Re: [PATCH 2/2] drm/exynos: implement atomic_{begin/flush} of FIMD and DECON

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On 2015년 08월 20일 11:33, Hyungwon Hwang wrote:
> Each CRTC's atomic_{begin/flush} must stop/start the update of shadow
> registers to active register in the functions. This patch achieves these
> purpose by moving the setting of protection bits to those functions from
> {fimd/decon}_update_plane.

Hyungwon,
Gustavo already posted atomic_begin/flush support. However, he didn't
consider decon drivers.

Can you post only atomic_begin/flush support for decon drivers?

Thanks,
Inki Dae

> 
> Signed-off-by: Hyungwon Hwang <human.hwang@xxxxxxxxxxx>
> ---
>  drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 47 +++++++++++++++++-------
>  drivers/gpu/drm/exynos/exynos7_drm_decon.c    | 47 ++++++++++++++++--------
>  drivers/gpu/drm/exynos/exynos_drm_fimd.c      | 51 ++++++++++++++++++---------
>  3 files changed, 103 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> index 484e312..fef0333 100644
> --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> @@ -31,6 +31,7 @@ struct decon_context {
>  	struct drm_device		*drm_dev;
>  	struct exynos_drm_crtc		*crtc;
>  	struct exynos_drm_plane		planes[WINDOWS_NR];
> +	unsigned int			updated_plane;
>  	void __iomem			*addr;
>  	struct clk			*clks[6];
>  	unsigned int			default_win;
> @@ -204,17 +205,17 @@ static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
>  	writel(val, ctx->addr + DECON_WINCONx(win));
>  }
>  
> -static void decon_shadow_protect_win(struct decon_context *ctx, int win,
> -					bool protect)
> +static void decon_shadow_protect_win(struct decon_context *ctx,
> +				unsigned int win_bits, bool protect)
>  {
>  	u32 val;
>  
>  	val = readl(ctx->addr + DECON_SHADOWCON);
>  
>  	if (protect)
> -		val |= SHADOWCON_Wx_PROTECT(win);
> +		val |= win_bits;
>  	else
> -		val &= ~SHADOWCON_Wx_PROTECT(win);
> +		val &= ~win_bits;
>  
>  	writel(val, ctx->addr + DECON_SHADOWCON);
>  }
> @@ -232,8 +233,6 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
>  	if (ctx->suspended)
>  		return;
>  
> -	decon_shadow_protect_win(ctx, win, true);
> -
>  	val = COORDINATE_X(plane->crtc_x) | COORDINATE_Y(plane->crtc_y);
>  	writel(val, ctx->addr + DECON_VIDOSDxA(win));
>  
> @@ -265,15 +264,12 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
>  	val |= WINCONx_ENWIN_F;
>  	writel(val, ctx->addr + DECON_WINCONx(win));
>  
> -	decon_shadow_protect_win(ctx, win, false);
> -
>  	/* standalone update */
>  	val = readl(ctx->addr + DECON_UPDATE);
>  	val |= STANDALONE_UPDATE_F;
>  	writel(val, ctx->addr + DECON_UPDATE);
>  
> -	if (ctx->i80_if)
> -		atomic_set(&ctx->win_updated, 1);
> +	ctx->updated_plane |= SHADOWCON_Wx_PROTECT(win);
>  }
>  
>  static void decon_disable_plane(struct exynos_drm_crtc *crtc,
> @@ -286,14 +282,14 @@ static void decon_disable_plane(struct exynos_drm_crtc *crtc,
>  	if (ctx->suspended)
>  		return;
>  
> -	decon_shadow_protect_win(ctx, win, true);
> +	decon_shadow_protect_win(ctx, SHADOWCON_Wx_PROTECT(win), true);
>  
>  	/* window disable */
>  	val = readl(ctx->addr + DECON_WINCONx(win));
>  	val &= ~WINCONx_ENWIN_F;
>  	writel(val, ctx->addr + DECON_WINCONx(win));
>  
> -	decon_shadow_protect_win(ctx, win, false);
> +	decon_shadow_protect_win(ctx, SHADOWCON_Wx_PROTECT(win), false);
>  
>  	/* standalone update */
>  	val = readl(ctx->addr + DECON_UPDATE);
> @@ -405,6 +401,31 @@ void decon_te_irq_handler(struct exynos_drm_crtc *crtc)
>  	drm_crtc_handle_vblank(&ctx->crtc->base);
>  }
>  
> +static void decon_begin(struct exynos_drm_crtc *crtc)
> +{
> +	struct decon_context *ctx = crtc->ctx;
> +	int i;
> +	unsigned int val = 0;
> +
> +	for (i = 0; i < WINDOWS_NR; i++)
> +		val |= SHADOWCON_Wx_PROTECT(i);
> +
> +	/* protect windows */
> +	decon_shadow_protect_win(ctx, val, true);
> +}
> +
> +static void decon_flush(struct exynos_drm_crtc *crtc)
> +{
> +	struct decon_context *ctx = crtc->ctx;
> +
> +	if (ctx->updated_plane) {
> +		decon_shadow_protect_win(ctx, ctx->updated_plane, false);
> +
> +		if (ctx->i80_if)
> +			atomic_set(&ctx->win_updated, 1);
> +	}
> +}
> +
>  static void decon_clear_channels(struct exynos_drm_crtc *crtc)
>  {
>  	struct decon_context *ctx = crtc->ctx;
> @@ -458,6 +479,8 @@ static struct exynos_drm_crtc_ops decon_crtc_ops = {
>  	.update_plane		= decon_update_plane,
>  	.disable_plane		= decon_disable_plane,
>  	.te_handler		= decon_te_irq_handler,
> +	.atomic_begin		= decon_begin,
> +	.atomic_flush		= decon_flush,
>  };
>  
>  static int decon_bind(struct device *dev, struct device *master, void *data)
> diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
> index 0792654..c81de86 100644
> --- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c
> +++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c
> @@ -47,6 +47,7 @@ struct decon_context {
>  	struct drm_device		*drm_dev;
>  	struct exynos_drm_crtc		*crtc;
>  	struct exynos_drm_plane		planes[WINDOWS_NR];
> +	unsigned int			updated_plane;
>  	struct clk			*pclk;
>  	struct clk			*aclk;
>  	struct clk			*eclk;
> @@ -369,17 +370,15 @@ static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)
>   * @protect: 1 to protect (disable updates)
>   */
>  static void decon_shadow_protect_win(struct decon_context *ctx,
> -				     unsigned int win, bool protect)
> +				     unsigned int win_bits, bool protect)
>  {
> -	u32 bits, val;
> -
> -	bits = SHADOWCON_WINx_PROTECT(win);
> +	u32 val;
>  
>  	val = readl(ctx->regs + SHADOWCON);
>  	if (protect)
> -		val |= bits;
> +		val |= win_bits;
>  	else
> -		val &= ~bits;
> +		val &= ~win_bits;
>  	writel(val, ctx->regs + SHADOWCON);
>  }
>  
> @@ -410,9 +409,6 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
>  	 * is set.
>  	 */
>  
> -	/* protect windows */
> -	decon_shadow_protect_win(ctx, win, true);
> -
>  	/* buffer start address */
>  	val = (unsigned long)plane->dma_addr[0];
>  	writel(val, ctx->regs + VIDW_BUF_START(win));
> @@ -484,12 +480,11 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc,
>  	val |= WINCONx_ENWIN;
>  	writel(val, ctx->regs + WINCON(win));
>  
> -	/* Enable DMA channel and unprotect windows */
> -	decon_shadow_protect_win(ctx, win, false);
> -
>  	val = readl(ctx->regs + DECON_UPDATE);
>  	val |= DECON_UPDATE_STANDALONE_F;
>  	writel(val, ctx->regs + DECON_UPDATE);
> +
> +	ctx->updated_plane |= SHADOWCON_WINx_PROTECT(win);
>  }
>  
>  static void decon_disable_plane(struct exynos_drm_crtc *crtc,
> @@ -503,7 +498,7 @@ static void decon_disable_plane(struct exynos_drm_crtc *crtc,
>  		return;
>  
>  	/* protect windows */
> -	decon_shadow_protect_win(ctx, win, true);
> +	decon_shadow_protect_win(ctx, SHADOWCON_WINx_PROTECT(win), true);
>  
>  	/* wincon */
>  	val = readl(ctx->regs + WINCON(win));
> @@ -511,7 +506,7 @@ static void decon_disable_plane(struct exynos_drm_crtc *crtc,
>  	writel(val, ctx->regs + WINCON(win));
>  
>  	/* unprotect windows */
> -	decon_shadow_protect_win(ctx, win, false);
> +	decon_shadow_protect_win(ctx, SHADOWCON_WINx_PROTECT(win), false);
>  
>  	val = readl(ctx->regs + DECON_UPDATE);
>  	val |= DECON_UPDATE_STANDALONE_F;
> @@ -606,6 +601,28 @@ static void decon_disable(struct exynos_drm_crtc *crtc)
>  	ctx->suspended = true;
>  }
>  
> +static void decon_begin(struct exynos_drm_crtc *crtc)
> +{
> +	struct decon_context *ctx = crtc->ctx;
> +	int i;
> +	unsigned int val = 0;
> +
> +	for (i = 0; i < WINDOWS_NR; i++)
> +		val |= SHADOWCON_WINx_PROTECT(i);
> +
> +	/* protect windows */
> +	decon_shadow_protect_win(ctx, val, true);
> +}
> +
> +static void decon_flush(struct exynos_drm_crtc *crtc)
> +{
> +	struct decon_context *ctx = crtc->ctx;
> +
> +	if (ctx->updated_plane)
> +		decon_shadow_protect_win(ctx, ctx->updated_plane, false);
> +}
> +
> +
>  static const struct exynos_drm_crtc_ops decon_crtc_ops = {
>  	.enable = decon_enable,
>  	.disable = decon_disable,
> @@ -616,6 +633,8 @@ static const struct exynos_drm_crtc_ops decon_crtc_ops = {
>  	.wait_for_vblank = decon_wait_for_vblank,
>  	.update_plane = decon_update_plane,
>  	.disable_plane = decon_disable_plane,
> +	.atomic_begin = decon_begin,
> +	.atomic_flush = decon_flush,
>  };
>  
>  
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> index 5def6bc..0b41bb2 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
> @@ -149,6 +149,7 @@ struct fimd_context {
>  	struct drm_device		*drm_dev;
>  	struct exynos_drm_crtc		*crtc;
>  	struct exynos_drm_plane		planes[WINDOWS_NR];
> +	unsigned int			updated_plane;
>  	struct clk			*bus_clk;
>  	struct clk			*lcd_clk;
>  	void __iomem			*regs;
> @@ -587,23 +588,22 @@ static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
>   * @protect: 1 to protect (disable updates)
>   */
>  static void fimd_shadow_protect_win(struct fimd_context *ctx,
> -				    unsigned int win, bool protect)
> +				    unsigned int win_bits, bool protect)
>  {
> -	u32 reg, bits, val;
> +	u32 reg, val;
>  
>  	if (ctx->driver_data->has_shadowcon) {
>  		reg = SHADOWCON;
> -		bits = SHADOWCON_WINx_PROTECT(win);
>  	} else {
>  		reg = PRTCON;
> -		bits = PRTCON_PROTECT;
> +		win_bits = PRTCON_PROTECT;
>  	}
>  
>  	val = readl(ctx->regs + reg);
>  	if (protect)
> -		val |= bits;
> +		val |= win_bits;
>  	else
> -		val &= ~bits;
> +		val &= ~win_bits;
>  	writel(val, ctx->regs + reg);
>  }
>  
> @@ -632,10 +632,6 @@ static void fimd_update_plane(struct exynos_drm_crtc *crtc,
>  	 * is set.
>  	 */
>  
> -	/* protect windows */
> -	fimd_shadow_protect_win(ctx, win, true);
> -
> -
>  	offset = plane->src_x * bpp;
>  	offset += plane->src_y * pitch;
>  
> @@ -707,11 +703,32 @@ static void fimd_update_plane(struct exynos_drm_crtc *crtc,
>  	if (ctx->driver_data->has_shadowcon)
>  		fimd_enable_shadow_channel_path(ctx, win, true);
>  
> -	/* Enable DMA channel and unprotect windows */
> -	fimd_shadow_protect_win(ctx, win, false);
> +	ctx->updated_plane |= SHADOWCON_WINx_PROTECT(win);
> +}
> +
> +static void fimd_begin(struct exynos_drm_crtc *crtc)
> +{
> +	struct fimd_context *ctx = crtc->ctx;
> +	int i;
> +	unsigned int val = 0;
> +
> +	for (i = 0; i < WINDOWS_NR; i++)
> +		val |= SHADOWCON_WINx_PROTECT(i);
>  
> -	if (ctx->i80_if)
> -		atomic_set(&ctx->win_updated, 1);
> +	/* protect windows */
> +	fimd_shadow_protect_win(ctx, val, true);
> +}
> +
> +static void fimd_flush(struct exynos_drm_crtc *crtc)
> +{
> +	struct fimd_context *ctx = crtc->ctx;
> +
> +	if (ctx->updated_plane) {
> +		fimd_shadow_protect_win(ctx, ctx->updated_plane, false);
> +
> +		if (ctx->i80_if)
> +			atomic_set(&ctx->win_updated, 1);
> +	}
>  }
>  
>  static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
> @@ -724,7 +741,7 @@ static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
>  		return;
>  
>  	/* protect windows */
> -	fimd_shadow_protect_win(ctx, win, true);
> +	fimd_shadow_protect_win(ctx, SHADOWCON_WINx_PROTECT(win), true);
>  
>  	fimd_enable_video_output(ctx, win, false);
>  
> @@ -732,7 +749,7 @@ static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
>  		fimd_enable_shadow_channel_path(ctx, win, false);
>  
>  	/* unprotect windows */
> -	fimd_shadow_protect_win(ctx, win, false);
> +	fimd_shadow_protect_win(ctx, SHADOWCON_WINx_PROTECT(win), false);
>  }
>  
>  static void fimd_enable(struct exynos_drm_crtc *crtc)
> @@ -879,6 +896,8 @@ static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
>  	.disable_plane = fimd_disable_plane,
>  	.te_handler = fimd_te_handler,
>  	.clock_enable = fimd_dp_clock_enable,
> +	.atomic_begin = fimd_begin,
> +	.atomic_flush = fimd_flush,
>  };
>  
>  static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
> 

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