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Fixes for v4.18-rc2: 

- A reversion of a commit in drm/sun4i to fix a run-time fault.
 - Various fixes to the sii8620 bridge.
 - Small bugfix to correctly check stride in atmel-hlcdc.
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Merge tag 'drm-misc-fixes-2018-06-21' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Fixes for v4.18-rc2:
- A reversion of a commit in drm/sun4i to fix a run-time fault.
- Various fixes to the sii8620 bridge.
- Small bugfix to correctly check stride in atmel-hlcdc.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/787d4bef-a579-4046-d0fc-f8c2c5b80c25@linux.intel.com
zero-colors
Dave Airlie 2018-06-22 09:58:57 +10:00
parent 8325e6e36c e8b92efa62
commit f3294568bb
3 changed files with 117 additions and 217 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
View File

@ -839,7 +839,7 @@ static int atmel_hlcdc_plane_init_properties(struct atmel_hlcdc_plane *plane)
return ret;
}
if (desc->layout.xstride && desc->layout.pstride) {
if (desc->layout.xstride[0] && desc->layout.pstride[0]) {
int ret;
ret = drm_plane_create_rotation_property(&plane->base,

307
drivers/gpu/drm/bridge/sil-sii8620.c
View File

@ -36,8 +36,11 @@
#define SII8620_BURST_BUF_LEN 288
#define VAL_RX_HDMI_CTRL2_DEFVAL VAL_RX_HDMI_CTRL2_IDLE_CNT(3)
#define MHL1_MAX_LCLK 225000
#define MHL3_MAX_LCLK 600000
#define MHL1_MAX_PCLK 75000
#define MHL1_MAX_PCLK_PP_MODE 150000
#define MHL3_MAX_PCLK 200000
#define MHL3_MAX_PCLK_PP_MODE 300000
enum sii8620_mode {
CM_DISCONNECTED,
@ -80,6 +83,9 @@ struct sii8620 {
u8 devcap[MHL_DCAP_SIZE];
u8 xdevcap[MHL_XDC_SIZE];
u8 avif[HDMI_INFOFRAME_SIZE(AVI)];
bool feature_complete;
bool devcap_read;
bool sink_detected;
struct edid *edid;
unsigned int gen2_write_burst:1;
enum sii8620_mt_state mt_state;
@ -476,7 +482,7 @@ static void sii8620_update_array(u8 *dst, u8 *src, int count)
}
}
static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
static void sii8620_identify_sink(struct sii8620 *ctx)
{
static const char * const sink_str[] = {
[SINK_NONE] = "NONE",
@ -487,7 +493,7 @@ static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
char sink_name[20];
struct device *dev = ctx->dev;
if (ret < 0)
if (!ctx->sink_detected || !ctx->devcap_read)
return;
sii8620_fetch_edid(ctx);
@ -496,6 +502,7 @@ static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
sii8620_mhl_disconnected(ctx);
return;
}
sii8620_set_upstream_edid(ctx);
if (drm_detect_hdmi_monitor(ctx->edid))
ctx->sink_type = SINK_HDMI;
@ -508,53 +515,6 @@ static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
sink_str[ctx->sink_type], sink_name);
}
static void sii8620_hsic_init(struct sii8620 *ctx)
{
if (!sii8620_is_mhl3(ctx))
return;
sii8620_write(ctx, REG_FCGC,
BIT_FCGC_HSIC_HOSTMODE | BIT_FCGC_HSIC_ENABLE);
sii8620_setbits(ctx, REG_HRXCTRL3,
BIT_HRXCTRL3_HRX_STAY_RESET | BIT_HRXCTRL3_STATUS_EN, ~0);
sii8620_setbits(ctx, REG_TTXNUMB, MSK_TTXNUMB_TTX_NUMBPS, 4);
sii8620_setbits(ctx, REG_TRXCTRL, BIT_TRXCTRL_TRX_FROM_SE_COC, ~0);
sii8620_setbits(ctx, REG_HTXCTRL, BIT_HTXCTRL_HTX_DRVCONN1, 0);
sii8620_setbits(ctx, REG_KEEPER, MSK_KEEPER_MODE, VAL_KEEPER_MODE_HOST);
sii8620_write_seq_static(ctx,
REG_TDMLLCTL, 0,
REG_UTSRST, BIT_UTSRST_HRX_SRST | BIT_UTSRST_HTX_SRST |
BIT_UTSRST_KEEPER_SRST | BIT_UTSRST_FC_SRST,
REG_UTSRST, BIT_UTSRST_HRX_SRST | BIT_UTSRST_HTX_SRST,
REG_HRXINTL, 0xff,
REG_HRXINTH, 0xff,
REG_TTXINTL, 0xff,
REG_TTXINTH, 0xff,
REG_TRXINTL, 0xff,
REG_TRXINTH, 0xff,
REG_HTXINTL, 0xff,
REG_HTXINTH, 0xff,
REG_FCINTR0, 0xff,
REG_FCINTR1, 0xff,
REG_FCINTR2, 0xff,
REG_FCINTR3, 0xff,
REG_FCINTR4, 0xff,
REG_FCINTR5, 0xff,
REG_FCINTR6, 0xff,
REG_FCINTR7, 0xff
);
}
static void sii8620_edid_read(struct sii8620 *ctx, int ret)
{
if (ret < 0)
return;
sii8620_set_upstream_edid(ctx);
sii8620_hsic_init(ctx);
sii8620_enable_hpd(ctx);
}
static void sii8620_mr_devcap(struct sii8620 *ctx)
{
u8 dcap[MHL_DCAP_SIZE];
@ -570,6 +530,8 @@ static void sii8620_mr_devcap(struct sii8620 *ctx)
dcap[MHL_DCAP_ADOPTER_ID_H], dcap[MHL_DCAP_ADOPTER_ID_L],
dcap[MHL_DCAP_DEVICE_ID_H], dcap[MHL_DCAP_DEVICE_ID_L]);
sii8620_update_array(ctx->devcap, dcap, MHL_DCAP_SIZE);
ctx->devcap_read = true;
sii8620_identify_sink(ctx);
}
static void sii8620_mr_xdevcap(struct sii8620 *ctx)
@ -807,6 +769,7 @@ static void sii8620_burst_rx_all(struct sii8620 *ctx)
static void sii8620_fetch_edid(struct sii8620 *ctx)
{
u8 lm_ddc, ddc_cmd, int3, cbus;
unsigned long timeout;
int fetched, i;
int edid_len = EDID_LENGTH;
u8 *edid;
@ -856,23 +819,31 @@ static void sii8620_fetch_edid(struct sii8620 *ctx)
REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_ENH_DDC_READ_NO_ACK
);
do {
int3 = sii8620_readb(ctx, REG_INTR3);
int3 = 0;
timeout = jiffies + msecs_to_jiffies(200);
for (;;) {
cbus = sii8620_readb(ctx, REG_CBUS_STATUS);
if (int3 & BIT_DDC_CMD_DONE)
break;
if (!(cbus & BIT_CBUS_STATUS_CBUS_CONNECTED)) {
if (~cbus & BIT_CBUS_STATUS_CBUS_CONNECTED) {
kfree(edid);
edid = NULL;
goto end;
}
if (int3 & BIT_DDC_CMD_DONE) {
if (sii8620_readb(ctx, REG_DDC_DOUT_CNT)
>= FETCH_SIZE)
break;
} else {
int3 = sii8620_readb(ctx, REG_INTR3);
}
if (time_is_before_jiffies(timeout)) {
ctx->error = -ETIMEDOUT;
dev_err(ctx->dev, "timeout during EDID read\n");
kfree(edid);
edid = NULL;
goto end;
}
} while (1);
sii8620_readb(ctx, REG_DDC_STATUS);
while (sii8620_readb(ctx, REG_DDC_DOUT_CNT) < FETCH_SIZE)
usleep_range(10, 20);
}
sii8620_read_buf(ctx, REG_DDC_DATA, edid + fetched, FETCH_SIZE);
if (fetched + FETCH_SIZE == EDID_LENGTH) {
@ -971,8 +942,17 @@ static int sii8620_hw_on(struct sii8620 *ctx)
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret)
return ret;
usleep_range(10000, 20000);
return clk_prepare_enable(ctx->clk_xtal);
ret = clk_prepare_enable(ctx->clk_xtal);
if (ret)
return ret;
msleep(100);
gpiod_set_value(ctx->gpio_reset, 0);
msleep(100);
return 0;
}
static int sii8620_hw_off(struct sii8620 *ctx)
@ -982,17 +962,6 @@ static int sii8620_hw_off(struct sii8620 *ctx)
return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}
static void sii8620_hw_reset(struct sii8620 *ctx)
{
usleep_range(10000, 20000);
gpiod_set_value(ctx->gpio_reset, 0);
usleep_range(5000, 20000);
gpiod_set_value(ctx->gpio_reset, 1);
usleep_range(10000, 20000);
gpiod_set_value(ctx->gpio_reset, 0);
msleep(300);
}
static void sii8620_cbus_reset(struct sii8620 *ctx)
{
sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
@ -1048,20 +1017,11 @@ static void sii8620_stop_video(struct sii8620 *ctx)
static void sii8620_set_format(struct sii8620 *ctx)
{
u8 out_fmt;
if (sii8620_is_mhl3(ctx)) {
sii8620_setbits(ctx, REG_M3_P0CTRL,
BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED,
ctx->use_packed_pixel ? ~0 : 0);
} else {
if (ctx->use_packed_pixel)
sii8620_write_seq_static(ctx,
REG_VID_MODE, BIT_VID_MODE_M1080P,
REG_MHL_TOP_CTL, BIT_MHL_TOP_CTL_MHL_PP_SEL | 1,
REG_MHLTX_CTL6, 0x60
);
else
sii8620_write_seq_static(ctx,
REG_VID_MODE, 0,
REG_MHL_TOP_CTL, 1,
@ -1069,15 +1029,9 @@ static void sii8620_set_format(struct sii8620 *ctx)
);
}
if (ctx->use_packed_pixel)
out_fmt = VAL_TPI_FORMAT(YCBCR422, FULL) |
BIT_TPI_OUTPUT_CSCMODE709;
else
out_fmt = VAL_TPI_FORMAT(RGB, FULL);
sii8620_write_seq(ctx,
REG_TPI_INPUT, VAL_TPI_FORMAT(RGB, FULL),
REG_TPI_OUTPUT, out_fmt,
REG_TPI_OUTPUT, VAL_TPI_FORMAT(RGB, FULL),
);
}
@ -1216,7 +1170,7 @@ static void sii8620_start_video(struct sii8620 *ctx)
int clk = ctx->pixel_clock * (ctx->use_packed_pixel ? 2 : 3);
int i;
for (i = 0; i < ARRAY_SIZE(clk_spec); ++i)
for (i = 0; i < ARRAY_SIZE(clk_spec) - 1; ++i)
if (clk < clk_spec[i].max_clk)
break;
@ -1534,6 +1488,16 @@ static void sii8620_set_mode(struct sii8620 *ctx, enum sii8620_mode mode)
);
}
static void sii8620_hpd_unplugged(struct sii8620 *ctx)
{
sii8620_disable_hpd(ctx);
ctx->sink_type = SINK_NONE;
ctx->sink_detected = false;
ctx->feature_complete = false;
kfree(ctx->edid);
ctx->edid = NULL;
}
static void sii8620_disconnect(struct sii8620 *ctx)
{
sii8620_disable_gen2_write_burst(ctx);
@ -1561,7 +1525,7 @@ static void sii8620_disconnect(struct sii8620 *ctx)
REG_MHL_DP_CTL6, 0x2A,
REG_MHL_DP_CTL7, 0x03
);
sii8620_disable_hpd(ctx);
sii8620_hpd_unplugged(ctx);
sii8620_write_seq_static(ctx,
REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
REG_MHL_COC_CTL1, 0x07,
@ -1609,10 +1573,8 @@ static void sii8620_disconnect(struct sii8620 *ctx)
memset(ctx->xstat, 0, sizeof(ctx->xstat));
memset(ctx->devcap, 0, sizeof(ctx->devcap));
memset(ctx->xdevcap, 0, sizeof(ctx->xdevcap));
ctx->devcap_read = false;
ctx->cbus_status = 0;
ctx->sink_type = SINK_NONE;
kfree(ctx->edid);
ctx->edid = NULL;
sii8620_mt_cleanup(ctx);
}
@ -1703,9 +1665,6 @@ static void sii8620_status_changed_path(struct sii8620 *ctx)
sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
MHL_DST_LM_CLK_MODE_NORMAL
| MHL_DST_LM_PATH_ENABLED);
if (!sii8620_is_mhl3(ctx))
sii8620_mt_read_devcap(ctx, false);
sii8620_mt_set_cont(ctx, sii8620_sink_detected);
} else {
sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
MHL_DST_LM_CLK_MODE_NORMAL);
@ -1722,9 +1681,14 @@ static void sii8620_msc_mr_write_stat(struct sii8620 *ctx)
sii8620_update_array(ctx->stat, st, MHL_DST_SIZE);
sii8620_update_array(ctx->xstat, xst, MHL_XDS_SIZE);
if (ctx->stat[MHL_DST_CONNECTED_RDY] & MHL_DST_CONN_DCAP_RDY)
if (ctx->stat[MHL_DST_CONNECTED_RDY] & st[MHL_DST_CONNECTED_RDY] &
MHL_DST_CONN_DCAP_RDY) {
sii8620_status_dcap_ready(ctx);
if (!sii8620_is_mhl3(ctx))
sii8620_mt_read_devcap(ctx, false);
}
if (st[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
sii8620_status_changed_path(ctx);
}
@ -1808,8 +1772,11 @@ static void sii8620_msc_mr_set_int(struct sii8620 *ctx)
}
if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_REQ)
sii8620_send_features(ctx);
if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE)
sii8620_edid_read(ctx, 0);
if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE) {
ctx->feature_complete = true;
if (ctx->edid)
sii8620_enable_hpd(ctx);
}
}
static struct sii8620_mt_msg *sii8620_msc_msg_first(struct sii8620 *ctx)
@ -1884,6 +1851,15 @@ static void sii8620_irq_msc(struct sii8620 *ctx)
if (stat & BIT_CBUS_MSC_MR_WRITE_STAT)
sii8620_msc_mr_write_stat(ctx);
if (stat & BIT_CBUS_HPD_CHG) {
if (ctx->cbus_status & BIT_CBUS_STATUS_CBUS_HPD) {
ctx->sink_detected = true;
sii8620_identify_sink(ctx);
} else {
sii8620_hpd_unplugged(ctx);
}
}
if (stat & BIT_CBUS_MSC_MR_SET_INT)
sii8620_msc_mr_set_int(ctx);
@ -1931,14 +1907,6 @@ static void sii8620_irq_edid(struct sii8620 *ctx)
ctx->mt_state = MT_STATE_DONE;
}
static void sii8620_scdt_high(struct sii8620 *ctx)
{
sii8620_write_seq_static(ctx,
REG_INTR8_MASK, BIT_CEA_NEW_AVI | BIT_CEA_NEW_VSI,
REG_TPI_SC, BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI,
);
}
static void sii8620_irq_scdt(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_INTR5);
@ -1946,53 +1914,13 @@ static void sii8620_irq_scdt(struct sii8620 *ctx)
if (stat & BIT_INTR_SCDT_CHANGE) {
u8 cstat = sii8620_readb(ctx, REG_TMDS_CSTAT_P3);
if (cstat & BIT_TMDS_CSTAT_P3_SCDT) {
if (ctx->sink_type == SINK_HDMI)
/* enable infoframe interrupt */
sii8620_scdt_high(ctx);
else
sii8620_start_video(ctx);
}
if (cstat & BIT_TMDS_CSTAT_P3_SCDT)
sii8620_start_video(ctx);
}
sii8620_write(ctx, REG_INTR5, stat);
}
static void sii8620_new_vsi(struct sii8620 *ctx)
{
u8 vsif[11];
sii8620_write(ctx, REG_RX_HDMI_CTRL2,
VAL_RX_HDMI_CTRL2_DEFVAL |
BIT_RX_HDMI_CTRL2_VSI_MON_SEL_VSI);
sii8620_read_buf(ctx, REG_RX_HDMI_MON_PKT_HEADER1, vsif,
ARRAY_SIZE(vsif));
}
static void sii8620_new_avi(struct sii8620 *ctx)
{
sii8620_write(ctx, REG_RX_HDMI_CTRL2, VAL_RX_HDMI_CTRL2_DEFVAL);
sii8620_read_buf(ctx, REG_RX_HDMI_MON_PKT_HEADER1, ctx->avif,
ARRAY_SIZE(ctx->avif));
}
static void sii8620_irq_infr(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_INTR8)
& (BIT_CEA_NEW_VSI | BIT_CEA_NEW_AVI);
sii8620_write(ctx, REG_INTR8, stat);
if (stat & BIT_CEA_NEW_VSI)
sii8620_new_vsi(ctx);
if (stat & BIT_CEA_NEW_AVI)
sii8620_new_avi(ctx);
if (stat & (BIT_CEA_NEW_VSI | BIT_CEA_NEW_AVI))
sii8620_start_video(ctx);
}
static void sii8620_got_xdevcap(struct sii8620 *ctx, int ret)
{
if (ret < 0)
@ -2043,11 +1971,11 @@ static void sii8620_irq_ddc(struct sii8620 *ctx)
if (stat & BIT_DDC_CMD_DONE) {
sii8620_write(ctx, REG_INTR3_MASK, 0);
if (sii8620_is_mhl3(ctx))
if (sii8620_is_mhl3(ctx) && !ctx->feature_complete)
sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
MHL_INT_RC_FEAT_REQ);
else
sii8620_edid_read(ctx, 0);
sii8620_enable_hpd(ctx);
}
sii8620_write(ctx, REG_INTR3, stat);
}
@ -2074,7 +2002,6 @@ static irqreturn_t sii8620_irq_thread(int irq, void *data)
{ BIT_FAST_INTR_STAT_EDID, sii8620_irq_edid },
{ BIT_FAST_INTR_STAT_DDC, sii8620_irq_ddc },
{ BIT_FAST_INTR_STAT_SCDT, sii8620_irq_scdt },
{ BIT_FAST_INTR_STAT_INFR, sii8620_irq_infr },
};
struct sii8620 *ctx = data;
u8 stats[LEN_FAST_INTR_STAT];
@ -2112,7 +2039,6 @@ static void sii8620_cable_in(struct sii8620 *ctx)
dev_err(dev, "Error powering on, %d.\n", ret);
return;
}
sii8620_hw_reset(ctx);
sii8620_read_buf(ctx, REG_VND_IDL, ver, ARRAY_SIZE(ver));
ret = sii8620_clear_error(ctx);
@ -2268,17 +2194,43 @@ static void sii8620_detach(struct drm_bridge *bridge)
rc_unregister_device(ctx->rc_dev);
}
static int sii8620_is_packing_required(struct sii8620 *ctx,
const struct drm_display_mode *mode)
{
int max_pclk, max_pclk_pp_mode;
if (sii8620_is_mhl3(ctx)) {
max_pclk = MHL3_MAX_PCLK;
max_pclk_pp_mode = MHL3_MAX_PCLK_PP_MODE;
} else {
max_pclk = MHL1_MAX_PCLK;
max_pclk_pp_mode = MHL1_MAX_PCLK_PP_MODE;
}
if (mode->clock < max_pclk)
return 0;
else if (mode->clock < max_pclk_pp_mode)
return 1;
else
return -1;
}
static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge,
const struct drm_display_mode *mode)
{
struct sii8620 *ctx = bridge_to_sii8620(bridge);
int pack_required = sii8620_is_packing_required(ctx, mode);
bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] &
MHL_DCAP_VID_LINK_PPIXEL;
unsigned int max_pclk = sii8620_is_mhl3(ctx) ? MHL3_MAX_LCLK :
MHL1_MAX_LCLK;
max_pclk /= can_pack ? 2 : 3;
return (mode->clock > max_pclk) ? MODE_CLOCK_HIGH : MODE_OK;
switch (pack_required) {
case 0:
return MODE_OK;
case 1:
return (can_pack) ? MODE_OK : MODE_CLOCK_HIGH;
default:
return MODE_CLOCK_HIGH;
}
}
static bool sii8620_mode_fixup(struct drm_bridge *bridge,
@ -2286,43 +2238,16 @@ static bool sii8620_mode_fixup(struct drm_bridge *bridge,
struct drm_display_mode *adjusted_mode)
{
struct sii8620 *ctx = bridge_to_sii8620(bridge);
int max_lclk;
bool ret = true;
mutex_lock(&ctx->lock);
max_lclk = sii8620_is_mhl3(ctx) ? MHL3_MAX_LCLK : MHL1_MAX_LCLK;
if (max_lclk > 3 * adjusted_mode->clock) {
ctx->use_packed_pixel = 0;
goto end;
}
if ((ctx->devcap[MHL_DCAP_VID_LINK_MODE] & MHL_DCAP_VID_LINK_PPIXEL) &&
max_lclk > 2 * adjusted_mode->clock) {
ctx->use_packed_pixel = 1;
goto end;
}
ret = false;
end:
if (ret) {
u8 vic = drm_match_cea_mode(adjusted_mode);
ctx->use_packed_pixel = sii8620_is_packing_required(ctx, adjusted_mode);
ctx->video_code = drm_match_cea_mode(adjusted_mode);
ctx->pixel_clock = adjusted_mode->clock;
if (!vic) {
union hdmi_infoframe frm;
u8 mhl_vic[] = { 0, 95, 94, 93, 98 };
/* FIXME: We need the connector here */
drm_hdmi_vendor_infoframe_from_display_mode(
&frm.vendor.hdmi, NULL, adjusted_mode);
vic = frm.vendor.hdmi.vic;
if (vic >= ARRAY_SIZE(mhl_vic))
vic = 0;
vic = mhl_vic[vic];
}
ctx->video_code = vic;
ctx->pixel_clock = adjusted_mode->clock;
}
mutex_unlock(&ctx->lock);
return ret;
return true;
}
static const struct drm_bridge_funcs sii8620_bridge_funcs = {

25
drivers/gpu/drm/sun4i/sun4i_tcon.c
View File

@ -17,7 +17,6 @@
#include <drm/drm_encoder.h>
#include <drm/drm_modes.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <uapi/drm/drm_mode.h>
@ -418,9 +417,6 @@ static void sun4i_tcon0_mode_set_lvds(struct sun4i_tcon *tcon,
static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
const struct drm_display_mode *mode)
{
struct drm_panel *panel = tcon->panel;
struct drm_connector *connector = panel->connector;
struct drm_display_info display_info = connector->display_info;
unsigned int bp, hsync, vsync;
u8 clk_delay;
u32 val = 0;
@ -478,27 +474,6 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
if (mode->flags & DRM_MODE_FLAG_PVSYNC)
val |= SUN4I_TCON0_IO_POL_VSYNC_POSITIVE;
/*
* On A20 and similar SoCs, the only way to achieve Positive Edge
* (Rising Edge), is setting dclk clock phase to 2/3(240°).
* By default TCON works in Negative Edge(Falling Edge),
* this is why phase is set to 0 in that case.
* Unfortunately there's no way to logically invert dclk through
* IO_POL register.
* The only acceptable way to work, triple checked with scope,
* is using clock phase set to 0° for Negative Edge and set to 240°
* for Positive Edge.
* On A33 and similar SoCs there would be a 90° phase option,
* but it divides also dclk by 2.
* Following code is a way to avoid quirks all around TCON
* and DOTCLOCK drivers.
*/
if (display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE)
clk_set_phase(tcon->dclk, 240);
if (display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE)
clk_set_phase(tcon->dclk, 0);
regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
SUN4I_TCON0_IO_POL_HSYNC_POSITIVE | SUN4I_TCON0_IO_POL_VSYNC_POSITIVE,
val);