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drm/sun4i: tcon: Add variant callback for TCON output muxing 

Different SoCs have different muxing options and values for the TCON
outputs. Instead of stuffing every possibility in sun4i_tcon_set_mux(),
add a callback pointer to sun4i_tcon_quirks that each TCON variant
can use to provide muxing support.

The current muxing options in sun4i_tcon_set_mux() for sun5i-a13 are
moved to a new sun5i-specific callback function.

Since the new callback replaces what the .has_unknown_mux field in
tcon quirks did in the past, the field is removed.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171010032008.682-2-wens@csie.org
hifive-unleashed-5.1
Chen-Yu Tsai 2017-10-10 11:19:58 +08:00 committed by Maxime Ripard
parent d5532f65e0
commit ad537fb2ab
2 changed files with 32 additions and 18 deletions
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44
drivers/gpu/drm/sun4i/sun4i_tcon.c
View File

@ -14,9 +14,12 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_encoder.h>
#include <drm/drm_modes.h>
#include <drm/drm_of.h>
#include <uapi/drm/drm_mode.h>
#include <linux/component.h>
#include <linux/ioport.h>
#include <linux/of_address.h>
@ -112,23 +115,13 @@ EXPORT_SYMBOL(sun4i_tcon_enable_vblank);
void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel,
struct drm_encoder *encoder)
{
u32 val;
int ret = -ENOTSUPP;
if (!tcon->quirks->has_unknown_mux)
return;
if (tcon->quirks->set_mux)
ret = tcon->quirks->set_mux(tcon, encoder);
if (channel != 1)
return;
if (encoder->encoder_type == DRM_MODE_ENCODER_TVDAC)
val = 1;
else
val = 0;
/*
* FIXME: Undocumented bits
*/
regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, val);
DRM_DEBUG_DRIVER("Muxing encoder %s to CRTC %s: %d\n",
encoder->name, encoder->crtc->name, ret);
}
EXPORT_SYMBOL(sun4i_tcon_set_mux);
@ -767,9 +760,26 @@ static int sun4i_tcon_remove(struct platform_device *pdev)
return 0;
}
/* platform specific TCON muxing callbacks */
static int sun5i_a13_tcon_set_mux(struct sun4i_tcon *tcon,
struct drm_encoder *encoder)
{
u32 val;
if (encoder->encoder_type == DRM_MODE_ENCODER_TVDAC)
val = 1;
else
val = 0;
/*
* FIXME: Undocumented bits
*/
return regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, val);
}
static const struct sun4i_tcon_quirks sun5i_a13_quirks = {
.has_unknown_mux = true,
.has_channel_1 = true,
.has_channel_1 = true,
.set_mux = sun5i_a13_tcon_set_mux,
};
static const struct sun4i_tcon_quirks sun6i_a31_quirks = {

6
drivers/gpu/drm/sun4i/sun4i_tcon.h
View File

@ -145,10 +145,14 @@
#define SUN4I_TCON_MAX_CHANNELS 2
struct sun4i_tcon;
struct sun4i_tcon_quirks {
bool has_unknown_mux; /* sun5i has undocumented mux */
bool has_channel_1; /* a33 does not have channel 1 */
bool needs_de_be_mux; /* sun6i needs mux to select backend */
/* callback to handle tcon muxing options */
int (*set_mux)(struct sun4i_tcon *, struct drm_encoder *);
};
struct sun4i_tcon {