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Date: Thu, 13 Nov 2014 13:09:14 +0000
From: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>
To: Andy Yan <andy.yan@...k-chips.com>, <airlied@...ux.ie>,
<heiko@...ech.de>, <fabio.estevam@...escale.com>,
<rmk+kernel@....linux.org.uk>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Grant Likely <grant.likely@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Shawn Guo <shawn.guo@...aro.org>,
Josh Boyer <jwboyer@...hat.com>,
Sean Paul <seanpaul@...omium.org>,
Inki Dae <inki.dae@...sung.com>,
Dave Airlie <airlied@...hat.com>,
Arnd Bergmann <arnd@...db.de>,
Lucas Stach <l.stach@...gutronix.de>, <djkurtz@...gle.com>,
<ykk@...k-chips.com>, <linux-kernel@...r.kernel.org>,
<dri-devel@...ts.freedesktop.org>, <devel@...verdev.osuosl.org>,
<devicetree@...r.kernel.org>, <linux-rockchip@...ts.infradead.org>,
<jay.xu@...k-chips.com>, Pawel Moll <pawel.moll@....com>,
<mark.yao@...k-chips.com>, Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH v9 9/9] drm: bridge/dw_hdmi: add rockchip rk3288 support
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@...k-chips.com>
> Signed-off-by: Yakir Yang <ykk@...k-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
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