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SubjectRe: [PATCH v5 1/3] drm/ingenic : add ingenic_drm_bridge_atomic_enable and disable
On 2022-03-21 14:36, Christophe Branchereau wrote:
Hi Christophe,

looks good to me.

Cheers,
Artur

Acked-by: Artur Rojek <contact@artur-rojek.eu>

> ingenic_drm_bridge_atomic_enable allows the CRTC to be enabled after
> panels have slept out, and before their display is turned on, solving
> a graphical bug on the newvision nv3502c.
>
> Also add ingenic_drm_bridge_atomic_disable to balance it out.
>
> Signed-off-by: Christophe Branchereau <cbranchereau@gmail.com>
> ---
> drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 34 +++++++++++++++--------
> 1 file changed, 23 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
> b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
> index dcf44cb00821..2bbfd2e7fdab 100644
> --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
> +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
> @@ -226,6 +226,18 @@ static int ingenic_drm_update_pixclk(struct
> notifier_block *nb,
> }
> }
>
> +static void ingenic_drm_bridge_atomic_enable(struct drm_bridge
> *bridge,
> + struct drm_bridge_state *old_bridge_state)
> +{
> + struct ingenic_drm *priv = drm_device_get_priv(bridge->dev);
> +
> + regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
> +
> + regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
> + JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE,
> + JZ_LCD_CTRL_ENABLE);
> +}
> +
> static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
> struct drm_atomic_state *state)
> {
> @@ -237,28 +249,20 @@ static void
> ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
> if (WARN_ON(IS_ERR(priv_state)))
> return;
>
> - regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
> -
> /* Set addresses of our DMA descriptor chains */
> next_id = priv_state->use_palette ? HWDESC_PALETTE : 0;
> regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv,
> next_id));
> regmap_write(priv->map, JZ_REG_LCD_DA1, dma_hwdesc_addr(priv, 1));
>
> - regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
> - JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE,
> - JZ_LCD_CTRL_ENABLE);
> -
> drm_crtc_vblank_on(crtc);
> }
>
> -static void ingenic_drm_crtc_atomic_disable(struct drm_crtc *crtc,
> - struct drm_atomic_state *state)
> +static void ingenic_drm_bridge_atomic_disable(struct drm_bridge
> *bridge,
> + struct drm_bridge_state *old_bridge_state)
> {
> - struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
> + struct ingenic_drm *priv = drm_device_get_priv(bridge->dev);
> unsigned int var;
>
> - drm_crtc_vblank_off(crtc);
> -
> regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
> JZ_LCD_CTRL_DISABLE, JZ_LCD_CTRL_DISABLE);
>
> @@ -267,6 +271,12 @@ static void
> ingenic_drm_crtc_atomic_disable(struct drm_crtc *crtc,
> 1000, 0);
> }
>
> +static void ingenic_drm_crtc_atomic_disable(struct drm_crtc *crtc,
> + struct drm_atomic_state *state)
> +{
> + drm_crtc_vblank_off(crtc);
> +}
> +
> static void ingenic_drm_crtc_update_timings(struct ingenic_drm *priv,
> struct drm_display_mode *mode)
> {
> @@ -968,6 +978,8 @@ static const struct drm_encoder_helper_funcs
> ingenic_drm_encoder_helper_funcs =
>
> static const struct drm_bridge_funcs ingenic_drm_bridge_funcs = {
> .attach = ingenic_drm_bridge_attach,
> + .atomic_enable = ingenic_drm_bridge_atomic_enable,
> + .atomic_disable = ingenic_drm_bridge_atomic_disable,
> .atomic_check = ingenic_drm_bridge_atomic_check,
> .atomic_reset = drm_atomic_helper_bridge_reset,
> .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,

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