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Message-ID: <55EB9E49.90000@rock-chips.com>
Date: Sun, 06 Sep 2015 10:00:41 +0800
From: Yakir Yang <ykk@...k-chips.com>
To: Krzysztof Kozlowski <k.kozlowski@...sung.com>,
Heiko Stuebner <heiko@...ech.de>,
Thierry Reding <treding@...dia.com>,
Jingoo Han <jingoohan1@...il.com>,
Inki Dae <inki.dae@...sung.com>, joe@...ches.com,
Kukjin Kim <kgene@...nel.org>,
Mark Yao <mark.yao@...k-chips.com>
CC: Russell King <rmk+kernel@....linux.org.uk>, djkurtz@...omium.com,
dianders@...omium.com, seanpaul@...omium.com, ajaynumb@...il.com,
Andrzej Hajda <a.hajda@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
David Airlie <airlied@...ux.ie>,
Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
Andy Yan <andy.yan@...k-chips.com>,
Kumar Gala <galak@...eaurora.org>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Kishon Vijay Abraham I <kishon@...com>,
architt@...eaurora.org, robherring2@...il.com,
dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-rockchip@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 05/16] drm: bridge: analogix/dp: dynamic parse sync_pol
& interlace & colorimetry
Hi Krzysztof,
在 09/03/2015 04:04 PM, Krzysztof Kozlowski 写道:
> On 01.09.2015 14:55, Yakir Yang wrote:
>> Both hsync/vsync polarity and interlace mode can be parsed from
>> drm display mode, and dynamic_range and ycbcr_coeff can be judge
>> by the video code, same to color space and color depth can be
>> parsed from EDID.
>>
>> But presumably Exynos still relaies on the DT properties, so take
> s/relaies/relies/
>
>> good use of mode_fixup() in to achieve the compatibility hacks.
>>
>> Signed-off-by: Yakir Yang <ykk@...k-chips.com>
>> ---
>> Changes in v4:
>> - Take Krzysztof suggest, provide backword compatibility with samsung.
>> - Take Thierry suggest, add "color-depth" and "color-space" dynamic parsed.
>>
>> Changes in v3:
>> - Take Thierry Reding suggest, dynamic parse video timing info from
>> struct drm_display_mode and struct drm_display_info.
>>
>> Changes in v2: None
>>
>> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 141 +++++++++++++--------
>> drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 2 +-
>> drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 14 +-
>> drivers/gpu/drm/exynos/exynos_dp.c | 58 ++++++++-
>> 4 files changed, 151 insertions(+), 64 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>> index 7196097..f0db92e 100644
>> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
>> @@ -897,8 +897,8 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
>> return;
>> }
>>
>> - ret = analogix_dp_set_link_train(dp, dp->video_info->lane_count,
>> - dp->video_info->link_rate);
>> + ret = analogix_dp_set_link_train(dp, dp->video_info.lane_count,
>> + dp->video_info.link_rate);
>> if (ret) {
>> dev_err(dp->dev, "unable to do link train\n");
>> return;
>> @@ -1081,6 +1081,82 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
>> dp->dpms_mode = DRM_MODE_DPMS_OFF;
>> }
>>
>> +static void analogix_dp_bridge_mode_set(struct drm_bridge *bridge,
>> + struct drm_display_mode *orig_mode,
>> + struct drm_display_mode *mode)
>> +{
>> + struct analogix_dp_device *dp = bridge->driver_private;
>> + struct drm_display_info *display_info = &dp->connector.display_info;
>> + struct video_info *video_info = &dp->video_info;
>> + struct device_node *dp_node = dp->dev->of_node;
>> + int vic;
>> +
>> + /* interlaces & hsync pol & vsync pol */
>> + video_info->interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
>> + video_info->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
>> + video_info->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
>> +
>> + /* dynamic_range & colorimetry */
>> + vic = drm_match_cea_mode(mode);
>> + if ((vic == 6) || (vic == 7) || (vic == 21) || (vic == 22) ||
>> + (vic == 2) || (vic == 3) || (vic == 17) || (vic == 18)) {
>> + video_info->dynamic_range = CEA;
>> + video_info->ycbcr_coeff = COLOR_YCBCR601;
>> + } else if (vic) {
>> + video_info->dynamic_range = CEA;
>> + video_info->ycbcr_coeff = COLOR_YCBCR709;
>> + } else {
>> + video_info->dynamic_range = VESA;
>> + video_info->ycbcr_coeff = COLOR_YCBCR709;
>> + }
>> +
>> + switch (display_info->bpc) {
>> + case 12:
>> + video_info->color_depth = COLOR_12;
>> + break;
>> + case 10:
>> + video_info->color_depth = COLOR_10;
>> + break;
>> + case 8:
>> + video_info->color_depth = COLOR_8;
>> + break;
>> + case 6:
>> + video_info->color_depth = COLOR_6;
>> + break;
>> + default:
>> + video_info->color_depth = COLOR_8;
>> + break;
>> + }
>> +
>> + if (display_info->color_formats | DRM_COLOR_FORMAT_YCRCB444)
>> + video_info->color_space = COLOR_YCBCR444;
>> + else if (display_info->color_formats | DRM_COLOR_FORMAT_YCRCB422)
>> + video_info->color_space = COLOR_YCBCR422;
>> + else if (display_info->color_formats | DRM_COLOR_FORMAT_RGB444)
>> + video_info->color_space = COLOR_RGB;
>> + else
>> + video_info->color_space = COLOR_RGB;
>> +
>> + /*
>> + * NOTE: those property parseing code is used for
> s/parseing/parsing/
>
> BTW, you can easily integrate spell-check to vim... It is not that I
> search for such misspellings - they are highlighted...
Wow, thanks for your remind, I have set the spell-check now. :)
>
>> + * providing backward compatibility for samsung platform.
>> + */
>> + of_property_read_u32(dp_node, "samsung,color-space",
>> + &video_info->color_space);
>> + of_property_read_u32(dp_node, "samsung,dynamic-range",
>> + &video_info->dynamic_range);
>> + of_property_read_u32(dp_node, "samsung,ycbcr-coeff",
>> + &video_info->ycbcr_coeff);
>> + of_property_read_u32(dp_node, "samsung,color-depth",
>> + &video_info->color_depth);
>> + of_property_read_u32(dp_node, "hsync-active-high",
>> + (unsigned int *)&video_info->h_sync_polarity);
>> + of_property_read_u32(dp_node, "vsync-active-high",
>> + (unsigned int *)&video_info->v_sync_polarity);
>> + of_property_read_u32(dp_node, "interlaced",
>> + (unsigned int *)&video_info->interlaced);
> You made assumption that the sizeof(bool) is always equal to
> sizeof(u32)... Then you cast it to pointer to unsigned int but function
> wants pointer to u32. Just for reading boolean property. There's easier
> way - of_property_read_bool. It returns bool.
Thanks, done.
>
>> +}
>> +
>> static void analogix_dp_bridge_nop(struct drm_bridge *bridge)
>> {
>> /* do nothing */
>> @@ -1091,6 +1167,7 @@ static const struct drm_bridge_funcs analogix_dp_bridge_funcs = {
>> .disable = analogix_dp_bridge_disable,
>> .pre_enable = analogix_dp_bridge_nop,
>> .post_disable = analogix_dp_bridge_nop,
>> + .mode_set = analogix_dp_bridge_mode_set,
>> .attach = analogix_dp_bridge_attach,
>> };
>>
>> @@ -1121,62 +1198,24 @@ static int analogix_dp_create_bridge(struct drm_device *drm_dev,
>> return 0;
>> }
>>
>> -static struct video_info *analogix_dp_dt_parse_pdata(struct device *dev)
>> +static int analogix_dp_dt_parse_pdata(struct analogix_dp_device *dp)
>> {
>> - struct device_node *dp_node = dev->of_node;
>> - struct video_info *dp_video_config;
>> -
>> - dp_video_config = devm_kzalloc(dev, sizeof(*dp_video_config),
>> - GFP_KERNEL);
>> - if (!dp_video_config)
>> - return ERR_PTR(-ENOMEM);
>> -
>> - dp_video_config->h_sync_polarity =
>> - of_property_read_bool(dp_node, "hsync-active-high");
>> -
>> - dp_video_config->v_sync_polarity =
>> - of_property_read_bool(dp_node, "vsync-active-high");
>> -
>> - dp_video_config->interlaced =
>> - of_property_read_bool(dp_node, "interlaced");
>> -
>> - if (of_property_read_u32(dp_node, "samsung,color-space",
>> - &dp_video_config->color_space)) {
>> - dev_err(dev, "failed to get color-space\n");
>> - return ERR_PTR(-EINVAL);
>> - }
>> -
>> - if (of_property_read_u32(dp_node, "samsung,dynamic-range",
>> - &dp_video_config->dynamic_range)) {
>> - dev_err(dev, "failed to get dynamic-range\n");
>> - return ERR_PTR(-EINVAL);
>> - }
>> -
>> - if (of_property_read_u32(dp_node, "samsung,ycbcr-coeff",
>> - &dp_video_config->ycbcr_coeff)) {
>> - dev_err(dev, "failed to get ycbcr-coeff\n");
>> - return ERR_PTR(-EINVAL);
>> - }
>> -
>> - if (of_property_read_u32(dp_node, "samsung,color-depth",
>> - &dp_video_config->color_depth)) {
>> - dev_err(dev, "failed to get color-depth\n");
>> - return ERR_PTR(-EINVAL);
>> - }
>> + struct device_node *dp_node = dp->dev->of_node;
>> + struct video_info *video_config = &dp->video_info;
>>
>> if (of_property_read_u32(dp_node, "samsung,link-rate",
>> - &dp_video_config->link_rate)) {
>> + &video_info->link_rate)) {
>> dev_err(dev, "failed to get link-rate\n");
>> - return ERR_PTR(-EINVAL);
>> + return -EINVAL;
>> }
>>
>> if (of_property_read_u32(dp_node, "samsung,lane-count",
>> - &dp_video_config->lane_count)) {
>> + &video_info->lane_count)) {
>> dev_err(dev, "failed to get lane-count\n");
>> - return ERR_PTR(-EINVAL);
>> + return -EINVAL;
>> }
>>
>> - return dp_video_config;
>> + return 0;
>> }
>>
>> int analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>> @@ -1205,9 +1244,9 @@ int analogix_dp_bind(struct device *dev, struct drm_device *drm_dev,
>> */
>> dp->plat_data = plat_data;
>>
>> - dp->video_info = analogix_dp_dt_parse_pdata(&pdev->dev);
>> - if (IS_ERR(dp->video_info))
>> - return PTR_ERR(dp->video_info);
>> + ret = analogix_dp_dt_parse_pdata(dp);
>> + if (ret)
>> + return ret;
>>
>> dp->phy = devm_phy_get(dp->dev, "dp");
>> if (IS_ERR(dp->phy)) {
>> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
>> index ffabbd0..6e3d5bc 100644
>> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
>> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
>> @@ -154,7 +154,7 @@ struct analogix_dp_device {
>> unsigned int irq;
>> void __iomem *reg_base;
>>
>> - struct video_info *video_info;
>> + struct video_info video_info;
>> struct link_train link_train;
>> struct work_struct hotplug_work;
>> struct phy *phy;
>> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
>> index b879d8c..6a643be 100644
>> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
>> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
>> @@ -1084,15 +1084,15 @@ void analogix_dp_set_video_color_format(struct analogix_dp_device *dp)
>> u32 reg;
>>
>> /* Configure the input color depth, color space, dynamic range */
>> - reg = (dp->video_info->dynamic_range << IN_D_RANGE_SHIFT) |
>> - (dp->video_info->color_depth << IN_BPC_SHIFT) |
>> - (dp->video_info->color_space << IN_COLOR_F_SHIFT);
>> + reg = (dp->video_info.dynamic_range << IN_D_RANGE_SHIFT) |
>> + (dp->video_info.color_depth << IN_BPC_SHIFT) |
>> + (dp->video_info.color_space << IN_COLOR_F_SHIFT);
>> writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_2);
>>
>> /* Set Input Color YCbCr Coefficients to ITU601 or ITU709 */
>> reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
>> reg &= ~IN_YC_COEFFI_MASK;
>> - if (dp->video_info->ycbcr_coeff)
>> + if (dp->video_info.ycbcr_coeff)
>> reg |= IN_YC_COEFFI_ITU709;
>> else
>> reg |= IN_YC_COEFFI_ITU601;
>> @@ -1229,17 +1229,17 @@ void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp)
>>
>> reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
>> reg &= ~INTERACE_SCAN_CFG;
>> - reg |= (dp->video_info->interlaced << 2);
>> + reg |= (dp->video_info.interlaced << 2);
>> writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
>>
>> reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
>> reg &= ~VSYNC_POLARITY_CFG;
>> - reg |= (dp->video_info->v_sync_polarity << 1);
>> + reg |= (dp->video_info.v_sync_polarity << 1);
>> writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
>>
>> reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
>> reg &= ~HSYNC_POLARITY_CFG;
>> - reg |= (dp->video_info->h_sync_polarity << 0);
>> + reg |= (dp->video_info.h_sync_polarity << 0);
>> writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
>>
>> reg = AUDIO_MODE_SPDIF_MODE | VIDEO_MODE_SLAVE_MODE;
>> diff --git a/drivers/gpu/drm/exynos/exynos_dp.c b/drivers/gpu/drm/exynos/exynos_dp.c
>> index 7e1be72..6060d2c 100644
>> --- a/drivers/gpu/drm/exynos/exynos_dp.c
>> +++ b/drivers/gpu/drm/exynos/exynos_dp.c
>> @@ -28,8 +28,13 @@
>>
>> #include "exynos_drm_crtc.h"
>>
>> -#define plat_data_to_dp(pd) \
>> - container_of(pd, struct exynos_dp_device, plat_data)
>> +#define to_dp(nm) container_of(nm, struct exynos_dp_device, nm)
>> +
>> +struct video_info {
>> + bool h_sync_polarity;
>> + bool v_sync_polarity;
>> + bool interlaced;
>> +};
>>
>> struct exynos_dp_device {
>> struct drm_encoder encoder;
>> @@ -39,12 +44,13 @@ struct exynos_dp_device {
>>
>> struct exynos_drm_panel_info priv;
>> struct analogix_dp_plat_data plat_data;
>> + struct video_info video_info;
>> };
>>
>> int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data,
>> bool enable)
>> {
>> - struct exynos_dp_device *dp = plat_data_to_dp(plat_data);
>> + struct exynos_dp_device *dp = to_dp(plat_data);
>> struct drm_encoder *encoder = &dp->encoder;
>> struct exynos_drm_crtc *crtc;
>>
>> @@ -71,7 +77,7 @@ static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data)
>> static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
>> struct drm_connector *connector)
>> {
>> - struct exynos_dp_device *dp = plat_data_to_dp(plat_data);
>> + struct exynos_dp_device *dp = to_dp(plat_data);
>> struct drm_display_mode *mode;
>>
>> if (dp->plat_data.panel)
>> @@ -99,7 +105,7 @@ static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data,
>> static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data,
>> struct drm_bridge *bridge)
>> {
>> - struct exynos_dp_device *dp = plat_data_to_dp(plat_data);
>> + struct exynos_dp_device *dp = to_dp(plat_data);
>> struct drm_encoder *encoder = &dp->encoder;
>> int ret;
>>
>> @@ -122,6 +128,28 @@ static bool exynos_dp_mode_fixup(struct drm_encoder *encoder,
>> const struct drm_display_mode *mode,
>> struct drm_display_mode *adjusted_mode)
>> {
>> + struct exynos_dp_device *dp = to_dp(encoder);
>> + int flags = adjusted_mode->flags;
>> +
>> + flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC |
>> + DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC |
>> + DRM_MODE_FLAG_INTERLACE);
>> +
>> + if (dp->video_info.h_sync_polarity)
>> + flags |= DRM_MODE_FLAG_PHSYNC;
>> + else
>> + flags |= DRM_MODE_FLAG_NHSYNC;
>> +
>> + if (dp->video_info.v_sync_polarity)
>> + flags |= DRM_MODE_FLAG_PVSYNC;
>> + else
>> + flags |= DRM_MODE_FLAG_NVSYNC;
>> +
>> + if (dp->video_info.interlaced)
>> + flags |= DRM_MODE_FLAG_INTERLACE;
>> +
>> + adjusted_mode->flags = flags;
>> +
>> return true;
>> }
>>
>> @@ -163,6 +191,22 @@ static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp)
>> return 0;
>> }
>>
>> +static int exynos_dp_dt_parse_video_info(struct exynos_dp_device *dp)
>> +{
>> + struct device_node *dp_node = dp->dev->of_node;
>> +
>> + dp->video_info.h_sync_polarity =
>> + of_property_read_bool(dp_node, "hsync-active-high");
>> +
>> + dp->video_info.v_sync_polarity =
>> + of_property_read_bool(dp_node, "vsync-active-high");
>> +
>> + dp->video_info.interlaced =
>> + of_property_read_bool(dp_node, "interlaced");
>> +
>> + return 0;
> Probably you wanted to follow the convention of other DT-parse functions
> but there is no need. This function cannot fail so maybe make it void?
> It would simplify a bit the code in exynos_dp_bind().
Actually, I found an mistaken here. I have parsed those two property for
twice,
one is here, the other is analogix_dp_core.c mode_set() function.
/*
* NOTE: those property parseing code is used for
* providing backward compatibility for samsung platform.
*/
[....]
of_property_read_u32(dp_node, "hsync-active-high",
(unsigned int *)&video_info->h_sync_polarity);
of_property_read_u32(dp_node, "vsync-active-high",
(unsigned int *)&video_info->v_sync_polarity);
of_property_read_u32(dp_node, "interlaced",
(unsigned int *)&video_info->interlaced);
And I think it would be easy to code when I achieve the backward
compatibility
in analogix core driver. So I prefer this way :-)
Anyway, thanks,
- Yakir
> Best regards,
> Krzysztof
>
>
>
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