Commit dba8e987 authored by Paul Cercueil's avatar Paul Cercueil
Browse files

DRM: ingenic: Add support for Sharp panels 



Add support for the LCD panels that must be driven with the
Sharp-specific signals SPL, CLS, REV, PS.

An example of such panel is the LS020B1DD01D supported by the
panel-simple DRM panel driver.

Signed-off-by: default avatarPaul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190627182114.27299-2-paul@crapouillou.net


# *** extracted tags ***
Reviewed-by: default avatarSam Ravnborg <sam@ravnborg.org>
parent ffa8aa00

drivers/gpu/drm/ingenic/ingenic-drm.c

+41 −23
Original line number Diff line number Diff line
@@ -166,6 +166,8 @@ struct ingenic_drm { 


	struct ingenic_dma_hwdesc *dma_hwdesc;

	dma_addr_t dma_hwdesc_phys;



	bool panel_is_sharp;

};



static const u32 ingenic_drm_primary_formats[] = {
@@ -283,6 +285,13 @@ static void ingenic_drm_crtc_update_timings(struct ingenic_drm *priv, 
	regmap_write(priv->map, JZ_REG_LCD_DAV,

		     vds << JZ_LCD_DAV_VDS_OFFSET |

		     vde << JZ_LCD_DAV_VDE_OFFSET);



	if (priv->panel_is_sharp) {

		regmap_write(priv->map, JZ_REG_LCD_PS, hde << 16 | (hde + 1));

		regmap_write(priv->map, JZ_REG_LCD_CLS, hde << 16 | (hde + 1));

		regmap_write(priv->map, JZ_REG_LCD_SPL, hpe << 16 | (hpe + 1));

		regmap_write(priv->map, JZ_REG_LCD_REV, mode->htotal << 16);

	}

}



static void ingenic_drm_crtc_update_ctrl(struct ingenic_drm *priv,
@@ -378,11 +387,18 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder, 
{

	struct ingenic_drm *priv = drm_encoder_get_priv(encoder);

	struct drm_display_mode *mode = &crtc_state->adjusted_mode;

	struct drm_display_info *info = &conn_state->connector->display_info;

	unsigned int cfg = JZ_LCD_CFG_PS_DISABLE

			 | JZ_LCD_CFG_CLS_DISABLE

			 | JZ_LCD_CFG_SPL_DISABLE

			 | JZ_LCD_CFG_REV_DISABLE;

	struct drm_connector *conn = conn_state->connector;

	struct drm_display_info *info = &conn->display_info;

	unsigned int cfg;



	priv->panel_is_sharp = info->bus_flags & DRM_BUS_FLAG_SHARP_SIGNALS;



	if (priv->panel_is_sharp) {

		cfg = JZ_LCD_CFG_MODE_SPECIAL_TFT_1 | JZ_LCD_CFG_REV_POLARITY;

	} else {

		cfg = JZ_LCD_CFG_PS_DISABLE | JZ_LCD_CFG_CLS_DISABLE

		    | JZ_LCD_CFG_SPL_DISABLE | JZ_LCD_CFG_REV_DISABLE;

	}



	if (mode->flags & DRM_MODE_FLAG_NHSYNC)

		cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW;
@@ -393,7 +409,8 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder, 
	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE)

		cfg |= JZ_LCD_CFG_PCLK_FALLING_EDGE;



	if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV) {

	if (!priv->panel_is_sharp) {

		if (conn->connector_type == DRM_MODE_CONNECTOR_TV) {

			if (mode->flags & DRM_MODE_FLAG_INTERLACE)

				cfg |= JZ_LCD_CFG_MODE_TV_OUT_I;

			else
@@ -413,6 +430,7 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder, 
				break;

			}

		}

	}



	regmap_write(priv->map, JZ_REG_LCD_CFG, cfg);

}

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