Re: [PATCH 3/3] drm/exynos: decon: clean up interface type

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Hi Inki,

On 04/05/2016 10:27 AM, Inki Dae wrote:
> This patch cleans up interface type relevant codes.
> 
> Trigger mode is determinded only by i80 mode, which isn't
> related to Display types - HDMI or Display controller.
> So this patch makes the trigger mode to be set only in case of
> i80 mode.

With this patch HDMI path image has serious synchronization problems.
Exynos5433 documentation says that HDMI Timing Generator generates VSYNC
signal which works as a hardware trigger for DECON-TV, so I guess
trigger is required.

Btw, I think it could be good to remove suffixes I80_RGV from
TRIGCON_HWTRIGEN_I80_RGB and TRIGCON_HWTRIGMASK_I80_RGB - they are
misleading and differ from documentation.

As far as I have tested I80 mode works OK on Decon5433.

Regards
Andrzej

> 
> Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx>
> ---
>  drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 53 ++++++++++++++-------------
>  1 file changed, 27 insertions(+), 26 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> index 5245bc5..5922e99 100644
> --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> @@ -28,6 +28,10 @@
>  #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)
> +
>  static const char * const decon_clks_name[] = {
>  	"pclk",
>  	"aclk_decon",
> @@ -38,12 +42,6 @@ static const char * const decon_clks_name[] = {
>  	"sclk_decon_eclk",
>  };
>  
> -enum decon_iftype {
> -	IFTYPE_RGB,
> -	IFTYPE_I80,
> -	IFTYPE_HDMI
> -};
> -
>  enum decon_flag_bits {
>  	BIT_CLKS_ENABLED,
>  	BIT_IRQS_ENABLED,
> @@ -61,7 +59,7 @@ struct decon_context {
>  	struct clk			*clks[ARRAY_SIZE(decon_clks_name)];
>  	int				pipe;
>  	unsigned long			flags;
> -	enum decon_iftype		out_type;
> +	unsigned int			out_type;
>  	int				first_win;
>  };
>  
> @@ -95,7 +93,7 @@ static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
>  
>  	if (!test_and_set_bit(BIT_IRQS_ENABLED, &ctx->flags)) {
>  		val = VIDINTCON0_INTEN;
> -		if (ctx->out_type == IFTYPE_I80)
> +		if (ctx->out_type & IFTYPE_I80)
>  			val |= VIDINTCON0_FRAMEDONE;
>  		else
>  			val |= VIDINTCON0_INTFRMEN;
> @@ -119,7 +117,7 @@ static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
>  
>  static void decon_setup_trigger(struct decon_context *ctx)
>  {
> -	u32 val = (ctx->out_type != IFTYPE_HDMI)
> +	u32 val = !(ctx->out_type & I80_HW_TRG)
>  		? TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
>  		  TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN
>  		: TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
> @@ -136,7 +134,7 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
>  	if (test_bit(BIT_SUSPENDED, &ctx->flags))
>  		return;
>  
> -	if (ctx->out_type == IFTYPE_HDMI) {
> +	if (ctx->out_type & IFTYPE_HDMI) {
>  		m->crtc_hsync_start = m->crtc_hdisplay + 10;
>  		m->crtc_hsync_end = m->crtc_htotal - 92;
>  		m->crtc_vsync_start = m->crtc_vdisplay + 1;
> @@ -151,17 +149,20 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
>  
>  	/* lcd on and use command if */
>  	val = VIDOUT_LCD_ON;
> -	if (ctx->out_type == IFTYPE_I80)
> +	if (ctx->out_type & IFTYPE_I80) {
>  		val |= VIDOUT_COMMAND_IF;
> -	else
> +		decon_setup_trigger(ctx);
> +	} else {
>  		val |= VIDOUT_RGB_IF;
> +	}
> +
>  	writel(val, ctx->addr + DECON_VIDOUTCON0);
>  
>  	val = VIDTCON2_LINEVAL(m->vdisplay - 1) |
>  		VIDTCON2_HOZVAL(m->hdisplay - 1);
>  	writel(val, ctx->addr + DECON_VIDTCON2);
>  
> -	if (ctx->out_type != IFTYPE_I80) {
> +	if (!(ctx->out_type & IFTYPE_I80)) {
>  		val = VIDTCON00_VBPD_F(
>  				m->crtc_vtotal - m->crtc_vsync_end - 1) |
>  			VIDTCON00_VFPD_F(
> @@ -183,8 +184,6 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
>  		writel(val, ctx->addr + DECON_VIDTCON11);
>  	}
>  
> -	decon_setup_trigger(ctx);
> -
>  	/* enable output and display signal */
>  	decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
>  }
> @@ -300,7 +299,7 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
>  	val = dma_addr + pitch * state->src.h;
>  	writel(val, ctx->addr + DECON_VIDW0xADD1B0(win));
>  
> -	if (ctx->out_type != IFTYPE_HDMI)
> +	if (!(ctx->out_type & IFTYPE_HDMI))
>  		val = BIT_VAL(pitch - state->crtc.w * bpp, 27, 14)
>  			| BIT_VAL(state->crtc.w * bpp, 13, 0);
>  	else
> @@ -348,7 +347,7 @@ static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
>  	for (i = ctx->first_win; i < WINDOWS_NR; i++)
>  		decon_shadow_protect_win(ctx, i, false);
>  
> -	if (ctx->out_type == IFTYPE_I80)
> +	if (ctx->out_type & IFTYPE_I80)
>  		set_bit(BIT_WIN_UPDATED, &ctx->flags);
>  }
>  
> @@ -374,7 +373,7 @@ static void decon_swreset(struct decon_context *ctx)
>  
>  	WARN(tries == 0, "failed to software reset DECON\n");
>  
> -	if (ctx->out_type != IFTYPE_HDMI)
> +	if (!(ctx->out_type & IFTYPE_HDMI))
>  		return;
>  
>  	writel(VIDCON0_CLKVALUP | VIDCON0_VLCKFREE, ctx->addr + DECON_VIDCON0);
> @@ -383,7 +382,9 @@ static void decon_swreset(struct decon_context *ctx)
>  	writel(VIDCON1_VCLK_RUN_VDEN_DISABLE, ctx->addr + DECON_VIDCON1);
>  	writel(CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F | CRCCTRL_CRCCLKEN,
>  	       ctx->addr + DECON_CRCCTRL);
> -	decon_setup_trigger(ctx);
> +
> +	if (ctx->out_type & IFTYPE_I80)
> +		decon_setup_trigger(ctx);
>  }
>  
>  static void decon_enable(struct exynos_drm_crtc *crtc)
> @@ -509,7 +510,7 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
>  	}
>  
>  	exynos_plane = &ctx->planes[ctx->first_win];
> -	out_type = (ctx->out_type == IFTYPE_HDMI) ? EXYNOS_DISPLAY_TYPE_HDMI
> +	out_type = (ctx->out_type & IFTYPE_HDMI) ? EXYNOS_DISPLAY_TYPE_HDMI
>  						  : EXYNOS_DISPLAY_TYPE_LCD;
>  	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
>  					ctx->pipe, out_type,
> @@ -617,11 +618,11 @@ static const struct dev_pm_ops exynos5433_decon_pm_ops = {
>  static const struct of_device_id exynos5433_decon_driver_dt_match[] = {
>  	{
>  		.compatible = "samsung,exynos5433-decon",
> -		.data = (void *)IFTYPE_RGB
> +		.data = (void *)I80_HW_TRG
>  	},
>  	{
>  		.compatible = "samsung,exynos5433-decon-tv",
> -		.data = (void *)IFTYPE_HDMI
> +		.data = (void *)(I80_HW_TRG | IFTYPE_HDMI)
>  	},
>  	{},
>  };
> @@ -644,12 +645,12 @@ static int exynos5433_decon_probe(struct platform_device *pdev)
>  	ctx->dev = dev;
>  
>  	of_id = of_match_device(exynos5433_decon_driver_dt_match, &pdev->dev);
> -	ctx->out_type = (enum decon_iftype)of_id->data;
> +	ctx->out_type = (unsigned int)of_id->data;
>  
> -	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;
> +		ctx->out_type |= IFTYPE_I80;
>  
>  	for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
>  		struct clk *clk;
> @@ -674,7 +675,7 @@ static int exynos5433_decon_probe(struct platform_device *pdev)
>  	}
>  
>  	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
> -			(ctx->out_type == IFTYPE_I80) ? "lcd_sys" : "vsync");
> +			(ctx->out_type & IFTYPE_I80) ? "lcd_sys" : "vsync");
>  	if (!res) {
>  		dev_err(dev, "cannot find IRQ resource\n");
>  		return -ENXIO;
> 

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