The following unfinished patch introduces the imxdisplay(4) driver
aiming to add HDMI framebuffer support on the armv7/imx6 platform:
imxdisplay0 at simplebus0
imxdisplay0: 240x322
Currently it sets up rasops(9) and adds functions for handling/enabling
the clocks and PLLs for the HDMI transmitter through the control module.
Ian
Index: sys/arch/armv7/conf/GENERIC
===================================================================
RCS file: /cvs/src/sys/arch/armv7/conf/GENERIC,v
retrieving revision 1.31
diff -u -p -r1.31 GENERIC
--- sys/arch/armv7/conf/GENERIC 12 Jul 2016 19:17:49 -0000 1.31
+++ sys/arch/armv7/conf/GENERIC 1 Aug 2016 07:32:00 -0000
@@ -54,6 +54,8 @@ sdmmc* at imxesdhc? # SD/MMC bus
imxahci* at fdt? # AHCI/SATA
imxehci* at fdt? # EHCI
usb* at imxehci?
+imxdisplay* at fdt? # HDMI
+wsdisplay* at imxdisplay?
# OMAP3xxx/OMAP4xxx SoC
omap0 at mainbus?
Index: sys/arch/armv7/imx/files.imx
===================================================================
RCS file: /cvs/src/sys/arch/armv7/imx/files.imx,v
retrieving revision 1.15
diff -u -p -r1.15 files.imx
--- sys/arch/armv7/imx/files.imx 12 Jul 2016 19:17:49 -0000 1.15
+++ sys/arch/armv7/imx/files.imx 1 Aug 2016 07:32:00 -0000
@@ -51,3 +51,8 @@ file arch/armv7/imx/imxesdhc.c imxesdhc
device imxahci: scsi, atascsi
attach imxahci at fdt
file arch/armv7/imx/imxahci.c imxahci
+
+device imxdisplay: wsemuldisplaydev, rasops16
+attach imxdisplay at fdt
+file arch/armv7/imx/imxdisplay.c imxdisplay
+
Index: sys/arch/armv7/imx/imxccm.c
===================================================================
RCS file: /cvs/src/sys/arch/armv7/imx/imxccm.c,v
retrieving revision 1.5
diff -u -p -r1.5 imxccm.c
--- sys/arch/armv7/imx/imxccm.c 30 May 2015 08:09:19 -0000 1.5
+++ sys/arch/armv7/imx/imxccm.c 1 Aug 2016 07:32:00 -0000
@@ -75,6 +75,9 @@
#define CCM_ANALOG_PLL_USB2_SET 0x4024
#define CCM_ANALOG_PLL_USB2_CLR 0x4028
#define CCM_ANALOG_PLL_SYS 0x4030
+#define CCM_ANALOG_PLL_VIDEO 0x40A0
+#define CCM_ANALOG_PLL_VIDEO_SET 0x40A4
+#define CCM_ANALOG_PLL_VIDEO_CLR 0x40A8
#define CCM_ANALOG_USB1_CHRG_DETECT 0x41b0
#define CCM_ANALOG_USB1_CHRG_DETECT_SET 0x41b4
#define CCM_ANALOG_USB1_CHRG_DETECT_CLR 0x41b8
@@ -114,6 +117,8 @@
#define CCM_CSCDR1_UART_PODF_MASK 0x7
#define CCM_CCGR1_ENET (3 << 10)
#define CCM_CCGR2_I2C(x) (3 << (6 + 2*x))
+#define CCM_CCGR2_HDMI_TX_ISFRCLK (3 << 4)
+#define CCM_CCGR2_HDMI_TX_IAHBCLK (3 << 0)
#define CCM_CCGR4_125M_PCIE (3 << 0)
#define CCM_CCGR5_100M_SATA (3 << 4)
#define CCM_CCGR6_USBOH3 (3 << 0)
@@ -151,6 +156,10 @@
#define CCM_PMU_MISC1_LVDSCLK1_CLK_SEL_MASK (0x1f << 0)
#define CCM_PMU_MISC1_LVDSCLK1_OBEN (1 << 10)
#define CCM_PMU_MISC1_LVDSCLK1_IBEN (1 << 12)
+#define CCM_ANALOG_PLL_VIDEO_ENABLE (1 << 13)
+#define CCM_ANALOG_PLL_VIDEO_LOCK (1U << 31)
+#define CCM_ANALOG_PLL_VIDEO_POWERDOWN (1 << 12)
+#define CCM_ANALOG_PLL_VIDEO_BYPASS (1 << 16)
#define HCLK_FREQ 24000
#define PLL3_80M 80000
@@ -220,9 +229,11 @@ void imxccm_disable_usb2_chrg_detect(voi
void imxccm_enable_pll_usb1(void);
void imxccm_enable_pll_usb2(void);
void imxccm_enable_pll_enet(void);
+void imxccm_enable_pll_video(void);
void imxccm_enable_enet(void);
void imxccm_enable_sata(void);
void imxccm_enable_pcie(void);
+void imxccm_enable_hdmi(void);
struct cfattach imxccm_ca = {
sizeof (struct imxccm_softc), NULL, imxccm_attach
@@ -518,6 +529,23 @@ imxccm_enable_pll_enet(void)
}
void
+imxccm_enable_pll_video(void)
+{
+ struct imxccm_softc *sc = imxccm_sc;
+
+ if (HREAD4(sc, CCM_ANALOG_PLL_VIDEO) & CCM_ANALOG_PLL_VIDEO_ENABLE)
+ return;
+
+ HCLR4(sc, CCM_ANALOG_PLL_VIDEO, CCM_ANALOG_PLL_VIDEO_POWERDOWN);
+
+ HSET4(sc, CCM_ANALOG_PLL_VIDEO, CCM_ANALOG_PLL_VIDEO_ENABLE);
+
+ while(!(HREAD4(sc, CCM_ANALOG_PLL_VIDEO) & CCM_ANALOG_PLL_VIDEO_LOCK));
+
+ HCLR4(sc, CCM_ANALOG_PLL_VIDEO, CCM_ANALOG_PLL_VIDEO_BYPASS);
+}
+
+void
imxccm_enable_enet(void)
{
struct imxccm_softc *sc = imxccm_sc;
@@ -554,6 +582,16 @@ imxccm_enable_pcie(void)
HWRITE4(sc, CCM_ANALOG_PLL_ENET_SET, CCM_ANALOG_PLL_ENET_125M_PCIE);
HSET4(sc, CCM_CCGR4, CCM_CCGR4_125M_PCIE);
+}
+
+void
+imxccm_enable_hdmi(void)
+{
+ struct imxccm_softc *sc = imxccm_sc;
+
+ imxccm_enable_pll_video();
+ HSET4(sc, CCM_CCGR2, CCM_CCGR2_HDMI_TX_ISFRCLK);
+ HSET4(sc, CCM_CCGR2, CCM_CCGR2_HDMI_TX_IAHBCLK);
}
void
Index: sys/arch/armv7/imx/imxccmvar.h
===================================================================
RCS file: /cvs/src/sys/arch/armv7/imx/imxccmvar.h,v
retrieving revision 1.2
diff -u -p -r1.2 imxccmvar.h
--- sys/arch/armv7/imx/imxccmvar.h 30 May 2015 08:09:19 -0000 1.2
+++ sys/arch/armv7/imx/imxccmvar.h 1 Aug 2016 07:32:00 -0000
@@ -32,5 +32,6 @@ void imxccm_enable_pll_usb2(void);
void imxccm_enable_enet(void);
void imxccm_enable_sata(void);
void imxccm_enable_pcie(void);
+void imxccm_enable_hdmi(void);
#endif /* IMXCCMVAR_H */
Index: sys/arch/armv7/imx/imxdisplay.c
===================================================================
RCS file: sys/arch/armv7/imx/imxdisplay.c
diff -N sys/arch/armv7/imx/imxdisplay.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ sys/arch/armv7/imx/imxdisplay.c 1 Aug 2016 07:32:00 -0000
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2016 Ian Sutton <i...@kremlin.cc>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/queue.h>
+#include <sys/malloc.h>
+#include <sys/device.h>
+#include <sys/evcount.h>
+#include <sys/conf.h>
+#include <sys/uio.h>
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/cons.h>
+#include <dev/wscons/wsconsio.h>
+#include <dev/wscons/wsdisplayvar.h>
+#include <dev/wscons/wscons_callbacks.h>
+#include <dev/rasops/rasops.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_gpio.h>
+#include <dev/ofw/fdt.h>
+
+struct imxdisplay_screen {
+ LIST_ENTRY(imxdisplay_screen) link;
+
+ size_t buf_size;
+ size_t map_size;
+ void *buf_va;
+ int depth;
+ struct rasops_info rinfo;
+
+};
+
+struct imxdisplay_softc {
+ struct device sc_dev;
+ bus_space_tag_t sc_iot;
+ bus_space_handle_t sc_ioh;
+ struct rasops_info *ro;
+};
+
+int imxdisplay_match(struct device *, void *, void *a);
+void imxdisplay_attach(struct device *, struct device *, void *);
+int imxdisplay_activate(struct device *, int);
+
+int imxdisplay_ioctl(void *, u_long, caddr_t, int, struct proc *);
+int imxdisplay_alloc_screen(void *, const struct wsscreen_descr *,
+ void **, int *, int *, long *);
+void imxdisplay_free_screen(void *, void *);
+int imxdisplay_show_screen(void *, void *, int,
+ void (*)(void *, int, int), void *);
+void imxdisplay_doswitch(void *, void *);
+int imxdisplay_load_font(void *, void *, struct wsdisplay_font *);
+int imxdisplay_list_font(void *, struct wsdisplay_font *);
+int imxdisplay_getchar(void *, int, int, struct wsdisplay_charcell *);
+void imxdisplay_burner(void *, u_int, u_int);
+paddr_t imxdisplay_mmap(void *, off_t, int);
+
+void imxdisplay_setup_rasops(struct imxdisplay_softc *, struct rasops_info *);
+
+struct wsdisplay_accessops imxdisplay_accessops = {
+ .ioctl = imxdisplay_ioctl,
+ .mmap = imxdisplay_mmap,
+ .alloc_screen = imxdisplay_alloc_screen,
+ .free_screen = imxdisplay_free_screen,
+ .show_screen = imxdisplay_show_screen,
+ .getchar = imxdisplay_getchar,
+ .load_font = imxdisplay_load_font,
+ .list_font = imxdisplay_list_font,
+ .burn_screen = imxdisplay_burner
+};
+
+struct cfattach imxdisplay_ca = {
+ sizeof(struct imxdisplay_softc), imxdisplay_match, imxdisplay_attach,
NULL,
+ imxdisplay_activate
+};
+
+struct cfdriver imxdisplay_cd = {
+ NULL, "imxdisplay", DV_DULL
+};
+
+struct rasops_info imxdisplay_ri;
+struct wsscreen_descr imxdisplay_stdscreen = {
+ "std"
+};
+
+const struct wsscreen_descr *imxdisplay_scrlist[] = {
+ &imxdisplay_stdscreen,
+};
+
+struct wsscreen_list imxdisplay_screenlist = {
+ nitems(imxdisplay_scrlist), imxdisplay_scrlist
+};
+
+int
+imxdisplay_match(struct device *parent, void *v, void *aux)
+{
+ struct fdt_attach_args *faa = aux;
+ return OF_is_compatible(faa->fa_node, "fsl,imx6q-hdmi");
+}
+
+void
+imxdisplay_attach(struct device *parent, struct device *self, void *args)
+{
+ struct imxdisplay_softc *sc = (struct imxdisplay_softc *) self;
+ struct fdt_attach_args *faa = args;
+ struct wsemuldisplaydev_attach_args wsaa;
+ struct rasops_info *ri = &imxdisplay_ri;
+
+ sc->sc_iot = faa->fa_iot;
+ if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
+ faa->fa_reg[1].size, 0, &sc->sc_ioh))
+ panic("%s: bus_space_map failed!", __func__);
+
+ printf("\n");
+
+ imxdisplay_setup_rasops(sc, ri);
+ sc->ro = ri;
+
+ wsaa.console = 0;
+ wsaa.scrdata = &imxdisplay_screenlist;
+ wsaa.accessops = &imxdisplay_accessops;
+ wsaa.accesscookie = sc;
+ wsaa.defaultscreens = 0;
+
+ printf("%s: %dx%d\n", sc->sc_dev.dv_xname, ri->ri_width, ri->ri_height);
+
+ config_found(self, &wsaa, wsemuldisplaydevprint);
+}
+
+void
+imxdisplay_setup_rasops(struct imxdisplay_softc *sc, struct rasops_info *rinfo)
+{
+ /* XXX dummy data for now */
+ rinfo->ri_depth = 16;
+ rinfo->ri_width = 240;
+ rinfo->ri_height = 322;
+ rinfo->ri_stride = 240 * 16;
+
+ rasops_init(rinfo, 100, 100);
+}
+
+int
+imxdisplay_activate(struct device *self, int act)
+{
+ /* XXX */
+ switch (act) {
+ case DVACT_SUSPEND:
+ break;
+ case DVACT_RESUME:
+ break;
+ }
+
+ return 0;
+}
+int
+imxdisplay_ioctl(void *sconf, u_long cmd, caddr_t data, int flat, struct proc
*p)
+{
+ return -1;
+}
+
+paddr_t
+imxdisplay_mmap(void *sconf, off_t off, int prot)
+{
+ return -1;
+}
+
+int
+imxdisplay_alloc_screen(void *sconf, const struct wsscreen_descr *type,
+ void **cookiep, int *curxp, int *curyp, long *attrp)
+{
+ struct imxdisplay_softc *sc = sconf;
+ struct rasops_info *ri = sc->ro;
+
+ return rasops_alloc_screen(ri, cookiep, curxp, curyp, attrp);
+}
+
+void
+imxdisplay_free_screen(void *sconf, void *cookie)
+{
+ struct imxdisplay_softc *sc = sconf;
+ struct rasops_info *ri = sc->ro;
+
+ return rasops_free_screen(ri, cookie);
+}
+
+int
+imxdisplay_show_screen(void *sconf, void *cookie, int waitok,
+ void (*cb)(void *, int, int), void *cbarg)
+{
+ return (0);
+}
+
+void
+imxdisplay_doswitch(void *v, void *dummy)
+{
+}
+
+int
+imxdisplay_getchar(void *sconf, int row, int col, struct wsdisplay_charcell
*cell)
+{
+ struct imxdisplay_softc *sc = sconf;
+ struct rasops_info *ri = sc->ro;
+
+ return rasops_getchar(ri, row, col, cell);
+}
+
+int
+imxdisplay_load_font(void *sconf, void *cookie, struct wsdisplay_font *font)
+{
+ struct imxdisplay_softc *sc = sconf;
+ struct rasops_info *ri = sc->ro;
+
+ return rasops_load_font(ri, cookie, font);
+}
+
+int
+imxdisplay_list_font(void *sconf, struct wsdisplay_font *font)
+{
+ struct imxdisplay_softc *sc = sconf;
+ struct rasops_info *ri = sc->ro;
+
+ return rasops_list_font(ri, font);
+}
+
+void
+imxdisplay_burner(void *sconf, u_int on, u_int flags)
+{
+}
