kernel/drivers/gpu/drm/stm/ltdc.c, branch linux-4.17.y

drm/stm: ltdc: fix warning in ltdc_crtc_update_clut()

2018-08-03T05:48:01Z

[ Upstream commit c20f5f69c898899027c3e573afaab837195895b6 ] Fix the warning "warn: variable dereferenced before check 'crtc' (see line 390)" by removing unnecessary checks as ltdc_crtc_update_clut() is only called from ltdc_crtc_atomic_flush() where crtc and crtc->state are not NULL. Many thanks to Dan Carpenter for the bug report https://lists.freedesktop.org/archives/dri-devel/2018-February/166918.html Signed-off-by: Philippe Cornu Reported-by: Dan Carpenter Reviewed-by: yannick fertre Link: https://patchwork.freedesktop.org/patch/msgid/20180410135312.3553-1-philippe.cornu@st.com Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

drm/stm: ltdc: remove non-alpha color formats on layer 2 for older hw

2018-02-08T09:23:32Z

Hw older versions support non-alpha color formats derived from native alpha color formats only on the primary layer. For instance, RG16 native format without alpha works fine on 2nd layer but XR24 (derived color format from AR24) does not work on 2nd layer. Signed-off-by: Philippe Cornu Reviewed-by: Yannick Fertré Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/20180201104243.20726-3-philippe.cornu@st.com

drm/stm: ltdc: add non-alpha color formats

2018-02-08T09:23:22Z

ltdc supports natively some color formats with alpha (like ARGB8888, ARGB1555, ARGB4444...). Related non-alpha formats are supported too (ARGB8888->XRGB8888, ARGB4444->XRGB4444...) by adjusting ltdc blending factors. Note: Wayland/Weston requests by default the non-alpha XRGB8888 color format. Signed-off-by: Philippe Cornu Reviewed-by: Yannick Fertré Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/20180201104243.20726-2-philippe.cornu@st.com

drm/stm: ltdc: use crtc_mode_fixup to update adjusted_mode clock

2018-01-29T10:07:16Z

There is a difference between the panel/bridge requested pixel clock value and the real one due to the hw platform clock preciseness (pll, dividers...). This patch updates the adjusted_mode clock value with the real hw clock value so then attached encoder & connector can use it for precise timing computations. Signed-off-by: Philippe Cornu Reviewed-by: Yannick Fertré Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/20180125160101.9102-1-philippe.cornu@st.com

drm/stm: ltdc: add clut mode support

2018-01-09T12:40:51Z

Add the 8-bit clut mode support at crtc level. Useful for low memory footprint user interfaces but also for 8-bit old games (including color shifting visual effects). Tested with fbdev FBIOPUTCMAP & drm DRM_IOCTL_MODE_SETGAMMA ioctls. Signed-off-by: Philippe Cornu Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/1509016666-18927-1-git-send-email-philippe.cornu@st.com

drm/stm: ltdc: Remove unnecessary platform_get_resource() error check

2017-12-19T14:23:45Z

devm_ioremap_resource() already checks if the resource is NULL, so remove the unnecessary platform_get_resource() error check. Cc: Philippe Cornu Signed-off-by: Fabio Estevam Acked-by: Philippe Cornu Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/1513602150-7542-6-git-send-email-festevam@gmail.com

gpu: drm: stm: Adopt SPDX identifiers

2017-12-06T14:51:37Z

Add SPDX identifiers to files under stm directory Signed-off-by: Benjamin Gaignard Acked-by: Vincent Abriou Link: https://patchwork.freedesktop.org/patch/msgid/20171206112947.9569-1-benjamin.gaignard@st.com

drm/stm: ltdc: add a 2nd endpoint

2017-11-07T13:47:39Z

ltdc can have up to 2 endpoints: - dpi external gpios: for rgb panels or external bridge ICs. - dpi internal ios: connected internally to dsi. Note: Refer to the reference manual to know if the dsi is present on your device. Signed-off-by: Philippe Cornu Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/1509018489-19641-3-git-send-email-philippe.cornu@st.com

drm/stm: checkpatch strict minor updates

2017-11-07T13:46:59Z

Minor fixes detected with "scripts/checkpatch.pl --strict" Signed-off-by: Philippe Cornu Reviewed-by: Gustavo Padovan Signed-off-by: Benjamin Gaignard Link: https://patchwork.freedesktop.org/patch/msgid/1509013473-18365-1-git-send-email-philippe.cornu@st.com

drm/stm: ltdc: remove bridge from driver internal structure

2017-10-10T09:32:48Z

With a call to drm_of_panel_bridge_remove() we could remove the bridge without store it in ldtc internal driver structure. Signed-off-by: Benjamin Gaignard Reviewed-by: Philippe Cornu Tested-by: Philippe Cornu Link: https://patchwork.freedesktop.org/patch/msgid/1506936888-23844-4-git-send-email-benjamin.gaignard@linaro.org