kernel/linux.git/drivers/video/fbdev/amba-clcd.c, branch v4.17.1

video: ARM CLCD: Improve a size determination in clcdfb_probe()

2018-03-28T14:34:29+00:00

Replace the specification of a data structure by a pointer dereference as the parameter for the operator "sizeof" to make the corresponding size determination a bit safer according to the Linux coding style convention. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Cc: Russell King Signed-off-by: Bartlomiej Zolnierkiewicz

video: ARM CLCD: Delete an error message for a failed memory allocation in clcdfb_probe()

2018-03-28T14:34:29+00:00

Omit an extra message for a memory allocation failure in this function. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Cc: Russell King Signed-off-by: Bartlomiej Zolnierkiewicz

video: ARM CLCD: constify amba_id

2017-09-04T14:00:49+00:00

amba_id are not supposed to change at runtime. All functions working with const amba_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav Cc: Russell King Signed-off-by: Bartlomiej Zolnierkiewicz

video: ARM CLCD: fix dma allocation size

2017-04-07T15:03:24+00:00

This patch forces the frambuffer size to be aligned on kernel pages. During the board startup, the splash screed did appear; the "ts_test" program or our application were not able to start. The following error message was reported: error: failed to map framebuffer device to memory. LinuxFB: driver cannot connect The issue was discovered, on the LPC32xx platform, during the migration of the LCD definition from the board file to the device tree. Signed-off-by: Liam Beguin Signed-off-by: Sylvain Lemieux Cc: Vladimir Zapolskiy Cc: Russell King Signed-off-by: Bartlomiej Zolnierkiewicz

video: ARM CLCD: use panel device node for getting backlight and mode

2017-01-30T16:39:48+00:00

Having obtained panel device node in clcdfb_of_init_display() it allows to generalize and simplify two more helper functions clcdfb_of_get_backlight() and clcdfb_of_get_mode(). Cc: Tomi Valkeinen Cc: Russell King Cc: Linus Walleij Cc: Arnd Bergmann Signed-off-by: Vladimir Zapolskiy Signed-off-by: Bartlomiej Zolnierkiewicz

video: ARM CLCD: use panel device node for panel initialization

2017-01-30T16:39:48+00:00

There is no necessity to pass an endpoint device node to custom panel initialization functions, because a child panel device node should be sufficient, note that the existing init_panel() callback declaration from linux/amba/clcd.h already prompts to use the panel device node here. Cc: Tomi Valkeinen Cc: Russell King Cc: Linus Walleij Cc: Arnd Bergmann Signed-off-by: Vladimir Zapolskiy Signed-off-by: Bartlomiej Zolnierkiewicz

video: ARM CLCD: sort included headers out alphabetically

2017-01-30T16:39:48+00:00

To simplify the task of looking through the list of included headers sort them out alphabetically, some of the truly redundant headers are removed from the list. Cc: Tomi Valkeinen Cc: Russell King Cc: Linus Walleij Cc: Arnd Bergmann Signed-off-by: Vladimir Zapolskiy Signed-off-by: Bartlomiej Zolnierkiewicz

video: ARM CLCD: fix endpoint lookup logic

2016-08-30T08:31:22+00:00

The addition of the Nomadik support in this driver introduced a bug in clcdfb_of_init_display(), which now calls init_panel with an uninitialized 'endpoint' pointer, as "gcc -Wmaybe-uninitialized" warns: drivers/video/fbdev/amba-clcd.c: In function 'clcdfb_of_init_display': drivers/video/fbdev/amba-clcd.c:785:5: error: 'endpoint' may be used uninitialized in this function [-Werror=maybe-uninitialized] This reverts the broken part of the function to what it was before the patch, which is the best guess I have to what it should be. I assume this was left over from an attempted rework of the code that was partially backed out. Signed-off-by: Arnd Bergmann Fixes: 046ad6cdeb3f ("video: ARM CLCD: support Nomadik variant") Cc: Linus Walleij Reviewed-by: Linus Walleij Reported-by: Colin Ian King Signed-off-by: Tomi Valkeinen

video: ARM CLCD: add special panel hook for Versatiles

2016-08-11T14:54:54+00:00

This adds a special panel init hook for the ARM reference designs Integrator (IM-PD1), Versatile and RealView, so we can configure a DPI panel from device tree and have it working without boardfiles for these machines. Basically this is the same code as from the board files, just moved over to look up the syscon DT node and manipulate the special CLCD register from their regmap. Tested on RealView PB11MPcore. Cc: Pawel Moll Cc: Rob Herring Cc: Russell King Signed-off-by: Linus Walleij Signed-off-by: Tomi Valkeinen

video: ARM CLCD: add special board and panel hooks for Nomadik

2016-08-11T14:54:54+00:00

In the .board_init() callback will set up a mux register in the Nomadik system controller. It so happens that the platform has two display output engines, and we have to poke a bit in a special register to make sure the right engine is muxed in as they are mutually exclusive. The Nomadik CLCD variant is instantiated on a platform where it is combined with a 800x480 TPO WVGA display. In the .panel_init() hook we will detect this display from the compatible string and set it up. We also add .enable() and .disable() callbacks for it as the sleep state is software controlled. The display is connected with a special 3-wire serial bus (this is sadly neither I2C or SPI) using three GPIO lines that we bitbang to detect the display and enable/disable sleep state. Cc: Pawel Moll Cc: Rob Herring Cc: Russell King Signed-off-by: Linus Walleij Signed-off-by: Tomi Valkeinen