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Message-ID: <5750379F.2050007@rock-chips.com>
Date: Thu, 2 Jun 2016 21:41:51 +0800
From: Yakir Yang <ykk@...k-chips.com>
To: Mark Yao <yzq@...k-chips.com>, Inki Dae <inki.dae@...sung.com>,
Heiko Stuebner <heiko@...ech.de>,
Tomasz Figa <tfiga@...omium.org>,
Jingoo Han <jingoohan1@...il.com>
Cc: David Airlie <airlied@...ux.ie>, daniel.vetter@...ll.ch,
Thierry Reding <treding@...dia.com>, dianders@...omium.org,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
emil.l.velikov@...il.com, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org, linux-samsung-soc@...r.kernel.org,
"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>
Subject: Re: [RFC PATCH v2 1/3] drm: bridge/analogix_dp: add the PSR function
support
Hi all,
Sorry about the CC list, I lose some guys here, just add them back.
On 06/02/2016 08:57 PM, Yakir Yang wrote:
> The full name of PSR is Panel Self Refresh, panel device could refresh
> itself with the hardware framebuffer in panel, this would make lots of
> sense to save the power consumption.
>
> This patch have export two symbols for platform driver:
> analogix_dp_active_psr()
> analogix_dp_inactive_psr()
>
> Signed-off-by: Yakir Yang <ykk@...k-chips.com>
> ---
> Changes in v2:
> - Introduce in v2, splite the common Analogix DP changes out
>
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 69 ++++++++++++++++++++++
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 4 ++
> drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 54 +++++++++++++++++
> drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h | 28 +++++++++
> include/drm/bridge/analogix_dp.h | 3 +
> 5 files changed, 158 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index 5af9ce4..a66ccb6 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -39,6 +39,72 @@ struct bridge_init {
> struct device_node *node;
> };
>
> +int analogix_dp_actice_psr(struct device *dev)
> +{
> + struct analogix_dp_device *dp = dev_get_drvdata(dev);
> +
> + if (!dp->psr_support)
> + return -EINVAL;
> +
> + analogix_dp_send_vsc(dp, EDP_VSC_PSR_STATE_ACTIVE |
> + EDP_VSC_PSR_CRC_VALUES_VALID);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(analogix_dp_actice_psr);
> +
> +int analogix_dp_inactice_psr(struct device *dev)
> +{
> + struct analogix_dp_device *dp = dev_get_drvdata(dev);
> +
> + if (!dp->psr_support)
> + return -EINVAL;
> +
> + analogix_dp_send_vsc(dp, 0);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(analogix_dp_inactice_psr);
> +
> +int analogix_dp_enable_psr(struct analogix_dp_device *dp)
> +{
> + unsigned char psr_version, psr_caps;
> + unsigned char psr_en;
> +
> + /* disable psr function */
> + analogix_dp_read_byte_from_dpcd(dp, DP_PSR_EN_CFG, &psr_en);
> + psr_en &= ~DP_PSR_ENABLE;
> + analogix_dp_write_byte_to_dpcd(dp, DP_PSR_EN_CFG, psr_en);
> +
> + /* check panel psr version */
> + analogix_dp_read_byte_from_dpcd(dp, DP_PSR_SUPPORT, &psr_version);
> + analogix_dp_read_byte_from_dpcd(dp, DP_PSR_CAPS, &psr_caps);
> + dev_info(dp->dev, "Panel PSR version : %x.%x\n", psr_version, psr_caps);
> +
> + if (!(psr_version & DP_PSR_IS_SUPPORTED))
> + return -1;
> +
> + /* Main-Link transmitter remains active during PSR active states */
> + analogix_dp_read_byte_from_dpcd(dp, DP_PSR_EN_CFG, &psr_en);
> + psr_en = DP_PSR_MAIN_LINK_ACTIVE | DP_PSR_CRC_VERIFICATION;
> + analogix_dp_write_byte_to_dpcd(dp, DP_PSR_EN_CFG, psr_en);
> +
> + /* enable PSR function */
> + analogix_dp_read_byte_from_dpcd(dp, DP_PSR_EN_CFG, &psr_en);
> + psr_en = DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE |
> + DP_PSR_CRC_VERIFICATION;
> + analogix_dp_write_byte_to_dpcd(dp, DP_PSR_EN_CFG, psr_en);
> +
> + /* read sink psr state */
> + analogix_dp_read_byte_from_dpcd(dp, DP_PSR_EN_CFG, &psr_en);
> + dev_info(dp->dev, "DP_PSR_EN_CFG: %x\n", psr_en);
> +
> + analogix_dp_enable_psr_crc(dp);
> + dp->psr_support = true;
> +
> + return 0;
> +}
> +
> static void analogix_dp_init_dp(struct analogix_dp_device *dp)
> {
> analogix_dp_reset(dp);
> @@ -921,6 +987,9 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
>
> /* Enable video */
> analogix_dp_start_video(dp);
> +
> + /* Enable PSR support */
> + analogix_dp_enable_psr(dp);
> }
>
> int analogix_dp_get_modes(struct drm_connector *connector)
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
> index b456380..2d1dae2 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
> @@ -177,6 +177,7 @@ struct analogix_dp_device {
> int hpd_gpio;
> bool force_hpd;
> unsigned char edid[EDID_BLOCK_LENGTH * 2];
> + bool psr_support;
>
> struct analogix_dp_plat_data *plat_data;
> };
> @@ -278,4 +279,7 @@ int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp);
> void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp);
> void analogix_dp_enable_scrambling(struct analogix_dp_device *dp);
> void analogix_dp_disable_scrambling(struct analogix_dp_device *dp);
> +void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp);
> +void analogix_dp_send_vsc(struct analogix_dp_device *dp, int db1);
> +
> #endif /* _ANALOGIX_DP_CORE_H */
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> index 31366bf..8d8c37a 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> @@ -1322,3 +1322,57 @@ void analogix_dp_disable_scrambling(struct analogix_dp_device *dp)
> reg |= SCRAMBLING_DISABLE;
> writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
> }
> +
> +void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp)
> +{
> + writel(PSR_VID_CRC_FLUSH | PSR_VID_CRC_ENABLE,
> + dp->reg_base + ANALOGIX_DP_CRC_CON);
> +
> + usleep_range(10, 20);
> +
> + writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON);
> +}
> +
> +void analogix_dp_send_vsc(struct analogix_dp_device *dp, int db1)
> +{
> + unsigned int val;
> +
> + /* don't send info frame */
> + val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
> + val &= ~IF_EN;
> + writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
> +
> + /* configure single frame update mode */
> + writel(0x3, dp->reg_base + ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL);
> +
> + /* configure VSC HB0 ~ HB3 */
> + writel(0x00, dp->reg_base + ANALOGIX_DP_SPD_HB0);
> + writel(0x07, dp->reg_base + ANALOGIX_DP_SPD_HB1);
> + writel(0x02, dp->reg_base + ANALOGIX_DP_SPD_HB2);
> + writel(0x08, dp->reg_base + ANALOGIX_DP_SPD_HB3);
> +
> + /* configure VSC HB0 ~ HB3 */
> + writel(0x00, dp->reg_base + ANALOGIX_DP_SPD_PB0);
> + writel(0x16, dp->reg_base + ANALOGIX_DP_SPD_PB1);
> + writel(0xCE, dp->reg_base + ANALOGIX_DP_SPD_PB2);
> + writel(0x5D, dp->reg_base + ANALOGIX_DP_SPD_PB3);
> +
> + /* configure DB0 / DB1 values */
> + writel(0x00, dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB0);
> + writel(db1, dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB1);
> +
> + /* set reuse spd inforframe */
> + val = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
> + val |= REUSE_SPD_EN;
> + writel(val, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
> +
> + /* mark info frame update */
> + val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
> + val = (val | IF_UP) & ~IF_EN;
> + writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
> +
> + /* send info frame */
> + val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
> + val |= IF_EN;
> + writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
> +}
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
> index cdcc6c5..a2698e4 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h
> @@ -22,6 +22,8 @@
> #define ANALOGIX_DP_VIDEO_CTL_8 0x3C
> #define ANALOGIX_DP_VIDEO_CTL_10 0x44
>
> +#define ANALOGIX_DP_SPDIF_AUDIO_CTL_0 0xD8
> +
> #define ANALOGIX_DP_PLL_REG_1 0xfc
> #define ANALOGIX_DP_PLL_REG_2 0x9e4
> #define ANALOGIX_DP_PLL_REG_3 0x9e8
> @@ -30,6 +32,21 @@
>
> #define ANALOGIX_DP_PD 0x12c
>
> +#define ANALOGIX_DP_IF_TYPE 0x244
> +#define ANALOGIX_DP_IF_PKT_DB1 0x254
> +#define ANALOGIX_DP_IF_PKT_DB2 0x258
> +#define ANALOGIX_DP_SPD_HB0 0x2F8
> +#define ANALOGIX_DP_SPD_HB1 0x2FC
> +#define ANALOGIX_DP_SPD_HB2 0x300
> +#define ANALOGIX_DP_SPD_HB3 0x304
> +#define ANALOGIX_DP_SPD_PB0 0x308
> +#define ANALOGIX_DP_SPD_PB1 0x30C
> +#define ANALOGIX_DP_SPD_PB2 0x310
> +#define ANALOGIX_DP_SPD_PB3 0x314
> +#define ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL 0x318
> +#define ANALOGIX_DP_VSC_SHADOW_DB0 0x31C
> +#define ANALOGIX_DP_VSC_SHADOW_DB1 0x320
> +
> #define ANALOGIX_DP_LANE_MAP 0x35C
>
> #define ANALOGIX_DP_ANALOG_CTL_1 0x370
> @@ -103,6 +120,8 @@
>
> #define ANALOGIX_DP_SOC_GENERAL_CTL 0x800
>
> +#define ANALOGIX_DP_CRC_CON 0x890
> +
> /* ANALOGIX_DP_TX_SW_RESET */
> #define RESET_DP_TX (0x1 << 0)
>
> @@ -151,6 +170,7 @@
> #define VID_CHK_UPDATE_TYPE_SHIFT (4)
> #define VID_CHK_UPDATE_TYPE_1 (0x1 << 4)
> #define VID_CHK_UPDATE_TYPE_0 (0x0 << 4)
> +#define REUSE_SPD_EN (0x1 << 3)
>
> /* ANALOGIX_DP_VIDEO_CTL_8 */
> #define VID_HRES_TH(x) (((x) & 0xf) << 4)
> @@ -376,4 +396,12 @@
> #define VIDEO_MODE_SLAVE_MODE (0x1 << 0)
> #define VIDEO_MODE_MASTER_MODE (0x0 << 0)
>
> +/* ANALOGIX_DP_PKT_SEND_CTL */
> +#define IF_UP (0x1 << 4)
> +#define IF_EN (0x1 << 0)
> +
> +/* ANALOGIX_DP_CRC_CON */
> +#define PSR_VID_CRC_FLUSH (0x1 << 2)
> +#define PSR_VID_CRC_ENABLE (0x1 << 0)
> +
> #endif /* _ANALOGIX_DP_REG_H */
> diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
> index 9ef89de..dd38527 100644
> --- a/include/drm/bridge/analogix_dp.h
> +++ b/include/drm/bridge/analogix_dp.h
> @@ -41,6 +41,9 @@ struct analogix_dp_plat_data {
> struct drm_display_mode *);
> };
>
> +int analogix_dp_actice_psr(struct device *dev);
> +int analogix_dp_inactice_psr(struct device *dev);
> +
> int analogix_dp_resume(struct device *dev);
> int analogix_dp_suspend(struct device *dev);
>
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