| Message ID | 20180309222327.18689-17-enric.balletbo@collabora.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote: > From: Lin Huang <hl@rock-chips.com> > > We need to check the dpcd write/read return value to see whether the > write/read was successful > Reviewed-by: Archit Taneja <architt@codeaurora.org> Thanks, Archit > Cc: Kristian H. Kristensen <hoegsberg@chromium.org> > Signed-off-by: Lin Huang <hl@rock-chips.com> > Signed-off-by: zain wang <wzz@rock-chips.com> > Signed-off-by: Douglas Anderson <dianders@chromium.org> > Signed-off-by: Sean Paul <seanpaul@chromium.org> > Signed-off-by: Thierry Escande <thierry.escande@collabora.com> > Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> > Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> > Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > > drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 169 ++++++++++++++++----- > 1 file changed, 127 insertions(+), 42 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > index 1eed35f9eb8d..be6eddd0d0a7 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > @@ -160,80 +160,137 @@ int analogix_dp_disable_psr(struct analogix_dp_device *dp) > } > EXPORT_SYMBOL_GPL(analogix_dp_disable_psr); > > -static bool analogix_dp_detect_sink_psr(struct analogix_dp_device *dp) > +static int analogix_dp_detect_sink_psr(struct analogix_dp_device *dp) > { > unsigned char psr_version; > + int ret; > + > + ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_SUPPORT, &psr_version); > + if (ret != 1) { > + dev_err(dp->dev, "failed to get PSR version, disable it\n"); > + return ret; > + } > > - drm_dp_dpcd_readb(&dp->aux, DP_PSR_SUPPORT, &psr_version); > dev_dbg(dp->dev, "Panel PSR version : %x\n", psr_version); > > - return (psr_version & DP_PSR_IS_SUPPORTED) ? true : false; > + dp->psr_enable = (psr_version & DP_PSR_IS_SUPPORTED) ? true : false; > + > + return 0; > } > > -static void analogix_dp_enable_sink_psr(struct analogix_dp_device *dp) > +static int analogix_dp_enable_sink_psr(struct analogix_dp_device *dp) > { > unsigned char psr_en; > + int ret; > > /* Disable psr function */ > - drm_dp_dpcd_readb(&dp->aux, DP_PSR_EN_CFG, &psr_en); > + ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_EN_CFG, &psr_en); > + if (ret != 1) { > + dev_err(dp->dev, "failed to get psr config\n"); > + goto end; > + } > + > psr_en &= ~DP_PSR_ENABLE; > - drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); > + if (ret != 1) { > + dev_err(dp->dev, "failed to disable panel psr\n"); > + goto end; > + } > > /* Main-Link transmitter remains active during PSR active states */ > psr_en = DP_PSR_MAIN_LINK_ACTIVE | DP_PSR_CRC_VERIFICATION; > - drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); > + if (ret != 1) { > + dev_err(dp->dev, "failed to set panel psr\n"); > + goto end; > + } > > /* Enable psr function */ > psr_en = DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE | > DP_PSR_CRC_VERIFICATION; > - drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); > + if (ret != 1) { > + dev_err(dp->dev, "failed to set panel psr\n"); > + goto end; > + } > > analogix_dp_enable_psr_crc(dp); > + > + return 0; > +end: > + dev_err(dp->dev, "enable psr fail, force to disable psr\n"); > + dp->psr_enable = false; > + > + return ret; > } > > -static void > +static int > analogix_dp_enable_rx_to_enhanced_mode(struct analogix_dp_device *dp, > bool enable) > { > u8 data; > + int ret; > > - drm_dp_dpcd_readb(&dp->aux, DP_LANE_COUNT_SET, &data); > + ret = drm_dp_dpcd_readb(&dp->aux, DP_LANE_COUNT_SET, &data); > + if (ret != 1) > + return ret; > > if (enable) > - drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, > - DP_LANE_COUNT_ENHANCED_FRAME_EN | > - DPCD_LANE_COUNT_SET(data)); > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, > + DP_LANE_COUNT_ENHANCED_FRAME_EN | > + DPCD_LANE_COUNT_SET(data)); > else > - drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, > - DPCD_LANE_COUNT_SET(data)); > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, > + DPCD_LANE_COUNT_SET(data)); > + > + return ret < 0 ? ret : 0; > } > > -static int analogix_dp_is_enhanced_mode_available(struct analogix_dp_device *dp) > +static int analogix_dp_is_enhanced_mode_available(struct analogix_dp_device *dp, > + u8 *enhanced_mode_support) > { > u8 data; > - int retval; > + int ret; > > - drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data); > - retval = DPCD_ENHANCED_FRAME_CAP(data); > + ret = drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data); > + if (ret != 1) { > + *enhanced_mode_support = 0; > + return ret; > + } > > - return retval; > + *enhanced_mode_support = DPCD_ENHANCED_FRAME_CAP(data); > + > + return 0; > } > > -static void analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp) > +static int analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp) > { > u8 data; > + int ret; > + > + ret = analogix_dp_is_enhanced_mode_available(dp, &data); > + if (ret < 0) > + return ret; > + > + ret = analogix_dp_enable_rx_to_enhanced_mode(dp, data); > + if (ret < 0) > + return ret; > > - data = analogix_dp_is_enhanced_mode_available(dp); > - analogix_dp_enable_rx_to_enhanced_mode(dp, data); > analogix_dp_enable_enhanced_mode(dp, data); > + > + return 0; > } > > -static void analogix_dp_training_pattern_dis(struct analogix_dp_device *dp) > +static int analogix_dp_training_pattern_dis(struct analogix_dp_device *dp) > { > + int ret; > + > analogix_dp_set_training_pattern(dp, DP_NONE); > > - drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, > - DP_TRAINING_PATTERN_DISABLE); > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, > + DP_TRAINING_PATTERN_DISABLE); > + > + return ret < 0 ? ret : 0; > } > > static void > @@ -282,7 +339,11 @@ static int analogix_dp_link_start(struct analogix_dp_device *dp) > if (retval < 0) > return retval; > /* set enhanced mode if available */ > - analogix_dp_set_enhanced_mode(dp); > + retval = analogix_dp_set_enhanced_mode(dp); > + if (retval < 0) { > + dev_err(dp->dev, "failed to set enhance mode\n"); > + return retval; > + } > > /* Set TX pre-emphasis to minimum */ > for (lane = 0; lane < lane_count; lane++) > @@ -567,10 +628,11 @@ static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp) > > if (!analogix_dp_channel_eq_ok(link_status, link_align, lane_count)) { > /* traing pattern Set to Normal */ > - analogix_dp_training_pattern_dis(dp); > + retval = analogix_dp_training_pattern_dis(dp); > + if (retval < 0) > + return retval; > > dev_info(dp->dev, "Link Training success!\n"); > - > analogix_dp_get_link_bandwidth(dp, ®); > dp->link_train.link_rate = reg; > dev_dbg(dp->dev, "final bandwidth = %.2x\n", > @@ -867,24 +929,32 @@ static int analogix_dp_config_video(struct analogix_dp_device *dp) > return 0; > } > > -static void analogix_dp_enable_scramble(struct analogix_dp_device *dp, > - bool enable) > +static int analogix_dp_enable_scramble(struct analogix_dp_device *dp, > + bool enable) > { > u8 data; > + int ret; > > if (enable) { > analogix_dp_enable_scrambling(dp); > > - drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, &data); > - drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, > + ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, > + &data); > + if (ret != 1) > + return ret; > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, > (u8)(data & ~DP_LINK_SCRAMBLING_DISABLE)); > } else { > analogix_dp_disable_scrambling(dp); > > - drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, &data); > - drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, > + ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, > + &data); > + if (ret != 1) > + return ret; > + ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, > (u8)(data | DP_LINK_SCRAMBLING_DISABLE)); > } > + return ret < 0 ? ret : 0; > } > > static irqreturn_t analogix_dp_hardirq(int irq, void *arg) > @@ -939,23 +1009,36 @@ static int analogix_dp_commit(struct analogix_dp_device *dp) > return ret; > } > > - analogix_dp_enable_scramble(dp, 1); > + ret = analogix_dp_enable_scramble(dp, 1); > + if (ret < 0) { > + dev_err(dp->dev, "can not enable scramble\n"); > + return ret; > + } > > analogix_dp_init_video(dp); > ret = analogix_dp_config_video(dp); > - if (ret) > + if (ret) { > dev_err(dp->dev, "unable to config video\n"); > + return ret; > + } > > /* Safe to enable the panel now */ > if (dp->plat_data->panel) { > - if (drm_panel_enable(dp->plat_data->panel)) > + ret = drm_panel_enable(dp->plat_data->panel); > + if (ret) { > DRM_ERROR("failed to enable the panel\n"); > + return ret; > + } > } > > - dp->psr_enable = analogix_dp_detect_sink_psr(dp); > + ret = analogix_dp_detect_sink_psr(dp); > + if (ret) > + return ret; > + > if (dp->psr_enable) > - analogix_dp_enable_sink_psr(dp); > - return 0; > + ret = analogix_dp_enable_sink_psr(dp); > + > + return ret; > } > > /* > @@ -1185,8 +1268,10 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) > } > > ret = analogix_dp_commit(dp); > - if (ret) > + if (ret) { > + DRM_ERROR("dp commit error, ret = %d\n", ret); > goto out_dp_init; > + } > > enable_irq(dp->irq); > return 0; > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 1eed35f9eb8d..be6eddd0d0a7 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -160,80 +160,137 @@ int analogix_dp_disable_psr(struct analogix_dp_device *dp) } EXPORT_SYMBOL_GPL(analogix_dp_disable_psr); -static bool analogix_dp_detect_sink_psr(struct analogix_dp_device *dp) +static int analogix_dp_detect_sink_psr(struct analogix_dp_device *dp) { unsigned char psr_version; + int ret; + + ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_SUPPORT, &psr_version); + if (ret != 1) { + dev_err(dp->dev, "failed to get PSR version, disable it\n"); + return ret; + } - drm_dp_dpcd_readb(&dp->aux, DP_PSR_SUPPORT, &psr_version); dev_dbg(dp->dev, "Panel PSR version : %x\n", psr_version); - return (psr_version & DP_PSR_IS_SUPPORTED) ? true : false; + dp->psr_enable = (psr_version & DP_PSR_IS_SUPPORTED) ? true : false; + + return 0; } -static void analogix_dp_enable_sink_psr(struct analogix_dp_device *dp) +static int analogix_dp_enable_sink_psr(struct analogix_dp_device *dp) { unsigned char psr_en; + int ret; /* Disable psr function */ - drm_dp_dpcd_readb(&dp->aux, DP_PSR_EN_CFG, &psr_en); + ret = drm_dp_dpcd_readb(&dp->aux, DP_PSR_EN_CFG, &psr_en); + if (ret != 1) { + dev_err(dp->dev, "failed to get psr config\n"); + goto end; + } + psr_en &= ~DP_PSR_ENABLE; - drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); + ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); + if (ret != 1) { + dev_err(dp->dev, "failed to disable panel psr\n"); + goto end; + } /* Main-Link transmitter remains active during PSR active states */ psr_en = DP_PSR_MAIN_LINK_ACTIVE | DP_PSR_CRC_VERIFICATION; - drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); + ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); + if (ret != 1) { + dev_err(dp->dev, "failed to set panel psr\n"); + goto end; + } /* Enable psr function */ psr_en = DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE | DP_PSR_CRC_VERIFICATION; - drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); + ret = drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en); + if (ret != 1) { + dev_err(dp->dev, "failed to set panel psr\n"); + goto end; + } analogix_dp_enable_psr_crc(dp); + + return 0; +end: + dev_err(dp->dev, "enable psr fail, force to disable psr\n"); + dp->psr_enable = false; + + return ret; } -static void +static int analogix_dp_enable_rx_to_enhanced_mode(struct analogix_dp_device *dp, bool enable) { u8 data; + int ret; - drm_dp_dpcd_readb(&dp->aux, DP_LANE_COUNT_SET, &data); + ret = drm_dp_dpcd_readb(&dp->aux, DP_LANE_COUNT_SET, &data); + if (ret != 1) + return ret; if (enable) - drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, - DP_LANE_COUNT_ENHANCED_FRAME_EN | - DPCD_LANE_COUNT_SET(data)); + ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, + DP_LANE_COUNT_ENHANCED_FRAME_EN | + DPCD_LANE_COUNT_SET(data)); else - drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, - DPCD_LANE_COUNT_SET(data)); + ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, + DPCD_LANE_COUNT_SET(data)); + + return ret < 0 ? ret : 0; } -static int analogix_dp_is_enhanced_mode_available(struct analogix_dp_device *dp) +static int analogix_dp_is_enhanced_mode_available(struct analogix_dp_device *dp, + u8 *enhanced_mode_support) { u8 data; - int retval; + int ret; - drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data); - retval = DPCD_ENHANCED_FRAME_CAP(data); + ret = drm_dp_dpcd_readb(&dp->aux, DP_MAX_LANE_COUNT, &data); + if (ret != 1) { + *enhanced_mode_support = 0; + return ret; + } - return retval; + *enhanced_mode_support = DPCD_ENHANCED_FRAME_CAP(data); + + return 0; } -static void analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp) +static int analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp) { u8 data; + int ret; + + ret = analogix_dp_is_enhanced_mode_available(dp, &data); + if (ret < 0) + return ret; + + ret = analogix_dp_enable_rx_to_enhanced_mode(dp, data); + if (ret < 0) + return ret; - data = analogix_dp_is_enhanced_mode_available(dp); - analogix_dp_enable_rx_to_enhanced_mode(dp, data); analogix_dp_enable_enhanced_mode(dp, data); + + return 0; } -static void analogix_dp_training_pattern_dis(struct analogix_dp_device *dp) +static int analogix_dp_training_pattern_dis(struct analogix_dp_device *dp) { + int ret; + analogix_dp_set_training_pattern(dp, DP_NONE); - drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, - DP_TRAINING_PATTERN_DISABLE); + ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, + DP_TRAINING_PATTERN_DISABLE); + + return ret < 0 ? ret : 0; } static void @@ -282,7 +339,11 @@ static int analogix_dp_link_start(struct analogix_dp_device *dp) if (retval < 0) return retval; /* set enhanced mode if available */ - analogix_dp_set_enhanced_mode(dp); + retval = analogix_dp_set_enhanced_mode(dp); + if (retval < 0) { + dev_err(dp->dev, "failed to set enhance mode\n"); + return retval; + } /* Set TX pre-emphasis to minimum */ for (lane = 0; lane < lane_count; lane++) @@ -567,10 +628,11 @@ static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp) if (!analogix_dp_channel_eq_ok(link_status, link_align, lane_count)) { /* traing pattern Set to Normal */ - analogix_dp_training_pattern_dis(dp); + retval = analogix_dp_training_pattern_dis(dp); + if (retval < 0) + return retval; dev_info(dp->dev, "Link Training success!\n"); - analogix_dp_get_link_bandwidth(dp, ®); dp->link_train.link_rate = reg; dev_dbg(dp->dev, "final bandwidth = %.2x\n", @@ -867,24 +929,32 @@ static int analogix_dp_config_video(struct analogix_dp_device *dp) return 0; } -static void analogix_dp_enable_scramble(struct analogix_dp_device *dp, - bool enable) +static int analogix_dp_enable_scramble(struct analogix_dp_device *dp, + bool enable) { u8 data; + int ret; if (enable) { analogix_dp_enable_scrambling(dp); - drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, &data); - drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, + ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, + &data); + if (ret != 1) + return ret; + ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, (u8)(data & ~DP_LINK_SCRAMBLING_DISABLE)); } else { analogix_dp_disable_scrambling(dp); - drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, &data); - drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, + ret = drm_dp_dpcd_readb(&dp->aux, DP_TRAINING_PATTERN_SET, + &data); + if (ret != 1) + return ret; + ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET, (u8)(data | DP_LINK_SCRAMBLING_DISABLE)); } + return ret < 0 ? ret : 0; } static irqreturn_t analogix_dp_hardirq(int irq, void *arg) @@ -939,23 +1009,36 @@ static int analogix_dp_commit(struct analogix_dp_device *dp) return ret; } - analogix_dp_enable_scramble(dp, 1); + ret = analogix_dp_enable_scramble(dp, 1); + if (ret < 0) { + dev_err(dp->dev, "can not enable scramble\n"); + return ret; + } analogix_dp_init_video(dp); ret = analogix_dp_config_video(dp); - if (ret) + if (ret) { dev_err(dp->dev, "unable to config video\n"); + return ret; + } /* Safe to enable the panel now */ if (dp->plat_data->panel) { - if (drm_panel_enable(dp->plat_data->panel)) + ret = drm_panel_enable(dp->plat_data->panel); + if (ret) { DRM_ERROR("failed to enable the panel\n"); + return ret; + } } - dp->psr_enable = analogix_dp_detect_sink_psr(dp); + ret = analogix_dp_detect_sink_psr(dp); + if (ret) + return ret; + if (dp->psr_enable) - analogix_dp_enable_sink_psr(dp); - return 0; + ret = analogix_dp_enable_sink_psr(dp); + + return ret; } /* @@ -1185,8 +1268,10 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp) } ret = analogix_dp_commit(dp); - if (ret) + if (ret) { + DRM_ERROR("dp commit error, ret = %d\n", ret); goto out_dp_init; + } enable_irq(dp->irq); return 0;