len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-11-09 13:12:37 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

zen/zenxfi: don't switch emi on cpu change to avoid screen flicker

Browse source 
On those targets, since the LCDIF cannot recover from underflow, changing the
EMI frequency kills one frame and cause flicker.

Change-Id: Id3c130636bcfddcc6c54896602699fbaa1636ab4
This commit is contained in:
Amaury Pouly 2014-06-22 12:56:47 +02:00
parent 55c5c7ea66
commit 761f59c9e3
1 changed files with 14 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

18
firmware/target/arm/imx233/system-imx233.c
View file

@ -263,17 +263,27 @@ struct cpufreq_profile_t
int arm_cache_timings;
};
/* Some devices don't handle very well memory frequency changes, so avoid them
* by running at highest speed at all time */
#if defined(CREATIVE_ZEN) || defined(CREATIVE_ZENXFI)
#define EMIFREQ_NORMAL IMX233_EMIFREQ_130_MHz
#define EMIFREQ_MAX IMX233_EMIFREQ_130_MHz
#else /* weird targets */
#define EMIFREQ_NORMAL IMX233_EMIFREQ_64_MHz
#define EMIFREQ_MAX IMX233_EMIFREQ_130_MHz
#endif
#if IMX233_SUBTARGET >= 3700
static struct cpufreq_profile_t cpu_profiles[] =
{
/* clk_p@454.74 MHz, clk_h@151.58 MHz, clk_emi@130.91 MHz, VDDD@1.550 V */
{IMX233_CPUFREQ_454_MHz, 1550, 1450, 3, 1, 19, IMX233_EMIFREQ_130_MHz, 0},
{IMX233_CPUFREQ_454_MHz, 1550, 1450, 3, 1, 19, EMIFREQ_MAX, 0},
/* clk_p@320.00 MHz, clk_h@106.66 MHz, clk_emi@130.91 MHz, VDDD@1.450 V */
{IMX233_CPUFREQ_320_MHz, 1450, 1350, 3, 1, 27, IMX233_EMIFREQ_130_MHz, 0},
{IMX233_CPUFREQ_320_MHz, 1450, 1350, 3, 1, 27, EMIFREQ_MAX, 0},
/* clk_p@261.82 MHz, clk_h@130.91 MHz, clk_emi@130.91 MHz, VDDD@1.275 V */
{IMX233_CPUFREQ_261_MHz, 1275, 1175, 2, 1, 33, IMX233_EMIFREQ_130_MHz, 0},
{IMX233_CPUFREQ_261_MHz, 1275, 1175, 2, 1, 33, EMIFREQ_MAX, 0},
/* clk_p@64 MHz, clk_h@64 MHz, clk_emi@64 MHz, VDDD@1.050 V */
{IMX233_CPUFREQ_64_MHz, 1050, 975, 1, 5, 27, IMX233_EMIFREQ_64_MHz, 3},
{IMX233_CPUFREQ_64_MHz, 1050, 975, 1, 5, 27, EMIFREQ_NORMAL, 3},
/* dummy */
{0, 0, 0, 0, 0, 0, 0, 0}
};