Re: [RFC 2/4] drm: exynos: add MDNIE post processor

[Ajay kumar <ajaynumb@gmail.com>]

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Hi Sachin,


On Wed, Mar 19, 2014 at 10:51 PM, Sachin Kamat <sachin.kamat@linaro.org>wrote:

> Hi Ajay,
>
> On 19 March 2014 19:52, Ajay Kumar <ajaykumar.rs@samsung.com> wrote:
> > Add post processor ops for MDNIE and their support functions.
> > Expose an interface for the FIMD to register MDNIE PP.
> >
> > Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
> > Signed-off-by: Shirish S <s.shirish@samsung.com>
> > Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
> > ---
> >  drivers/gpu/drm/exynos/Makefile            |   2 +-
> >  drivers/gpu/drm/exynos/exynos_mdnie.c      | 707
> +++++++++++++++++++++++++++++
> >  drivers/gpu/drm/exynos/exynos_mdnie_regs.h | 154 +++++++
> >  3 files changed, 862 insertions(+), 1 deletion(-)
> >  create mode 100644 drivers/gpu/drm/exynos/exynos_mdnie.c
> >  create mode 100644 drivers/gpu/drm/exynos/exynos_mdnie_regs.h
> >
> > diff --git a/drivers/gpu/drm/exynos/Makefile
> b/drivers/gpu/drm/exynos/Makefile
> > index 02dde22..653eab5 100644
> > --- a/drivers/gpu/drm/exynos/Makefile
> > +++ b/drivers/gpu/drm/exynos/Makefile
> > @@ -10,7 +10,7 @@ exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o \
> >
> >  exynosdrm-$(CONFIG_DRM_EXYNOS_IOMMU) += exynos_drm_iommu.o
> >  exynosdrm-$(CONFIG_DRM_EXYNOS_DMABUF) += exynos_drm_dmabuf.o
> > -exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD)    += exynos_drm_fimd.o
> > +exynosdrm-$(CONFIG_DRM_EXYNOS_FIMD)    += exynos_drm_fimd.o
> exynos_mdnie.o
> >  exynosdrm-$(CONFIG_DRM_EXYNOS_DSI)     += exynos_drm_dsi.o
> >  exynosdrm-$(CONFIG_DRM_EXYNOS_DP)      += exynos_dp_core.o
> exynos_dp_reg.o
> >  exynosdrm-$(CONFIG_DRM_EXYNOS_HDMI)    += exynos_hdmi.o exynos_mixer.o
> > diff --git a/drivers/gpu/drm/exynos/exynos_mdnie.c
> b/drivers/gpu/drm/exynos/exynos_mdnie.c
> > new file mode 100644
> > index 0000000..a043853
> > --- /dev/null
> > +++ b/drivers/gpu/drm/exynos/exynos_mdnie.c
> > @@ -0,0 +1,707 @@
> > +/* drivers/gpu/drm/exynos/exynos_mdnie.c
> > + *
> > + * Samsung mDNIe driver
> > + *
> > + * Copyright (C) 2014 Samsung Electronics Co., Ltd.
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> it
> > + * under the terms of the GNU General Public License as published by the
> > + * Free Software Foundation; either version 2 of the License, or (at
> your
> > + * option) any later version.
> > +*/
> > +
> > +#include <linux/clk.h>
> > +#include <linux/errno.h>
> > +#include <linux/of_device.h>
> > +
> > +#include <video/samsung_fimd.h>
> > +
> > +#include <drm/drmP.h>
> > +
> > +#include "exynos_drm_drv.h"
> > +#include "exynos_fimd_pp.h"
> > +#include "exynos_mdnie_regs.h"
> > +
> > +#define GAMMA_RAMP_LENGTH      17
> > +#define COLOR_COMPONENTS       3
> > +
> > +#define MDNIE_ON       1
> > +#define MDNIE_OFF      0
> > +
> > +#define PARAM_IN_RANGE(r, p, l, u)                                     \
> > +       do {                                                    \
> > +               r = ((p >= l) && (p <= u)) ? 0 : 1;             \
> > +               if (r) \
> > +                       DRM_ERROR("Wrong param: %s:%llu\n", #p, (u64)p);
> \
> > +       } while (0)
> > +
>
> [snip]
>
> > +static int mdnie_set_color_saturation_params(
> > +               struct mdnie_context *mdnie,
> > +               const struct drm_mode_color_saturation *params)
> > +{
> > +       int ret;
> > +
> > +       PARAM_IN_RANGE(ret, params->hue_gain_red, HG_MIN, HG_MAX);
> > +       PARAM_IN_RANGE(ret, params->hue_gain_green, HG_MIN, HG_MAX);
> > +       PARAM_IN_RANGE(ret, params->hue_gain_blue, HG_MIN, HG_MAX);
> > +       PARAM_IN_RANGE(ret, params->hue_gain_cyan, HG_MIN, HG_MAX);
> > +       PARAM_IN_RANGE(ret, params->hue_gain_magenta, HG_MIN, HG_MAX);
> > +       PARAM_IN_RANGE(ret, params->hue_gain_yellow, HG_MIN, HG_MAX);
> > +       PARAM_IN_RANGE(ret, params->hue_gain_overall, HG_MIN, HG_MAX);
> > +
> > +       if (ret)
> > +               return -EINVAL;
>
> This would be applicable only for the last macro call as ret would get
> overwritten after
> each call.
>
> Nice catch. I will fix it.

>
> > +       memcpy(&mdnie->params.cs_params, params, sizeof(*params));
> > +
> > +       return 0;
> > +}
> > +
> > +static int mdnie_set_color_reproduction_params(
> > +               struct mdnie_context *mdnie,
> > +               const struct drm_mode_color_reproduction *params)
> > +{
> > +       int ret;
> > +
> > +       PARAM_IN_RANGE(ret, params->red_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->red_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->red_rgb[2], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->green_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->green_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->green_rgb[2], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->blue_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->blue_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->blue_rgb[2], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->cyan_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->cyan_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->cyan_rgb[2], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->magenta_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->magenta_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->magenta_rgb[2], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->yellow_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->yellow_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->yellow_rgb[2], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->white_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->white_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->white_rgb[2], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->black_rgb[0], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->black_rgb[1], CC_MIN, CC_MAX);
> > +       PARAM_IN_RANGE(ret, params->black_rgb[2], CC_MIN, CC_MAX);
> > +
> > +       if (ret)
> > +               return -EINVAL;
> >
> ditto
>
> Ok.

> > +       memcpy(&mdnie->params.cr_params, params, sizeof(*params));
> > +       return 0;
> > +}
> > +
> > +static int mdnie_set_edge_enhancement_params(
> > +               struct mdnie_context *mdnie,
> > +               const struct drm_mode_edge_enhancement *params)
> > +{
> > +       int ret;
> > +
> > +       PARAM_IN_RANGE(ret, params->edge_th, TH_MIN, TH_MAX);
> > +       PARAM_IN_RANGE(ret, params->background_th, TH_MIN, TH_MAX);
> > +       PARAM_IN_RANGE(ret, params->pg_edge, GAIN_MIN, GAIN_MAX);
> > +       PARAM_IN_RANGE(ret, params->pg_flat, GAIN_MIN, GAIN_MAX);
> > +       PARAM_IN_RANGE(ret, params->pg_background, GAIN_MIN, GAIN_MAX);
> > +       PARAM_IN_RANGE(ret, params->ng_edge, GAIN_MIN, GAIN_MAX);
> > +       PARAM_IN_RANGE(ret, params->ng_flat, GAIN_MIN, GAIN_MAX);
> > +       PARAM_IN_RANGE(ret, params->ng_background, GAIN_MIN, GAIN_MAX);
>
> ditto
>
Ok.

>
> > +       if (ret)
> > +               return -EINVAL;
> > +
> > +       memcpy(&mdnie->params.de_params, params, sizeof(*params));
> > +       return 0;
> > +}
> > +
> > +static int mdnie_set_window_params(
> > +               struct mdnie_context *mdnie,
> > +               const struct drm_exynos_mdnie_window *params)
> > +{
> > +       int ret;
> > +
> > +       PARAM_IN_RANGE(ret, params->win_x, X_MIN, X_MAX);
> > +       PARAM_IN_RANGE(ret, params->win_y, Y_MIN, Y_MAX);
> > +       PARAM_IN_RANGE(ret, params->win_w, params->win_x, X_MAX);
> > +       PARAM_IN_RANGE(ret, params->win_h, params->win_y, Y_MAX);
>
> ditto and all other places of similar usage.
>
> Ok.

>
>
>
>
>
>
> [snip]
>
> > +int exynos_mdnie_init(struct device *dev, struct exynos_fimd_pp **pp)
> > +{
> > +       struct device_node *np = dev->of_node;
> > +       struct device_node *mdnie_np;
> > +       struct mdnie_context *mdnie = NULL;
> > +       u32 disp1blk_phyaddr;
> > +       int ret = 0;
> > +       u32 buf[2];
> > +
> > +       mdnie_np = of_parse_phandle(np, "samsung,mdnie", 0);
> > +       if (!mdnie_np) {
> > +               DRM_INFO("No mdnie node present, "
> > +                               "MDNIE feature will be disabled\n");
> > +               ret = -EINVAL;
> > +               goto err0;
>
> return directly from here.
>
> Ok.

> > +       }
> > +
> > +       if (of_property_read_u32_array(mdnie_np, "reg", buf, 2)) {
> > +               DRM_ERROR("failed to get base address for MDNIE\n");
> > +               ret = -ENOMEM;
> > +               goto err0;
>
> ditto
>
Ok.

>
>
> +       }
> > +
> > +       mdnie = kzalloc(sizeof(struct mdnie_context), GFP_KERNEL);
>
> nit: use sizeof(*mdnie)
>
> Ok.

> > +       if (!mdnie) {
> > +               DRM_ERROR("failed to allocate mdnie\n");
>
> This message is not needed as kzalloc prints OOM message upon failure.
>
Ok.

>
> > +               ret = -ENOMEM;
> > +               goto err0;
> > +       }
>
> return directly.

Ok.

>
> > +
> > +       mdnie->exynos_mdnie_base = ioremap(buf[0], buf[1]);
> > +       if (!mdnie->exynos_mdnie_base) {
> > +               DRM_ERROR("failed to ioremap mdnie device\n");
> > +               ret = -ENOMEM;
> > +               goto err1;
> > +       }
> > +
> > +       if (dt_parse_disp1blk_cfg(dev, &disp1blk_phyaddr)) {
> > +               DRM_ERROR("failed to get disp1blk property.\n");
> > +               ret = -ENODEV;
> > +               goto err1;
> > +       }
> > +
> > +       if (exynos_iomap_disp1blk(mdnie, disp1blk_phyaddr)) {
> > +               DRM_ERROR("failed to iopmap disp1blk sysreg.\n");
>
> s/iopmap/iomap
>
> Ok.

>
> --
> With warm regards,
> Sachin
>

I will address your comments in next patchset.

Thanks,
Ajay

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