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[86.58.6.171]) by smtp.gmail.com with ESMTPSA id r17-20020ac25a51000000b00512bfc0c2b9sm1189234lfn.178.2024.02.22.11.12.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Feb 2024 11:12:31 -0800 (PST) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter , Jonathan Corbet , Sandy Huang , Heiko =?ISO-8859-1?Q?St=FCbner?= , Chen-Yu Tsai , Samuel Holland , Maxime Ripard Cc: Hans Verkuil , Sebastian Wick , Ville =?ISO-8859-1?Q?Syrj=E4l=E4?= , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-sunxi@lists.linux.dev, Maxime Ripard , Sui Jingfeng Subject: Re: [PATCH v7 35/36] drm/sun4i: hdmi: Consolidate atomic_check and mode_valid Date: Thu, 22 Feb 2024 20:12:29 +0100 Message-ID: <2921783.e9J7NaK4W3@jernej-laptop> In-Reply-To: <20240222-kms-hdmi-connector-state-v7-35-8f4af575fce2@kernel.org> References: <20240222-kms-hdmi-connector-state-v7-0-8f4af575fce2@kernel.org> <20240222-kms-hdmi-connector-state-v7-35-8f4af575fce2@kernel.org> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Dne =C4=8Detrtek, 22. februar 2024 ob 19:14:21 CET je Maxime Ripard napisal= (a): > atomic_check and mode_valid do not check for the same things which can > lead to surprising result if the userspace commits a mode that didn't go > through mode_valid. Let's merge the two implementations into a function > called by both. >=20 > Acked-by: Sui Jingfeng > Signed-off-by: Maxime Ripard Reviewed-by: Jernej Skrabec Best regards, Jernej > --- > drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 74 +++++++++++++++++++++-------= =2D----- > 1 file changed, 47 insertions(+), 27 deletions(-) >=20 > diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun= 4i/sun4i_hdmi_enc.c > index c276d984da6b..b7cf369b1906 100644 > --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c > +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c > @@ -62,18 +62,6 @@ static int sun4i_hdmi_setup_avi_infoframes(struct sun4= i_hdmi *hdmi, > return 0; > } > =20 > -static int sun4i_hdmi_atomic_check(struct drm_encoder *encoder, > - struct drm_crtc_state *crtc_state, > - struct drm_connector_state *conn_state) > -{ > - struct drm_display_mode *mode =3D &crtc_state->mode; > - > - if (mode->flags & DRM_MODE_FLAG_DBLCLK) > - return -EINVAL; > - > - return 0; > -} > - > static void sun4i_hdmi_disable(struct drm_encoder *encoder, > struct drm_atomic_state *state) > { > @@ -166,31 +154,61 @@ static void sun4i_hdmi_enable(struct drm_encoder *e= ncoder, > writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG); > } > =20 > -static enum drm_mode_status sun4i_hdmi_mode_valid(struct drm_encoder *en= coder, > - const struct drm_display_mode *mode) > +static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs =3D= { > + .atomic_disable =3D sun4i_hdmi_disable, > + .atomic_enable =3D sun4i_hdmi_enable, > +}; > + > +static enum drm_mode_status > +sun4i_hdmi_connector_clock_valid(const struct drm_connector *connector, > + const struct drm_display_mode *mode, > + unsigned long long clock) > { > - struct sun4i_hdmi *hdmi =3D drm_encoder_to_sun4i_hdmi(encoder); > - unsigned long rate =3D mode->clock * 1000; > - unsigned long diff =3D rate / 200; /* +-0.5% allowed by HDMI spec */ > + const struct sun4i_hdmi *hdmi =3D drm_connector_to_sun4i_hdmi(connector= ); > + unsigned long diff =3D clock / 200; /* +-0.5% allowed by HDMI spec */ > long rounded_rate; > =20 > + if (mode->flags & DRM_MODE_FLAG_DBLCLK) > + return MODE_BAD; > + > /* 165 MHz is the typical max pixelclock frequency for HDMI <=3D 1.2 */ > - if (rate > 165000000) > + if (clock > 165000000) > return MODE_CLOCK_HIGH; > - rounded_rate =3D clk_round_rate(hdmi->tmds_clk, rate); > + > + rounded_rate =3D clk_round_rate(hdmi->tmds_clk, clock); > if (rounded_rate > 0 && > - max_t(unsigned long, rounded_rate, rate) - > - min_t(unsigned long, rounded_rate, rate) < diff) > + max_t(unsigned long, rounded_rate, clock) - > + min_t(unsigned long, rounded_rate, clock) < diff) > return MODE_OK; > + > return MODE_NOCLOCK; > } > =20 > -static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs =3D= { > - .atomic_check =3D sun4i_hdmi_atomic_check, > - .atomic_disable =3D sun4i_hdmi_disable, > - .atomic_enable =3D sun4i_hdmi_enable, > - .mode_valid =3D sun4i_hdmi_mode_valid, > -}; > +static int sun4i_hdmi_connector_atomic_check(struct drm_connector *conne= ctor, > + struct drm_atomic_state *state) > +{ > + struct drm_connector_state *conn_state =3D > + drm_atomic_get_new_connector_state(state, connector); > + struct drm_crtc *crtc =3D conn_state->crtc; > + struct drm_crtc_state *crtc_state =3D crtc->state; > + struct drm_display_mode *mode =3D &crtc_state->adjusted_mode; > + enum drm_mode_status status; > + > + status =3D sun4i_hdmi_connector_clock_valid(connector, mode, > + mode->clock * 1000); > + if (status !=3D MODE_OK) > + return -EINVAL; > + > + return 0; > +} > + > +static enum drm_mode_status > +sun4i_hdmi_connector_mode_valid(struct drm_connector *connector, > + struct drm_display_mode *mode) > +{ > + return sun4i_hdmi_connector_clock_valid(connector, mode, > + mode->clock * 1000); > +} > =20 > static int sun4i_hdmi_get_modes(struct drm_connector *connector) > { > @@ -236,6 +254,8 @@ static struct i2c_adapter *sun4i_hdmi_get_ddc(struct = device *dev) > } > =20 > static const struct drm_connector_helper_funcs sun4i_hdmi_connector_help= er_funcs =3D { > + .atomic_check =3D sun4i_hdmi_connector_atomic_check, > + .mode_valid =3D sun4i_hdmi_connector_mode_valid, > .get_modes =3D sun4i_hdmi_get_modes, > }; > =20 >=20 >=20