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Merge tag 'drm-vc4-fixes-2016-03-03' of github.com:anholt/linux into drm-next

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This pull request fixes the major VC4 HDMI modesetting bugs found when
the first wave of users showed up in Raspbian.

* tag 'drm-vc4-fixes-2016-03-03' of github.com:anholt/linux:
  drm/vc4: Initialize scaler DISPBKGND on modeset.
  drm/vc4: Fix setting of vertical timings in the CRTC.
  drm/vc4: Fix the name of the VSYNCD_EVEN register.
  drm/vc4: Add another reg to HDMI debug dumping.
  drm/vc4: Bring HDMI up from power off if necessary.
  drm/vc4: Fix a framebuffer reference leak on async flip interrupt.
This commit is contained in:
Dave Airlie 2016-03-14 09:48:04 +10:00
commit 67d1c0a25c
3 changed files with 64 additions and 3 deletions
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19
drivers/gpu/drm/vc4/vc4_crtc.c
View File

@ -88,7 +88,7 @@ static const struct {
} crtc_regs[] = {
CRTC_REG(PV_CONTROL),
CRTC_REG(PV_V_CONTROL),
CRTC_REG(PV_VSYNCD),
CRTC_REG(PV_VSYNCD_EVEN),
CRTC_REG(PV_HORZA),
CRTC_REG(PV_HORZB),
CRTC_REG(PV_VERTA),
@ -188,6 +188,8 @@ static int vc4_get_clock_select(struct drm_crtc *crtc)
static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_crtc_state *state = crtc->state;
struct drm_display_mode *mode = &state->adjusted_mode;
@ -217,6 +219,16 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
PV_HORZB_HFP) |
VC4_SET_FIELD(mode->hdisplay, PV_HORZB_HACTIVE));
CRTC_WRITE(PV_VERTA,
VC4_SET_FIELD(mode->vtotal - mode->vsync_end,
PV_VERTA_VBP) |
VC4_SET_FIELD(mode->vsync_end - mode->vsync_start,
PV_VERTA_VSYNC));
CRTC_WRITE(PV_VERTB,
VC4_SET_FIELD(mode->vsync_start - mode->vdisplay,
PV_VERTB_VFP) |
VC4_SET_FIELD(vactive, PV_VERTB_VACTIVE));
if (interlace) {
CRTC_WRITE(PV_VERTA_EVEN,
VC4_SET_FIELD(mode->vtotal - mode->vsync_end - 1,
@ -246,6 +258,10 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
PV_CONTROL_FIFO_CLR |
PV_CONTROL_EN);
HVS_WRITE(SCALER_DISPBKGNDX(vc4_crtc->channel),
SCALER_DISPBKGND_AUTOHS |
(interlace ? SCALER_DISPBKGND_INTERLACE : 0));
if (debug_dump_regs) {
DRM_INFO("CRTC %d regs after:\n", drm_crtc_index(crtc));
vc4_crtc_dump_regs(vc4_crtc);
@ -527,6 +543,7 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
/* Make sure all other async modesetes have landed. */
ret = down_interruptible(&vc4->async_modeset);
if (ret) {
drm_framebuffer_unreference(fb);
kfree(flip_state);
return ret;
}

30
drivers/gpu/drm/vc4/vc4_hdmi.c
View File

@ -95,6 +95,7 @@ static const struct {
HDMI_REG(VC4_HDMI_SW_RESET_CONTROL),
HDMI_REG(VC4_HDMI_HOTPLUG_INT),
HDMI_REG(VC4_HDMI_HOTPLUG),
HDMI_REG(VC4_HDMI_RAM_PACKET_CONFIG),
HDMI_REG(VC4_HDMI_HORZA),
HDMI_REG(VC4_HDMI_HORZB),
HDMI_REG(VC4_HDMI_FIFO_CTL),
@ -495,6 +496,16 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
goto err_put_i2c;
}
/* This is the rate that is set by the firmware. The number
* needs to be a bit higher than the pixel clock rate
* (generally 148.5Mhz).
*/
ret = clk_set_rate(hdmi->hsm_clock, 163682864);
if (ret) {
DRM_ERROR("Failed to set HSM clock rate: %d\n", ret);
goto err_unprepare_pix;
}
ret = clk_prepare_enable(hdmi->hsm_clock);
if (ret) {
DRM_ERROR("Failed to turn on HDMI state machine clock: %d\n",
@ -516,7 +527,24 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
vc4->hdmi = hdmi;
/* HDMI core must be enabled. */
WARN_ON_ONCE((HD_READ(VC4_HD_M_CTL) & VC4_HD_M_ENABLE) == 0);
if (!(HD_READ(VC4_HD_M_CTL) & VC4_HD_M_ENABLE)) {
HD_WRITE(VC4_HD_M_CTL, VC4_HD_M_SW_RST);
udelay(1);
HD_WRITE(VC4_HD_M_CTL, 0);
HD_WRITE(VC4_HD_M_CTL, VC4_HD_M_ENABLE);
HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL,
VC4_HDMI_SW_RESET_HDMI |
VC4_HDMI_SW_RESET_FORMAT_DETECT);
HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL, 0);
/* PHY should be in reset, like
* vc4_hdmi_encoder_disable() does.
*/
HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
}
drm_encoder_init(drm, hdmi->encoder, &vc4_hdmi_encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);

18
drivers/gpu/drm/vc4/vc4_regs.h
View File

@ -187,7 +187,7 @@
# define PV_VCONTROL_CONTINUOUS BIT(1)
# define PV_VCONTROL_VIDEN BIT(0)
#define PV_VSYNCD 0x08
#define PV_VSYNCD_EVEN 0x08
#define PV_HORZA 0x0c
# define PV_HORZA_HBP_MASK VC4_MASK(31, 16)
@ -350,6 +350,17 @@
# define SCALER_DISPCTRLX_HEIGHT_SHIFT 0
#define SCALER_DISPBKGND0 0x00000044
# define SCALER_DISPBKGND_AUTOHS BIT(31)
# define SCALER_DISPBKGND_INTERLACE BIT(30)
# define SCALER_DISPBKGND_GAMMA BIT(29)
# define SCALER_DISPBKGND_TESTMODE_MASK VC4_MASK(28, 25)
# define SCALER_DISPBKGND_TESTMODE_SHIFT 25
/* Enables filling the scaler line with the RGB value in the low 24
* bits before compositing. Costs cycles, so should be skipped if
* opaque display planes will cover everything.
*/
# define SCALER_DISPBKGND_FILL BIT(24)
#define SCALER_DISPSTAT0 0x00000048
#define SCALER_DISPBASE0 0x0000004c
# define SCALER_DISPSTATX_MODE_MASK VC4_MASK(31, 30)
@ -362,6 +373,9 @@
# define SCALER_DISPSTATX_EMPTY BIT(28)
#define SCALER_DISPCTRL1 0x00000050
#define SCALER_DISPBKGND1 0x00000054
#define SCALER_DISPBKGNDX(x) (SCALER_DISPBKGND0 + \
(x) * (SCALER_DISPBKGND1 - \
SCALER_DISPBKGND0))
#define SCALER_DISPSTAT1 0x00000058
#define SCALER_DISPSTATX(x) (SCALER_DISPSTAT0 + \
(x) * (SCALER_DISPSTAT1 - \
@ -456,6 +470,8 @@
#define VC4_HDMI_TX_PHY_RESET_CTL 0x2c0
#define VC4_HD_M_CTL 0x00c
# define VC4_HD_M_REGISTER_FILE_STANDBY (3 << 6)
# define VC4_HD_M_RAM_STANDBY (3 << 4)
# define VC4_HD_M_SW_RST BIT(2)
# define VC4_HD_M_ENABLE BIT(0)