linux-kernel - Re: [PATCH v4 10/78] drm/vc4: crtc: Rename HVS channel to output

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Date:   Tue, 28 Jul 2020 10:48:52 +0100
From:   Dave Stevenson <dave.stevenson@...pberrypi.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Eric Anholt <eric@...olt.net>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>
Subject: Re: [PATCH v4 10/78] drm/vc4: crtc: Rename HVS channel to output

Hi Maxime

On Wed, 8 Jul 2020 at 18:42, Maxime Ripard <maxime@...no.tech> wrote:
>
> In vc5, the HVS has 6 outputs and 3 FIFOs (or channels), with
> pixelvalves each being assigned to a given output, but each output can
> then be muxed to feed from multiple FIFOs.
>
> Since vc4 had that entirely static, both were probably equivalent, but
> since that changes, let's rename hvs_channel to hvs_output in the
> vc4_crtc_data, since a pixelvalve is really connected to an output, and
> not to a FIFO.
>
> Signed-off-by: Maxime Ripard <maxime@...no.tech>

Reviewed-by: Dave Stevenson <dave.stevenson@...pberrypi.com>

> ---
>  drivers/gpu/drm/vc4/vc4_crtc.c | 8 ++++----
>  drivers/gpu/drm/vc4/vc4_drv.h  | 4 ++--
>  drivers/gpu/drm/vc4/vc4_hvs.c  | 2 +-
>  drivers/gpu/drm/vc4/vc4_txp.c  | 2 +-
>  4 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
> index fdecaba77836..d3126fe04d9a 100644
> --- a/drivers/gpu/drm/vc4/vc4_crtc.c
> +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
> @@ -775,7 +775,7 @@ static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
>
>  static const struct vc4_pv_data bcm2835_pv0_data = {
>         .base = {
> -               .hvs_channel = 0,
> +               .hvs_output = 0,
>         },
>         .debugfs_name = "crtc0_regs",
>         .pixels_per_clock = 1,
> @@ -787,7 +787,7 @@ static const struct vc4_pv_data bcm2835_pv0_data = {
>
>  static const struct vc4_pv_data bcm2835_pv1_data = {
>         .base = {
> -               .hvs_channel = 2,
> +               .hvs_output = 2,
>         },
>         .debugfs_name = "crtc1_regs",
>         .pixels_per_clock = 1,
> @@ -799,7 +799,7 @@ static const struct vc4_pv_data bcm2835_pv1_data = {
>
>  static const struct vc4_pv_data bcm2835_pv2_data = {
>         .base = {
> -               .hvs_channel = 1,
> +               .hvs_output = 1,
>         },
>         .debugfs_name = "crtc2_regs",
>         .pixels_per_clock = 1,
> @@ -862,7 +862,7 @@ int vc4_crtc_init(struct drm_device *drm, struct vc4_crtc *vc4_crtc,
>         drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
>                                   crtc_funcs, NULL);
>         drm_crtc_helper_add(crtc, crtc_helper_funcs);
> -       vc4_crtc->channel = vc4_crtc->data->hvs_channel;
> +       vc4_crtc->channel = vc4_crtc->data->hvs_output;
>         drm_mode_crtc_set_gamma_size(crtc, ARRAY_SIZE(vc4_crtc->lut_r));
>         drm_crtc_enable_color_mgmt(crtc, 0, false, crtc->gamma_size);
>
> diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
> index d80fc3bbb450..d1cf4c038180 100644
> --- a/drivers/gpu/drm/vc4/vc4_drv.h
> +++ b/drivers/gpu/drm/vc4/vc4_drv.h
> @@ -447,8 +447,8 @@ to_vc4_encoder(struct drm_encoder *encoder)
>  }
>
>  struct vc4_crtc_data {
> -       /* Which channel of the HVS this pixelvalve sources from. */
> -       int hvs_channel;
> +       /* Which output of the HVS this pixelvalve sources from. */
> +       int hvs_output;
>  };
>
>  struct vc4_pv_data {
> diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
> index 091fdf4908aa..6fd9de1dc65a 100644
> --- a/drivers/gpu/drm/vc4/vc4_hvs.c
> +++ b/drivers/gpu/drm/vc4/vc4_hvs.c
> @@ -419,7 +419,7 @@ void vc4_hvs_mode_set_nofb(struct drm_crtc *crtc)
>         struct drm_display_mode *mode = &crtc->state->adjusted_mode;
>         bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE;
>
> -       if (vc4_crtc->data->hvs_channel == 2) {
> +       if (vc4_crtc->data->hvs_output == 2) {
>                 u32 dispctrl;
>                 u32 dsp3_mux;
>
> diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c
> index a7c3af0005a0..f39d9900d027 100644
> --- a/drivers/gpu/drm/vc4/vc4_txp.c
> +++ b/drivers/gpu/drm/vc4/vc4_txp.c
> @@ -452,7 +452,7 @@ static irqreturn_t vc4_txp_interrupt(int irq, void *data)
>  }
>
>  static const struct vc4_crtc_data vc4_txp_crtc_data = {
> -       .hvs_channel = 2,
> +       .hvs_output = 2,
>  };
>
>  static int vc4_txp_bind(struct device *dev, struct device *master, void *data)
> --
> git-series 0.9.1