Now that we have everything we need in the phy framework to allow to tune
the phy parameters, let's convert the Cadence DSI bridge to that API
instead of creating a ad-hoc driver for its phy.
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
---
drivers/gpu/drm/bridge/cdns-dsi.c | 485 +++----------------------------
1 file changed, 59 insertions(+), 426 deletions(-)
diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c
index 3ac6dd524b6d..dcec209dbd52 100644
--- a/drivers/gpu/drm/bridge/cdns-dsi.c
+++ b/drivers/gpu/drm/bridge/cdns-dsi.c
@@ -21,6 +21,9 @@
#include <linux/pm_runtime.h>
#include <linux/reset.h>
+#include <linux/phy/phy.h>
+#include <linux/phy/phy-mipi-dphy.h>
+
#define IP_CONF 0x0
#define SP_HS_FIFO_DEPTH(x) (((x) & GENMASK(30, 26)) >> 26)
#define SP_LP_FIFO_DEPTH(x) (((x) & GENMASK(25, 21)) >> 21)
@@ -419,44 +422,11 @@
#define DSI_NULL_FRAME_OVERHEAD 6
#define DSI_EOT_PKT_SIZE 4
-#define REG_WAKEUP_TIME_NS 800
-#define DPHY_PLL_RATE_HZ 108000000
-
-/* DPHY registers */
-#define DPHY_PMA_CMN(reg) (reg)
-#define DPHY_PMA_LCLK(reg) (0x100 + (reg))
-#define DPHY_PMA_LDATA(lane, reg) (0x200 + ((lane) * 0x100) + (reg))
-#define DPHY_PMA_RCLK(reg) (0x600 + (reg))
-#define DPHY_PMA_RDATA(lane, reg) (0x700 + ((lane) * 0x100) + (reg))
-#define DPHY_PCS(reg) (0xb00 + (reg))
-
-#define DPHY_CMN_SSM DPHY_PMA_CMN(0x20)
-#define DPHY_CMN_SSM_EN BIT(0)
-#define DPHY_CMN_TX_MODE_EN BIT(9)
-
-#define DPHY_CMN_PWM DPHY_PMA_CMN(0x40)
-#define DPHY_CMN_PWM_DIV(x) ((x) << 20)
-#define DPHY_CMN_PWM_LOW(x) ((x) << 10)
-#define DPHY_CMN_PWM_HIGH(x) (x)
-
-#define DPHY_CMN_FBDIV DPHY_PMA_CMN(0x4c)
-#define DPHY_CMN_FBDIV_VAL(low, high) (((high) << 11) | ((low) << 22))
-#define DPHY_CMN_FBDIV_FROM_REG (BIT(10) | BIT(21))
-
-#define DPHY_CMN_OPIPDIV DPHY_PMA_CMN(0x50)
-#define DPHY_CMN_IPDIV_FROM_REG BIT(0)
-#define DPHY_CMN_IPDIV(x) ((x) << 1)
-#define DPHY_CMN_OPDIV_FROM_REG BIT(6)
-#define DPHY_CMN_OPDIV(x) ((x) << 7)
-
-#define DPHY_PSM_CFG DPHY_PCS(0x4)
-#define DPHY_PSM_CFG_FROM_REG BIT(0)
-#define DPHY_PSM_CLK_DIV(x) ((x) << 1)
-
struct cdns_dsi_output {
struct mipi_dsi_device *dev;
struct drm_panel *panel;
struct drm_bridge *bridge;
+ union phy_configure_opts phy_opts;
};
enum cdns_dsi_input_id {
@@ -465,14 +435,6 @@ enum cdns_dsi_input_id {
CDNS_DSC_INPUT,
};
-struct cdns_dphy_cfg {
- u8 pll_ipdiv;
- u8 pll_opdiv;
- u16 pll_fbdiv;
- unsigned long lane_bps;
- unsigned int nlanes;
-};
-
struct cdns_dsi_cfg {
unsigned int hfp;
unsigned int hsa;
@@ -481,34 +443,6 @@ struct cdns_dsi_cfg {
unsigned int htotal;
};
-struct cdns_dphy;
-
-enum cdns_dphy_clk_lane_cfg {
- DPHY_CLK_CFG_LEFT_DRIVES_ALL = 0,
- DPHY_CLK_CFG_LEFT_DRIVES_RIGHT = 1,
- DPHY_CLK_CFG_LEFT_DRIVES_LEFT = 2,
- DPHY_CLK_CFG_RIGHT_DRIVES_ALL = 3,
-};
-
-struct cdns_dphy_ops {
- int (*probe)(struct cdns_dphy *dphy);
- void (*remove)(struct cdns_dphy *dphy);
- void (*set_psm_div)(struct cdns_dphy *dphy, u8 div);
- void (*set_clk_lane_cfg)(struct cdns_dphy *dphy,
- enum cdns_dphy_clk_lane_cfg cfg);
- void (*set_pll_cfg)(struct cdns_dphy *dphy,
- const struct cdns_dphy_cfg *cfg);
- unsigned long (*get_wakeup_time_ns)(struct cdns_dphy *dphy);
-};
-
-struct cdns_dphy {
- struct cdns_dphy_cfg cfg;
- void __iomem *regs;
- struct clk *psm_clk;
- struct clk *pll_ref_clk;
- const struct cdns_dphy_ops *ops;
-};
-
struct cdns_dsi_input {
enum cdns_dsi_input_id id;
struct drm_bridge bridge;
@@ -526,7 +460,7 @@ struct cdns_dsi {
struct reset_control *dsi_p_rst;
struct clk *dsi_sys_clk;
bool link_initialized;
- struct cdns_dphy *dphy;
+ struct phy *dphy;
};
static inline struct cdns_dsi *input_to_dsi(struct cdns_dsi_input *input)
@@ -550,175 +484,6 @@ static unsigned int mode_to_dpi_hfp(const struct drm_display_mode *mode)
return mode->crtc_hsync_start - mode->crtc_hdisplay;
}
-static int cdns_dsi_get_dphy_pll_cfg(struct cdns_dphy *dphy,
- struct cdns_dphy_cfg *cfg,
- unsigned int dpi_htotal,
- unsigned int dpi_bpp,
- unsigned int dpi_hz,
- unsigned int dsi_htotal,
- unsigned int dsi_nlanes,
- unsigned int *dsi_hfp_ext)
-{
- u64 dlane_bps, dlane_bps_max, fbdiv, fbdiv_max, adj_dsi_htotal;
- unsigned long pll_ref_hz = clk_get_rate(dphy->pll_ref_clk);
-
- memset(cfg, 0, sizeof(*cfg));
-
- cfg->nlanes = dsi_nlanes;
-
- if (pll_ref_hz < 9600000 || pll_ref_hz >= 150000000)
- return -EINVAL;
- else if (pll_ref_hz < 19200000)
- cfg->pll_ipdiv = 1;
- else if (pll_ref_hz < 38400000)
- cfg->pll_ipdiv = 2;
- else if (pll_ref_hz < 76800000)
- cfg->pll_ipdiv = 4;
- else
- cfg->pll_ipdiv = 8;
-
- /*
- * Make sure DSI htotal is aligned on a lane boundary when calculating
- * the expected data rate. This is done by extending HFP in case of
- * misalignment.
- */
- adj_dsi_htotal = dsi_htotal;
- if (dsi_htotal % dsi_nlanes)
- adj_dsi_htotal += dsi_nlanes - (dsi_htotal % dsi_nlanes);
-
- dlane_bps = (u64)dpi_hz * adj_dsi_htotal;
-
- /* data rate in bytes/sec is not an integer, refuse the mode. */
- if (do_div(dlane_bps, dsi_nlanes * dpi_htotal))
- return -EINVAL;
-
- /* data rate was in bytes/sec, convert to bits/sec. */
- dlane_bps *= 8;
-
- if (dlane_bps > 2500000000UL || dlane_bps < 160000000UL)
- return -EINVAL;
- else if (dlane_bps >= 1250000000)
- cfg->pll_opdiv = 1;
- else if (dlane_bps >= 630000000)
- cfg->pll_opdiv = 2;
- else if (dlane_bps >= 320000000)
- cfg->pll_opdiv = 4;
- else if (dlane_bps >= 160000000)
- cfg->pll_opdiv = 8;
-
- /*
- * Allow a deviation of 0.2% on the per-lane data rate to try to
- * recover a potential mismatch between DPI and PPI clks.
- */
- dlane_bps_max = dlane_bps + DIV_ROUND_DOWN_ULL(dlane_bps, 500);
- fbdiv_max = DIV_ROUND_DOWN_ULL(dlane_bps_max * 2 *
- cfg->pll_opdiv * cfg->pll_ipdiv,
- pll_ref_hz);
- fbdiv = DIV_ROUND_UP_ULL(dlane_bps * 2 * cfg->pll_opdiv *
- cfg->pll_ipdiv,
- pll_ref_hz);
-
- /*
- * Iterate over all acceptable fbdiv and try to find an adjusted DSI
- * htotal length providing an exact match.
- *
- * Note that we could do something even trickier by relying on the fact
- * that a new line is not necessarily aligned on a lane boundary, so,
- * by making adj_dsi_htotal non aligned on a dsi_lanes we can improve a
- * bit the precision. With this, the step would be
- *
- * pll_ref_hz / (2 * opdiv * ipdiv * nlanes)
- *
- * instead of
- *
- * pll_ref_hz / (2 * opdiv * ipdiv)
- *
- * The drawback of this approach is that we would need to make sure the
- * number or lines is a multiple of the realignment periodicity which is
- * a function of the number of lanes and the original misalignment. For
- * example, for NLANES = 4 and HTOTAL % NLANES = 3, it takes 4 lines
- * to realign on a lane:
- * LINE 0: expected number of bytes, starts emitting first byte of
- * LINE 1 on LANE 3
- * LINE 1: expected number of bytes, starts emitting first 2 bytes of
- * LINE 2 on LANES 2 and 3
- * LINE 2: expected number of bytes, starts emitting first 3 bytes of
- * of LINE 3 on LANES 1, 2 and 3
- * LINE 3: one byte less, now things are realigned on LANE 0 for LINE 4
- *
- * I figured this extra complexity was not worth the benefit, but if
- * someone really has unfixable mismatch, that would be something to
- * investigate.
- */
- for (; fbdiv <= fbdiv_max; fbdiv++) {
- u32 rem;
-
- adj_dsi_htotal = (u64)fbdiv * pll_ref_hz * dsi_nlanes *
- dpi_htotal;
-
- /*
- * Do the division in 2 steps to avoid an overflow on the
- * divider.
- */
- rem = do_div(adj_dsi_htotal, dpi_hz);
- if (rem)
- continue;
-
- rem = do_div(adj_dsi_htotal,
- cfg->pll_opdiv * cfg->pll_ipdiv * 2 * 8);
- if (rem)
- continue;
-
- cfg->pll_fbdiv = fbdiv;
- *dsi_hfp_ext = adj_dsi_htotal - dsi_htotal;
- break;
- }
-
- /* No match, let's just reject the display mode. */
- if (!cfg->pll_fbdiv)
- return -EINVAL;
-
- dlane_bps = DIV_ROUND_DOWN_ULL((u64)dpi_hz * adj_dsi_htotal * 8,
- dsi_nlanes * dpi_htotal);
- cfg->lane_bps = dlane_bps;
-
- return 0;
-}
-
-static int cdns_dphy_setup_psm(struct cdns_dphy *dphy)
-{
- unsigned long psm_clk_hz = clk_get_rate(dphy->psm_clk);
- unsigned long psm_div;
-
- if (!psm_clk_hz || psm_clk_hz > 100000000)
- return -EINVAL;
-
- psm_div = DIV_ROUND_CLOSEST(psm_clk_hz, 1000000);
- if (dphy->ops->set_psm_div)
- dphy->ops->set_psm_div(dphy, psm_div);
-
- return 0;
-}
-
-static void cdns_dphy_set_clk_lane_cfg(struct cdns_dphy *dphy,
- enum cdns_dphy_clk_lane_cfg cfg)
-{
- if (dphy->ops->set_clk_lane_cfg)
- dphy->ops->set_clk_lane_cfg(dphy, cfg);
-}
-
-static void cdns_dphy_set_pll_cfg(struct cdns_dphy *dphy,
- const struct cdns_dphy_cfg *cfg)
-{
- if (dphy->ops->set_pll_cfg)
- dphy->ops->set_pll_cfg(dphy, cfg);
-}
-
-static unsigned long cdns_dphy_get_wakeup_time_ns(struct cdns_dphy *dphy)
-{
- return dphy->ops->get_wakeup_time_ns(dphy);
-}
-
static unsigned int dpi_to_dsi_timing(unsigned int dpi_timing,
unsigned int dpi_bpp,
unsigned int dsi_pkt_overhead)
@@ -780,17 +545,20 @@ static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
return 0;
}
-static int cdns_dphy_validate(struct cdns_dsi *dsi,
+static int cdns_dsi_adjust_phy_config(struct cdns_dsi *dsi,
struct cdns_dsi_cfg *dsi_cfg,
- struct cdns_dphy_cfg *dphy_cfg,
+ struct phy_configure_opts_mipi_dphy *phy_cfg,
const struct drm_display_mode *mode,
bool mode_valid_check)
{
struct cdns_dsi_output *output = &dsi->output;
+ unsigned long long dlane_bps;
+ unsigned long adj_dsi_htotal;
unsigned long dsi_htotal;
- unsigned int dsi_hfp_ext = 0;
-
- int ret;
+ unsigned long dpi_htotal;
+ unsigned long dpi_hz;
+ unsigned int dsi_hfp_ext;
+ unsigned int lanes = output->dev->lanes;
dsi_htotal = dsi_cfg->hbp + DSI_HBP_FRAME_OVERHEAD;
if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
@@ -799,25 +567,27 @@ static int cdns_dphy_validate(struct cdns_dsi *dsi,
dsi_htotal += dsi_cfg->hact;
dsi_htotal += dsi_cfg->hfp + DSI_HFP_FRAME_OVERHEAD;
- if (mode_valid_check)
- ret = cdns_dsi_get_dphy_pll_cfg(dsi->dphy, dphy_cfg,
- mode->htotal,
- mode->clock * 1000,
- mipi_dsi_pixel_format_to_bpp(output->dev->format),
- dsi_htotal,
- output->dev->lanes,
- &dsi_hfp_ext);
- else
- ret = cdns_dsi_get_dphy_pll_cfg(dsi->dphy, dphy_cfg,
- mode->crtc_htotal,
- mipi_dsi_pixel_format_to_bpp(output->dev->format),
- mode->crtc_clock * 1000,
- dsi_htotal,
- output->dev->lanes,
- &dsi_hfp_ext);
- if (ret)
- return ret;
+ /*
+ * Make sure DSI htotal is aligned on a lane boundary when calculating
+ * the expected data rate. This is done by extending HFP in case of
+ * misalignment.
+ */
+ adj_dsi_htotal = dsi_htotal;
+ if (dsi_htotal % lanes)
+ adj_dsi_htotal += lanes - (dsi_htotal % lanes);
+
+ dpi_hz = (mode_valid_check ? mode->clock : mode->crtc_clock) * 1000;
+ dlane_bps = (unsigned long long)dpi_hz * adj_dsi_htotal;
+
+ /* data rate in bytes/sec is not an integer, refuse the mode. */
+ dpi_htotal = mode_valid_check ? mode->htotal : mode->crtc_htotal;
+ if (do_div(dlane_bps, lanes * dpi_htotal))
+ return -EINVAL;
+ /* data rate was in bytes/sec, convert to bits/sec. */
+ phy_cfg->hs_clk_rate = dlane_bps * 8;
+
+ dsi_hfp_ext = adj_dsi_htotal - dsi_htotal;
dsi_cfg->hfp += dsi_hfp_ext;
dsi_cfg->htotal = dsi_htotal + dsi_hfp_ext;
@@ -827,10 +597,10 @@ static int cdns_dphy_validate(struct cdns_dsi *dsi,
static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
const struct drm_display_mode *mode,
struct cdns_dsi_cfg *dsi_cfg,
- struct cdns_dphy_cfg *dphy_cfg,
bool mode_valid_check)
{
struct cdns_dsi_output *output = &dsi->output;
+ struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy;
unsigned long dsi_hss_hsa_hse_hbp;
unsigned int nlanes = output->dev->lanes;
int ret;
@@ -839,7 +609,15 @@ static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
if (ret)
return ret;
- ret = cdns_dphy_validate(dsi, dsi_cfg, dphy_cfg, mode, mode_valid_check);
+ phy_mipi_dphy_get_default_config(mode->crtc_clock * 1000,
+ mipi_dsi_pixel_format_to_bpp(output->dev->format),
+ nlanes, phy_cfg);
+
+ ret = cdns_dsi_adjust_phy_config(dsi, dsi_cfg, phy_cfg, mode, mode_valid_check);
+ if (ret)
+ return ret;
+
+ ret = phy_validate(dsi->dphy, PHY_MODE_MIPI_DPHY, &output->phy_opts);
if (ret)
return ret;
@@ -852,7 +630,7 @@ static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
* is empty before we start a receiving a new line on the DPI
* interface.
*/
- if ((u64)dphy_cfg->lane_bps * mode_to_dpi_hfp(mode) * nlanes <
+ if ((u64)phy_cfg->hs_clk_rate * mode_to_dpi_hfp(mode) * nlanes <
(u64)dsi_hss_hsa_hse_hbp *
(mode_valid_check ? mode->clock : mode->crtc_clock) * 1000)
return -EINVAL;
@@ -882,7 +660,6 @@ cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
struct cdns_dsi *dsi = input_to_dsi(input);
struct cdns_dsi_output *output = &dsi->output;
- struct cdns_dphy_cfg dphy_cfg;
struct cdns_dsi_cfg dsi_cfg;
int bpp, ret;
@@ -902,7 +679,7 @@ cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
if ((mode->hdisplay * bpp) % 32)
return MODE_H_ILLEGAL;
- ret = cdns_dsi_check_conf(dsi, mode, &dsi_cfg, &dphy_cfg, true);
+ ret = cdns_dsi_check_conf(dsi, mode, &dsi_cfg, true);
if (ret)
return MODE_BAD;
@@ -925,9 +702,9 @@ static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
pm_runtime_put(dsi->base.dev);
}
-static void cdns_dsi_hs_init(struct cdns_dsi *dsi,
- const struct cdns_dphy_cfg *dphy_cfg)
+static void cdns_dsi_hs_init(struct cdns_dsi *dsi)
{
+ struct cdns_dsi_output *output = &dsi->output;
u32 status;
/*
@@ -938,30 +715,10 @@ static void cdns_dsi_hs_init(struct cdns_dsi *dsi,
DPHY_CMN_PDN | DPHY_PLL_PDN,
dsi->regs + MCTL_DPHY_CFG0);
- /*
- * Configure the internal PSM clk divider so that the DPHY has a
- * 1MHz clk (or something close).
- */
- WARN_ON_ONCE(cdns_dphy_setup_psm(dsi->dphy));
-
- /*
- * Configure attach clk lanes to data lanes: the DPHY has 2 clk lanes
- * and 8 data lanes, each clk lane can be attache different set of
- * data lanes. The 2 groups are named 'left' and 'right', so here we
- * just say that we want the 'left' clk lane to drive the 'left' data
- * lanes.
- */
- cdns_dphy_set_clk_lane_cfg(dsi->dphy, DPHY_CLK_CFG_LEFT_DRIVES_LEFT);
-
- /*
- * Configure the DPHY PLL that will be used to generate the TX byte
- * clk.
- */
- cdns_dphy_set_pll_cfg(dsi->dphy, dphy_cfg);
-
- /* Start TX state machine. */
- writel(DPHY_CMN_SSM_EN | DPHY_CMN_TX_MODE_EN,
- dsi->dphy->regs + DPHY_CMN_SSM);
+ phy_init(dsi->dphy);
+ phy_set_mode(dsi->dphy, PHY_MODE_MIPI_DPHY);
+ phy_configure(dsi->dphy, &output->phy_opts);
+ phy_power_on(dsi->dphy);
/* Activate the PLL and wait until it's locked. */
writel(PLL_LOCKED, dsi->regs + MCTL_MAIN_STS_CLR);
@@ -971,7 +728,7 @@ static void cdns_dsi_hs_init(struct cdns_dsi *dsi,
status & PLL_LOCKED, 100, 100));
/* De-assert data and clock reset lines. */
writel(DPHY_CMN_PSO | DPHY_ALL_D_PDN | DPHY_C_PDN | DPHY_CMN_PDN |
- DPHY_D_RSTB(dphy_cfg->nlanes) | DPHY_C_RSTB,
+ DPHY_D_RSTB(output->dev->lanes) | DPHY_C_RSTB,
dsi->regs + MCTL_DPHY_CFG0);
}
@@ -1017,7 +774,7 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
struct cdns_dsi *dsi = input_to_dsi(input);
struct cdns_dsi_output *output = &dsi->output;
struct drm_display_mode *mode;
- struct cdns_dphy_cfg dphy_cfg;
+ struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy;
unsigned long tx_byte_period;
struct cdns_dsi_cfg dsi_cfg;
u32 tmp, reg_wakeup, div;
@@ -1030,9 +787,9 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
nlanes = output->dev->lanes;
- WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, &dphy_cfg, false));
+ WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, false));
- cdns_dsi_hs_init(dsi, &dphy_cfg);
+ cdns_dsi_hs_init(dsi);
cdns_dsi_init_link(dsi);
writel(HBP_LEN(dsi_cfg.hbp) | HSA_LEN(dsi_cfg.hsa),
@@ -1068,9 +825,8 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
tmp -= DIV_ROUND_UP(DSI_EOT_PKT_SIZE, nlanes);
tx_byte_period = DIV_ROUND_DOWN_ULL((u64)NSEC_PER_SEC * 8,
- dphy_cfg.lane_bps);
- reg_wakeup = cdns_dphy_get_wakeup_time_ns(dsi->dphy) /
- tx_byte_period;
+ phy_cfg->hs_clk_rate);
+ reg_wakeup = (phy_cfg->hs_prepare + phy_cfg->hs_zero) / tx_byte_period;
writel(REG_WAKEUP_TIME(reg_wakeup) | REG_LINE_DURATION(tmp),
dsi->regs + VID_DPHY_TIME);
@@ -1384,8 +1140,6 @@ static int __maybe_unused cdns_dsi_resume(struct device *dev)
reset_control_deassert(dsi->dsi_p_rst);
clk_prepare_enable(dsi->dsi_p_clk);
clk_prepare_enable(dsi->dsi_sys_clk);
- clk_prepare_enable(dsi->dphy->psm_clk);
- clk_prepare_enable(dsi->dphy->pll_ref_clk);
return 0;
}
@@ -1394,8 +1148,6 @@ static int __maybe_unused cdns_dsi_suspend(struct device *dev)
{
struct cdns_dsi *dsi = dev_get_drvdata(dev);
- clk_disable_unprepare(dsi->dphy->pll_ref_clk);
- clk_disable_unprepare(dsi->dphy->psm_clk);
clk_disable_unprepare(dsi->dsi_sys_clk);
clk_disable_unprepare(dsi->dsi_p_clk);
reset_control_assert(dsi->dsi_p_rst);
@@ -1406,121 +1158,6 @@ static int __maybe_unused cdns_dsi_suspend(struct device *dev)
static UNIVERSAL_DEV_PM_OPS(cdns_dsi_pm_ops, cdns_dsi_suspend, cdns_dsi_resume,
NULL);
-static unsigned long cdns_dphy_ref_get_wakeup_time_ns(struct cdns_dphy *dphy)
-{
- /* Default wakeup time is 800 ns (in a simulated environment). */
- return 800;
-}
-
-static void cdns_dphy_ref_set_pll_cfg(struct cdns_dphy *dphy,
- const struct cdns_dphy_cfg *cfg)
-{
- u32 fbdiv_low, fbdiv_high;
-
- fbdiv_low = (cfg->pll_fbdiv / 4) - 2;
- fbdiv_high = cfg->pll_fbdiv - fbdiv_low - 2;
-
- writel(DPHY_CMN_IPDIV_FROM_REG | DPHY_CMN_OPDIV_FROM_REG |
- DPHY_CMN_IPDIV(cfg->pll_ipdiv) |
- DPHY_CMN_OPDIV(cfg->pll_opdiv),
- dphy->regs + DPHY_CMN_OPIPDIV);
- writel(DPHY_CMN_FBDIV_FROM_REG |
- DPHY_CMN_FBDIV_VAL(fbdiv_low, fbdiv_high),
- dphy->regs + DPHY_CMN_FBDIV);
- writel(DPHY_CMN_PWM_HIGH(6) | DPHY_CMN_PWM_LOW(0x101) |
- DPHY_CMN_PWM_DIV(0x8),
- dphy->regs + DPHY_CMN_PWM);
-}
-
-static void cdns_dphy_ref_set_psm_div(struct cdns_dphy *dphy, u8 div)
-{
- writel(DPHY_PSM_CFG_FROM_REG | DPHY_PSM_CLK_DIV(div),
- dphy->regs + DPHY_PSM_CFG);
-}
-
-/*
- * This is the reference implementation of DPHY hooks. Specific integration of
- * this IP may have to re-implement some of them depending on how they decided
- * to wire things in the SoC.
- */
-static const struct cdns_dphy_ops ref_dphy_ops = {
- .get_wakeup_time_ns = cdns_dphy_ref_get_wakeup_time_ns,
- .set_pll_cfg = cdns_dphy_ref_set_pll_cfg,
- .set_psm_div = cdns_dphy_ref_set_psm_div,
-};
-
-static const struct of_device_id cdns_dphy_of_match[] = {
- { .compatible = "cdns,dphy", .data = &ref_dphy_ops },
- { /* sentinel */ },
-};
-
-static struct cdns_dphy *cdns_dphy_probe(struct platform_device *pdev)
-{
- const struct of_device_id *match;
- struct cdns_dphy *dphy;
- struct of_phandle_args args;
- struct resource res;
- int ret;
-
- ret = of_parse_phandle_with_args(pdev->dev.of_node, "phys",
- "#phy-cells", 0, &args);
- if (ret)
- return ERR_PTR(-ENOENT);
-
- match = of_match_node(cdns_dphy_of_match, args.np);
- if (!match || !match->data)
- return ERR_PTR(-EINVAL);
-
- dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
- if (!dphy)
- return ERR_PTR(-ENOMEM);
-
- dphy->ops = match->data;
-
- ret = of_address_to_resource(args.np, 0, &res);
- if (ret)
- return ERR_PTR(ret);
-
- dphy->regs = devm_ioremap_resource(&pdev->dev, &res);
- if (IS_ERR(dphy->regs))
- return ERR_CAST(dphy->regs);
-
- dphy->psm_clk = of_clk_get_by_name(args.np, "psm");
- if (IS_ERR(dphy->psm_clk))
- return ERR_CAST(dphy->psm_clk);
-
- dphy->pll_ref_clk = of_clk_get_by_name(args.np, "pll_ref");
- if (IS_ERR(dphy->pll_ref_clk)) {
- ret = PTR_ERR(dphy->pll_ref_clk);
- goto err_put_psm_clk;
- }
-
- if (dphy->ops->probe) {
- ret = dphy->ops->probe(dphy);
- if (ret)
- goto err_put_pll_ref_clk;
- }
-
- return dphy;
-
-err_put_pll_ref_clk:
- clk_put(dphy->pll_ref_clk);
-
-err_put_psm_clk:
- clk_put(dphy->psm_clk);
-
- return ERR_PTR(ret);
-}
-
-static void cdns_dphy_remove(struct cdns_dphy *dphy)
-{
- if (dphy->ops->remove)
- dphy->ops->remove(dphy);
-
- clk_put(dphy->pll_ref_clk);
- clk_put(dphy->psm_clk);
-}
-
static int cdns_dsi_drm_probe(struct platform_device *pdev)
{
struct cdns_dsi *dsi;
@@ -1559,13 +1196,13 @@ static int cdns_dsi_drm_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
- dsi->dphy = cdns_dphy_probe(pdev);
+ dsi->dphy = devm_phy_get(&pdev->dev, "dphy");
if (IS_ERR(dsi->dphy))
return PTR_ERR(dsi->dphy);
ret = clk_prepare_enable(dsi->dsi_p_clk);
if (ret)
- goto err_remove_dphy;
+ return ret;
val = readl(dsi->regs + ID_REG);
if (REV_VENDOR_ID(val) != 0xcad) {
@@ -1623,9 +1260,6 @@ static int cdns_dsi_drm_probe(struct platform_device *pdev)
err_disable_pclk:
clk_disable_unprepare(dsi->dsi_p_clk);
-err_remove_dphy:
- cdns_dphy_remove(dsi->dphy);
-
return ret;
}
@@ -1635,7 +1269,6 @@ static int cdns_dsi_drm_remove(struct platform_device *pdev)
mipi_dsi_host_unregister(&dsi->base);
pm_runtime_disable(&pdev->dev);
- cdns_dphy_remove(dsi->dphy);
return 0;
}
--
git-series 0.9.1
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