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[90.63.244.31]) by smtp.gmail.com with ESMTPSA id f207sm4076247wme.9.2020.02.07.07.36.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 07 Feb 2020 07:36:02 -0800 (PST) Subject: Re: [PATCH v4 07/11] drm/meson: meson_dw_hdmi: add bridge and switch to drm_bridge_funcs To: Boris Brezillon Cc: a.hajda@samsung.com, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@siol.net, linux-amlogic@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20200206191834.6125-1-narmstrong@baylibre.com> <20200206191834.6125-8-narmstrong@baylibre.com> <20200207155743.24ee9bf0@collabora.com> From: Neil Armstrong Autocrypt: addr=narmstrong@baylibre.com; prefer-encrypt=mutual; keydata= xsBNBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAHNKE5laWwgQXJtc3Ryb25nIDxuYXJtc3Ryb25nQGJheWxpYnJlLmNvbT7CwHsEEwEKACUC GyMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheABQJXDO2CAhkBAAoJEBaat7Gkz/iubGIH/iyk RqvgB62oKOFlgOTYCMkYpm2aAOZZLf6VKHKc7DoVwuUkjHfIRXdslbrxi4pk5VKU6ZP9AKsN NtMZntB8WrBTtkAZfZbTF7850uwd3eU5cN/7N1Q6g0JQihE7w4GlIkEpQ8vwSg5W7hkx3yQ6 2YzrUZh/b7QThXbNZ7xOeSEms014QXazx8+txR7jrGF3dYxBsCkotO/8DNtZ1R+aUvRfpKg5 ZgABTC0LmAQnuUUf2PHcKFAHZo5KrdO+tyfL+LgTUXIXkK+tenkLsAJ0cagz1EZ5gntuheLD YJuzS4zN+1Asmb9kVKxhjSQOcIh6g2tw7vaYJgL/OzJtZi6JlIXOwU0EVid/pAEQAND7AFhr 5faf/EhDP9FSgYd/zgmb7JOpFPje3uw7jz9wFb28Cf0Y3CcncdElYoBNbRlesKvjQRL8mozV 9RN+IUMHdUx1akR/A4BPXNdL7StfzKWOCxZHVS+rIQ/fE3Qz/jRmT6t2ZkpplLxVBpdu95qJ YwSZjuwFXdC+A7MHtQXYi3UfCgKiflj4+/ITcKC6EF32KrmIRqamQwiRsDcUUKlAUjkCLcHL CQvNsDdm2cxdHxC32AVm3Je8VCsH7/qEPMQ+cEZk47HOR3+Ihfn1LEG5LfwsyWE8/JxsU2a1 q44LQM2lcK/0AKAL20XDd7ERH/FCBKkNVzi+svYJpyvCZCnWT0TRb72mT+XxLWNwfHTeGALE +1As4jIS72IglvbtONxc2OIid3tR5rX3k2V0iud0P7Hnz/JTdfvSpVj55ZurOl2XAXUpGbq5 XRk5CESFuLQV8oqCxgWAEgFyEapI4GwJsvfl/2Er8kLoucYO1Id4mz6N33+omPhaoXfHyLSy dxD+CzNJqN2GdavGtobdvv/2V0wukqj86iKF8toLG2/Fia3DxMaGUxqI7GMOuiGZjXPt/et/ qeOySghdQ7Sdpu6fWc8CJXV2mOV6DrSzc6ZVB4SmvdoruBHWWOR6YnMz01ShFE49pPucyU1h Av4jC62El3pdCrDOnWNFMYbbon3vABEBAAHCwn4EGAECAAkFAlYnf6QCGwICKQkQFpq3saTP +K7BXSAEGQECAAYFAlYnf6QACgkQd9zb2sjISdGToxAAkOjSfGxp0ulgHboUAtmxaU3viucV e2Hl1BVDtKSKmbIVZmEUvx9D06IijFaEzqtKD34LXD6fjl4HIyDZvwfeaZCbJbO10j3k7FJE QrBtpdVqkJxme/nYlGOVzcOiKIepNkwvnHVnuVDVPcXyj2wqtsU7VZDDX41z3X4xTQwY3SO1 9nRO+f+i4RmtJcITgregMa2PcB0LvrjJlWroI+KAKCzoTHzSTpCXMJ1U/dEqyc87bFBdc+DI k8mWkPxsccdbs4t+hH0NoE3Kal9xtAl56RCtO/KgBLAQ5M8oToJVatxAjO1SnRYVN1EaAwrR xkHdd97qw6nbg9BMcAoa2NMc0/9MeiaQfbgW6b0reIz/haHhXZ6oYSCl15Knkr4t1o3I2Bqr Mw623gdiTzotgtId8VfLB2Vsatj35OqIn5lVbi2ua6I0gkI6S7xJhqeyrfhDNgzTHdQVHB9/ 7jnM0ERXNy1Ket6aDWZWCvM59dTyu37g3VvYzGis8XzrX1oLBU/tTXqo1IFqqIAmvh7lI0Se gCrXz7UanxCwUbQBFjzGn6pooEHJYRLuVGLdBuoApl/I4dLqCZij2AGa4CFzrn9W0cwm3HCO lR43gFyz0dSkMwNUd195FrvfAz7Bjmmi19DnORKnQmlvGe/9xEEfr5zjey1N9+mt3//geDP6 clwKBkq0JggA+RTEAELzkgPYKJ3NutoStUAKZGiLOFMpHY6KpItbbHjF2ZKIU1whaRYkHpB2 uLQXOzZ0d7x60PUdhqG3VmFnzXSztA4vsnDKk7x2xw0pMSTKhMafpxaPQJf494/jGnwBHyi3 h3QGG1RjfhQ/OMTX/HKtAUB2ct3Q8/jBfF0hS5GzT6dYtj0Ci7+8LUsB2VoayhNXMnaBfh+Q pAhaFfRZWTjUFIV4MpDdFDame7PB50s73gF/pfQbjw5Wxtes/0FnqydfId95s+eej+17ldGp lMv1ok7K0H/WJSdr7UwDAHEYU++p4RRTJP6DHWXcByVlpNQ4SSAiivmWiwOt490+Ac7ATQRN WQbPAQgAvIoM384ZRFocFXPCOBir5m2J+96R2tI2XxMgMfyDXGJwFilBNs+fpttJlt2995A8 0JwPj8SFdm6FBcxygmxBBCc7i/BVQuY8aC0Z/w9Vzt3Eo561r6pSHr5JGHe8hwBQUcNPd/9l 2ynP57YTSE9XaGJK8gIuTXWo7pzIkTXfN40Wh5jeCCspj4jNsWiYhljjIbrEj300g8RUT2U0 FcEoiV7AjJWWQ5pi8lZJX6nmB0lc69Jw03V6mblgeZ/1oTZmOepkagwy2zLDXxihf0GowUif GphBDeP8elWBNK+ajl5rmpAMNRoKxpN/xR4NzBg62AjyIvigdywa1RehSTfccQARAQABwsBf BBgBAgAJBQJNWQbPAhsMAAoJEBaat7Gkz/iuteIH+wZuRDqK0ysAh+czshtG6JJlLW6eXJJR Vi7dIPpgFic2LcbkSlvB8E25Pcfz/+tW+04Urg4PxxFiTFdFCZO+prfd4Mge7/OvUcwoSub7 ZIPo8726ZF5/xXzajahoIu9/hZ4iywWPAHRvprXaim5E/vKjcTeBMJIqZtS4u/UK3EpAX59R XVxVpM8zJPbk535ELUr6I5HQXnihQm8l6rt9TNuf8p2WEDxc8bPAZHLjNyw9a/CdeB97m2Tr zR8QplXA5kogS4kLe/7/JmlDMO8Zgm9vKLHSUeesLOrjdZ59EcjldNNBszRZQgEhwaarfz46 BSwxi7g3Mu7u5kUByanqHyA= Organization: Baylibre Message-ID: Date: Fri, 7 Feb 2020 16:36:01 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20200207155743.24ee9bf0@collabora.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/02/2020 15:57, Boris Brezillon wrote: > On Thu, 6 Feb 2020 20:18:30 +0100 > Neil Armstrong wrote: > >> Switch the dw-hdmi driver to drm_bridge_funcs by implementing a new local >> bridge, connecting it to the dw-hdmi bridge, then implement the >> atomic_get_input_bus_fmts/atomic_get_output_bus_fmts. >> >> Signed-off-by: Neil Armstrong >> --- >> drivers/gpu/drm/meson/meson_dw_hdmi.c | 105 +++++++++++++++++++++----- >> 1 file changed, 85 insertions(+), 20 deletions(-) >> >> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c >> index 3bb7ffe5fc39..4b3809626f7e 100644 >> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c >> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c >> @@ -16,6 +16,7 @@ >> >> #include >> #include >> +#include >> #include >> #include >> #include >> @@ -135,6 +136,7 @@ struct meson_dw_hdmi_data { >> >> struct meson_dw_hdmi { >> struct drm_encoder encoder; >> + struct drm_bridge bridge; >> struct dw_hdmi_plat_data dw_plat_data; >> struct meson_drm *priv; >> struct device *dev; >> @@ -151,6 +153,8 @@ struct meson_dw_hdmi { >> }; >> #define encoder_to_meson_dw_hdmi(x) \ >> container_of(x, struct meson_dw_hdmi, encoder) >> +#define bridge_to_meson_dw_hdmi(x) \ >> + container_of(x, struct meson_dw_hdmi, bridge) >> >> static inline int dw_hdmi_is_compatible(struct meson_dw_hdmi *dw_hdmi, >> const char *compat) >> @@ -368,7 +372,7 @@ static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi) >> } >> >> static void dw_hdmi_set_vclk(struct meson_dw_hdmi *dw_hdmi, >> - struct drm_display_mode *mode) >> + const struct drm_display_mode *mode) >> { >> struct meson_drm *priv = dw_hdmi->priv; >> int vic = drm_match_cea_mode(mode); >> @@ -663,6 +667,10 @@ dw_hdmi_mode_valid(struct drm_connector *connector, >> >> /* Encoder */ >> >> +static const u32 meson_dw_hdmi_out_bus_fmts[] = { >> + MEDIA_BUS_FMT_YUV8_1X24, >> +}; >> + >> static void meson_venc_hdmi_encoder_destroy(struct drm_encoder *encoder) >> { >> drm_encoder_cleanup(encoder); >> @@ -672,16 +680,63 @@ static const struct drm_encoder_funcs meson_venc_hdmi_encoder_funcs = { >> .destroy = meson_venc_hdmi_encoder_destroy, >> }; >> >> -static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder, >> +static u32 * >> +meson_venc_hdmi_encoder_get_out_bus_fmts(struct drm_bridge *bridge, >> + struct drm_bridge_state *bridge_state, >> + struct drm_crtc_state *crtc_state, >> + struct drm_connector_state *conn_state, >> + unsigned int *num_output_fmts) >> +{ >> + u32 *output_fmts; >> + >> + *num_output_fmts = ARRAY_SIZE(meson_dw_hdmi_out_bus_fmts); >> + output_fmts = kcalloc(*num_output_fmts, sizeof(*output_fmts), >> + GFP_KERNEL); >> + if (!output_fmts) >> + return NULL; >> + >> + memcpy(output_fmts, meson_dw_hdmi_out_bus_fmts, *num_output_fmts); >> + >> + return output_fmts; >> +} >> + >> +static u32 * >> +meson_venc_hdmi_encoder_get_inp_bus_fmts(struct drm_bridge *bridge, >> + struct drm_bridge_state *bridge_state, >> + struct drm_crtc_state *crtc_state, >> + struct drm_connector_state *conn_state, >> + u32 output_fmt, >> + unsigned int *num_input_fmts) >> +{ >> + u32 *input_fmts = NULL; >> + >> + if (output_fmt == meson_dw_hdmi_out_bus_fmts[0]) { >> + *num_input_fmts = 1; >> + input_fmts = kcalloc(*num_input_fmts, >> + sizeof(*input_fmts), >> + GFP_KERNEL); >> + if (!input_fmts) >> + return NULL; >> + >> + input_fmts[0] = output_fmt; >> + } else { >> + *num_input_fmts = 0; >> + } >> + >> + return input_fmts; >> +} >> + >> +static int meson_venc_hdmi_encoder_atomic_check(struct drm_bridge *bridge, >> + struct drm_bridge_state *bridge_state, >> struct drm_crtc_state *crtc_state, >> struct drm_connector_state *conn_state) >> { >> return 0; >> } >> >> -static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder) >> +static void meson_venc_hdmi_encoder_disable(struct drm_bridge *bridge) >> { >> - struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder); >> + struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge); >> struct meson_drm *priv = dw_hdmi->priv; >> >> DRM_DEBUG_DRIVER("\n"); >> @@ -693,9 +748,9 @@ static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder) >> writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN)); >> } >> >> -static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder) >> +static void meson_venc_hdmi_encoder_enable(struct drm_bridge *bridge) >> { >> - struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder); >> + struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge); >> struct meson_drm *priv = dw_hdmi->priv; >> >> DRM_DEBUG_DRIVER("%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP"); >> @@ -706,11 +761,11 @@ static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder) >> writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN)); >> } >> >> -static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder, >> - struct drm_display_mode *mode, >> - struct drm_display_mode *adjusted_mode) >> +static void meson_venc_hdmi_encoder_mode_set(struct drm_bridge *bridge, >> + const struct drm_display_mode *mode, >> + const struct drm_display_mode *adjusted_mode) >> { >> - struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder); >> + struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge); >> struct meson_drm *priv = dw_hdmi->priv; >> int vic = drm_match_cea_mode(mode); >> >> @@ -726,12 +781,16 @@ static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder, >> writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL)); >> } >> >> -static const struct drm_encoder_helper_funcs >> - meson_venc_hdmi_encoder_helper_funcs = { >> - .atomic_check = meson_venc_hdmi_encoder_atomic_check, >> - .disable = meson_venc_hdmi_encoder_disable, >> - .enable = meson_venc_hdmi_encoder_enable, >> - .mode_set = meson_venc_hdmi_encoder_mode_set, >> +static const struct drm_bridge_funcs meson_venc_hdmi_encoder_bridge_funcs = { >> + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, >> + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, >> + .atomic_get_output_bus_fmts = meson_venc_hdmi_encoder_get_out_bus_fmts, > > Hm, can this bridge element be connected directly to the HDMI connector > without the dw-hdmi bridge in the middle? If that's not the case, then > you probably don't have to implement ->atomic_get_output_bus_fmts() > (only used on the last bridge element). No, the HDMI bridge is mandatory here. Ok, makes sense, I'll remove it then. Neil > >> + .atomic_get_input_bus_fmts = meson_venc_hdmi_encoder_get_inp_bus_fmts, >> + .atomic_reset = drm_atomic_helper_bridge_reset, >> + .atomic_check = meson_venc_hdmi_encoder_atomic_check, >> + .enable = meson_venc_hdmi_encoder_enable, >> + .disable = meson_venc_hdmi_encoder_disable, >> + .mode_set = meson_venc_hdmi_encoder_mode_set, >> }; >> >> /* DW HDMI Regmap */ >> @@ -852,6 +911,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, >> struct drm_device *drm = data; >> struct meson_drm *priv = drm->dev_private; >> struct dw_hdmi_plat_data *dw_plat_data; >> + struct drm_bridge *next_bridge; >> struct drm_encoder *encoder; >> struct resource *res; >> int irq; >> @@ -953,8 +1013,6 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, >> >> /* Encoder */ >> >> - drm_encoder_helper_add(encoder, &meson_venc_hdmi_encoder_helper_funcs); >> - >> ret = drm_encoder_init(drm, encoder, &meson_venc_hdmi_encoder_funcs, >> DRM_MODE_ENCODER_TMDS, "meson_hdmi"); >> if (ret) { >> @@ -962,6 +1020,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, >> return ret; >> } >> >> + meson_dw_hdmi->bridge.funcs = &meson_venc_hdmi_encoder_bridge_funcs; >> + drm_bridge_attach(encoder, &meson_dw_hdmi->bridge, NULL); >> + >> encoder->possible_crtcs = BIT(0); >> >> DRM_DEBUG_DRIVER("encoder initialized\n"); >> @@ -984,11 +1045,15 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master, >> >> platform_set_drvdata(pdev, meson_dw_hdmi); >> >> - meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder, >> - &meson_dw_hdmi->dw_plat_data); >> + meson_dw_hdmi->hdmi = dw_hdmi_probe(pdev, >> + &meson_dw_hdmi->dw_plat_data); >> if (IS_ERR(meson_dw_hdmi->hdmi)) >> return PTR_ERR(meson_dw_hdmi->hdmi); >> >> + next_bridge = of_drm_find_bridge(pdev->dev.of_node); >> + if (next_bridge) >> + drm_bridge_attach(encoder, next_bridge, &meson_dw_hdmi->bridge); >> + >> DRM_DEBUG_DRIVER("HDMI controller initialized\n"); >> >> return 0; >