes' resources in SHADOW only.
> > > + * Whether any of them would be disabled or kept running depends
> > > + * on new plane states in the new global atomic state.
> > > + */
> > > + for_each_old_plane_in_state(old_state, plane, old_plane_state, i) {
> > > + old_dpstate = to_dpu_plane_state(old_plane_state);
> > > +
> > > + if (!old_plane_state->fb)
> > > + continue;
> > > +
> > > + if (old_plane_state->crtc != crtc)
> > > + continue;
> > > +
> > > + fu = old_dpstate->source;
> > > +
> > > + fu_ops = dpu_fu_get_ops(fu);
> > > +
> > > + fu_ops->disable_src_buf(fu);
> > > +
> > > + if (old_dpstate->is_top) {
> > > + cf_link = dpu_cf_get_link_id(dpu_crtc->cf_cont);
> > > + dpu_ed_pec_src_sel(dpu_crtc->ed_cont, cf_link);
> > > + }
> > > + }
> > > +}
> > > +
> > > +static void dpu_crtc_set_gammacor(struct dpu_crtc *dpu_crtc)
> > > +{
> > > + struct drm_crtc *crtc = &dpu_crtc->base;
> > > + struct drm_color_lut *lut;
> > > +
> > > + lut = (struct drm_color_lut *)crtc->state->gamma_lut->data;
> > > +
> > > + dpu_gc_enable_rgb_write(dpu_crtc->gc);
> > > + dpu_gc_mode(dpu_crtc->gc, GC_GAMMACOR);
> > > +
> > > + dpu_gc_start_rgb(dpu_crtc->gc, lut);
> > > + dpu_gc_delta_rgb(dpu_crtc->gc, lut);
> > > +}
> > > +
> > > +static void dpu_crtc_set_gammacor_sync(struct dpu_crtc *dpu_crtc)
> > > +{
> > > + struct drm_crtc *crtc = &dpu_crtc->base;
> > > +
> > > + enable_irq(dpu_crtc->dec_shdld_irq);
> > > +
> > > + dpu_crtc_set_gammacor(dpu_crtc);
> > > + dpu_fg_shdtokgen(dpu_crtc->fg);
> > > + DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(dec_shdld_done);
> > > +
> > > + disable_irq(dpu_crtc->dec_shdld_irq);
> > > +}
> > > +
> > > +static void dpu_crtc_disable_gammacor(struct dpu_crtc *dpu_crtc)
> > > +{
> > > + dpu_gc_mode(dpu_crtc->gc, GC_NEUTRAL);
> > > + dpu_gc_disable_rgb_write(dpu_crtc->gc);
> > > +}
> > > +
> > > +static void dpu_crtc_disable_gammacor_sync(struct dpu_crtc *dpu_crtc)
> > > +{
> > > + struct drm_crtc *crtc = &dpu_crtc->base;
> > > +
> > > + enable_irq(dpu_crtc->dec_shdld_irq);
> > > +
> > > + dpu_crtc_disable_gammacor(dpu_crtc);
> > > + dpu_fg_shdtokgen(dpu_crtc->fg);
> > > + DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(dec_shdld_done);
> > > +
> > > + disable_irq(dpu_crtc->dec_shdld_irq);
> > > +}
> > > +
> > > +static void dpu_crtc_atomic_flush(struct drm_crtc *crtc,
> > > + struct drm_atomic_state *state)
> > > +{
> > > + struct drm_crtc_state *old_crtc_state;
> > > + struct drm_atomic_state *old_state;
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + struct drm_plane *plane;
> > > + struct drm_plane_state *old_plane_state;
> > > + struct dpu_plane_state *old_dpstate;
> > > + struct dpu_fetchunit *fu;
> > > + struct dpu_dprc *dprc;
> > > + const struct dpu_fetchunit_ops *fu_ops;
> > > + bool need_modeset = drm_atomic_crtc_needs_modeset(crtc->state);
> > > + unsigned long flags;
> > > + int i;
> > > +
> > > + old_crtc_state = drm_atomic_get_old_crtc_state(state, crtc);
> > > + old_state = old_crtc_state->state;
> > > +
> > > + if (old_crtc_state->plane_mask == 0 && crtc->state->plane_mask == 0) {
> > > + /* Queue a pending vbl event if necessary. */
> > > + if (!need_modeset && crtc->state->active)
> > > + dpu_crtc_queue_state_event(crtc);
> > > + return;
> > > + }
> > > +
> > > + if (!need_modeset && crtc->state->active)
> > > + enable_irq(dpu_crtc->ed_cont_shdld_irq);
> > > +
> > > + /*
> > > + * Don't relinquish CPU until DPRC repeat_en is disabled
> > > + * and flush is done(if necessary).
> > > + */
> > > + local_irq_save(flags);
> > > + preempt_disable();
> > > +
> > > + /*
> > > + * Scan over old plane fetchunits to determine if we
> > > + * need to wait for FrameGen frame counter moving in
> > > + * the next loop prior to DPRC repeat_en disablement
> > > + * or not.
> > > + */
> > > + for_each_old_plane_in_state(old_state, plane, old_plane_state, i) {
> > > + old_dpstate = to_dpu_plane_state(old_plane_state);
> > > +
> > > + if (!old_plane_state->fb)
> > > + continue;
> > > +
> > > + if (old_plane_state->crtc != crtc)
> > > + continue;
> > > +
> > > + fu = old_dpstate->source;
> > > +
> > > + fu_ops = dpu_fu_get_ops(fu);
> > > +
> > > + /*
> > > + * Sync with FrameGen frame counter moving so that
> > > + * we may disable DPRC repeat_en correctly.
> > > + */
> > > + if (!fu_ops->is_enabled(fu) && !need_modeset &&
> > > + old_crtc_state->active) {
> > > + DPU_CRTC_WAIT_FOR_FRAMEGEN_FRAME_CNT_MOVING(dpu_crtc->fg);
> > > + break;
> > > + }
> > > + }
> > > +
> > > + /*
> > > + * Set no stream id for disabled fetchunits of relevant planes.
> > > + * Also, disable DPRC repeat_en if necessary.
> > > + */
> > > + for_each_old_plane_in_state(old_state, plane, old_plane_state, i) {
> > > + old_dpstate = to_dpu_plane_state(old_plane_state);
> > > +
> > > + if (!old_plane_state->fb)
> > > + continue;
> > > +
> > > + if (old_plane_state->crtc != crtc)
> > > + continue;
> > > +
> > > + fu = old_dpstate->source;
> > > +
> > > + fu_ops = dpu_fu_get_ops(fu);
> > > +
> > > + if (!fu_ops->is_enabled(fu)) {
> > > + fu_ops->set_no_stream_id(fu);
> > > +
> > > + dprc = fu_ops->get_dprc(fu);
> > > + dpu_dprc_disable_repeat_en(dprc);
> > > + }
> > > + }
> > > +
> > > + if (!need_modeset && crtc->state->active) {
> > > + /*
> > > + * Flush plane(s) update out to display & queue a pending
> > > + * vbl event if necessary.
> > > + */
> > > + dpu_ed_pec_sync_trigger(dpu_crtc->ed_cont);
> > > +
> > > + local_irq_restore(flags);
> > > + preempt_enable();
> > > +
> > > + if (old_crtc_state->gamma_lut && !crtc->state->gamma_lut)
> > > + dpu_crtc_disable_gammacor_sync(dpu_crtc);
> > > + else if (old_crtc_state->gamma_lut && crtc->state->gamma_lut &&
> > > + old_crtc_state->gamma_lut->base.id !=
> > > + crtc->state->gamma_lut->base.id)
> > > + dpu_crtc_set_gammacor_sync(dpu_crtc);
> > > +
> > > + DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(ed_cont_shdld_done);
> > > +
> > > + disable_irq(dpu_crtc->ed_cont_shdld_irq);
> > > +
> > > + DPU_CRTC_CHECK_FRAMEGEN_FIFO(dpu_crtc->fg);
> > > +
> > > + dpu_crtc_queue_state_event(crtc);
> > > + } else {
> > > + /*
> > > + * Simply flush and hope that any update takes effect
> > > + * if CRTC is disabled. This helps for the case where
> > > + * migrating plane(s) from a disabled CRTC to the other
> > > + * CRTC.
> > > + */
> > > + if (!crtc->state->active)
> > > + dpu_ed_pec_sync_trigger(dpu_crtc->ed_cont);
> > > +
> > > + local_irq_restore(flags);
> > > + preempt_enable();
> > > + }
> > > +
> > > + /* request power-off when all planes are off */
> > > + if (old_crtc_state->plane_mask != 0 && crtc->state->plane_mask == 0)
> > > + dpu_crtc_pm_runtime_put(crtc);
> > > +}
> > > +
> > > +static void dpu_crtc_atomic_enable(struct drm_crtc *crtc,
> > > + struct drm_atomic_state *state)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + unsigned long flags;
> > > +
> > > + drm_crtc_vblank_on(crtc);
> > > +
> > > + enable_irq(dpu_crtc->dec_shdld_irq);
> > > + enable_irq(dpu_crtc->ed_cont_shdld_irq);
> > > + enable_irq(dpu_crtc->ed_safe_shdld_irq);
> > > +
> > > + dpu_fg_enable_clock(dpu_crtc->fg);
> > > + dpu_ed_pec_sync_trigger(dpu_crtc->ed_cont);
> > > + dpu_ed_pec_sync_trigger(dpu_crtc->ed_safe);
> > > + if (crtc->state->gamma_lut)
> > > + dpu_crtc_set_gammacor(dpu_crtc);
> > > + else
> > > + dpu_crtc_disable_gammacor(dpu_crtc);
> > > + dpu_fg_shdtokgen(dpu_crtc->fg);
> > > +
> > > + /* don't relinquish CPU until TCON is set to operation mode */
> > > + local_irq_save(flags);
> > > + preempt_disable();
> > > + dpu_fg_enable(dpu_crtc->fg);
> > > +
> > > + /*
> > > + * TKT320590:
> > > + * Turn TCON into operation mode as soon as the first dumb
> > > + * frame is generated by DPU(we don't relinquish CPU to ensure
> > > + * this). This makes DPR/PRG be able to evade the frame.
> > > + */
> > > + DPU_CRTC_WAIT_FOR_FRAMEGEN_FRAME_CNT_MOVING(dpu_crtc->fg);
> > > + dpu_tcon_set_operation_mode(dpu_crtc->tcon);
> > > + local_irq_restore(flags);
> > > + preempt_enable();
> > > +
> > > + DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(ed_safe_shdld_done);
> > > + DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(ed_cont_shdld_done);
> > > + DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(dec_shdld_done);
> > > +
> > > + disable_irq(dpu_crtc->ed_safe_shdld_irq);
> > > + disable_irq(dpu_crtc->ed_cont_shdld_irq);
> > > + disable_irq(dpu_crtc->dec_shdld_irq);
> > > +
> > > + DPU_CRTC_WAIT_FOR_FRAMEGEN_SECONDARY_SYNCUP(dpu_crtc->fg);
> > > +
> > > + DPU_CRTC_CHECK_FRAMEGEN_FIFO(dpu_crtc->fg);
> > > +
> > > + dpu_crtc_queue_state_event(crtc);
> > > +}
> > > +
> > > +static void dpu_crtc_atomic_disable(struct drm_crtc *crtc,
> > > + struct drm_atomic_state *state)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + struct drm_plane *plane;
> > > + struct drm_plane_state *old_plane_state;
> > > + struct dpu_plane_state *old_dpstate;
> > > + struct dpu_fetchunit *fu;
> > > + struct dpu_dprc *dprc;
> > > + const struct dpu_fetchunit_ops *fu_ops;
> > > + unsigned long flags;
> > > + int i;
> > > +
> > > + enable_irq(dpu_crtc->dec_seq_complete_irq);
> > > +
> > > + /* don't relinquish CPU until DPRC repeat_en is disabled */
> > > + local_irq_save(flags);
> > > + preempt_disable();
> > > + /*
> > > + * Sync to FrameGen frame counter moving so that
> > > + * FrameGen can be disabled in the next frame.
> > > + */
> > > + DPU_CRTC_WAIT_FOR_FRAMEGEN_FRAME_CNT_MOVING(dpu_crtc->fg);
> > > + dpu_fg_disable(dpu_crtc->fg);
> > > + /*
> > > + * There is one frame leftover after FrameGen disablement.
> > > + * Sync to FrameGen frame counter moving so that
> > > + * DPRC repeat_en can be disabled in the next frame.
> > > + */
> > > + DPU_CRTC_WAIT_FOR_FRAMEGEN_FRAME_CNT_MOVING(dpu_crtc->fg);
> > > +
> > > + for_each_old_plane_in_state(state, plane, old_plane_state, i) {
> > > + old_dpstate = to_dpu_plane_state(old_plane_state);
> > > +
> > > + if (!old_plane_state->fb)
> > > + continue;
> > > +
> > > + if (old_plane_state->crtc != crtc)
> > > + continue;
> > > +
> > > + fu = old_dpstate->source;
> > > +
> > > + fu_ops = dpu_fu_get_ops(fu);
> > > +
> > > + dprc = fu_ops->get_dprc(fu);
> > > + dpu_dprc_disable_repeat_en(dprc);
> > > + }
> > > +
> > > + local_irq_restore(flags);
> > > + preempt_enable();
> > > +
> > > + DPU_CRTC_WAIT_FOR_COMPLETION_TIMEOUT(dec_seq_complete_done);
> > > +
> > > + disable_irq(dpu_crtc->dec_seq_complete_irq);
> > > +
> > > + dpu_fg_disable_clock(dpu_crtc->fg);
> > > +
> > > + drm_crtc_vblank_off(crtc);
> > > +
> > > + spin_lock_irq(&crtc->dev->event_lock);
> > > + if (crtc->state->event && !crtc->state->active) {
> > > + drm_crtc_send_vblank_event(crtc, crtc->state->event);
> > > + crtc->state->event = NULL;
> > > + }
> > > + spin_unlock_irq(&crtc->dev->event_lock);
> > > +
> > > + /* request power-off when CRTC is disabled */
> > > + dpu_crtc_pm_runtime_put(crtc);
> > > +}
> > > +
> > > +static bool dpu_crtc_get_scanout_position(struct drm_crtc *crtc,
> > > + bool in_vblank_irq,
> > > + int *vpos, int *hpos,
> > > + ktime_t *stime, ktime_t *etime,
> > > + const struct drm_display_mode *mode)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
> > > + int vdisplay = mode->crtc_vdisplay;
> > > + int vtotal = mode->crtc_vtotal;
> > > + int line;
> > > + bool reliable;
> > > +
> > > + if (stime)
> > > + *stime = ktime_get();
> > > +
> > > + if (pm_runtime_active(dpu_crtc->dev->parent)) {
> > > + /* line index starts with 0 for the first active output line */
> > > + line = dpu_fg_get_line_index(dpu_crtc->fg);
> > > +
> > > + if (line < vdisplay)
> > > + /* active scanout area - positive */
> > > + *vpos = line + 1;
> > > + else
> > > + /* inside vblank - negative */
> > > + *vpos = line - (vtotal - 1);
> > > +
> > > + reliable = true;
> > > + } else {
> > > + *vpos = 0;
> > > + reliable = false;
> > > + }
> > > +
> > > + *hpos = 0;
> > > +
> > > + if (etime)
> > > + *etime = ktime_get();
> > > +
> > > + return reliable;
> > > +}
> > > +
> > > +static const struct drm_crtc_helper_funcs dpu_helper_funcs = {
> > > + .mode_valid = dpu_crtc_mode_valid,
> > > + .mode_set_nofb = dpu_crtc_mode_set_nofb,
> > > + .atomic_check = dpu_crtc_atomic_check,
> > > + .atomic_begin = dpu_crtc_atomic_begin,
> > > + .atomic_flush = dpu_crtc_atomic_flush,
> > > + .atomic_enable = dpu_crtc_atomic_enable,
> > > + .atomic_disable = dpu_crtc_atomic_disable,
> > > + .get_scanout_position = dpu_crtc_get_scanout_position,
> > > +};
> > > +
> > > +static void dpu_crtc_put_resources(struct dpu_crtc *dpu_crtc)
> > > +{
> > > +#define DPU_CRTC_PUT_RSC(unit) \
> > > +do { \
> > > + if (!IS_ERR_OR_NULL(dpu_crtc->unit)) \
> > > + dpu_##unit##_put(dpu_crtc->unit); \
> > > +} while (0)
> > > +
> > > + DPU_CRTC_PUT_RSC(cf_cont);
> > > + DPU_CRTC_PUT_RSC(cf_safe);
> > > + DPU_CRTC_PUT_RSC(dec);
> > > + DPU_CRTC_PUT_RSC(ed_cont);
> > > + DPU_CRTC_PUT_RSC(ed_safe);
> > > + DPU_CRTC_PUT_RSC(fg);
> > > + DPU_CRTC_PUT_RSC(gc);
> > > + DPU_CRTC_PUT_RSC(tcon);
> > > +}
> > > +
> > > +static int dpu_crtc_get_resources(struct dpu_crtc *dpu_crtc)
> > > +{
> > > + struct dpu_soc *dpu = dev_get_drvdata(dpu_crtc->dev->parent);
> > > + int ret = 0;
> > > +
> > > +#define DPU_CRTC_GET_RSC(unit) \
> > > +do { \
> > > + dpu_crtc->unit = dpu_##unit##_get(dpu, dpu_crtc->stream_id); \
> > > + if (IS_ERR(dpu_crtc->unit)) { \
> > > + ret = PTR_ERR(dpu_crtc->unit); \
> > > + goto err_out; \
> > > + } \
> > > +} while (0)
> > > +
> > > + DPU_CRTC_GET_RSC(cf_cont);
> > > + DPU_CRTC_GET_RSC(cf_safe);
> > > + DPU_CRTC_GET_RSC(dec);
> > > + DPU_CRTC_GET_RSC(ed_cont);
> > > + DPU_CRTC_GET_RSC(ed_safe);
> > > + DPU_CRTC_GET_RSC(fg);
> > > + DPU_CRTC_GET_RSC(gc);
> > > + DPU_CRTC_GET_RSC(tcon);
> > > +
> > > + return ret;
> > > +err_out:
> > > + dpu_crtc_put_resources(dpu_crtc);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int dpu_crtc_init(struct dpu_crtc *dpu_crtc,
> > > + struct dpu_client_platformdata *pdata,
> > > + struct dpu_drm_device *dpu_drm)
> > > +{
> > > + struct drm_device *drm = &dpu_drm->base;
> > > + struct dpu_soc *dpu = dev_get_drvdata(dpu_crtc->dev->parent);
> > > + struct drm_crtc *crtc = &dpu_crtc->base;
> > > + struct dpu_plane *dpu_plane;
> > > + struct dpu_crtc_grp *crtc_grp = pdata->crtc_grp;
> > > + struct dpu_plane_grp *plane_grp = crtc_grp->plane_grp;
> > > + unsigned int stream_id = pdata->stream_id;
> > > + unsigned int crtc_cnt;
> > > + int i, ret;
> > > +
> > > + init_completion(&dpu_crtc->dec_seq_complete_done);
> > > + init_completion(&dpu_crtc->dec_shdld_done);
> > > + init_completion(&dpu_crtc->ed_cont_shdld_done);
> > > + init_completion(&dpu_crtc->ed_safe_shdld_done);
> > > +
> > > + dpu_crtc->grp = crtc_grp;
> > > + dpu_crtc->stream_id = stream_id;
> > > + dpu_crtc->hw_plane_cnt = plane_grp->hw_plane_cnt;
> > > +
> > > + ret = dpu_crtc_get_resources(dpu_crtc);
> > > + if (ret) {
> > > + drm_err(drm, "failed to get HW resources for CRTC: %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + plane_grp->cf[stream_id] = dpu_crtc->cf_cont;
> > > + plane_grp->ed[stream_id] = dpu_crtc->ed_cont;
> > > +
> > > + /* each CRTC has a primary plane */
> > > + dpu_plane = dpu_plane_initialize(drm, 0, plane_grp,
> > > + DRM_PLANE_TYPE_PRIMARY);
> > > + if (IS_ERR(dpu_plane)) {
> > > + ret = PTR_ERR(dpu_plane);
> > > + drm_err(drm, "failed to init primary plane: %d\n", ret);
> > > + goto err_put_resources;
> > > + }
> > > +
> > > + drm_crtc_helper_add(crtc, &dpu_helper_funcs);
> > > +
> > > + ret = drm_crtc_init_with_planes(drm, crtc, &dpu_plane->base,
> > > + NULL, &dpu_crtc_funcs, NULL);
> > > + if (ret) {
> > > + drm_err(drm, "failed to add CRTC: %d\n", ret);
> > > + goto err_put_resources;
> > > + }
> > > +
> > > + /* X server assumes 256 element gamma table so let's use that. */
> > > + ret = drm_mode_crtc_set_gamma_size(crtc, 256);
> > > + if (ret) {
> > > + drm_err(drm, "failed to set CRTC gamma size: %d\n", ret);
> > > + goto err_put_resources;
> > > + }
> > > +
> > > + drm_crtc_enable_color_mgmt(crtc, 0, false, 256);
> > > +
> > > + dpu_crtc->encoder->possible_crtcs = drm_crtc_mask(crtc);
> > > + crtc_grp->crtc_mask |= drm_crtc_mask(crtc);
> > > + crtc_cnt = hweight32(crtc_grp->crtc_mask);
> > > +
> > > + /* initialize shared overlay planes for CRTCs in a CRTC group */
> > > + if (crtc_cnt == DPU_CRTC_CNT_IN_GRP) {
> > > + /*
> > > + * All HW planes in a plane group are shared by CRTCs in a
> > > + * CRTC group. They will be assigned to either primary plane
> > > + * or overlay plane dynamically in runtime. Considering a
> > > + * CRTC consumes all HW planes and primary plane takes one
> > > + * HW plane, so overlay plane count for a CRTC group should
> > > + * be plane_grp->hw_plane_cnt - 1.
> > > + */
> > > + for (i = 1; i < plane_grp->hw_plane_cnt; i++) {
> > > + dpu_plane =
> > > + dpu_plane_initialize(drm, crtc_grp->crtc_mask,
> > > + plane_grp,
> > > + DRM_PLANE_TYPE_OVERLAY);
> > > + if (IS_ERR(dpu_plane)) {
> > > + ret = PTR_ERR(dpu_plane);
> > > + drm_err(drm,
> > > + "failed to init overlay plane(%d): %d\n",
> > > + i, ret);
> > > + goto err_put_resources;
> > > + }
> > > + }
> > > + }
> > > +
> > > + ret = pm_runtime_get_sync(dpu_crtc->dev->parent);
> > > + if (ret < 0) {
> > > + pm_runtime_put_noidle(dpu_crtc->dev->parent);
> > > + drm_err(drm, "failed to get parent device RPM sync: %d\n", ret);
> > > + goto err_put_resources;
> > > + }
> > > +
> > > +#define DPU_CRTC_REQUEST_IRQ(name) \
> > > +do { \
> > > + dpu_crtc->name##_irq = dpu_map_irq(dpu, pdata->name##_irq); \
> > > + irq_set_status_flags(dpu_crtc->name##_irq, IRQ_DISABLE_UNLAZY); \
> > > + ret = devm_request_irq(dpu_crtc->dev, dpu_crtc->name##_irq, \
> > > + dpu_crtc_##name##_irq_handler, \
> > > + 0, dev_name(dpu_crtc->dev), dpu_crtc); \
> > > + if (ret < 0) { \
> > > + drm_err(drm, "failed to request irq(%u): %d\n", \
> > > + dpu_crtc->name##_irq, ret); \
> > > + goto err_put_pm_runtime; \
> > > + } \
> > > + disable_irq(dpu_crtc->name##_irq); \
> > > +} while (0)
> > > +
> > > + DPU_CRTC_REQUEST_IRQ(dec_frame_complete);
> > > + DPU_CRTC_REQUEST_IRQ(dec_seq_complete);
> > > + DPU_CRTC_REQUEST_IRQ(dec_shdld);
> > > + DPU_CRTC_REQUEST_IRQ(ed_cont_shdld);
> > > + DPU_CRTC_REQUEST_IRQ(ed_safe_shdld);
> >
> > Are these interrupts freed anywhere? Since dpu_crtc_init() is called from
> > bind() you can't rely on devm to free your resources. You need to explicitly
> > free them in unbind().
>
> The component driver would free them.
> See devres_release_group() called from component_bind() and
> component_unbind() in drivers/base/component.c.

I guess you're right. I'll probably have to look at the code too instead of
relying solely on documentation... :/ The piece of documentation that I read
some time ago, which is still present in component.h, was this:

"""
* Note that the lifetime of the aggregate driver does not align with
* any of the underlying &struct device instances. Therefore devm cannot
* be used and all resources acquired or allocated in this callback must
* be explicitly released in the @unbind callback.
"""

Either this is obsolete or I'm missing something here... This snippet is from
the component master ops bind(). However, devres_{open/release}_group() appear
to be used in try_to_bring_up_master()/take_down_master(). So, devm usage should
be safe...

Thanks,
laurentiu

>
> >
> > > +
> > > + ret = pm_runtime_put(dpu_crtc->dev->parent);
> > > + if (ret < 0) {
> > > + drm_err(drm, "failed to put parent device RPM: %d\n", ret);
> > > + dpu_crtc_put_resources(dpu_crtc);
> > > + }
> > > +
> > > + return ret;
> > > +
> > > +err_put_pm_runtime:
> > > + pm_runtime_put(dpu_crtc->dev->parent);
> > > +err_put_resources:
> > > + dpu_crtc_put_resources(dpu_crtc);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int dpu_crtc_bind(struct device *dev, struct device *master, void *data)
> > > +{
> > > + struct dpu_client_platformdata *pdata = dev->platform_data;
> > > + struct dpu_drm_device *dpu_drm = data;
> > > + struct dpu_crtc *dpu_crtc;
> > > + bool found = false;
> > > + int ret;
> > > +
> > > + list_for_each_entry(dpu_crtc, &dpu_drm->crtc_list, node) {
> > > + if (dpu_crtc->np == dev->of_node) {
> > > + found = true;
> > > + break;
> > > + }
> > > + }
> > > +
> > > + if (!found) {
> > > + drm_err(&dpu_drm->base, "failed to find CRTC OF node\n");
> > > + return -ENODEV;
> > > + }
> > > +
> > > + dpu_crtc->dev = dev;
> > > +
> > > + ret = dpu_crtc_init(dpu_crtc, pdata, dpu_drm);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + dev_set_drvdata(dev, dpu_crtc);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void dpu_crtc_unbind(struct device *dev, struct device *master,
> > > + void *data)
> > > +{
> > > + struct dpu_crtc *dpu_crtc = dev_get_drvdata(dev);
> > > +
> > > + dpu_crtc_put_resources(dpu_crtc);
> > > +}
> > > +
> > > +static const struct component_ops dpu_crtc_ops = {
> > > + .bind = dpu_crtc_bind,
> > > + .unbind = dpu_crtc_unbind,
> > > +};
> > > +
> > > +static int dpu_crtc_probe(struct platform_device *pdev)
> > > +{
> > > + struct device *dev = &pdev->dev;
> > > +
> > > + if (!dev->platform_data)
> > > + return -EINVAL;
> > > +
> > > + return component_add(dev, &dpu_crtc_ops);
> > > +}
> > > +
> > > +static int dpu_crtc_remove(struct platform_device *pdev)
> > > +{
> > > + component_del(&pdev->dev, &dpu_crtc_ops);
> > > + return 0;
> > > +}
> > > +
> > > +struct platform_driver dpu_crtc_driver = {
> > > + .driver = {
> > > + .name = "imx-dpu-crtc",
> > > + },
> > > + .probe = dpu_crtc_probe,
> > > + .remove = dpu_crtc_remove,
> > > +};
> >
> > [...]
> >
> > > diff --git a/drivers/gpu/drm/imx/dpu/dpu-drv.c b/drivers/gpu/drm/imx/dpu/dpu-drv.c
> > > new file mode 100644
> > > index 00000000..2416b66
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/imx/dpu/dpu-drv.c
> > > @@ -0,0 +1,296 @@
> > > +// SPDX-License-Identifier: GPL-2.0+
> > > +
> > > +/*
> > > + * Copyright 2019,2020 NXP
> > > + */
> > > +
> > > +#include <linux/component.h>
> > > +#include <linux/dma-mapping.h>
> > > +#include <linux/kernel.h>
> > > +#include <linux/module.h>
> > > +#include <linux/of.h>
> > > +#include <linux/platform_device.h>
> > > +
> > > +#include <drm/drm_atomic_helper.h>
> > > +#include <drm/drm_drv.h>
> > > +#include <drm/drm_fb_helper.h>
> > > +#include <drm/drm_gem_cma_helper.h>
> > > +#include <drm/drm_modeset_helper.h>
> > > +#include <drm/drm_of.h>
> > > +#include <drm/drm_print.h>
> > > +#include <drm/drm_probe_helper.h>
> > > +#include <drm/drm_vblank.h>
> > > +
> > > +#include "dpu-drv.h"
> > > +#include "dpu-kms.h"
> > > +
> > > +#define DRIVER_NAME "imx-dpu-drm"
> > > +
> > > +static int legacyfb_depth = 32;
> > > +module_param(legacyfb_depth, uint, 0444);
> > > +
> > > +struct dpu_drm_drv_data {
> > > + struct list_head crtc_np_list;
> > > +};
> > > +
> > > +DEFINE_DRM_GEM_CMA_FOPS(dpu_drm_driver_fops);
> > > +
> > > +static struct drm_driver dpu_drm_driver = {
> > > + .driver_features = DRIVER_MODESET | DRIVER_GEM |
> > > + DRIVER_ATOMIC,
> > > + DRM_GEM_CMA_DRIVER_OPS,
> > > + .fops = &dpu_drm_driver_fops,
> > > + .name = "imx-dpu",
> > > + .desc = "i.MX DPU DRM graphics",
> > > + .date = "20200805",
> > > + .major = 1,
> > > + .minor = 0,
> > > + .patchlevel = 0,
> > > +};
> > > +
> > > +static int dpu_drm_bind(struct device *dev)
> > > +{
> > > + struct dpu_drm_device *dpu_drm;
> > > + struct drm_device *drm;
> > > + struct dpu_drm_drv_data *drv_data = dev_get_drvdata(dev);
> > > + int ret;
> > > +
> > > + dpu_drm = devm_drm_dev_alloc(dev, &dpu_drm_driver,
> > > + struct dpu_drm_device, base);
> > > + if (IS_ERR(dpu_drm)) {
> > > + ret = PTR_ERR(dpu_drm);
> > > + DRM_DEV_ERROR(dev, "failed to alloc drm device: %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + drm = &dpu_drm->base;
> > > +
> > > + drm->irq_enabled = true;
> > > +
> > > + ret = dpu_kms_prepare(dpu_drm, &drv_data->crtc_np_list);
> > > + if (ret) {
> > > + if (ret != -EPROBE_DEFER)
> > > + DRM_DEV_ERROR(dev, "failed to prepare kms: %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + ret = component_bind_all(dev, dpu_drm);
> > > + if (ret) {
> > > + if (ret != -EPROBE_DEFER)
> > > + DRM_DEV_ERROR(dev,
> > > + "failed to bind all components: %d\n",
> > > + ret);
> > > + return ret;
> > > + }
> > > +
> > > + drm_mode_config_reset(drm);
> > > +
> > > + drm_kms_helper_poll_init(drm);
> > > +
> > > + ret = drm_dev_register(drm, 0);
> > > + if (ret) {
> > > + DRM_DEV_ERROR(dev, "failed to register drm device: %d\n", ret);
> > > + goto out_register;
> > > + }
> > > +
> > > + if (legacyfb_depth != 16 && legacyfb_depth != 32) {
> > > + DRM_DEV_INFO(dev,
> > > + "Invalid legacyfb_depth. Defaulting to 32bpp\n");
> > > + legacyfb_depth = 32;
> > > + }
> > > +
> > > + drm_fbdev_generic_setup(drm, legacyfb_depth);
> > > +
> > > + dev_set_drvdata(dev, drm);
> > > +
> > > + return ret;
> > > +
> > > +out_register:
> > > + drm_kms_helper_poll_fini(drm);
> > > + component_unbind_all(dev, NULL);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void dpu_drm_unbind(struct device *dev)
> > > +{
> > > + struct drm_device *drm = dev_get_drvdata(dev);
> > > +
> > > + drm_dev_unregister(drm);
> > > +
> > > + drm_kms_helper_poll_fini(drm);
> > > +
> > > + drm_atomic_helper_shutdown(drm);
> > > +
> > > + component_unbind_all(drm->dev, NULL);
> > > +
> > > + dev_set_drvdata(dev, NULL);
> > > +}
> > > +
> > > +static const struct component_master_ops dpu_drm_ops = {
> > > + .bind = dpu_drm_bind,
> > > + .unbind = dpu_drm_unbind,
> > > +};
> > > +
> > > +static int compare_of(struct device *dev, void *data)
> > > +{
> > > + struct device_node *np = data;
> > > +
> > > + return dev->of_node == np;
> > > +}
> > > +
> > > +static int dpu_drm_probe(struct platform_device *pdev)
> > > +{
> > > + struct device *dev = &pdev->dev;
> > > + struct component_match *match = NULL;
> > > + struct device_node *np, *ports, *port;
> > > + struct dpu_drm_drv_data *drv_data;
> > > + struct dpu_crtc_of_node *crtc_of_node;
> > > +
> > > + drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
> > > + if (!drv_data) {
> > > + DRM_DEV_ERROR(dev, "failed to alloc driver data\n");
> > > + return -ENOMEM;
> > > + }
> > > +
> > > + INIT_LIST_HEAD(&drv_data->crtc_np_list);
> > > +
> > > + for_each_matching_node(np, dpu_dt_ids) {
> > > + if (!of_device_is_available(np))
> > > + continue;
> > > +
> > > + ports = of_get_child_by_name(np, "ports");
> > > + if (!ports)
> > > + ports = np;
> > > +
> > > + for_each_child_of_node(ports, port) {
> > > + drm_of_component_match_add(dev, &match, compare_of,
> > > + port);
> > > +
> > > + crtc_of_node = devm_kzalloc(dev, sizeof(*crtc_of_node),
> > > + GFP_KERNEL);
> > > + if (!crtc_of_node) {
> > > + DRM_DEV_ERROR(dev,
> > > + "failed to alloc crtc_of_node\n");
> >
> > I think you're missing an of_node_put(ports) here.
>
> Will add it in v2.
>
> >
> > > + return -ENOMEM;
> > > + }
> > > +
> > > + crtc_of_node->np = port;
> > > +
> > > + list_add(&crtc_of_node->list, &drv_data->crtc_np_list);
> > > + }
> > > +
> > > + of_node_put(ports);
> > > + }
> > > +
> > > + if (!match) {
> > > + DRM_DEV_ERROR(dev, "no available DPU display output port\n");
> > > + return -ENODEV;
> > > + }
> > > +
> > > + dev_set_drvdata(dev, drv_data);
> > > +
> > > + return component_master_add_with_match(dev, &dpu_drm_ops, match);
> > > +}
> > > +
> > > +static int dpu_drm_remove(struct platform_device *pdev)
> > > +{
> > > + component_master_del(&pdev->dev, &dpu_drm_ops);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int __maybe_unused dpu_drm_suspend(struct device *dev)
> > > +{
> > > + struct drm_device *drm_dev = dev_get_drvdata(dev);
> > > +
> > > + return drm_mode_config_helper_suspend(drm_dev);
> > > +}
> > > +
> > > +static int __maybe_unused dpu_drm_resume(struct device *dev)
> > > +{
> > > + struct drm_device *drm_dev = dev_get_drvdata(dev);
> > > +
> > > + return drm_mode_config_helper_resume(drm_dev);
> > > +}
> > > +
> > > +static SIMPLE_DEV_PM_OPS(dpu_drm_pm_ops, dpu_drm_suspend, dpu_drm_resume);
> > > +
> > > +static struct platform_driver dpu_drm_platform_driver = {
> > > + .probe = dpu_drm_probe,
> > > + .remove = dpu_drm_remove,
> > > + .driver = {
> > > + .name = DRIVER_NAME,
> > > + .pm = &dpu_drm_pm_ops,
> > > + },
> > > +};
> > > +
> > > +static struct platform_device *dpu_drm_platform_dev;
> > > +
> > > +static struct platform_driver * const drivers[] = {
> > > + &dpu_prg_driver,
> > > + &dpu_dprc_driver,
> > > + &dpu_core_driver,
> > > + &dpu_crtc_driver,
> > > + &dpu_drm_platform_driver,
> > > +};
> > > +
> > > +static int __init dpu_init(void)
> > > +{
> > > + struct platform_device *pdev;
> > > + struct device_node *np;
> > > + int ret;
> > > +
> > > + ret = platform_register_drivers(drivers, ARRAY_SIZE(drivers));
> > > + if (ret)
> > > + return ret;
> > > +
> > > + /*
> > > + * If the DT contains at least one available DPU device, instantiate
> > > + * the DRM platform device.
> > > + */
> > > + for_each_matching_node(np, dpu_dt_ids) {
> > > + if (!of_device_is_available(np))
> > > + continue;
> > > +
> > > + pdev = platform_device_alloc(DRIVER_NAME, -1);
> > > + if (!pdev) {
> > > + ret = -ENOMEM;
> > > + goto unregister_drivers;
> > > + }
> > > +
> > > + ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
> > > + if (ret)
> > > + goto unregister_drivers;
> > > +
> > > + ret = platform_device_add(pdev);
> > > + if (ret) {
> > > + platform_device_put(pdev);
> > > + goto unregister_drivers;
> > > + }
> > > +
> > > + dpu_drm_platform_dev = pdev;
> > > + of_node_put(np);
> > > + break;
> > > + }
> > > +
> > > + return ret;
> > > +
> > > +unregister_drivers:
> > > + of_node_put(np);
> > > + platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
> > > + return ret;
> > > +}
> > > +module_init(dpu_init);
> > > +
> > > +static void __exit dpu_exit(void)
> > > +{
> > > + platform_device_unregister(dpu_drm_platform_dev);
> > > + platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
> > > +}
> > > +module_exit(dpu_exit);
> > > +
> > > +MODULE_DESCRIPTION("i.MX DPU DRM Driver");
> > > +MODULE_AUTHOR("Liu Ying <victor.liu@xxxxxxx>");
> > > +MODULE_ALIAS("platform:" DRIVER_NAME);
> > > +MODULE_LICENSE("GPL v2");
> >
> > [...]
> >
> > > diff --git a/drivers/gpu/drm/imx/dpu/dpu-prg.c b/drivers/gpu/drm/imx/dpu/dpu-prg.c
> > > new file mode 100644
> > > index 00000000..d9bbfc5
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/imx/dpu/dpu-prg.c
> > > @@ -0,0 +1,389 @@
> > > +// SPDX-License-Identifier: GPL-2.0+
> > > +
> > > +/*
> > > + * Copyright 2017-2020 NXP
> > > + */
> > > +
> > > +#include <linux/bitops.h>
> > > +#include <linux/clk.h>
> > > +#include <linux/delay.h>
> > > +#include <linux/io.h>
> > > +#include <linux/kernel.h>
> > > +#include <linux/module.h>
> > > +#include <linux/of.h>
> > > +#include <linux/of_device.h>
> > > +#include <linux/platform_device.h>
> > > +#include <linux/pm_runtime.h>
> > > +
> > > +#include "dpu-prg.h"
> > > +
> > > +#define SET 0x4
> > > +#define CLR 0x8
> > > +#define TOG 0xc
> > > +
> > > +#define PRG_CTRL 0x00
> > > +#define BYPASS BIT(0)
> > > +#define SC_DATA_TYPE_8BIT 0
> > > +#define SC_DATA_TYPE_10BIT BIT(2)
> > > +#define UV_EN BIT(3)
> > > +#define HANDSHAKE_MODE_4LINES 0
> > > +#define HANDSHAKE_MODE_8LINES BIT(4)
> > > +#define SHADOW_LOAD_MODE BIT(5)
> > > +#define DES_DATA_TYPE_32BPP (0 << 16)
> > > +#define DES_DATA_TYPE_24BPP (1 << 16)
> > > +#define DES_DATA_TYPE_16BPP (2 << 16)
> > > +#define DES_DATA_TYPE_8BPP (3 << 16)
> > > +#define SOFTRST BIT(30)
> > > +#define SHADOW_EN BIT(31)
> > > +
> > > +#define PRG_STATUS 0x10
> > > +#define BUFFER_VALID_B BIT(1)
> > > +#define BUFFER_VALID_A BIT(0)
> > > +
> > > +#define PRG_REG_UPDATE 0x20
> > > +#define REG_UPDATE BIT(0)
> > > +
> > > +#define PRG_STRIDE 0x30
> > > +#define STRIDE(n) (((n) - 1) & 0xffff)
> > > +
> > > +#define PRG_HEIGHT 0x40
> > > +#define HEIGHT(n) (((n) - 1) & 0xffff)
> > > +
> > > +#define PRG_BADDR 0x50
> > > +
> > > +#define PRG_OFFSET 0x60
> > > +#define Y(n) (((n) & 0x7) << 16)
> > > +#define X(n) ((n) & 0xffff)
> > > +
> > > +#define PRG_WIDTH 0x70
> > > +#define WIDTH(n) (((n) - 1) & 0xffff)
> > > +
> > > +#define DPU_PRG_MAX_STRIDE 0x10000
> > > +
> > > +struct dpu_prg {
> > > + struct device *dev;
> > > + void __iomem *base;
> > > + struct list_head list;
> > > + struct clk *clk_apb;
> > > + struct clk *clk_rtram;
> > > + bool is_auxiliary;
> > > +};
> > > +
> > > +static DEFINE_MUTEX(dpu_prg_list_mutex);
> > > +static LIST_HEAD(dpu_prg_list);
> > > +
> > > +static inline u32 dpu_prg_read(struct dpu_prg *prg, unsigned int offset)
> > > +{
> > > + return readl(prg->base + offset);
> > > +}
> > > +
> > > +static inline void
> > > +dpu_prg_write(struct dpu_prg *prg, unsigned int offset, u32 value)
> > > +{
> > > + writel(value, prg->base + offset);
> > > +}
> > > +
> > > +static void dpu_prg_reset(struct dpu_prg *prg)
> > > +{
> > > + usleep_range(10, 20);
> > > + dpu_prg_write(prg, PRG_CTRL + SET, SOFTRST);
> > > + usleep_range(10, 20);
> > > + dpu_prg_write(prg, PRG_CTRL + CLR, SOFTRST);
> > > +}
> > > +
> > > +void dpu_prg_enable(struct dpu_prg *prg)
> > > +{
> > > + dpu_prg_write(prg, PRG_CTRL + CLR, BYPASS);
> > > +}
> > > +
> > > +void dpu_prg_disable(struct dpu_prg *prg)
> > > +{
> > > + dpu_prg_write(prg, PRG_CTRL, BYPASS);
> > > +}
> > > +
> > > +static int dpu_prg_stride_fixup(struct dpu_prg *prg,
> > > + unsigned int width, unsigned int x_offset,
> > > + unsigned int bits_per_pixel, u64 modifier,
> > > + unsigned int *stride, dma_addr_t baddr)
> > > +{
> > > + unsigned int burst_size;
> > > + unsigned int mt_w = 0; /* micro-tile width */
> > > +
> > > + /* prg finer cropping into micro-tile block - top/left start point */
> > > + switch (modifier) {
> > > + case DRM_FORMAT_MOD_NONE:
> > > + break;
> > > + case DRM_FORMAT_MOD_VIVANTE_TILED:
> > > + case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
> > > + mt_w = (bits_per_pixel == 16) ? 8 : 4;
> > > + break;
> > > + default:
> > > + dev_err(prg->dev, "unsupported modifier 0x%016llx\n", modifier);
> > > + return -EINVAL;
> > > + }
> > > +
> > > + if (modifier) {
> > > + x_offset %= mt_w;
> > > +
> > > + /* consider x offset to calculate stride */
> > > + baddr += x_offset * (bits_per_pixel / 8);
> > > + }
> > > +
> > > + /*
> > > + * address TKT343664:
> > > + * fetch unit base address has to align to burst size
> > > + */
> > > + burst_size = 1 << __ffs(baddr);
> > > + burst_size = round_up(burst_size, 8);
> > > + burst_size = min(burst_size, 128U);
> > > +
> > > + /*
> > > + * address TKT339017:
> > > + * fixup for mismatch between burst size and stride
> > > + */
> > > + if (modifier)
> > > + *stride = round_up(*stride + round_up(baddr % 8, 8),
> > > + burst_size);
> > > + else
> > > + *stride = round_up(*stride, burst_size);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +void dpu_prg_configure(struct dpu_prg *prg,
> > > + unsigned int width, unsigned int height,
> > > + unsigned int x_offset, unsigned int y_offset,
> > > + unsigned int stride, unsigned int bits_per_pixel,
> > > + dma_addr_t baddr,
> > > + const struct drm_format_info *format, u64 modifier,
> > > + bool start)
> > > +{
> > > + unsigned int burst_size;
> > > + u32 val;
> > > + int ret;
> > > +
> > > + ret = dpu_prg_stride_fixup(prg, width, x_offset, bits_per_pixel,
> > > + modifier, &stride, baddr);
> > > + if (ret)
> > > + return;
> > > +
> > > + /*
> > > + * address TKT342628(part 1):
> > > + * when prg stride is less or equals to burst size,
> > > + * the auxiliary prg height needs to be a half
> > > + */
> > > + if (prg->is_auxiliary && stride <= burst_size) {
> >
> > It looks like burst_size is used uninitialized... Or am I missing something?
>
> You're right. Will fix this in v2.
>
> Thanks,
> Liu Ying
>
> >
> > Thanks,
> > Laurentiu
> >
> > > + height /= 2;
> > > + if (modifier)
> > > + y_offset /= 2;
> > > + }
> > > +
> > > + dpu_prg_write(prg, PRG_STRIDE, STRIDE(stride));
> > > + dpu_prg_write(prg, PRG_WIDTH, WIDTH(width));
> > > + dpu_prg_write(prg, PRG_HEIGHT, HEIGHT(height));
> > > + dpu_prg_write(prg, PRG_OFFSET, X(x_offset) | Y(y_offset));
> > > + dpu_prg_write(prg, PRG_BADDR, baddr);
> > > +
> > > + val = SHADOW_LOAD_MODE | SC_DATA_TYPE_8BIT | BYPASS;
> > > + if (format->format == DRM_FORMAT_NV21 ||
> > > + format->format == DRM_FORMAT_NV12) {
> > > + val |= HANDSHAKE_MODE_8LINES;
> > > + /*
> > > + * address TKT342628(part 2):
> > > + * when prg stride is less or equals to burst size,
> > > + * we disable UV_EN bit for the auxiliary prg
> > > + */
> > > + if (prg->is_auxiliary && stride > burst_size)
> > > + val |= UV_EN;
> > > + } else {
> > > + val |= HANDSHAKE_MODE_4LINES;
> > > + }
> > > + switch (bits_per_pixel) {
> > > + case 32:
> > > + val |= DES_DATA_TYPE_32BPP;
> > > + break;
> > > + case 24:
> > > + val |= DES_DATA_TYPE_24BPP;
> > > + break;
> > > + case 16:
> > > + val |= DES_DATA_TYPE_16BPP;
> > > + break;
> > > + case 8:
> > > + val |= DES_DATA_TYPE_8BPP;
> > > + break;
> > > + }
> > > + /* no shadow for the first frame */
> > > + if (!start)
> > > + val |= SHADOW_EN;
> > > + dpu_prg_write(prg, PRG_CTRL, val);
> > > +}
> > > +
> > > +void dpu_prg_reg_update(struct dpu_prg *prg)
> > > +{
> > > + dpu_prg_write(prg, PRG_REG_UPDATE, REG_UPDATE);
> > > +}
> > > +
> > > +void dpu_prg_shadow_enable(struct dpu_prg *prg)
> > > +{
> > > + dpu_prg_write(prg, PRG_CTRL + SET, SHADOW_EN);
> > > +}
> > > +
> > > +bool dpu_prg_stride_supported(struct dpu_prg *prg,
> > > + unsigned int width, unsigned int x_offset,
> > > + unsigned int bits_per_pixel, u64 modifier,
> > > + unsigned int stride, dma_addr_t baddr)
> > > +{
> > > + int ret;
> > > +
> > > + ret = dpu_prg_stride_fixup(prg, width, x_offset, bits_per_pixel,
> > > + modifier, &stride, baddr);
> > > + if (ret)
> > > + return false;
> > > +
> > > + if (stride > DPU_PRG_MAX_STRIDE)
> > > + return false;
> > > +
> > > + return true;
> > > +}
> > > +
> > > +void dpu_prg_set_auxiliary(struct dpu_prg *prg)
> > > +{
> > > + prg->is_auxiliary = true;
> > > +}
> > > +
> > > +void dpu_prg_set_primary(struct dpu_prg *prg)
> > > +{
> > > + prg->is_auxiliary = false;
> > > +}
> > > +
> > > +struct dpu_prg *
> > > +dpu_prg_lookup_by_phandle(struct device *dev, const char *name, int index)
> > > +{
> > > + struct device_node *prg_node = of_parse_phandle(dev->of_node,
> > > + name, index);
> > > + struct dpu_prg *prg;
> > > +
> > > + mutex_lock(&dpu_prg_list_mutex);
> > > + list_for_each_entry(prg, &dpu_prg_list, list) {
> > > + if (prg_node == prg->dev->of_node) {
> > > + mutex_unlock(&dpu_prg_list_mutex);
> > > + device_link_add(dev, prg->dev,
> > > + DL_FLAG_PM_RUNTIME |
> > > + DL_FLAG_AUTOREMOVE_CONSUMER);
> > > + return prg;
> > > + }
> > > + }
> > > + mutex_unlock(&dpu_prg_list_mutex);
> > > +
> > > + return NULL;
> > > +}
> > > +
> > > +static const struct of_device_id dpu_prg_dt_ids[] = {
> > > + { .compatible = "fsl,imx8qm-prg", },
> > > + { .compatible = "fsl,imx8qxp-prg", },
> > > + { /* sentinel */ },
> > > +};
> > > +
> > > +static int dpu_prg_probe(struct platform_device *pdev)
> > > +{
> > > + struct device *dev = &pdev->dev;
> > > + struct resource *res;
> > > + struct dpu_prg *prg;
> > > + int ret;
> > > +
> > > + prg = devm_kzalloc(dev, sizeof(*prg), GFP_KERNEL);
> > > + if (!prg)
> > > + return -ENOMEM;
> > > +
> > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > + prg->base = devm_ioremap_resource(&pdev->dev, res);
> > > + if (IS_ERR(prg->base))
> > > + return PTR_ERR(prg->base);
> > > +
> > > + prg->clk_apb = devm_clk_get(dev, "apb");
> > > + if (IS_ERR(prg->clk_apb)) {
> > > + ret = PTR_ERR(prg->clk_apb);
> > > + dev_err_probe(dev, ret, "failed to get apb clock\n");
> > > + return ret;
> > > + }
> > > +
> > > + prg->clk_rtram = devm_clk_get(dev, "rtram");
> > > + if (IS_ERR(prg->clk_rtram)) {
> > > + ret = PTR_ERR(prg->clk_rtram);
> > > + dev_err_probe(dev, ret, "failed to get rtram clock\n");
> > > + return ret;
> > > + }
> > > +
> > > + prg->dev = dev;
> > > + platform_set_drvdata(pdev, prg);
> > > +
> > > + pm_runtime_enable(dev);
> > > +
> > > + mutex_lock(&dpu_prg_list_mutex);
> > > + list_add(&prg->list, &dpu_prg_list);
> > > + mutex_unlock(&dpu_prg_list_mutex);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int dpu_prg_remove(struct platform_device *pdev)
> > > +{
> > > + struct dpu_prg *prg = platform_get_drvdata(pdev);
> > > +
> > > + mutex_lock(&dpu_prg_list_mutex);
> > > + list_del(&prg->list);
> > > + mutex_unlock(&dpu_prg_list_mutex);
> > > +
> > > + pm_runtime_disable(&pdev->dev);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int __maybe_unused dpu_prg_runtime_suspend(struct device *dev)
> > > +{
> > > + struct platform_device *pdev = to_platform_device(dev);
> > > + struct dpu_prg *prg = platform_get_drvdata(pdev);
> > > +
> > > + clk_disable_unprepare(prg->clk_rtram);
> > > + clk_disable_unprepare(prg->clk_apb);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static int __maybe_unused dpu_prg_runtime_resume(struct device *dev)
> > > +{
> > > + struct platform_device *pdev = to_platform_device(dev);
> > > + struct dpu_prg *prg = platform_get_drvdata(pdev);
> > > + int ret;
> > > +
> > > + ret = clk_prepare_enable(prg->clk_apb);
> > > + if (ret) {
> > > + dev_err(dev, "failed to enable apb clock: %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + ret = clk_prepare_enable(prg->clk_rtram);
> > > + if (ret) {
> > > + dev_err(dev, "failed to enable rtramclock: %d\n", ret);
> > > + return ret;
> > > + }
> > > +
> > > + dpu_prg_reset(prg);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static const struct dev_pm_ops dpu_prg_pm_ops = {
> > > + SET_RUNTIME_PM_OPS(dpu_prg_runtime_suspend,
> > > + dpu_prg_runtime_resume, NULL)
> > > +};
> > > +
> > > +struct platform_driver dpu_prg_driver = {
> > > + .probe = dpu_prg_probe,
> > > + .remove = dpu_prg_remove,
> > > + .driver = {
> > > + .pm = &dpu_prg_pm_ops,
> > > + .name = "dpu-prg",
> > > + .of_match_table = dpu_prg_dt_ids,
> > > + },
> > > +};
>

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