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[v2,36/41] drm/sun4i: tv: Merge mode_set into atomic_enable

Message ID 20220728-rpi-analog-tv-properties-v2-36-459522d653a7@cerno.tech (mailing list archive)
State New, archived
Headers show
Series drm: Analog TV Improvements | expand

Commit Message

Maxime Ripard Aug. 29, 2022, 1:11 p.m. UTC 
Our mode_set implementation can be merged into our atomic_enable
implementation to simplify things, so let's do this.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Comments

Jernej Škrabec Sept. 6, 2022, 8:04 p.m. UTC | #1 
Dne ponedeljek, 29. avgust 2022 ob 15:11:50 CEST je Maxime Ripard napisal(a):
> Our mode_set implementation can be merged into our atomic_enable
> implementation to simplify things, so let's do this.

Are you sure this is a good thing in long term? What if user wants to change 
mode? Unlikely, but why not.

Best regards,
Jernej

> 
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> 
> diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c
> b/drivers/gpu/drm/sun4i/sun4i_tv.c
> index f7aad995ab5b..3944da9a3c34 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_tv.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_tv.c
> @@ -359,23 +359,13 @@ static void sun4i_tv_enable(struct drm_encoder
> *encoder,
 {
>  	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
>  	struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
> -
> -	DRM_DEBUG_DRIVER("Enabling the TV Output\n");
> -
> -	sunxi_engine_apply_color_correction(crtc->engine);
> -
> -	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
> -			   SUN4I_TVE_EN_ENABLE,
> -			   SUN4I_TVE_EN_ENABLE);
> -}
> -
> -static void sun4i_tv_mode_set(struct drm_encoder *encoder,
> -			      struct drm_display_mode *mode,
> -			      struct drm_display_mode 
*adjusted_mode)
> -{
> -	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
> +	struct drm_crtc_state *crtc_state =
> +		drm_atomic_get_new_crtc_state(state, encoder->crtc);
> +	struct drm_display_mode *mode = &crtc_state->mode;
>  	const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
>  
> +	DRM_DEBUG_DRIVER("Enabling the TV Output\n");
> +
>  	/* Enable and map the DAC to the output */
>  	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
>  			   SUN4I_TVE_EN_DAC_MAP_MASK,
> @@ -468,12 +458,17 @@ static void sun4i_tv_mode_set(struct drm_encoder
> *encoder,
> SUN4I_TVE_RESYNC_FIELD : 0));
>  
>  	regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
> +
> +	sunxi_engine_apply_color_correction(crtc->engine);
> +
> +	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
> +			   SUN4I_TVE_EN_ENABLE,
> +			   SUN4I_TVE_EN_ENABLE);
>  }
>  
>  static const struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
>  	.atomic_disable	= sun4i_tv_disable,
>  	.atomic_enable	= sun4i_tv_enable,
> -	.mode_set	= sun4i_tv_mode_set,
>  };
>  
>  static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
> 
> -- 
> b4 0.10.0-dev-65ba7
Maxime Ripard Sept. 7, 2022, 7:41 a.m. UTC | #2 
On Tue, Sep 06, 2022 at 10:04:32PM +0200, Jernej Škrabec wrote:
> Dne ponedeljek, 29. avgust 2022 ob 15:11:50 CEST je Maxime Ripard napisal(a):
> > Our mode_set implementation can be merged into our atomic_enable
> > implementation to simplify things, so let's do this.
> 
> Are you sure this is a good thing in long term? What if user wants to change 
> mode? Unlikely, but why not.

It doesn't change anything feature-wise: whenever the mode is changed on
the CRTC, the encoder is going to be disabled and enabled.

It's disabled here:
https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_atomic_helper.c#L1064

And enabled here:
https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_atomic_helper.c#L1403

With drm_atomic_crtc_needs_modeset() being defined here:
https://elixir.bootlin.com/linux/latest/source/include/drm/drm_atomic.h#L1049

Maxime
Jernej Škrabec Sept. 7, 2022, 3:09 p.m. UTC | #3 
Dne sreda, 07. september 2022 ob 09:41:34 CEST je Maxime Ripard napisal(a):
> On Tue, Sep 06, 2022 at 10:04:32PM +0200, Jernej Škrabec wrote:
> > Dne ponedeljek, 29. avgust 2022 ob 15:11:50 CEST je Maxime Ripard 
napisal(a):
> > > Our mode_set implementation can be merged into our atomic_enable
> > > implementation to simplify things, so let's do this.
> > 
> > Are you sure this is a good thing in long term? What if user wants to
> > change mode? Unlikely, but why not.
> 
> It doesn't change anything feature-wise: whenever the mode is changed on
> the CRTC, the encoder is going to be disabled and enabled.
> 
> It's disabled here:
> https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_atomic_he
> lper.c#L1064
> 
> And enabled here:
> https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_atomic_he
> lper.c#L1403
> 
> With drm_atomic_crtc_needs_modeset() being defined here:
> https://elixir.bootlin.com/linux/latest/source/include/drm/drm_atomic.h#L104
> 9

Right.

Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej
Maxime Ripard Sept. 8, 2022, 2:02 p.m. UTC | #4 
On Mon, 29 Aug 2022 15:11:50 +0200, Maxime Ripard wrote:
> Our mode_set implementation can be merged into our atomic_enable
> implementation to simplify things, so let's do this.
> 
> 

Applied to drm/drm-misc (drm-misc-next).

Thanks!
Maxime
diff mbox series

Patch

diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c
index f7aad995ab5b..3944da9a3c34 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tv.c
@@ -359,23 +359,13 @@  static void sun4i_tv_enable(struct drm_encoder *encoder,
 {
 	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
 	struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
-
-	DRM_DEBUG_DRIVER("Enabling the TV Output\n");
-
-	sunxi_engine_apply_color_correction(crtc->engine);
-
-	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
-			   SUN4I_TVE_EN_ENABLE,
-			   SUN4I_TVE_EN_ENABLE);
-}
-
-static void sun4i_tv_mode_set(struct drm_encoder *encoder,
-			      struct drm_display_mode *mode,
-			      struct drm_display_mode *adjusted_mode)
-{
-	struct sun4i_tv *tv = drm_encoder_to_sun4i_tv(encoder);
+	struct drm_crtc_state *crtc_state =
+		drm_atomic_get_new_crtc_state(state, encoder->crtc);
+	struct drm_display_mode *mode = &crtc_state->mode;
 	const struct tv_mode *tv_mode = sun4i_tv_find_tv_by_mode(mode);
 
+	DRM_DEBUG_DRIVER("Enabling the TV Output\n");
+
 	/* Enable and map the DAC to the output */
 	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
 			   SUN4I_TVE_EN_DAC_MAP_MASK,
@@ -468,12 +458,17 @@  static void sun4i_tv_mode_set(struct drm_encoder *encoder,
 		      SUN4I_TVE_RESYNC_FIELD : 0));
 
 	regmap_write(tv->regs, SUN4I_TVE_SLAVE_REG, 0);
+
+	sunxi_engine_apply_color_correction(crtc->engine);
+
+	regmap_update_bits(tv->regs, SUN4I_TVE_EN_REG,
+			   SUN4I_TVE_EN_ENABLE,
+			   SUN4I_TVE_EN_ENABLE);
 }
 
 static const struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
 	.atomic_disable	= sun4i_tv_disable,
 	.atomic_enable	= sun4i_tv_enable,
-	.mode_set	= sun4i_tv_mode_set,
 };
 
 static int sun4i_tv_comp_get_modes(struct drm_connector *connector)