Commit d50141d8 authored by Russell King's avatar Russell King Committed by Philipp Zabel
Browse files

imx-drm: core: handling of DI clock flags to ipu_crtc_mode_set() 



We do not need to track the state of the IPU DI's clock flags by having
each display bridge calling back into imx-drm-core, and then back out
into ipuv3-crtc.c.

ipuv3-crtc can instead just scan the list of encoders to retrieve their
type, and build up a picture of which types of encoders are attached.
We can then use this information to configure the IPU DI clocking mode
without any uncertainty - if we have multiple bridges connected to the
same DI, if one of them requires a synchronous DI clock, that's what we
must use.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 503f1631

drivers/gpu/drm/imx/imx-drm-core.c

+1 −2
Original line number Diff line number Diff line
@@ -116,8 +116,7 @@ int imx_drm_panel_format_pins(struct drm_encoder *encoder, 
	helper = &imx_crtc->imx_drm_helper_funcs;

	if (helper->set_interface_pix_fmt)

		return helper->set_interface_pix_fmt(encoder->crtc,

				encoder->encoder_type, interface_pix_fmt,

				hsync_pin, vsync_pin);

				interface_pix_fmt, hsync_pin, vsync_pin);

	return 0;

}

EXPORT_SYMBOL_GPL(imx_drm_panel_format_pins);

drivers/gpu/drm/imx/imx-drm.h

+1 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ int imx_drm_crtc_id(struct imx_drm_crtc *crtc); 
struct imx_drm_crtc_helper_funcs {

	int (*enable_vblank)(struct drm_crtc *crtc);

	void (*disable_vblank)(struct drm_crtc *crtc);

	int (*set_interface_pix_fmt)(struct drm_crtc *crtc, u32 encoder_type,

	int (*set_interface_pix_fmt)(struct drm_crtc *crtc,

			u32 pix_fmt, int hsync_pin, int vsync_pin);

	const struct drm_crtc_helper_funcs *crtc_helper_funcs;

	const struct drm_crtc_funcs *crtc_funcs;

drivers/gpu/drm/imx/ipuv3-crtc.c

+23 −17
Original line number Diff line number Diff line
@@ -46,7 +46,6 @@ struct ipu_crtc { 
	struct drm_framebuffer	*newfb;

	int			irq;

	u32			interface_pix_fmt;

	unsigned long		di_clkflags;

	int			di_hsync_pin;

	int			di_vsync_pin;

};
@@ -141,22 +140,42 @@ static int ipu_crtc_mode_set(struct drm_crtc *crtc, 
			       int x, int y,

			       struct drm_framebuffer *old_fb)

{

	struct drm_device *dev = crtc->dev;

	struct drm_encoder *encoder;

	struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);

	int ret;

	struct ipu_di_signal_cfg sig_cfg = {};

	unsigned long encoder_types = 0;

	u32 out_pixel_fmt;

	int ret;



	dev_dbg(ipu_crtc->dev, "%s: mode->hdisplay: %d\n", __func__,

			mode->hdisplay);

	dev_dbg(ipu_crtc->dev, "%s: mode->vdisplay: %d\n", __func__,

			mode->vdisplay);



	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)

		if (encoder->crtc == crtc)

			encoder_types |= BIT(encoder->encoder_type);



	dev_dbg(ipu_crtc->dev, "%s: attached to encoder types 0x%lx\n",

		__func__, encoder_types);



	/*

	 * If we have DAC, TVDAC or LDB, then we need the IPU DI clock

	 * to be the same as the LDB DI clock.

	 */

	if (encoder_types & (BIT(DRM_MODE_ENCODER_DAC) |

			     BIT(DRM_MODE_ENCODER_TVDAC) |

			     BIT(DRM_MODE_ENCODER_LVDS)))

		sig_cfg.clkflags = IPU_DI_CLKMODE_SYNC | IPU_DI_CLKMODE_EXT;

	else

		sig_cfg.clkflags = 0;



	out_pixel_fmt = ipu_crtc->interface_pix_fmt;



	sig_cfg.enable_pol = 1;

	sig_cfg.clk_pol = 0;

	sig_cfg.pixel_fmt = out_pixel_fmt;

	sig_cfg.clkflags = ipu_crtc->di_clkflags;

	sig_cfg.v_to_h_sync = 0;

	sig_cfg.hsync_pin = ipu_crtc->di_hsync_pin;

	sig_cfg.vsync_pin = ipu_crtc->di_vsync_pin;
@@ -271,7 +290,7 @@ static void ipu_disable_vblank(struct drm_crtc *crtc) 
	ipu_crtc->newfb = NULL;

}



static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type,

static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc,

		u32 pixfmt, int hsync_pin, int vsync_pin)

{

	struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
@@ -280,19 +299,6 @@ static int ipu_set_interface_pix_fmt(struct drm_crtc *crtc, u32 encoder_type, 
	ipu_crtc->di_hsync_pin = hsync_pin;

	ipu_crtc->di_vsync_pin = vsync_pin;



	switch (encoder_type) {

	case DRM_MODE_ENCODER_DAC:

	case DRM_MODE_ENCODER_TVDAC:

	case DRM_MODE_ENCODER_LVDS:

		ipu_crtc->di_clkflags = IPU_DI_CLKMODE_SYNC |

			IPU_DI_CLKMODE_EXT;

		break;

	case DRM_MODE_ENCODER_TMDS:

	case DRM_MODE_ENCODER_NONE:

		ipu_crtc->di_clkflags = 0;

		break;

	}



	return 0;

}

CRA Git | Maintained and supported by SUSTech CRA and CCSE