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Message-ID: <1567388175.18937.10.camel@mtksdaap41>
Subject: Re: [PATCH 1/2] drm/mediatek: Support CMDQ interface in ddp
 component
From:   CK Hu <ck.hu@mediatek.com>
To:     Bibby Hsieh <bibby.hsieh@mediatek.com>
CC:     David Airlie <airlied@linux.ie>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        <dri-devel@lists.freedesktop.org>,
        <linux-mediatek@lists.infradead.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        YT Shen <yt.shen@mediatek.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        <linux-arm-kernel@lists.infradead.org>, <tfiga@chromium.org>,
        <drinkcat@chromium.org>, <linux-kernel@vger.kernel.org>,
        Yongqiang Niu <yongqiang.niu@mediatek.com>
Date:   Mon, 2 Sep 2019 09:36:15 +0800
In-Reply-To: <20190830074103.16671-2-bibby.hsieh@mediatek.com>
References: <20190830074103.16671-1-bibby.hsieh@mediatek.com>
         <20190830074103.16671-2-bibby.hsieh@mediatek.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi, Bibby:

On Fri, 2019-08-30 at 15:41 +0800, Bibby Hsieh wrote:
> The CMDQ (Command Queue) in MT8183 is used to help
> update all relevant display controller registers
> with critical time limation.
> This patch add cmdq interface in ddp_comp interface,
> let all ddp_comp interface can support cpu/cmdq function
> at the same time.
> 
> Signed-off-by: YT Shen <yt.shen@mediatek.com>
> Signed-off-by: CK Hu <ck.hu@mediatek.com>
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
> Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_color.c   |   7 +-
>  drivers/gpu/drm/mediatek/mtk_disp_ovl.c     |  78 +++++++-------
>  drivers/gpu/drm/mediatek/mtk_disp_rdma.c    |  66 ++++++------
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 110 ++++++++++++++------
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  53 ++++++----
>  5 files changed, 187 insertions(+), 127 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_color.c b/drivers/gpu/drm/mediatek/mtk_disp_color.c
> index f33d98b356d6..c5d3e3cf8ad5 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_color.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_color.c
> @@ -9,6 +9,7 @@
>  #include <linux/of_device.h>
>  #include <linux/of_irq.h>
>  #include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk-cmdq.h>
>  
>  #include "mtk_drm_crtc.h"
>  #include "mtk_drm_ddp_comp.h"
> @@ -45,12 +46,12 @@ static inline struct mtk_disp_color *comp_to_color(struct mtk_ddp_comp *comp)
>  
>  static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
>  			     unsigned int h, unsigned int vrefresh,
> -			     unsigned int bpc)
> +			     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
>  {
>  	struct mtk_disp_color *color = comp_to_color(comp);
>  
> -	writel(w, comp->regs + DISP_COLOR_WIDTH(color));
> -	writel(h, comp->regs + DISP_COLOR_HEIGHT(color));
> +	mtk_ddp_write(cmdq_pkt, w, comp, DISP_COLOR_WIDTH(color));
> +	mtk_ddp_write(cmdq_pkt, h, comp, DISP_COLOR_HEIGHT(color));
>  }
>  
>  static void mtk_color_start(struct mtk_ddp_comp *comp)
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index 94c80c215c6e..f11c785199d3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -9,6 +9,7 @@
>  #include <linux/of_device.h>
>  #include <linux/of_irq.h>
>  #include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk-cmdq.h>
>  
>  #include "mtk_drm_crtc.h"
>  #include "mtk_drm_ddp_comp.h"
> @@ -120,14 +121,15 @@ static void mtk_ovl_stop(struct mtk_ddp_comp *comp)
>  
>  static void mtk_ovl_config(struct mtk_ddp_comp *comp, unsigned int w,
>  			   unsigned int h, unsigned int vrefresh,
> -			   unsigned int bpc)
> +			   unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
>  {
>  	if (w != 0 && h != 0)
> -		writel_relaxed(h << 16 | w, comp->regs + DISP_REG_OVL_ROI_SIZE);
> -	writel_relaxed(0x0, comp->regs + DISP_REG_OVL_ROI_BGCLR);
> +		mtk_ddp_write_relaxed(cmdq_pkt, h << 16 | w, comp,
> +		DISP_REG_OVL_ROI_SIZE);

indent.

> +	mtk_ddp_write_relaxed(cmdq_pkt, 0x0, comp, DISP_REG_OVL_ROI_BGCLR);
>  
> -	writel(0x1, comp->regs + DISP_REG_OVL_RST);
> -	writel(0x0, comp->regs + DISP_REG_OVL_RST);
> +	mtk_ddp_write(cmdq_pkt, 0x1, comp, DISP_REG_OVL_RST);
> +	mtk_ddp_write(cmdq_pkt, 0x0, comp, DISP_REG_OVL_RST);
>  }
>  
>  static unsigned int mtk_ovl_layer_nr(struct mtk_ddp_comp *comp)
> @@ -137,7 +139,8 @@ static unsigned int mtk_ovl_layer_nr(struct mtk_ddp_comp *comp)
>  	return ovl->data->layer_nr;
>  }
>  
> -static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
> +static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx,
> +			     struct cmdq_pkt *cmdq_pkt)
>  {
>  	unsigned int reg;
>  	unsigned int gmc_thrshd_l;
> @@ -145,8 +148,8 @@ static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
>  	unsigned int gmc_value;
>  	struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
>  
> -	writel(0x1, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
> -
> +	mtk_ddp_write(cmdq_pkt, 0x1, comp,
> +		      DISP_REG_OVL_RDMA_CTRL(idx));
>  	gmc_thrshd_l = GMC_THRESHOLD_LOW >>
>  		      (GMC_THRESHOLD_BITS - ovl->data->gmc_bits);
>  	gmc_thrshd_h = GMC_THRESHOLD_HIGH >>
> @@ -156,22 +159,19 @@ static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
>  	else
>  		gmc_value = gmc_thrshd_l | gmc_thrshd_l << 8 |
>  			    gmc_thrshd_h << 16 | gmc_thrshd_h << 24;
> -	writel(gmc_value, comp->regs + DISP_REG_OVL_RDMA_GMC(idx));
> -
> -	reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
> -	reg = reg | BIT(idx);
> -	writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
> +	mtk_ddp_write(cmdq_pkt, gmc_value,
> +		      comp, DISP_REG_OVL_RDMA_GMC(idx));
> +	mtk_ddp_write_mask(cmdq_pkt, BIT(idx), comp,
> +			    DISP_REG_OVL_SRC_CON, BIT(idx));
>  }
>  
> -static void mtk_ovl_layer_off(struct mtk_ddp_comp *comp, unsigned int idx)
> +static void mtk_ovl_layer_off(struct mtk_ddp_comp *comp, unsigned int idx,
> +			      struct cmdq_pkt *cmdq_pkt)
>  {
> -	unsigned int reg;
> -
> -	reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
> -	reg = reg & ~BIT(idx);
> -	writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
> -
> -	writel(0x0, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
> +	mtk_ddp_write_mask(cmdq_pkt, 0, comp,
> +			    DISP_REG_OVL_SRC_CON, BIT(idx));
> +	mtk_ddp_write(cmdq_pkt, 0, comp,
> +		       DISP_REG_OVL_RDMA_CTRL(idx));
>  }
>  
>  static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt)
> @@ -211,7 +211,8 @@ static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt)
>  }
>  
>  static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
> -				 struct mtk_plane_state *state)
> +				 struct mtk_plane_state *state,
> +				 struct cmdq_pkt *cmdq_pkt)
>  {
>  	struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
>  	struct mtk_plane_pending_state *pending = &state->pending;
> @@ -223,38 +224,37 @@ static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
>  	unsigned int con;
>  
>  	if (!pending->enable)
> -		mtk_ovl_layer_off(comp, idx);
> +		mtk_ovl_layer_off(comp, idx, cmdq_pkt);
>  
>  	con = ovl_fmt_convert(ovl, fmt);
>  	if (idx != 0)
>  		con |= OVL_CON_AEN | OVL_CON_ALPHA;
>  
> -	writel_relaxed(con, comp->regs + DISP_REG_OVL_CON(idx));
> -	writel_relaxed(pitch, comp->regs + DISP_REG_OVL_PITCH(idx));
> -	writel_relaxed(src_size, comp->regs + DISP_REG_OVL_SRC_SIZE(idx));
> -	writel_relaxed(offset, comp->regs + DISP_REG_OVL_OFFSET(idx));
> -	writel_relaxed(addr, comp->regs + DISP_REG_OVL_ADDR(ovl, idx));
> +	mtk_ddp_write_relaxed(cmdq_pkt, con, comp,
> +			      DISP_REG_OVL_CON(idx));
> +	mtk_ddp_write_relaxed(cmdq_pkt, pitch, comp,
> +			      DISP_REG_OVL_PITCH(idx));
> +	mtk_ddp_write_relaxed(cmdq_pkt, src_size, comp,
> +			      DISP_REG_OVL_SRC_SIZE(idx));
> +	mtk_ddp_write_relaxed(cmdq_pkt, offset, comp,
> +			      DISP_REG_OVL_OFFSET(idx));
> +	mtk_ddp_write_relaxed(cmdq_pkt, addr, comp,
> +			      DISP_REG_OVL_ADDR(ovl, idx));
>  
>  	if (pending->enable)
> -		mtk_ovl_layer_on(comp, idx);
> +		mtk_ovl_layer_on(comp, idx, cmdq_pkt);
>  }
>  
>  static void mtk_ovl_bgclr_in_on(struct mtk_ddp_comp *comp)
>  {
> -	unsigned int reg;
> -
> -	reg = readl(comp->regs + DISP_REG_OVL_DATAPATH_CON);
> -	reg = reg | OVL_BGCLR_SEL_IN;
> -	writel(reg, comp->regs + DISP_REG_OVL_DATAPATH_CON);
> +	mtk_ddp_write_mask(NULL, OVL_BGCLR_SEL_IN, comp,
> +			   DISP_REG_OVL_DATAPATH_CON, OVL_BGCLR_SEL_IN);

If the first parameter is NULL, why do you modify this?

>  }
>  
>  static void mtk_ovl_bgclr_in_off(struct mtk_ddp_comp *comp)
>  {
> -	unsigned int reg;
> -
> -	reg = readl(comp->regs + DISP_REG_OVL_DATAPATH_CON);
> -	reg = reg & ~OVL_BGCLR_SEL_IN;
> -	writel(reg, comp->regs + DISP_REG_OVL_DATAPATH_CON);
> +	mtk_ddp_write_mask(NULL, 0, comp,
> +			   DISP_REG_OVL_DATAPATH_CON, OVL_BGCLR_SEL_IN);

Ditto.

>  }
>  
>  static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> index 24945fec00b1..6df372dac3e3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> @@ -9,6 +9,7 @@
>  #include <linux/of_device.h>
>  #include <linux/of_irq.h>
>  #include <linux/platform_device.h>
> +#include <linux/soc/mediatek/mtk-cmdq.h>
>  
>  #include "mtk_drm_crtc.h"
>  #include "mtk_drm_ddp_comp.h"
> @@ -86,23 +87,14 @@ static irqreturn_t mtk_disp_rdma_irq_handler(int irq, void *dev_id)
>  	return IRQ_HANDLED;
>  }
>  
> -static void rdma_update_bits(struct mtk_ddp_comp *comp, unsigned int reg,
> -			     unsigned int mask, unsigned int val)
> -{
> -	unsigned int tmp = readl(comp->regs + reg);
> -
> -	tmp = (tmp & ~mask) | (val & mask);
> -	writel(tmp, comp->regs + reg);
> -}
> -
>  static void mtk_rdma_enable_vblank(struct mtk_ddp_comp *comp,
>  				   struct drm_crtc *crtc)
>  {
>  	struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
>  
>  	rdma->crtc = crtc;
> -	rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT,
> -			 RDMA_FRAME_END_INT);
> +	mtk_ddp_write_mask(NULL, RDMA_FRAME_END_INT, comp,
> +			   DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT);

Ditto.

>  }
>  
>  static void mtk_rdma_disable_vblank(struct mtk_ddp_comp *comp)
> @@ -110,31 +102,35 @@ static void mtk_rdma_disable_vblank(struct mtk_ddp_comp *comp)
>  	struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
>  
>  	rdma->crtc = NULL;
> -	rdma_update_bits(comp, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT, 0);
> +	mtk_ddp_write_mask(NULL, 0, comp,
> +			   DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT);

Ditto.

>  }
>  
>  static void mtk_rdma_start(struct mtk_ddp_comp *comp)
>  {
> -	rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN,
> -			 RDMA_ENGINE_EN);
> +	mtk_ddp_write_mask(NULL, RDMA_ENGINE_EN, comp,
> +			   DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN);

Ditto.

>  }
>  
>  static void mtk_rdma_stop(struct mtk_ddp_comp *comp)
>  {
> -	rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0);
> +	mtk_ddp_write_mask(NULL, 0, comp,
> +			   DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN);

Ditto.

Regards,
CK

>  }
>  
>  static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width,
>  			    unsigned int height, unsigned int vrefresh,
> -			    unsigned int bpc)
> +			    unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
>  {
>  	unsigned int threshold;
>  	unsigned int reg;
>  	struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
>  	u32 rdma_fifo_size;
>  
> -	rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xfff, width);
> -	rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_1, 0xfffff, height);
> +	mtk_ddp_write_mask(cmdq_pkt, width, comp,
> +			    DISP_REG_RDMA_SIZE_CON_0, 0xfff);
> +	mtk_ddp_write_mask(cmdq_pkt, height, comp,
> +			    DISP_REG_RDMA_SIZE_CON_1, 0xfffff);
>  
>  	if (rdma->fifo_size)
>  		rdma_fifo_size = rdma->fifo_size;
> @@ -151,7 +147,7 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width,
>  	reg = RDMA_FIFO_UNDERFLOW_EN |
>  	      RDMA_FIFO_PSEUDO_SIZE(rdma_fifo_size) |
>  	      RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
> -	writel(reg, comp->regs + DISP_REG_RDMA_FIFO_CON);
> +	mtk_ddp_write(cmdq_pkt, reg, comp, DISP_REG_RDMA_FIFO_CON);
>  }
>  


> +			   struct mtk_ddp_comp *comp, unsigned int offset);
> +void mtk_ddp_write_mask(struct cmdq_pkt *cmdq_pkt, unsigned int value,
> +			struct mtk_ddp_comp *comp, unsigned int offset,
> +			unsigned int mask);
>  #endif /* MTK_DRM_DDP_COMP_H */