[PATCH 06/23] drm/sun4i: tcon: Don't rely on encoders to set the TCON mode

Chen-Yu Tsai wens at csie.org
Tue Oct 17 02:56:47 PDT 2017


On Tue, Oct 17, 2017 at 5:06 PM, Maxime Ripard
<maxime.ripard at free-electrons.com> wrote:
> Just like we did for the TCON enable and disable, for historical reasons we
> used to rely on the encoders calling the TCON mode_set function, while the
> CRTC has a callback for that.
>
> Let's implement it in order to reduce the boilerplate code.
>
> Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
> ---
>  drivers/gpu/drm/sun4i/sun4i_crtc.c          | 10 +++++++-
>  drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c  |  1 +-
>  drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c      |  7 +-----
>  drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c |  1 +-
>  drivers/gpu/drm/sun4i/sun4i_rgb.c           | 15 +-----------
>  drivers/gpu/drm/sun4i/sun4i_tcon.c          | 31 +++++++++++++++++-----
>  drivers/gpu/drm/sun4i/sun4i_tcon.h          | 11 ++------
>  drivers/gpu/drm/sun4i/sun4i_tv.c            |  6 +----
>  8 files changed, 37 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c
> index e86baa3746af..5decae0069d0 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_crtc.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
> @@ -115,11 +115,21 @@ static void sun4i_crtc_atomic_enable(struct drm_crtc *crtc,
>         sun4i_tcon_set_status(scrtc->tcon, encoder, true);
>  }
>
> +static void sun4i_crtc_mode_set_nofb(struct drm_crtc *crtc)
> +{
> +       struct drm_display_mode *mode = &crtc->state->adjusted_mode;
> +       struct drm_encoder *encoder = sun4i_crtc_get_encoder(crtc);
> +       struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
> +
> +       sun4i_tcon_mode_set(scrtc->tcon, encoder, mode);
> +}
> +
>  static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
>         .atomic_begin   = sun4i_crtc_atomic_begin,
>         .atomic_flush   = sun4i_crtc_atomic_flush,
>         .atomic_enable  = sun4i_crtc_atomic_enable,
>         .atomic_disable = sun4i_crtc_atomic_disable,
> +       .mode_set_nofb  = sun4i_crtc_mode_set_nofb,
>  };
>
>  static int sun4i_crtc_enable_vblank(struct drm_crtc *crtc)
> diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
> index 04f85b1cf922..e826da34e919 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_ddc_clk.c
> @@ -13,7 +13,6 @@
>  #include <linux/clk-provider.h>
>  #include <linux/regmap.h>
>
> -#include "sun4i_tcon.h"
>  #include "sun4i_hdmi.h"
>
>  struct sun4i_ddc {
> diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
> index 482bf03d55c1..d2eb0a60e568 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
> @@ -30,7 +30,6 @@
>  #include "sun4i_crtc.h"
>  #include "sun4i_drv.h"
>  #include "sun4i_hdmi.h"
> -#include "sun4i_tcon.h"
>
>  static inline struct sun4i_hdmi *
>  drm_encoder_to_sun4i_hdmi(struct drm_encoder *encoder)
> @@ -120,15 +119,9 @@ static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
>                                 struct drm_display_mode *adjusted_mode)
>  {
>         struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
> -       struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
> -       struct sun4i_tcon *tcon = crtc->tcon;
>         unsigned int x, y;
>         u32 val;
>
> -       sun4i_tcon1_mode_set(tcon, mode);
> -       sun4i_tcon_set_mux(tcon, 1, encoder);
> -
> -       clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
>         clk_set_rate(hdmi->mod_clk, mode->crtc_clock * 1000);
>         clk_set_rate(hdmi->tmds_clk, mode->crtc_clock * 1000);
>
> diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c
> index 1b6b37aefc38..dc332ea56f6c 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c
> @@ -12,7 +12,6 @@
>
>  #include <linux/clk-provider.h>
>
> -#include "sun4i_tcon.h"
>  #include "sun4i_hdmi.h"
>
>  struct sun4i_tmds {
> diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c
> index a7f297ed40c1..832f8f9bc47f 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_rgb.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c
> @@ -153,22 +153,7 @@ static void sun4i_rgb_encoder_disable(struct drm_encoder *encoder)
>         }
>  }
>
> -static void sun4i_rgb_encoder_mode_set(struct drm_encoder *encoder,
> -                                      struct drm_display_mode *mode,
> -                                      struct drm_display_mode *adjusted_mode)
> -{
> -       struct sun4i_rgb *rgb = drm_encoder_to_sun4i_rgb(encoder);
> -       struct sun4i_tcon *tcon = rgb->tcon;
> -
> -       sun4i_tcon0_mode_set(tcon, mode);
> -       sun4i_tcon_set_mux(tcon, 0, encoder);
> -
> -       /* FIXME: This seems to be board specific */
> -       clk_set_phase(tcon->dclk, 120);
> -}
> -
>  static struct drm_encoder_helper_funcs sun4i_rgb_enc_helper_funcs = {
> -       .mode_set       = sun4i_rgb_encoder_mode_set,
>         .disable        = sun4i_rgb_encoder_disable,
>         .enable         = sun4i_rgb_encoder_enable,
>  };
> diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
> index 964cf22a1ced..7ecd4f7c8411 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
> @@ -139,7 +139,6 @@ void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel,
>         DRM_DEBUG_DRIVER("Muxing encoder %s to CRTC %s: %d\n",
>                          encoder->name, encoder->crtc->name, ret);
>  }
> -EXPORT_SYMBOL(sun4i_tcon_set_mux);
>
>  static int sun4i_tcon_get_clk_delay(const struct drm_display_mode *mode,
>                                     int channel)
> @@ -159,8 +158,8 @@ static int sun4i_tcon_get_clk_delay(const struct drm_display_mode *mode,
>         return delay;
>  }
>
> -void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
> -                         struct drm_display_mode *mode)
> +static void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
> +                                struct drm_display_mode *mode)

This doesn't have const...

>  {
>         unsigned int bp, hsync, vsync;
>         u8 clk_delay;
> @@ -233,10 +232,9 @@ void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
>         /* Enable the output on the pins */
>         regmap_write(tcon->regs, SUN4I_TCON0_IO_TRI_REG, 0);
>  }
> -EXPORT_SYMBOL(sun4i_tcon0_mode_set);
>
> -void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
> -                         struct drm_display_mode *mode)
> +static void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
> +                                const struct drm_display_mode *mode)
>  {
>         unsigned int bp, hsync, vsync, vtotal;
>         u8 clk_delay;
> @@ -324,7 +322,26 @@ void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
>                            SUN4I_TCON_GCTL_IOMAP_MASK,
>                            SUN4I_TCON_GCTL_IOMAP_TCON1);
>  }
> -EXPORT_SYMBOL(sun4i_tcon1_mode_set);
> +
> +void sun4i_tcon_mode_set(struct sun4i_tcon *tcon,
> +                        const struct drm_encoder *encoder,
> +                        const struct drm_display_mode *mode)

But this does...

> +{
> +       switch (encoder->encoder_type) {
> +       case DRM_MODE_ENCODER_NONE:
> +               sun4i_tcon0_mode_set(tcon, mode);

So you're likely to get some warning about dropping const here.

Otherwise,

Reviewed-by: Chen-Yu Tsai <wens at csie.org>



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