Re: [PATCH 6/7] drm/exynos/decon5433: use mode info stored in CRTC to detect i80 mode

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On 01.08.2017 12:02, Inki Dae wrote:
> Seems you mixed some different changes below with one patch.
>
> 1. add checking panel mode with i80_mode.
> 2. change te_irq to irq_te.
> 3. add new function, decon_atomic_check. 
> 4. add considering more error cases in decon_conf_irq function.
> 5. register command and video mode interrupt handlers regardless of panel mode.
>
> And the subject of this patch doesn't say everything to above changes.

I will try to split these changes into smaller patches. Moreover since
recent introduction of mode_valid callback for crtc I will drop
atomic_check in favor of it.

Regards
Andrzej

>
> Thanks,
> Inki Dae
>
> 2017년 04월 18일 21:40에 Andrzej Hajda 이(가) 쓴 글:
>> Since panel's mode of work is propagated properly from panel to DECON,
>> there is no need to use redundant private property. The only issue with
>> such approach is that check for required interrupts should be postponed
>> until panel communicate its requirements - ie to atomic_check.
>>
>> Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
>> ---
>>  drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 98 ++++++++++++++++-----------
>>  1 file changed, 57 insertions(+), 41 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
>> index 237b4c9..7a09e03 100644
>> --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
>> +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
>> @@ -34,9 +34,8 @@
>>  #define WINDOWS_NR	3
>>  #define MIN_FB_WIDTH_FOR_16WORD_BURST	128
>>  
>> -#define IFTYPE_I80	(1 << 0)
>> -#define I80_HW_TRG	(1 << 1)
>> -#define IFTYPE_HDMI	(1 << 2)
>> +#define I80_HW_TRG	(1 << 0)
>> +#define IFTYPE_HDMI	(1 << 1)
>>  
>>  static const char * const decon_clks_name[] = {
>>  	"pclk",
>> @@ -58,7 +57,9 @@ struct decon_context {
>>  	struct regmap			*sysreg;
>>  	struct clk			*clks[ARRAY_SIZE(decon_clks_name)];
>>  	unsigned int			irq;
>> -	unsigned int			te_irq;
>> +	unsigned int			irq_vsync;
>> +	unsigned int			irq_lcd_sys;
>> +	unsigned int			irq_te;
>>  	unsigned long			out_type;
>>  	int				first_win;
>>  	spinlock_t			vblank_lock;
>> @@ -91,7 +92,7 @@ static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
>>  	u32 val;
>>  
>>  	val = VIDINTCON0_INTEN;
>> -	if (ctx->out_type & IFTYPE_I80)
>> +	if (crtc->i80_mode)
>>  		val |= VIDINTCON0_FRAMEDONE;
>>  	else
>>  		val |= VIDINTCON0_INTFRMEN | VIDINTCON0_FRAMESEL_FP;
>> @@ -100,7 +101,7 @@ static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
>>  
>>  	enable_irq(ctx->irq);
>>  	if (!(ctx->out_type & I80_HW_TRG))
>> -		enable_irq(ctx->te_irq);
>> +		enable_irq(ctx->irq_te);
>>  
>>  	return 0;
>>  }
>> @@ -110,7 +111,7 @@ static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
>>  	struct decon_context *ctx = crtc->ctx;
>>  
>>  	if (!(ctx->out_type & I80_HW_TRG))
>> -		disable_irq_nosync(ctx->te_irq);
>> +		disable_irq_nosync(ctx->irq_te);
>>  	disable_irq_nosync(ctx->irq);
>>  
>>  	writel(0, ctx->addr + DECON_VIDINTCON0);
>> @@ -140,7 +141,7 @@ static u32 decon_get_frame_count(struct decon_context *ctx, bool end)
>>  
>>  	switch (status & (VIDCON1_VSTATUS_MASK | VIDCON1_I80_ACTIVE)) {
>>  	case VIDCON1_VSTATUS_VS:
>> -		if (!(ctx->out_type & IFTYPE_I80))
>> +		if (!(ctx->crtc->i80_mode))
>>  			--frm;
>>  		break;
>>  	case VIDCON1_VSTATUS_BP:
>> @@ -167,7 +168,7 @@ static u32 decon_get_vblank_counter(struct exynos_drm_crtc *crtc)
>>  
>>  static void decon_setup_trigger(struct decon_context *ctx)
>>  {
>> -	if (!(ctx->out_type & (IFTYPE_I80 | I80_HW_TRG)))
>> +	if (!ctx->crtc->i80_mode && !(ctx->out_type & I80_HW_TRG))
>>  		return;
>>  
>>  	if (!(ctx->out_type & I80_HW_TRG)) {
>> @@ -207,7 +208,7 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
>>  	val = VIDOUT_LCD_ON;
>>  	if (interlaced)
>>  		val |= VIDOUT_INTERLACE_EN_F;
>> -	if (ctx->out_type & IFTYPE_I80) {
>> +	if (crtc->i80_mode) {
>>  		val |= VIDOUT_COMMAND_IF;
>>  	} else {
>>  		val |= VIDOUT_RGB_IF;
>> @@ -223,7 +224,7 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
>>  			VIDTCON2_HOZVAL(m->hdisplay - 1);
>>  	writel(val, ctx->addr + DECON_VIDTCON2);
>>  
>> -	if (!(ctx->out_type & IFTYPE_I80)) {
>> +	if (!crtc->i80_mode) {
>>  		int vbp = m->crtc_vtotal - m->crtc_vsync_end;
>>  		int vfp = m->crtc_vsync_start - m->crtc_vdisplay;
>>  
>> @@ -456,7 +457,7 @@ static void decon_disable(struct exynos_drm_crtc *crtc)
>>  	int i;
>>  
>>  	if (!(ctx->out_type & I80_HW_TRG))
>> -		synchronize_irq(ctx->te_irq);
>> +		synchronize_irq(ctx->irq_te);
>>  	synchronize_irq(ctx->irq);
>>  
>>  	/*
>> @@ -511,6 +512,22 @@ static void decon_clear_channels(struct exynos_drm_crtc *crtc)
>>  		clk_disable_unprepare(ctx->clks[i]);
>>  }
>>  
>> +static int decon_atomic_check(struct exynos_drm_crtc *crtc,
>> +		struct drm_crtc_state *state)
>> +{
>> +	struct decon_context *ctx = crtc->ctx;
>> +
>> +	ctx->irq = crtc->i80_mode ? ctx->irq_lcd_sys : ctx->irq_vsync;
>> +
>> +	if (ctx->irq)
>> +		return 0;
>> +
>> +	dev_err(ctx->dev, "Panel requires %s mode, but appropriate interrupt is not provided.\n",
>> +			crtc->i80_mode ? "command" : "video");
>> +
>> +	return -EINVAL;
>> +}
>> +
>>  static const struct exynos_drm_crtc_ops decon_crtc_ops = {
>>  	.enable			= decon_enable,
>>  	.disable		= decon_disable,
>> @@ -521,6 +538,7 @@ static const struct exynos_drm_crtc_ops decon_crtc_ops = {
>>  	.update_plane		= decon_update_plane,
>>  	.disable_plane		= decon_disable_plane,
>>  	.atomic_flush		= decon_atomic_flush,
>> +	.atomic_check		= decon_atomic_check,
>>  };
>>  
>>  static int decon_bind(struct device *dev, struct device *master, void *data)
>> @@ -670,19 +688,22 @@ static const struct of_device_id exynos5433_decon_driver_dt_match[] = {
>>  MODULE_DEVICE_TABLE(of, exynos5433_decon_driver_dt_match);
>>  
>>  static int decon_conf_irq(struct decon_context *ctx, const char *name,
>> -		irq_handler_t handler, unsigned long int flags, bool required)
>> +		irq_handler_t handler, unsigned long int flags)
>>  {
>>  	struct platform_device *pdev = to_platform_device(ctx->dev);
>>  	int ret, irq = platform_get_irq_byname(pdev, name);
>>  
>>  	if (irq < 0) {
>> -		if (irq == -EPROBE_DEFER)
>> +		switch (irq) {
>> +		case -EPROBE_DEFER:
>> +			return irq;
>> +		case -ENODATA:
>> +		case -ENXIO:
>> +			return 0;
>> +		default:
>> +			dev_err(ctx->dev, "IRQ %s get failed, %d\n", name, irq);
>>  			return irq;
>> -		if (required)
>> -			dev_err(ctx->dev, "cannot get %s IRQ\n", name);
>> -		else
>> -			irq = 0;
>> -		return irq;
>> +		}
>>  	}
>>  	irq_set_status_flags(irq, IRQ_NOAUTOEN);
>>  	ret = devm_request_irq(ctx->dev, irq, handler, flags, "drm_decon", ctx);
>> @@ -710,11 +731,8 @@ static int exynos5433_decon_probe(struct platform_device *pdev)
>>  	ctx->out_type = (unsigned long)of_device_get_match_data(dev);
>>  	spin_lock_init(&ctx->vblank_lock);
>>  
>> -	if (ctx->out_type & IFTYPE_HDMI) {
>> +	if (ctx->out_type & IFTYPE_HDMI)
>>  		ctx->first_win = 1;
>> -	} else if (of_get_child_by_name(dev->of_node, "i80-if-timings")) {
>> -		ctx->out_type |= IFTYPE_I80;
>> -	}
>>  
>>  	for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
>>  		struct clk *clk;
>> @@ -738,25 +756,23 @@ static int exynos5433_decon_probe(struct platform_device *pdev)
>>  		return PTR_ERR(ctx->addr);
>>  	}
>>  
>> -	if (ctx->out_type & IFTYPE_I80) {
>> -		ret = decon_conf_irq(ctx, "lcd_sys", decon_irq_handler, 0, true);
>> -		if (ret < 0)
>> -			return ret;
>> -		ctx->irq = ret;
>> +	ret = decon_conf_irq(ctx, "vsync", decon_irq_handler, 0);
>> +	if (ret < 0)
>> +		return ret;
>> +	ctx->irq_vsync = ret;
>>  
>> -		ret = decon_conf_irq(ctx, "te", decon_te_irq_handler,
>> -				     IRQF_TRIGGER_RISING, false);
>> -		if (ret < 0)
>> -			return ret;
>> -		if (ret) {
>> -			ctx->te_irq = ret;
>> -			ctx->out_type &= ~I80_HW_TRG;
>> -		}
>> -	} else {
>> -		ret = decon_conf_irq(ctx, "vsync", decon_irq_handler, 0, true);
>> -		if (ret < 0)
>> -			return ret;
>> -		ctx->irq = ret;
>> +	ret = decon_conf_irq(ctx, "lcd_sys", decon_irq_handler, 0);
>> +	if (ret < 0)
>> +		return ret;
>> +	ctx->irq_lcd_sys = ret;
>> +
>> +	ret = decon_conf_irq(ctx, "te", decon_te_irq_handler,
>> +			IRQF_TRIGGER_RISING);
>> +	if (ret < 0)
>> +		return ret;
>> +	if (ret) {
>> +		ctx->irq_te = ret;
>> +		ctx->out_type &= ~I80_HW_TRG;
>>  	}
>>  
>>  	if (ctx->out_type & I80_HW_TRG) {
>>
>

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