Re: [PATCH v9 9/9] drm: bridge/dw_hdmi: add rockchip rk3288 support

[Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>]

On 13/11/14 12:57, Andy Yan wrote:
> rk3288 hdmi is compatible with Designware hdmi
> 
> this patch is depend on patch by Mark Yao Add drm
> driver for Rockchip Socs
> 
> see https://lkml.org/lkml/2014/10/8/201
> 
> Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
> Signed-off-by: Yakir Yang <ykk@rock-chips.com>
> 
> ---
> 
> Changes in v9:
> - move some phy configuration to platform driver
> 
> Changes in v8:
> - add support for rockchip rk3288 hdmi
> 
> Changes in v7: None
> Changes in v6: None
> Changes in v5: None
> Changes in v4: None
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/gpu/drm/bridge/dw_hdmi.c            |  45 +++-

This patch looks like it does alot to the dw_hdmi.c as well and not
just adds support for rk3288..

>  drivers/gpu/drm/bridge/dw_hdmi.h            |   3 +-
>  drivers/gpu/drm/rockchip/Kconfig            |  10 +
>  drivers/gpu/drm/rockchip/Makefile           |   2 +-
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 328 ++++++++++++++++++++++++++++
>  drivers/staging/imx-drm/dw_hdmi-imx.c       |   8 +
>  include/drm/bridge/dw_hdmi.h                |   8 +
>  7 files changed, 399 insertions(+), 5 deletions(-)
>  create mode 100644 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> 
> diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
> index ed75147..1dd1f0b 100644
> --- a/drivers/gpu/drm/bridge/dw_hdmi.c
> +++ b/drivers/gpu/drm/bridge/dw_hdmi.c
> @@ -668,11 +668,15 @@ static inline void hdmi_phy_test_dout(struct dw_hdmi *hdmi,
>  
>  static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
>  {
> -	while ((hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
> +	u32 val;
> +
> +	while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
>  		if (msec-- == 0)
>  			return false;
>  		udelay(1000);
>  	}
> +	hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0);
> +
>  	return true;
>  }
>  

Is this a bug fix?

> @@ -711,6 +715,13 @@ static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
>  			 HDMI_PHY_CONF0_ENTMDS_MASK);
>  }
>  
> +static void dw_hdmi_phy_enable_spare(struct dw_hdmi *hdmi, u8 enable)
> +{
> +	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
> +			 HDMI_PHY_CONF0_SPARECTRL_OFFSET,
> +			 HDMI_PHY_CONF0_SPARECTRL_MASK);
> +}
> +
>  static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
>  {
>  	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
> @@ -746,6 +757,7 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
>  	u8 val, msec;
>  	const struct mpll_config *mpll_cfg = hdmi->plat_data->mpll_cfg;
>  	const struct curr_ctrl   *curr_ctr = hdmi->plat_data->cur_ctr;
> +	const struct sym_term *sym_term =  hdmi->plat_data->sym_term;
>  
>  	if (prep)
>  		return -EINVAL;
> @@ -815,10 +827,17 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
>  
>  	hdmi_phy_i2c_write(hdmi, 0x0000, 0x13);  /* PLLPHBYCTRL */
>  	hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
> +
> +	for (i = 0; sym_term[i].mpixelclock != (~0UL); i++)
> +		if (hdmi->hdmi_data.video_mode.mpixelclock <=
> +		    sym_term[i].mpixelclock)
> +			break;
> +
>  	/* RESISTANCE TERM 133Ohm Cfg */
> -	hdmi_phy_i2c_write(hdmi, 0x0005, 0x19);  /* TXTERM */
> +	hdmi_phy_i2c_write(hdmi, sym_term[i].term, 0x19);  /* TXTERM */
>  	/* PREEMP Cgf 0.00 */
> -	hdmi_phy_i2c_write(hdmi, 0x800d, 0x09);  /* CKSYMTXCTRL */
> +	hdmi_phy_i2c_write(hdmi, sym_term[i].sym_ctr, 0x09);  /* CKSYMTXCTRL */
> +

All these seem generic improvements and not rk3288 specific?

>  	/* TX/CK LVL 10 */
>  	hdmi_phy_i2c_write(hdmi, 0x01ad, 0x0E);  /* VLEVCTRL */
>  	/* REMOVE CLK TERM */
> @@ -834,6 +853,9 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
>  	dw_hdmi_phy_gen2_txpwron(hdmi, 1);
>  	dw_hdmi_phy_gen2_pddq(hdmi, 0);
>  
> +	if (hdmi->dev_type == RK3288_HDMI)
> +		dw_hdmi_phy_enable_spare(hdmi, 1);
> +
>  	/*Wait for PHY PLL lock */
>  	msec = 5;
>  	do {
> @@ -1398,6 +1420,20 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  	return 0;
>  }
>  
> +static enum drm_mode_status
> +dw_hdmi_connector_mode_valid(struct drm_connector *connector,
> +			     struct drm_display_mode *mode)
> +{
> +	struct dw_hdmi *hdmi = container_of(connector,
> +					    struct dw_hdmi, connector);
> +	enum drm_mode_status mode_status = MODE_OK;
> +
> +	if (hdmi->plat_data->mode_valid)
> +		mode_status = hdmi->plat_data->mode_valid(connector, mode);
> +
> +	return mode_status;
> +}
> +

This too is disjoint from rk3288 support.

>  static struct drm_encoder *dw_hdmi_connector_best_encoder(struct drm_connector
>  							   *connector)
>  {
> @@ -1422,6 +1458,7 @@ static struct drm_connector_funcs dw_hdmi_connector_funcs = {
>  
>  static struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
>  	.get_modes = dw_hdmi_connector_get_modes,
> +	.mode_valid = dw_hdmi_connector_mode_valid,
>  	.best_encoder = dw_hdmi_connector_best_encoder,
>  };
>  
> @@ -1514,6 +1551,8 @@ static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
>  
>  	drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
>  
> +	drm_connector_register(&hdmi->connector);
> +
>  	return 0;
>  }
>  

...

Please separate generic dw_hdmi.c improvements from the add rk3288 support.

Regards
ZubairLK