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Mon, 22 Feb 2021 07:20:34 +0000 (GMT) Message-ID: Date: Mon, 22 Feb 2021 08:20:33 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:86.0) Gecko/20100101 Thunderbird/86.0 Subject: Re: [PATCH] drm/dsi: Add _NO_ to MIPI_DSI_* flags disabling features Content-Language: en-GB To: Nicolas Boichat , Laurent Pinchart Cc: Neil Armstrong , David Airlie , Viresh Kumar , dri-devel , Thierry Reding , Sam Ravnborg , Emil Velikov , linux-samsung-soc@vger.kernel.org, Joonyoung Shim , Krzysztof Kozlowski , Chun-Kuang Hu , Jonas Karlman , linux-arm-msm@vger.kernel.org, "moderated list:ARM/Mediatek SoC support" , Rikard Falkeborn , Matthias Brugger , Sean Paul , Xin Ji , linux-arm Mailing List , Jernej Skrabec , Rajendra Nayak , Thomas Zimmermann , Seung-Woo Kim , lkml , Robert Foss , Kyungmin Park , freedreno@lists.freedesktop.org From: Andrzej Hajda In-Reply-To: Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA02Se0xTVxzHOffe3pZuhUvBcIIzBrLhI1t9YPDErSBxhuseipvZMshCq960 RKimhenMCARwg44ijwWkBZwLZV1FV8tjtI7iwK3U8ZRCYFpxzk1k5TFaRBzKWloz/vv8Ht/f 7/c9ORycbyEjOGmyTEYuE6dHkVyi9ZfFvtf2pcSIttoruEjVZ8PQNyoVgezzMyS6aNcR6E/l FIlqHvQCNLzwEEc25zCBJu4MEqi/38BGvXlONioqq2cj4x8jLFTW0ctGQ+YaEg3lDwJ0rt+C obyCGNRZkoL+siWgBnsTC82pf8eRbrEFIEfFdU9TxUMSLZrrCNTsLGOhK/M0qnM8xnevo2vb zTg9M3qGTWtyBwl6qESF0W2OekCb1A5PrrCaRRv1RSTdXXoTo2+P/EjSPzy6y6LHv7RidFN9 Dm01/8am6yuHSbqkWQ+SQpO5bxxl0tM+YeRb4kRc6eJCHXbi8tZThq8GQC6ojlaCQA6kdsDy wmLcy3xKB+DsaLIScD3sBvDxrIXtC1wAFqhvsZ8rlA+MLF/hWwDv6FSEL5gBcLqrxdPF4fCo OFitlXsFBPUKnDEOkl7mUSHQVn2f8PIaSgQNRU2Yl0OpA/BC+cTKApwKh3nu71heDqOOwPyz 13DvfJxycWB+1/SKgKQ2wadNYytDA6mDsHiy0i9eD/NbNCsCSPVyocXlZPnOfhPaB+75ORRO Wpv9dl6Cy6bzmI9z4LiuwC8uBLDFYMJ9hdfh7b4npNcZ7tn8vXmLL50AtZqJlTSkguDoVIjv hiBY3lqF+9I8WPg539cdCcd7W/wDw6F2YJ4sBVHqVc+iXmVfvcqN+v+9XwNCD8KZLEWGhFFs kzEnBQpxhiJLJhEcOZ5hBJ4v/usz61wbqJ38R9AJMA7oBJCDR4XxSMd2EZ93VPzpaUZ+PFWe lc4oOsFaDhEVztNrGlP5lEScyRxjmBOM/HkV4wRG5GKRMXw3dNULF/TuxnlVd0CPXL973+zV EFlV8JoPaxKTzlyPz67Tvhpr2DuSXXk2MUzXxBz+IGggdv3s1UT3Lnf8Yaxq7bWSn/aw+i6H nTNVjBZrW40Rm7P3a7TNtaykhhuWrjhKFPDiwer56LcM2gTnR2M5b3cdijb+fbpDyde8N+Xa 1CYXuNWXphWpwrs98N7Jgqfx9vPMz4EBkkOD0Z1fSF/4N3xJ2pHcsLPnys6x7UNTz54El166 8LHDIFg+ttcpTNv4vt52yhoseTfy5qPa7rkDG9qdOeti31l++b56Wpi51Lhj7mKFVL0MlvZs uLHRZPiM3TaZcksId+3PKG2vbFBFEQqpeNtmXK4Q/weC/CESUQQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrIKsWRmVeSWpSXmKPExsVy+t/xe7oe0cYJBr2bZS16z51ksljU28ti ceXrezaL1VdWsFg87XrLZjHn+VlGi6vfXzJbnHxzlcXixb2LLBbnz29gtzjb9IbdonPiEnaL TY+vsVpM3H+W3eLyrjlsFpebLzJazDi/j8miqcXY4lBftMWzk44Wy65sZrX4NOshs8WKn1sZ Le5OPgJUNPklm8XPXfNYLLa8mchqsfGrh8W8uz+YHWQ95u7dxezx/kYru8fshossHpf7epk8 dtxdwuixc9ZdoFjHTFaPTas62TxOTLjE5HHn2h42j+3fHrB63O8+zuSxeUm9x/Fdt9g9lky7 yubRt2UVY4BwlJ5NUX5pSapCRn5xia1StKGFkZ6hpYWekYmlnqGxeayVkamSvp1NSmpOZllq kb5dgl7Gz+/zmArWGVRsmHKBsYFxploXIyeHhICJRNfzTaxdjFwcQgJLGSWavncxQiTEJXbP f8sMYQtL/LnWxQZR9JZRov1RD1MXIwcHr4CdxMylRSA1LAKqEu83XWQDsXkFBCVOznzCAmKL CiRITO5/DRYXFvCVuPZgDZjNDDS/6ctKVhBbRCBZ4vypmUwg85kF/nJIfFt6F+wIIYE5TBJP 74EVsQloSvzdfBOsmVMgUKLn1TR2iEFmEl1bIY5mFpCXaN46m3kCo9AsJHfMQrJvFpKWWUha FjCyrGIUSS0tzk3PLTbUK07MLS7NS9dLzs/dxAhMW9uO/dy8g3Heq496hxiZOBgPMUpwMCuJ 8LLdNUoQ4k1JrKxKLcqPLyrNSS0+xGgKDIyJzFKiyfnAxJlXEm9oZmBqaGJmaWBqaWasJM67 de6aeCGB9MSS1OzU1ILUIpg+Jg5OqQYmyyuyOrcYxbvvKyh3FUiExybITNlSW3dK8cgJ10eH +pXKFG587Mn9xbAnb6+Rsu5Vs96P2w5dffBT0fb4uzfxdV+bT+3zDHsY7tdbtYJv/YVvvHPD v0tJbk1esGtp94z4i8tPhzhM+Pt5h2L6+eZcvXt9wo1b9XTqP23m8t+9p8lfa5fZ5fDoZFm3 z3Mygx/dStD8wGYQ0Xbdd1JaZPJ3X8WsGwrqv20Djnls7WnZFHDph/z+C+/PvQlLMum/cKXv j0SjoN2306keolYrreX0SxJ/tWsHPFi1kffTAdbakvRzfTVJRyN/nRAX6H8eZb96i9sF2bcv Hy/Uer52+54Nvm3vWuO+T6vRtqj58ZlViaU4I9FQi7moOBEA0rROW+QDAAA= X-CMS-MailID: 20210222072040eucas1p1bb0bb4ba140d3b7029bfd89ab9efef6b X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20210222053139eucas1p2661f94e218ae4c553e031ffa2e7b0cb3 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20210222053139eucas1p2661f94e218ae4c553e031ffa2e7b0cb3 References: <20210211113309.1.I629b2366a6591410359c7fcf6d385b474b705ca2@changeid> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Hi Nicolas, W dniu 22.02.2021 o 06:31, Nicolas Boichat pisze: > On Mon, Feb 22, 2021 at 3:08 AM Laurent Pinchart > wrote: >> Hi Nicolas, >> >> Thank you for the patch. >> >> On Thu, Feb 11, 2021 at 11:33:55AM +0800, Nicolas Boichat wrote: >>> Many of the DSI flags have names opposite to their actual effects, >>> e.g. MIPI_DSI_MODE_EOT_PACKET means that EoT packets will actually >>> be disabled. Fix this by including _NO_ in the flag names, e.g. >>> MIPI_DSI_MODE_NO_EOT_PACKET. >>> >>> Signed-off-by: Nicolas Boichat >> This looks good to me, it increases readability. >> >> Reviewed-by: Laurent Pinchart >> >> Please however see the end of the mail for a comment. Reviewed-by: Andrzej Hajda And comment at the end. >> >>> --- >>> I considered adding _DISABLE_ instead, but that'd make the >>> flag names a big too long. >>> >>> Generated with: >>> flag=MIPI_DSI_MODE_VIDEO_HFP; git grep $flag | cut -f1 -d':' | \ >>> xargs -I{} sed -i -e "s/$flag/MIPI_DSI_MODE_VIDEO_NO_HFP/" {} >>> flag=MIPI_DSI_MODE_VIDEO_HBP; git grep $flag | cut -f1 -d':' | \ >>> xargs -I{} sed -i -e "s/$flag/MIPI_DSI_MODE_VIDEO_NO_HBP/" {} >>> flag=MIPI_DSI_MODE_VIDEO_HSA; git grep $flag | cut -f1 -d':' | \ >>> xargs -I{} sed -i -e "s/$flag/MIPI_DSI_MODE_VIDEO_NO_HSA/" {} >>> flag=MIPI_DSI_MODE_EOT_PACKET; git grep $flag | cut -f1 -d':' | \ >>> xargs -I{} sed -i -e "s/$flag/MIPI_DSI_MODE_NO_EOT_PACKET/" {} >>> (then minor format changes) >> Ever tried coccinelle ? :-) > Fun project for next time ,-) > >>> drivers/gpu/drm/bridge/adv7511/adv7533.c | 2 +- >>> drivers/gpu/drm/bridge/analogix/anx7625.c | 2 +- >>> drivers/gpu/drm/bridge/cdns-dsi.c | 4 ++-- >>> drivers/gpu/drm/bridge/tc358768.c | 2 +- >>> drivers/gpu/drm/exynos/exynos_drm_dsi.c | 8 ++++---- >>> drivers/gpu/drm/mcde/mcde_dsi.c | 2 +- >>> drivers/gpu/drm/mediatek/mtk_dsi.c | 2 +- >>> drivers/gpu/drm/msm/dsi/dsi_host.c | 8 ++++---- >>> drivers/gpu/drm/panel/panel-asus-z00t-tm5p5-n35596.c | 2 +- >>> drivers/gpu/drm/panel/panel-dsi-cm.c | 2 +- >>> drivers/gpu/drm/panel/panel-elida-kd35t133.c | 2 +- >>> drivers/gpu/drm/panel/panel-khadas-ts050.c | 2 +- >>> drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c | 2 +- >>> drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c | 2 +- >>> drivers/gpu/drm/panel/panel-novatek-nt35510.c | 2 +- >>> drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c | 2 +- >>> drivers/gpu/drm/panel/panel-samsung-s6d16d0.c | 2 +- >>> drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c | 2 +- >>> drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c | 2 +- >>> drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c | 4 ++-- >>> drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 2 +- >>> drivers/gpu/drm/panel/panel-simple.c | 2 +- >>> drivers/gpu/drm/panel/panel-sony-acx424akp.c | 2 +- >>> drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c | 2 +- >>> include/drm/drm_mipi_dsi.h | 8 ++++---- >>> 25 files changed, 36 insertions(+), 36 deletions(-) >>> >>> [] >>> diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h >>> index 360e6377e84b..ba91cf22af51 100644 >>> --- a/include/drm/drm_mipi_dsi.h >>> +++ b/include/drm/drm_mipi_dsi.h >>> @@ -119,15 +119,15 @@ struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node); >>> /* enable hsync-end packets in vsync-pulse and v-porch area */ >>> #define MIPI_DSI_MODE_VIDEO_HSE BIT(4) >> We're mixing bits that enable a feature and bits that disable a feature. >> Are these bits defined in the DSI spec, or internal to DRM ? In the >> latter case, would it make sense to standardize on one "polarity" ? That >> would be a more intrusive change in drivers though. > Yes, that'd require auditing every single code path and reverse the > logic as needed. I'm not volunteering for that ,-P (hopefully the > current change is still an improvement). > > Hopefully real DSI experts can comment (Andrzej?), I think the default > are sensible settings? Hehe, "real DSI expert" :), ok I've read spec few times :) If I remember correctly the spec did not prioritizes these modes, specs are publicly available if somebody want to check it feel free. These values were taken from defaults for Exynos DSI, as nobody at the time has better idea. We could try to optimize it by looking for example in different dsi hosts defaults, or maybe dsi devices, but I am not sure if it is worth time. This solution is good for me. Regards Andrzej > > >>> /* disable hfront-porch area */ >>> -#define MIPI_DSI_MODE_VIDEO_HFP BIT(5) >>> +#define MIPI_DSI_MODE_VIDEO_NO_HFP BIT(5) >>> /* disable hback-porch area */ >>> -#define MIPI_DSI_MODE_VIDEO_HBP BIT(6) >>> +#define MIPI_DSI_MODE_VIDEO_NO_HBP BIT(6) >>> /* disable hsync-active area */ >>> -#define MIPI_DSI_MODE_VIDEO_HSA BIT(7) >>> +#define MIPI_DSI_MODE_VIDEO_NO_HSA BIT(7) >>> /* flush display FIFO on vsync pulse */ >>> #define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8) >>> /* disable EoT packets in HS mode */ >>> -#define MIPI_DSI_MODE_EOT_PACKET BIT(9) >>> +#define MIPI_DSI_MODE_NO_EOT_PACKET BIT(9) >>> /* device supports non-continuous clock behavior (DSI spec 5.6.1) */ >>> #define MIPI_DSI_CLOCK_NON_CONTINUOUS BIT(10) >>> /* transmit data in low power */ >> -- >> Regards, >> >> Laurent Pinchart > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > 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Thunderbird/86.0 Subject: Re: [PATCH] drm/dsi: Add _NO_ to MIPI_DSI_* flags disabling features Content-Language: en-GB To: Nicolas Boichat , Laurent Pinchart From: Andrzej Hajda In-Reply-To: X-Brightmail-Tracker: H4sIAAAAAAAAA02Se0xTVxzHOffe3pZuhUvBcIIzBrLhI1t9YPDErSBxhuseipvZMshCq960 RKimhenMCARwg44ijwWkBZwLZV1FV8tjtI7iwK3U8ZRCYFpxzk1k5TFaRBzKWloz/vv8Ht/f 7/c9ORycbyEjOGmyTEYuE6dHkVyi9ZfFvtf2pcSIttoruEjVZ8PQNyoVgezzMyS6aNcR6E/l FIlqHvQCNLzwEEc25zCBJu4MEqi/38BGvXlONioqq2cj4x8jLFTW0ctGQ+YaEg3lDwJ0rt+C obyCGNRZkoL+siWgBnsTC82pf8eRbrEFIEfFdU9TxUMSLZrrCNTsLGOhK/M0qnM8xnevo2vb zTg9M3qGTWtyBwl6qESF0W2OekCb1A5PrrCaRRv1RSTdXXoTo2+P/EjSPzy6y6LHv7RidFN9 Dm01/8am6yuHSbqkWQ+SQpO5bxxl0tM+YeRb4kRc6eJCHXbi8tZThq8GQC6ojlaCQA6kdsDy wmLcy3xKB+DsaLIScD3sBvDxrIXtC1wAFqhvsZ8rlA+MLF/hWwDv6FSEL5gBcLqrxdPF4fCo OFitlXsFBPUKnDEOkl7mUSHQVn2f8PIaSgQNRU2Yl0OpA/BC+cTKApwKh3nu71heDqOOwPyz 13DvfJxycWB+1/SKgKQ2wadNYytDA6mDsHiy0i9eD/NbNCsCSPVyocXlZPnOfhPaB+75ORRO 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20210222053139eucas1p2661f94e218ae4c553e031ffa2e7b0cb3 References: <20210211113309.1.I629b2366a6591410359c7fcf6d385b474b705ca2@changeid> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210222_022107_925213_2CADD802 X-CRM114-Status: GOOD ( 25.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Neil Armstrong , David Airlie , Viresh Kumar , dri-devel , Thierry Reding , Sam Ravnborg , Emil Velikov , linux-samsung-soc@vger.kernel.org, Joonyoung Shim , Krzysztof Kozlowski , Chun-Kuang Hu , Jonas Karlman , linux-arm-msm@vger.kernel.org, Rikard Falkeborn , "moderated list:ARM/Mediatek SoC support" , Matthias Brugger , Sean Paul , Xin Ji , linux-arm Mailing List , Jernej Skrabec , Rajendra Nayak , Seung-Woo Kim , lkml , Robert Foss , Kyungmin Park , Thomas Zimmermann , freedreno@lists.freedesktop.org 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